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@@ -0,0 +1,40 @@
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# <small>nlohmann::json_pointer::</small>back
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```cpp
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const string_t& back() const;
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```
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Return the last reference token.
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## Return value
|
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Last reference token.
|
||||
|
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## Exceptions
|
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Throws [out_of_range.405](../../home/exceptions.md#jsonexceptionout_of_range405) if the JSON pointer has no parent.
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## Complexity
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|
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Constant.
|
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|
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## Examples
|
||||
|
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??? example
|
||||
|
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The example shows the usage of `back`.
|
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|
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```cpp
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--8<-- "examples/json_pointer__back.cpp"
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```
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Output:
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```json
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--8<-- "examples/json_pointer__back.output"
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```
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## Version history
|
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|
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- Added in version 3.6.0.
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- Changed return type to `string_t` in version 3.11.0.
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@@ -16,4 +16,4 @@
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<span class=p>}</span>
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</code></pre></div> <p>Output:</p> <div class=highlight><pre><span></span><code><span class=err>las</span><span class=kc>t</span><span class=w> </span><span class=err>re</span><span class=kc>feren</span><span class=err>ce</span><span class=w> </span><span class=kc>t</span><span class=err>oke</span><span class=kc>n</span><span class=w> </span><span class=err>o</span><span class=kc>f</span><span class=w> </span><span class=s2>"/foo"</span><span class=w> </span><span class=err>is</span><span class=w> </span><span class=s2>"foo"</span>
|
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<span class=err>las</span><span class=kc>t</span><span class=w> </span><span class=err>re</span><span class=kc>feren</span><span class=err>ce</span><span class=w> </span><span class=kc>t</span><span class=err>oke</span><span class=kc>n</span><span class=w> </span><span class=err>o</span><span class=kc>f</span><span class=w> </span><span class=s2>"/foo/0"</span><span class=w> </span><span class=err>is</span><span class=w> </span><span class=s2>"0"</span>
|
||||
</code></pre></div> </details> <h2 id=version-history>Version history<a class=headerlink href=#version-history title="Permanent link">¶</a></h2> <ul> <li>Added in version 3.6.0.</li> <li>Changed return type to <code>string_t</code> in version 3.11.0.</li> </ul> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="July 4, 2026 09:13:25 UTC">July 4, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - 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</code></pre></div> </details> <h2 id=version-history>Version history<a class=headerlink href=#version-history title="Permanent link">¶</a></h2> <ul> <li>Added in version 3.6.0.</li> <li>Changed return type to <code>string_t</code> in version 3.11.0.</li> </ul> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="July 8, 2026 18:18:24 UTC">July 8, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - 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|
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@@ -0,0 +1,55 @@
|
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# nlohmann::json_pointer::back
|
||||
|
||||
```
|
||||
const string_t& back() const;
|
||||
```
|
||||
|
||||
Return the last reference token.
|
||||
|
||||
## Return value
|
||||
|
||||
Last reference token.
|
||||
|
||||
## Exceptions
|
||||
|
||||
Throws [out_of_range.405](https://json.nlohmann.me/home/exceptions/#jsonexceptionout_of_range405) if the JSON pointer has no parent.
|
||||
|
||||
## Complexity
|
||||
|
||||
Constant.
|
||||
|
||||
## Examples
|
||||
|
||||
Example
|
||||
|
||||
The example shows the usage of `back`.
|
||||
|
||||
```
|
||||
#include <iostream>
|
||||
#include <nlohmann/json.hpp>
|
||||
|
||||
using json = nlohmann::json;
|
||||
|
||||
int main()
|
||||
{
|
||||
// different JSON Pointers
|
||||
json::json_pointer ptr1("/foo");
|
||||
json::json_pointer ptr2("/foo/0");
|
||||
|
||||
// call empty()
|
||||
std::cout << "last reference token of \"" << ptr1 << "\" is \"" << ptr1.back() << "\"\n"
|
||||
<< "last reference token of \"" << ptr2 << "\" is \"" << ptr2.back() << "\"" << std::endl;
|
||||
}
|
||||
```
|
||||
|
||||
Output:
|
||||
|
||||
```
|
||||
last reference token of "/foo" is "foo"
|
||||
last reference token of "/foo/0" is "0"
|
||||
```
|
||||
|
||||
## Version history
|
||||
|
||||
- Added in version 3.6.0.
|
||||
- Changed return type to `string_t` in version 3.11.0.
|
||||
@@ -0,0 +1,39 @@
|
||||
# <small>nlohmann::json_pointer::</small>empty
|
||||
|
||||
```cpp
|
||||
bool empty() const noexcept;
|
||||
```
|
||||
|
||||
Return whether the pointer points to the root document.
|
||||
|
||||
## Return value
|
||||
|
||||
`#!cpp true` iff the JSON pointer points to the root document.
|
||||
|
||||
## Exception safety
|
||||
|
||||
No-throw guarantee: this function never throws exceptions.
|
||||
|
||||
## Complexity
|
||||
|
||||
Constant.
|
||||
|
||||
## Examples
|
||||
|
||||
??? example
|
||||
|
||||
The example shows the result of `empty` for different JSON Pointers.
|
||||
|
||||
```cpp
|
||||
--8<-- "examples/json_pointer__empty.cpp"
|
||||
```
|
||||
|
||||
Output:
|
||||
|
||||
```json
|
||||
--8<-- "examples/json_pointer__empty.output"
|
||||
```
|
||||
|
||||
## Version history
|
||||
|
||||
Added in version 3.6.0.
|
||||
@@ -23,4 +23,4 @@
|
||||
<span class=nt>""</span><span class=p>:</span><span class=w> </span><span class=kc>true</span>
|
||||
<span class=nt>"/foo"</span><span class=p>:</span><span class=w> </span><span class=kc>false</span>
|
||||
<span class=nt>"/foo/0"</span><span class=p>:</span><span class=w> </span><span class=kc>false</span>
|
||||
</code></pre></div> </details> <h2 id=version-history>Version history<a class=headerlink href=#version-history title="Permanent link">¶</a></h2> <p>Added in version 3.6.0.</p> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="July 4, 2026 09:13:25 UTC">July 4, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - 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|
||||
</code></pre></div> </details> <h2 id=version-history>Version history<a class=headerlink href=#version-history title="Permanent link">¶</a></h2> <p>Added in version 3.6.0.</p> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="July 8, 2026 18:18:24 UTC">July 8, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - 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|
||||
@@ -0,0 +1,61 @@
|
||||
# nlohmann::json_pointer::empty
|
||||
|
||||
```
|
||||
bool empty() const noexcept;
|
||||
```
|
||||
|
||||
Return whether the pointer points to the root document.
|
||||
|
||||
## Return value
|
||||
|
||||
`true` iff the JSON pointer points to the root document.
|
||||
|
||||
## Exception safety
|
||||
|
||||
No-throw guarantee: this function never throws exceptions.
|
||||
|
||||
## Complexity
|
||||
|
||||
Constant.
|
||||
|
||||
## Examples
|
||||
|
||||
Example
|
||||
|
||||
The example shows the result of `empty` for different JSON Pointers.
|
||||
|
||||
```
|
||||
#include <iostream>
|
||||
#include <nlohmann/json.hpp>
|
||||
|
||||
using json = nlohmann::json;
|
||||
|
||||
int main()
|
||||
{
|
||||
// different JSON Pointers
|
||||
json::json_pointer ptr0;
|
||||
json::json_pointer ptr1("");
|
||||
json::json_pointer ptr2("/foo");
|
||||
json::json_pointer ptr3("/foo/0");
|
||||
|
||||
// call empty()
|
||||
std::cout << std::boolalpha
|
||||
<< "\"" << ptr0 << "\": " << ptr0.empty() << '\n'
|
||||
<< "\"" << ptr1 << "\": " << ptr1.empty() << '\n'
|
||||
<< "\"" << ptr2 << "\": " << ptr2.empty() << '\n'
|
||||
<< "\"" << ptr3 << "\": " << ptr3.empty() << std::endl;
|
||||
}
|
||||
```
|
||||
|
||||
Output:
|
||||
|
||||
```
|
||||
"": true
|
||||
"": true
|
||||
"/foo": false
|
||||
"/foo/0": false
|
||||
```
|
||||
|
||||
## Version history
|
||||
|
||||
Added in version 3.6.0.
|
||||
@@ -0,0 +1,39 @@
|
||||
# <small>nlohmann::json_pointer::</small>front
|
||||
|
||||
```cpp
|
||||
const string_t& front() const;
|
||||
```
|
||||
|
||||
Return the first reference token.
|
||||
|
||||
## Return value
|
||||
|
||||
First reference token.
|
||||
|
||||
## Exceptions
|
||||
|
||||
Throws [out_of_range.405](../../home/exceptions.md#jsonexceptionout_of_range405) if the JSON pointer has no parent.
|
||||
|
||||
## Complexity
|
||||
|
||||
Constant.
|
||||
|
||||
## Examples
|
||||
|
||||
??? example
|
||||
|
||||
The example shows the usage of `front`.
|
||||
|
||||
```cpp
|
||||
--8<-- "examples/json_pointer__front.cpp"
|
||||
```
|
||||
|
||||
Output:
|
||||
|
||||
```json
|
||||
--8<-- "examples/json_pointer__front.output"
|
||||
```
|
||||
|
||||
## Version history
|
||||
|
||||
- Added in version 3.12.x.
|
||||
@@ -16,4 +16,4 @@
|
||||
<span class=p>}</span>
|
||||
</code></pre></div> <p>Output:</p> <div class=highlight><pre><span></span><code><span class=kc>f</span><span class=err>irs</span><span class=kc>t</span><span class=w> </span><span class=err>re</span><span class=kc>feren</span><span class=err>ce</span><span class=w> </span><span class=kc>t</span><span class=err>oke</span><span class=kc>n</span><span class=w> </span><span class=err>o</span><span class=kc>f</span><span class=w> </span><span class=s2>"/foo"</span><span class=w> </span><span class=err>is</span><span class=w> </span><span class=s2>"foo"</span>
|
||||
<span class=kc>f</span><span class=err>irs</span><span class=kc>t</span><span class=w> </span><span class=err>re</span><span class=kc>feren</span><span class=err>ce</span><span class=w> </span><span class=kc>t</span><span class=err>oke</span><span class=kc>n</span><span class=w> </span><span class=err>o</span><span class=kc>f</span><span class=w> </span><span class=s2>"/foo/0"</span><span class=w> </span><span class=err>is</span><span class=w> </span><span class=s2>"foo"</span>
|
||||
</code></pre></div> </details> <h2 id=version-history>Version history<a class=headerlink href=#version-history title="Permanent link">¶</a></h2> <ul> <li>Added in version 3.12.x.</li> </ul> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="July 4, 2026 09:13:25 UTC">July 4, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - 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|
||||
</code></pre></div> </details> <h2 id=version-history>Version history<a class=headerlink href=#version-history title="Permanent link">¶</a></h2> <ul> <li>Added in version 3.12.x.</li> </ul> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="July 8, 2026 18:18:24 UTC">July 8, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - 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|
||||
@@ -0,0 +1,54 @@
|
||||
# nlohmann::json_pointer::front
|
||||
|
||||
```
|
||||
const string_t& front() const;
|
||||
```
|
||||
|
||||
Return the first reference token.
|
||||
|
||||
## Return value
|
||||
|
||||
First reference token.
|
||||
|
||||
## Exceptions
|
||||
|
||||
Throws [out_of_range.405](https://json.nlohmann.me/home/exceptions/#jsonexceptionout_of_range405) if the JSON pointer has no parent.
|
||||
|
||||
## Complexity
|
||||
|
||||
Constant.
|
||||
|
||||
## Examples
|
||||
|
||||
Example
|
||||
|
||||
The example shows the usage of `front`.
|
||||
|
||||
```
|
||||
#include <iostream>
|
||||
#include <nlohmann/json.hpp>
|
||||
|
||||
using json = nlohmann::json;
|
||||
|
||||
int main()
|
||||
{
|
||||
// different JSON Pointers
|
||||
json::json_pointer ptr1("/foo");
|
||||
json::json_pointer ptr2("/foo/0");
|
||||
|
||||
// call empty()
|
||||
std::cout << "first reference token of \"" << ptr1 << "\" is \"" << ptr1.front() << "\"\n"
|
||||
<< "first reference token of \"" << ptr2 << "\" is \"" << ptr2.front() << "\"" << std::endl;
|
||||
}
|
||||
```
|
||||
|
||||
Output:
|
||||
|
||||
```
|
||||
first reference token of "/foo" is "foo"
|
||||
first reference token of "/foo/0" is "foo"
|
||||
```
|
||||
|
||||
## Version history
|
||||
|
||||
- Added in version 3.12.x.
|
||||
@@ -1,3 +1,3 @@
|
||||
<!doctype html><html lang=en class=no-js> <head><meta charset=utf-8><meta name=viewport content="width=device-width,initial-scale=1"><meta name=author content="Niels Lohmann"><link href="https://json.nlohmann.me/api/json_pointer/" rel="canonical"><link href=../json/ rel=prev><link href=json_pointer/ rel=next><link rel=icon href=../../assets/images/favicon.png><meta name=generator content="mkdocs-1.6.1, mkdocs-material-9.7.6"><title>Overview - JSON for Modern C++</title><link rel=stylesheet href=../../assets/stylesheets/main.484c7ddc.min.css><link rel=stylesheet href=../../assets/stylesheets/palette.ab4e12ef.min.css><link rel="stylesheet" href="../../assets/external/fonts.googleapis.com/css.61a430c9.css"><style>:root{--md-text-font:"Roboto";--md-code-font:"JetBrains Mono"}</style><link rel=stylesheet href=../../css/custom.css><script>__md_scope=new 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<svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M12 8a3 3 0 0 0 3-3 3 3 0 0 0-3-3 3 3 0 0 0-3 3 3 3 0 0 0 3 3m0 3.54C9.64 9.35 6.5 8 3 8v11c3.5 0 6.64 1.35 9 3.54 2.36-2.19 5.5-3.54 9-3.54V8c-3.5 0-6.64 1.35-9 3.54"/></svg> </a> <label class="md-header__button md-icon" for=__drawer> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M3 6h18v2H3zm0 5h18v2H3zm0 5h18v2H3z"/></svg> </label> <div class=md-header__title data-md-component=header-title> <div class=md-header__ellipsis> <div class=md-header__topic> <span class=md-ellipsis> JSON for Modern C++ </span> </div> <div class=md-header__topic data-md-component=header-topic> <span class=md-ellipsis> Overview </span> </div> </div> </div> <form class=md-header__option data-md-component=palette> <input class=md-option data-md-color-media="(prefers-color-scheme: light)" data-md-color-scheme=default data-md-color-primary=indigo data-md-color-accent=indigo aria-label="Switch to dark mode" type=radio 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15.31V20h4.69L12 23.31 15.31 20H20v-4.69L23.31 12z"/></svg> </label> </form> <script>var palette=__md_get("__palette");if(palette&&palette.color){if("(prefers-color-scheme)"===palette.color.media){var media=matchMedia("(prefers-color-scheme: light)"),input=document.querySelector(media.matches?"[data-md-color-media='(prefers-color-scheme: light)']":"[data-md-color-media='(prefers-color-scheme: dark)']");palette.color.media=input.getAttribute("data-md-color-media"),palette.color.scheme=input.getAttribute("data-md-color-scheme"),palette.color.primary=input.getAttribute("data-md-color-primary"),palette.color.accent=input.getAttribute("data-md-color-accent")}for(var[key,value]of Object.entries(palette.color))document.body.setAttribute("data-md-color-"+key,value)}</script> <label class="md-header__button md-icon" for=__search> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M9.5 3A6.5 6.5 0 0 1 16 9.5c0 1.61-.59 3.09-1.56 4.23l.27.27h.79l5 5-1.5 1.5-5-5v-.79l-.27-.27A6.52 6.52 0 0 1 9.5 16 6.5 6.5 0 0 1 3 9.5 6.5 6.5 0 0 1 9.5 3m0 2C7 5 5 7 5 9.5S7 14 9.5 14 14 12 14 9.5 12 5 9.5 5"/></svg> </label> <div class=md-search data-Line truncated
|
||||
<span class=k>class</span><span class=w> </span><span class=nc>json_pointer</span><span class=p>;</span>
|
||||
</code></pre></div> <p>A <abbr title="JavaScript Object Notation">JSON</abbr> pointer defines a string syntax for identifying a specific value within a <abbr title="JavaScript Object Notation">JSON</abbr> document. It can be used with functions <a href=../basic_json/at/ ><code>at</code></a> and <a href=../basic_json/operator%5B%5D/ ><code>operator[]</code></a>. Furthermore, <abbr title="JavaScript Object Notation">JSON</abbr> pointers are the base for <abbr title="JavaScript Object Notation">JSON</abbr> patches.</p> <h2 id=template-parameters>Template parameters<a class=headerlink href=#template-parameters title="Permanent link">¶</a></h2> <dl> <dt><code>RefStringType</code></dt> <dd>the string type used for the reference tokens making up the <abbr title="JavaScript Object Notation">JSON</abbr> pointer</dd> </dl> <div class="admonition warning"> <p class=admonition-title>Deprecation</p> <p>For backwards compatibility <code>RefStringType</code> may also be a specialization of <a href=../basic_json/ ><code>basic_json</code></a> in which case <code>string_t</code> will be deduced as <a href=../basic_json/string_t/ ><code>basic_json::string_t</code></a>. This feature is deprecated and may be removed in a future major version.</p> </div> <h2 id=member-types>Member types<a class=headerlink href=#member-types title="Permanent link">¶</a></h2> <ul> <li><a href=string_t/ ><strong>string_t</strong></a> - the string type used for the reference tokens</li> </ul> <h2 id=member-functions>Member functions<a class=headerlink href=#member-functions title="Permanent link">¶</a></h2> <ul> <li><a href=json_pointer/ >(constructor)</a></li> <li><a href=to_string/ ><strong>to_string</strong></a> - return a string representation of the <abbr title="JavaScript Object Notation">JSON</abbr> pointer</li> <li><a href=operator_string_t/ ><strong>operator string_t</strong></a> - return a string representation of the <abbr title="JavaScript Object Notation">JSON</abbr> pointer</li> <li><a href=operator_eq/ ><strong>operator==</strong></a> - compare: equal</li> <li><a href=operator_ne/ ><strong>operator!=</strong></a> - compare: not equal</li> <li><a href=operator_slasheq/ ><strong>operator/=</strong></a> - append to the end of the <abbr title="JavaScript Object Notation">JSON</abbr> pointer</li> <li><a href=operator_slash/ ><strong>operator/</strong></a> - create <abbr title="JavaScript Object Notation">JSON</abbr> Pointer by appending</li> <li><a href=parent_pointer/ ><strong>parent_pointer</strong></a> - returns the parent of this <abbr title="JavaScript Object Notation">JSON</abbr> pointer</li> <li><a href=pop_back/ ><strong>pop_back</strong></a> - remove the last reference token</li> <li><a href=back/ ><strong>back</strong></a> - return last reference token</li> <li><a href=push_back/ ><strong>push_back</strong></a> - append an unescaped token at the end of the pointer</li> <li><a href=pop_front/ ><strong>pop_front</strong></a> - remove the first reference token</li> <li><a href=front/ ><strong>front</strong></a> - return first reference token</li> <li><a href=push_front/ ><strong>push_front</strong></a> - append an unescaped token at the start of the pointer</li> <li><a href=empty/ ><strong>empty</strong></a> - return whether the pointer points to the root document</li> </ul> <h2 id=literals>Literals<a class=headerlink href=#literals title="Permanent link">¶</a></h2> <ul> <li><a href=../operator_literal_json_pointer/ ><strong>operator""_json_pointer</strong></a> - user-defined string literal for <abbr title="JavaScript Object Notation">JSON</abbr> pointers</li> </ul> <h2 id=see-also>See also<a class=headerlink href=#see-also title="Permanent link">¶</a></h2> <ul> <li><a href="https://datatracker.ietf.org/doc/html/rfc6901"><abbr title="Request for Comments">RFC</abbr> 6901</a></li> </ul> <h2 id=version-history>Version history<a class=headerlink href=#version-history title="Permanent link">¶</a></h2> <ul> <li>Added in version 2.0.0.</li> <li>Changed template parameter from <code>basic_json</code> to string type in version 3.11.0.</li> </ul> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="July 4, 2026 09:13:25 UTC">July 4, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")Line truncated
|
||||
</code></pre></div> <p>A <abbr title="JavaScript Object Notation">JSON</abbr> pointer defines a string syntax for identifying a specific value within a <abbr title="JavaScript Object Notation">JSON</abbr> document. It can be used with functions <a href=../basic_json/at/ ><code>at</code></a> and <a href=../basic_json/operator%5B%5D/ ><code>operator[]</code></a>. Furthermore, <abbr title="JavaScript Object Notation">JSON</abbr> pointers are the base for <abbr title="JavaScript Object Notation">JSON</abbr> patches.</p> <h2 id=template-parameters>Template parameters<a class=headerlink href=#template-parameters title="Permanent link">¶</a></h2> <dl> <dt><code>RefStringType</code></dt> <dd>the string type used for the reference tokens making up the <abbr title="JavaScript Object Notation">JSON</abbr> pointer</dd> </dl> <div class="admonition warning"> <p class=admonition-title>Deprecation</p> <p>For backwards compatibility <code>RefStringType</code> may also be a specialization of <a href=../basic_json/ ><code>basic_json</code></a> in which case <code>string_t</code> will be deduced as <a href=../basic_json/string_t/ ><code>basic_json::string_t</code></a>. This feature is deprecated and may be removed in a future major version.</p> </div> <h2 id=member-types>Member types<a class=headerlink href=#member-types title="Permanent link">¶</a></h2> <ul> <li><a href=string_t/ ><strong>string_t</strong></a> - the string type used for the reference tokens</li> </ul> <h2 id=member-functions>Member functions<a class=headerlink href=#member-functions title="Permanent link">¶</a></h2> <ul> <li><a href=json_pointer/ >(constructor)</a></li> <li><a href=to_string/ ><strong>to_string</strong></a> - return a string representation of the <abbr title="JavaScript Object Notation">JSON</abbr> pointer</li> <li><a href=operator_string_t/ ><strong>operator string_t</strong></a> - return a string representation of the <abbr title="JavaScript Object Notation">JSON</abbr> pointer</li> <li><a href=operator_eq/ ><strong>operator==</strong></a> - compare: equal</li> <li><a href=operator_ne/ ><strong>operator!=</strong></a> - compare: not equal</li> <li><a href=operator_slasheq/ ><strong>operator/=</strong></a> - append to the end of the <abbr title="JavaScript Object Notation">JSON</abbr> pointer</li> <li><a href=operator_slash/ ><strong>operator/</strong></a> - create <abbr title="JavaScript Object Notation">JSON</abbr> Pointer by appending</li> <li><a href=parent_pointer/ ><strong>parent_pointer</strong></a> - returns the parent of this <abbr title="JavaScript Object Notation">JSON</abbr> pointer</li> <li><a href=pop_back/ ><strong>pop_back</strong></a> - remove the last reference token</li> <li><a href=back/ ><strong>back</strong></a> - return last reference token</li> <li><a href=push_back/ ><strong>push_back</strong></a> - append an unescaped token at the end of the pointer</li> <li><a href=pop_front/ ><strong>pop_front</strong></a> - remove the first reference token</li> <li><a href=front/ ><strong>front</strong></a> - return first reference token</li> <li><a href=push_front/ ><strong>push_front</strong></a> - append an unescaped token at the start of the pointer</li> <li><a href=empty/ ><strong>empty</strong></a> - return whether the pointer points to the root document</li> </ul> <h2 id=literals>Literals<a class=headerlink href=#literals title="Permanent link">¶</a></h2> <ul> <li><a href=../operator_literal_json_pointer/ ><strong>operator""_json_pointer</strong></a> - user-defined string literal for <abbr title="JavaScript Object Notation">JSON</abbr> pointers</li> </ul> <h2 id=see-also>See also<a class=headerlink href=#see-also title="Permanent link">¶</a></h2> <ul> <li><a href="https://datatracker.ietf.org/doc/html/rfc6901"><abbr title="Request for Comments">RFC</abbr> 6901</a></li> </ul> <h2 id=version-history>Version history<a class=headerlink href=#version-history title="Permanent link">¶</a></h2> <ul> <li>Added in version 2.0.0.</li> <li>Changed template parameter from <code>basic_json</code> to string type in version 3.11.0.</li> </ul> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="July 8, 2026 18:18:24 UTC">July 8, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")Line truncated
|
||||
@@ -0,0 +1,51 @@
|
||||
# nlohmann::json_pointer
|
||||
|
||||
```
|
||||
template<typename RefStringType>
|
||||
class json_pointer;
|
||||
```
|
||||
|
||||
A JSON pointer defines a string syntax for identifying a specific value within a JSON document. It can be used with functions [`at`](https://json.nlohmann.me/api/basic_json/at/index.md) and [`operator[]`](https://json.nlohmann.me/api/basic_json/operator%5B%5D/index.md). Furthermore, JSON pointers are the base for JSON patches.
|
||||
|
||||
## Template parameters
|
||||
|
||||
`RefStringType` : the string type used for the reference tokens making up the JSON pointer
|
||||
|
||||
Deprecation
|
||||
|
||||
For backwards compatibility `RefStringType` may also be a specialization of [`basic_json`](https://json.nlohmann.me/api/basic_json/index.md) in which case `string_t` will be deduced as [`basic_json::string_t`](https://json.nlohmann.me/api/basic_json/string_t/index.md). This feature is deprecated and may be removed in a future major version.
|
||||
|
||||
## Member types
|
||||
|
||||
- [**string_t**](https://json.nlohmann.me/api/json_pointer/string_t/index.md) - the string type used for the reference tokens
|
||||
|
||||
## Member functions
|
||||
|
||||
- [(constructor)](https://json.nlohmann.me/api/json_pointer/json_pointer/index.md)
|
||||
- [**to_string**](https://json.nlohmann.me/api/json_pointer/to_string/index.md) - return a string representation of the JSON pointer
|
||||
- [**operator string_t**](https://json.nlohmann.me/api/json_pointer/operator_string_t/index.md) - return a string representation of the JSON pointer
|
||||
- [**operator==**](https://json.nlohmann.me/api/json_pointer/operator_eq/index.md) - compare: equal
|
||||
- [**operator!=**](https://json.nlohmann.me/api/json_pointer/operator_ne/index.md) - compare: not equal
|
||||
- [**operator/=**](https://json.nlohmann.me/api/json_pointer/operator_slasheq/index.md) - append to the end of the JSON pointer
|
||||
- [**operator/**](https://json.nlohmann.me/api/json_pointer/operator_slash/index.md) - create JSON Pointer by appending
|
||||
- [**parent_pointer**](https://json.nlohmann.me/api/json_pointer/parent_pointer/index.md) - returns the parent of this JSON pointer
|
||||
- [**pop_back**](https://json.nlohmann.me/api/json_pointer/pop_back/index.md) - remove the last reference token
|
||||
- [**back**](https://json.nlohmann.me/api/json_pointer/back/index.md) - return last reference token
|
||||
- [**push_back**](https://json.nlohmann.me/api/json_pointer/push_back/index.md) - append an unescaped token at the end of the pointer
|
||||
- [**pop_front**](https://json.nlohmann.me/api/json_pointer/pop_front/index.md) - remove the first reference token
|
||||
- [**front**](https://json.nlohmann.me/api/json_pointer/front/index.md) - return first reference token
|
||||
- [**push_front**](https://json.nlohmann.me/api/json_pointer/push_front/index.md) - append an unescaped token at the start of the pointer
|
||||
- [**empty**](https://json.nlohmann.me/api/json_pointer/empty/index.md) - return whether the pointer points to the root document
|
||||
|
||||
## Literals
|
||||
|
||||
- [**operator""\_json_pointer**](https://json.nlohmann.me/api/operator_literal_json_pointer/index.md) - user-defined string literal for JSON pointers
|
||||
|
||||
## See also
|
||||
|
||||
- [RFC 6901](https://datatracker.ietf.org/doc/html/rfc6901)
|
||||
|
||||
## Version history
|
||||
|
||||
- Added in version 2.0.0.
|
||||
- Changed template parameter from `basic_json` to string type in version 3.11.0.
|
||||
@@ -0,0 +1,41 @@
|
||||
# <small>nlohmann::json_pointer::</small>json_pointer
|
||||
|
||||
```cpp
|
||||
explicit json_pointer(const string_t& s = "");
|
||||
```
|
||||
|
||||
Create a JSON pointer according to the syntax described in
|
||||
[Section 3 of RFC6901](https://tools.ietf.org/html/rfc6901#section-3).
|
||||
|
||||
## Parameters
|
||||
|
||||
`s` (in)
|
||||
: string representing the JSON pointer; if omitted, the empty string is assumed which references the whole JSON value
|
||||
|
||||
## Exceptions
|
||||
|
||||
- Throws [parse_error.107](../../home/exceptions.md#jsonexceptionparse_error107) if the given JSON pointer `s` is
|
||||
nonempty and does not begin with a slash (`/`); see example below.
|
||||
- Throws [parse_error.108](../../home/exceptions.md#jsonexceptionparse_error108) if a tilde (`~`) in the given JSON
|
||||
pointer `s` is not followed by `0` (representing `~`) or `1` (representing `/`); see example below.
|
||||
|
||||
## Examples
|
||||
|
||||
??? example
|
||||
|
||||
The example shows the construction several valid JSON pointers as well as the exceptional behavior.
|
||||
|
||||
```cpp
|
||||
--8<-- "examples/json_pointer.cpp"
|
||||
```
|
||||
|
||||
Output:
|
||||
|
||||
```json
|
||||
--8<-- "examples/json_pointer.output"
|
||||
```
|
||||
|
||||
## Version history
|
||||
|
||||
- Added in version 2.0.0.
|
||||
- Changed type of `s` to `string_t` in version 3.11.0.
|
||||
@@ -49,4 +49,4 @@
|
||||
</code></pre></div> <p>Output:</p> <div class=highlight><pre><span></span><code><span class=p>[</span><span class=err>jso</span><span class=kc>n</span><span class=err>.excep</span><span class=kc>t</span><span class=err>io</span><span class=kc>n</span><span class=err>.parse_error.</span><span class=mi>107</span><span class=p>]</span><span class=w> </span><span class=err>parse</span><span class=w> </span><span class=err>error</span><span class=w> </span><span class=err>a</span><span class=kc>t</span><span class=w> </span><span class=err>by</span><span class=kc>te</span><span class=w> </span><span class=mi>1</span><span class=p>:</span><span class=w> </span><span class=err>JSON</span><span class=w> </span><span class=err>poi</span><span class=kc>nter</span><span class=w> </span><span class=err>mus</span><span class=kc>t</span><span class=w> </span><span class=err>be</span><span class=w> </span><span class=err>emp</span><span class=kc>t</span><span class=err>y</span><span class=w> </span><span class=err>or</span><span class=w> </span><span class=err>begi</span><span class=kc>n</span><span class=w> </span><span class=err>wi</span><span class=kc>t</span><span class=err>h</span><span class=w> </span><span class=err>'/'</span><span class=w> </span><span class=mi>-</span><span class=w> </span><span class=err>was</span><span class=p>:</span><span class=w> </span><span class=err>'</span><span class=kc>f</span><span class=err>oo'</span>
|
||||
<span class=p>[</span><span class=err>jso</span><span class=kc>n</span><span class=err>.excep</span><span class=kc>t</span><span class=err>io</span><span class=kc>n</span><span class=err>.parse_error.</span><span class=mi>108</span><span class=p>]</span><span class=w> </span><span class=err>parse</span><span class=w> </span><span class=err>error</span><span class=p>:</span><span class=w> </span><span class=err>escape</span><span class=w> </span><span class=err>charac</span><span class=kc>ter</span><span class=w> </span><span class=err>'~'</span><span class=w> </span><span class=err>mus</span><span class=kc>t</span><span class=w> </span><span class=err>be</span><span class=w> </span><span class=kc>f</span><span class=err>ollowed</span><span class=w> </span><span class=err>wi</span><span class=kc>t</span><span class=err>h</span><span class=w> </span><span class=err>'</span><span class=mi>0</span><span class=err>'</span><span class=w> </span><span class=err>or</span><span class=w> </span><span class=err>'</span><span class=mi>1</span><span class=err>'</span>
|
||||
<span class=p>[</span><span class=err>jso</span><span class=kc>n</span><span class=err>.excep</span><span class=kc>t</span><span class=err>io</span><span class=kc>n</span><span class=err>.parse_error.</span><span class=mi>108</span><span class=p>]</span><span class=w> </span><span class=err>parse</span><span class=w> </span><span class=err>error</span><span class=p>:</span><span class=w> </span><span class=err>escape</span><span class=w> </span><span class=err>charac</span><span class=kc>ter</span><span class=w> </span><span class=err>'~'</span><span class=w> </span><span class=err>mus</span><span class=kc>t</span><span class=w> </span><span class=err>be</span><span class=w> </span><span class=kc>f</span><span class=err>ollowed</span><span class=w> </span><span class=err>wi</span><span class=kc>t</span><span class=err>h</span><span class=w> </span><span class=err>'</span><span class=mi>0</span><span class=err>'</span><span class=w> </span><span class=err>or</span><span class=w> </span><span class=err>'</span><span class=mi>1</span><span class=err>'</span>
|
||||
</code></pre></div> </details> <h2 id=version-history>Version history<a class=headerlink href=#version-history title="Permanent link">¶</a></h2> <ul> <li>Added in version 2.0.0.</li> <li>Changed type of <code>s</code> to <code>string_t</code> in version 3.11.0.</li> </ul> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="July 4, 2026 09:13:25 UTC">July 4, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - 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|
||||
</code></pre></div> </details> <h2 id=version-history>Version history<a class=headerlink href=#version-history title="Permanent link">¶</a></h2> <ul> <li>Added in version 2.0.0.</li> <li>Changed type of <code>s</code> to <code>string_t</code> in version 3.11.0.</li> </ul> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="July 8, 2026 18:18:24 UTC">July 8, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - 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|
||||
@@ -0,0 +1,85 @@
|
||||
# nlohmann::json_pointer::json_pointer
|
||||
|
||||
```
|
||||
explicit json_pointer(const string_t& s = "");
|
||||
```
|
||||
|
||||
Create a JSON pointer according to the syntax described in [Section 3 of RFC6901](https://tools.ietf.org/html/rfc6901#section-3).
|
||||
|
||||
## Parameters
|
||||
|
||||
`s` (in) : string representing the JSON pointer; if omitted, the empty string is assumed which references the whole JSON value
|
||||
|
||||
## Exceptions
|
||||
|
||||
- Throws [parse_error.107](https://json.nlohmann.me/home/exceptions/#jsonexceptionparse_error107) if the given JSON pointer `s` is nonempty and does not begin with a slash (`/`); see example below.
|
||||
- Throws [parse_error.108](https://json.nlohmann.me/home/exceptions/#jsonexceptionparse_error108) if a tilde (`~`) in the given JSON pointer `s` is not followed by `0` (representing `~`) or `1` (representing `/`); see example below.
|
||||
|
||||
## Examples
|
||||
|
||||
Example
|
||||
|
||||
The example shows the construction several valid JSON pointers as well as the exceptional behavior.
|
||||
|
||||
```
|
||||
#include <iostream>
|
||||
#include <nlohmann/json.hpp>
|
||||
|
||||
using json = nlohmann::json;
|
||||
|
||||
int main()
|
||||
{
|
||||
// correct JSON pointers
|
||||
json::json_pointer p1;
|
||||
json::json_pointer p2("");
|
||||
json::json_pointer p3("/");
|
||||
json::json_pointer p4("//");
|
||||
json::json_pointer p5("/foo/bar");
|
||||
json::json_pointer p6("/foo/bar/-");
|
||||
json::json_pointer p7("/foo/~0");
|
||||
json::json_pointer p8("/foo/~1");
|
||||
|
||||
// error: JSON pointer does not begin with a slash
|
||||
try
|
||||
{
|
||||
json::json_pointer p9("foo");
|
||||
}
|
||||
catch (const json::parse_error& e)
|
||||
{
|
||||
std::cout << e.what() << '\n';
|
||||
}
|
||||
|
||||
// error: JSON pointer uses escape symbol ~ not followed by 0 or 1
|
||||
try
|
||||
{
|
||||
json::json_pointer p10("/foo/~");
|
||||
}
|
||||
catch (const json::parse_error& e)
|
||||
{
|
||||
std::cout << e.what() << '\n';
|
||||
}
|
||||
|
||||
// error: JSON pointer uses escape symbol ~ not followed by 0 or 1
|
||||
try
|
||||
{
|
||||
json::json_pointer p11("/foo/~3");
|
||||
}
|
||||
catch (const json::parse_error& e)
|
||||
{
|
||||
std::cout << e.what() << '\n';
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
Output:
|
||||
|
||||
```
|
||||
[json.exception.parse_error.107] parse error at byte 1: JSON pointer must be empty or begin with '/' - was: 'foo'
|
||||
[json.exception.parse_error.108] parse error: escape character '~' must be followed with '0' or '1'
|
||||
[json.exception.parse_error.108] parse error: escape character '~' must be followed with '0' or '1'
|
||||
```
|
||||
|
||||
## Version history
|
||||
|
||||
- Added in version 2.0.0.
|
||||
- Changed type of `s` to `string_t` in version 3.11.0.
|
||||
@@ -0,0 +1,113 @@
|
||||
# <small>nlohmann::json_pointer::</small>operator==
|
||||
|
||||
```cpp
|
||||
// until C++20
|
||||
template<typename RefStringTypeLhs, typename RefStringTypeRhs>
|
||||
bool operator==(
|
||||
const json_pointer<RefStringTypeLhs>& lhs,
|
||||
const json_pointer<RefStringTypeRhs>& rhs) noexcept; // (1)
|
||||
|
||||
template<typename RefStringTypeLhs, typename StringType>
|
||||
bool operator==(
|
||||
const json_pointer<RefStringTypeLhs>& lhs,
|
||||
const StringType& rhs); // (2)
|
||||
|
||||
template<typename RefStringTypeRhs, typename StringType>
|
||||
bool operator==(
|
||||
const StringType& lhs,
|
||||
const json_pointer<RefStringTypeRhs>& rhs); // (2)
|
||||
|
||||
// since C++20
|
||||
class json_pointer {
|
||||
template<typename RefStringTypeRhs>
|
||||
bool operator==(
|
||||
const json_pointer<RefStringTypeRhs>& rhs) const noexcept; // (1)
|
||||
|
||||
bool operator==(const string_t& rhs) const; // (2)
|
||||
};
|
||||
```
|
||||
|
||||
1. Compares two JSON pointers for equality by comparing their reference tokens.
|
||||
|
||||
2. Compares a JSON pointer and a string or a string and a JSON pointer for equality by converting the string to a JSON
|
||||
pointer and comparing the JSON pointers according to 1.
|
||||
|
||||
## Template parameters
|
||||
|
||||
`RefStringTypeLhs`, `RefStringTypeRhs`
|
||||
: the string type of the left-hand side or right-hand side JSON pointer, respectively
|
||||
|
||||
`StringType`
|
||||
: the string type derived from the `json_pointer` operand ([`json_pointer::string_t`](string_t.md))
|
||||
|
||||
## Parameters
|
||||
|
||||
`lhs` (in)
|
||||
: first value to consider
|
||||
|
||||
`rhs` (in)
|
||||
: second value to consider
|
||||
|
||||
## Return value
|
||||
|
||||
whether the values `lhs`/`*this` and `rhs` are equal
|
||||
|
||||
## Exception safety
|
||||
|
||||
1. No-throw guarantee: this function never throws exceptions.
|
||||
2. Strong exception safety: if an exception occurs, the original value stays intact.
|
||||
|
||||
## Exceptions
|
||||
|
||||
1. (none)
|
||||
2. The function can throw the following exceptions:
|
||||
- Throws [parse_error.107](../../home/exceptions.md#jsonexceptionparse_error107) if the given JSON pointer `s` is
|
||||
nonempty and does not begin with a slash (`/`); see example below.
|
||||
- Throws [parse_error.108](../../home/exceptions.md#jsonexceptionparse_error108) if a tilde (`~`) in the given JSON
|
||||
pointer `s` is not followed by `0` (representing `~`) or `1` (representing `/`); see example below.
|
||||
|
||||
## Complexity
|
||||
|
||||
Constant if `lhs` and `rhs` differ in the number of reference tokens, otherwise linear in the number of reference
|
||||
tokens.
|
||||
|
||||
## Notes
|
||||
|
||||
!!! warning "Deprecation"
|
||||
|
||||
Overload 2 is deprecated and will be removed in a future major version release.
|
||||
|
||||
## Examples
|
||||
|
||||
??? example "Example: (1) Comparing JSON pointers"
|
||||
|
||||
The example demonstrates comparing JSON pointers.
|
||||
|
||||
```cpp
|
||||
--8<-- "examples/json_pointer__operator__equal.cpp"
|
||||
```
|
||||
|
||||
Output:
|
||||
|
||||
```
|
||||
--8<-- "examples/json_pointer__operator__equal.output"
|
||||
```
|
||||
|
||||
??? example "Example: (2) Comparing JSON pointers and strings"
|
||||
|
||||
The example demonstrates comparing JSON pointers and strings, and when doing so may raise an exception.
|
||||
|
||||
```cpp
|
||||
--8<-- "examples/json_pointer__operator__equal_stringtype.cpp"
|
||||
```
|
||||
|
||||
Output:
|
||||
|
||||
```
|
||||
--8<-- "examples/json_pointer__operator__equal_stringtype.output"
|
||||
```
|
||||
|
||||
## Version history
|
||||
|
||||
1. Added in version 2.1.0. Added C++20 member functions in version 3.11.2.
|
||||
2. Added for backward compatibility and deprecated in version 3.11.2.
|
||||
@@ -82,4 +82,4 @@
|
||||
"" == "": true
|
||||
"/foo" == "/foo": true
|
||||
"bar" == "/foo": [json.exception.parse_error.107] parse error at byte 1: JSON pointer must be empty or begin with '/' - was: 'bar'
|
||||
</code></pre></div> </details> <h2 id=version-history>Version history<a class=headerlink href=#version-history title="Permanent link">¶</a></h2> <ol> <li>Added in version 2.1.0. Added C++20 member functions in version 3.11.2.</li> <li>Added for backward compatibility and deprecated in version 3.11.2.</li> </ol> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="July 4, 2026 09:13:25 UTC">July 4, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path d="M173.9 397.4c0 2-2.3 3.6-5.2 3.6-3.3.3-5.6-1.3-5.6-3.6 0-2 2.3-3.6 5.2-3.6 3-.3 5.6 1.3 5.6 3.6m-31.1-4.5c-.7 2 1.3 4.3 4.3 4.9 2.6 1 5.6 0 6.2-2s-1.3-4.3-4.3-5.2c-2.6-.7-5.5.3-6.2 2.3m44.2-1.7c-2.9.7-4.9 2.6-4.6 4.9.3 2 2.9 3.3 5.9 2.6 2.9-.7 4.9-2.6 4.6-4.6-.3-1.9-3-3.2-5.9-2.9M252.8 8C114.1 8 8 113.3 8 252c0 110.9 69.8 205.8 169.5 239.2 12.8 2.3 17.3-5.6 17.3-12.1 0-6.2-.3-40.4-.3-61.4 0 0-70 15-84.7-29.8 0 0-11.4-29.1-27.8-36.6 0 0-22.9-15.7 1.6-15.4 0 0 24.9 2 38.6 25.8 21.9 38.6 58.6 27.5 72.9 20.9 2.3-16 8.8-27.1 16-33.7-55.9-6.2-112.3-14.3-112.3-110.5 0-27.5 7.6-41.3 23.6-58.9-2.6-6.5-11.1-33.3 2.6-67.9 20.9-6.5 69 27 69 27 20-5.6 41.5-8.5 62.8-8.5s42.8 2.9 62.8 8.5c0 0 48.1-33.6 69-27 13.7 34.7 5.2 61.4 2.6 67.9 16 17.7 25.8 31.5 25.8 58.9 0 96.5-58.9 104.2-114.8 110.5 9.2 7.9 17 22.9 17 46.4 0 33.7-.3 75.4-.3 83.6 0 6.5 4.6 14.4 17.3 12.1C436.2 457.8 504 362.9 504 252 504 113.3 391.5 8 252.8 8M105.2 352.9c-1.3 1-1 3.3.7 5.2 1.6 1.6 3.9 2.3 5.2 1 1.3-1 1-3.3-.7-5.2-1.6-1.6-3.9-2.3-5.2-1m-10.8-8.1c-.7 1.3.3 2.9 2.3 3.9 1.6 1 3.6.7 4.3-.7.7-1.3-.3-2.9-2.3-3.9-2-.6-3.6-.3-4.3.7m32.4 35.6c-1.6 1.3-1 4.3 1.3 6.2 2.3 2.3 5.2 2.6 6.5 1 1.3-1.3.7-4.3-1.3-6.2-2.2-2.3-5.2-2.6-6.5-1m-11.4-14.7c-1.6 1-1.6 3.6 0 5.9s4.3 3.3 5.6 2.3c1.6-1.3 1.6-3.9 0-6.2-1.4-2.3-4-3.3-5.6-2"/></svg> </a> <a href="https://www.linkedin.com/in/nielslohmann/" target="_blank" rel="noopener" title="www.linkedin.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 448 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path d="M416 32H31.9C14.3 32 0 46.5 0 64.3v383.4C0 465.5 14.3 480 31.9 480H416c17.6 0 32-14.5 32-32.3V64.3c0-17.8-14.4-32.3-32-32.3M135.4 416H69V202.2h66.5V416zM102.2 96a38.5 38.5 0 1 1 0 77 38.5 38.5 0 1 1 0-77m282.1 320h-66.4V312c0-24.8-.5-56.7-34.5-56.7-34.6 0-39.9 27-39.9 54.9V416h-66.4V202.2h63.7v29.2h.9c8.9-16.8 30.6-34.5 62.9-34.5 67.2 0 79.7 44.3 79.7 101.9z"/></svg> </a> <a href="https://www.xing.com/profile/Niels_Lohmann" target="_blank" rel="noopener" title="www.xing.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 384 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path d="M162.7 210c-1.8 3.3Line truncated
|
||||
</code></pre></div> </details> <h2 id=version-history>Version history<a class=headerlink href=#version-history title="Permanent link">¶</a></h2> <ol> <li>Added in version 2.1.0. Added C++20 member functions in version 3.11.2.</li> <li>Added for backward compatibility and deprecated in version 3.11.2.</li> </ol> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="July 8, 2026 18:18:24 UTC">July 8, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path d="M173.9 397.4c0 2-2.3 3.6-5.2 3.6-3.3.3-5.6-1.3-5.6-3.6 0-2 2.3-3.6 5.2-3.6 3-.3 5.6 1.3 5.6 3.6m-31.1-4.5c-.7 2 1.3 4.3 4.3 4.9 2.6 1 5.6 0 6.2-2s-1.3-4.3-4.3-5.2c-2.6-.7-5.5.3-6.2 2.3m44.2-1.7c-2.9.7-4.9 2.6-4.6 4.9.3 2 2.9 3.3 5.9 2.6 2.9-.7 4.9-2.6 4.6-4.6-.3-1.9-3-3.2-5.9-2.9M252.8 8C114.1 8 8 113.3 8 252c0 110.9 69.8 205.8 169.5 239.2 12.8 2.3 17.3-5.6 17.3-12.1 0-6.2-.3-40.4-.3-61.4 0 0-70 15-84.7-29.8 0 0-11.4-29.1-27.8-36.6 0 0-22.9-15.7 1.6-15.4 0 0 24.9 2 38.6 25.8 21.9 38.6 58.6 27.5 72.9 20.9 2.3-16 8.8-27.1 16-33.7-55.9-6.2-112.3-14.3-112.3-110.5 0-27.5 7.6-41.3 23.6-58.9-2.6-6.5-11.1-33.3 2.6-67.9 20.9-6.5 69 27 69 27 20-5.6 41.5-8.5 62.8-8.5s42.8 2.9 62.8 8.5c0 0 48.1-33.6 69-27 13.7 34.7 5.2 61.4 2.6 67.9 16 17.7 25.8 31.5 25.8 58.9 0 96.5-58.9 104.2-114.8 110.5 9.2 7.9 17 22.9 17 46.4 0 33.7-.3 75.4-.3 83.6 0 6.5 4.6 14.4 17.3 12.1C436.2 457.8 504 362.9 504 252 504 113.3 391.5 8 252.8 8M105.2 352.9c-1.3 1-1 3.3.7 5.2 1.6 1.6 3.9 2.3 5.2 1 1.3-1 1-3.3-.7-5.2-1.6-1.6-3.9-2.3-5.2-1m-10.8-8.1c-.7 1.3.3 2.9 2.3 3.9 1.6 1 3.6.7 4.3-.7.7-1.3-.3-2.9-2.3-3.9-2-.6-3.6-.3-4.3.7m32.4 35.6c-1.6 1.3-1 4.3 1.3 6.2 2.3 2.3 5.2 2.6 6.5 1 1.3-1.3.7-4.3-1.3-6.2-2.2-2.3-5.2-2.6-6.5-1m-11.4-14.7c-1.6 1-1.6 3.6 0 5.9s4.3 3.3 5.6 2.3c1.6-1.3 1.6-3.9 0-6.2-1.4-2.3-4-3.3-5.6-2"/></svg> </a> <a href="https://www.linkedin.com/in/nielslohmann/" target="_blank" rel="noopener" title="www.linkedin.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 448 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path d="M416 32H31.9C14.3 32 0 46.5 0 64.3v383.4C0 465.5 14.3 480 31.9 480H416c17.6 0 32-14.5 32-32.3V64.3c0-17.8-14.4-32.3-32-32.3M135.4 416H69V202.2h66.5V416zM102.2 96a38.5 38.5 0 1 1 0 77 38.5 38.5 0 1 1 0-77m282.1 320h-66.4V312c0-24.8-.5-56.7-34.5-56.7-34.6 0-39.9 27-39.9 54.9V416h-66.4V202.2h63.7v29.2h.9c8.9-16.8 30.6-34.5 62.9-34.5 67.2 0 79.7 44.3 79.7 101.9z"/></svg> </a> <a href="https://www.xing.com/profile/Niels_Lohmann" target="_blank" rel="noopener" title="www.xing.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 384 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path d="M162.7 210c-1.8 3.3Line truncated
|
||||
@@ -0,0 +1,160 @@
|
||||
# nlohmann::json_pointer::operator==
|
||||
|
||||
```
|
||||
// until C++20
|
||||
template<typename RefStringTypeLhs, typename RefStringTypeRhs>
|
||||
bool operator==(
|
||||
const json_pointer<RefStringTypeLhs>& lhs,
|
||||
const json_pointer<RefStringTypeRhs>& rhs) noexcept; // (1)
|
||||
|
||||
template<typename RefStringTypeLhs, typename StringType>
|
||||
bool operator==(
|
||||
const json_pointer<RefStringTypeLhs>& lhs,
|
||||
const StringType& rhs); // (2)
|
||||
|
||||
template<typename RefStringTypeRhs, typename StringType>
|
||||
bool operator==(
|
||||
const StringType& lhs,
|
||||
const json_pointer<RefStringTypeRhs>& rhs); // (2)
|
||||
|
||||
// since C++20
|
||||
class json_pointer {
|
||||
template<typename RefStringTypeRhs>
|
||||
bool operator==(
|
||||
const json_pointer<RefStringTypeRhs>& rhs) const noexcept; // (1)
|
||||
|
||||
bool operator==(const string_t& rhs) const; // (2)
|
||||
};
|
||||
```
|
||||
|
||||
1. Compares two JSON pointers for equality by comparing their reference tokens.
|
||||
1. Compares a JSON pointer and a string or a string and a JSON pointer for equality by converting the string to a JSON pointer and comparing the JSON pointers according to 1.
|
||||
|
||||
## Template parameters
|
||||
|
||||
`RefStringTypeLhs`, `RefStringTypeRhs` : the string type of the left-hand side or right-hand side JSON pointer, respectively
|
||||
|
||||
`StringType` : the string type derived from the `json_pointer` operand ([`json_pointer::string_t`](https://json.nlohmann.me/api/json_pointer/string_t/index.md))
|
||||
|
||||
## Parameters
|
||||
|
||||
`lhs` (in) : first value to consider
|
||||
|
||||
`rhs` (in) : second value to consider
|
||||
|
||||
## Return value
|
||||
|
||||
whether the values `lhs`/`*this` and `rhs` are equal
|
||||
|
||||
## Exception safety
|
||||
|
||||
1. No-throw guarantee: this function never throws exceptions.
|
||||
1. Strong exception safety: if an exception occurs, the original value stays intact.
|
||||
|
||||
## Exceptions
|
||||
|
||||
1. (none)
|
||||
1. The function can throw the following exceptions:
|
||||
1. Throws [parse_error.107](https://json.nlohmann.me/home/exceptions/#jsonexceptionparse_error107) if the given JSON pointer `s` is nonempty and does not begin with a slash (`/`); see example below.
|
||||
1. Throws [parse_error.108](https://json.nlohmann.me/home/exceptions/#jsonexceptionparse_error108) if a tilde (`~`) in the given JSON pointer `s` is not followed by `0` (representing `~`) or `1` (representing `/`); see example below.
|
||||
|
||||
## Complexity
|
||||
|
||||
Constant if `lhs` and `rhs` differ in the number of reference tokens, otherwise linear in the number of reference tokens.
|
||||
|
||||
## Notes
|
||||
|
||||
Deprecation
|
||||
|
||||
Overload 2 is deprecated and will be removed in a future major version release.
|
||||
|
||||
## Examples
|
||||
|
||||
Example: (1) Comparing JSON pointers
|
||||
|
||||
The example demonstrates comparing JSON pointers.
|
||||
|
||||
```
|
||||
#include <iostream>
|
||||
#include <nlohmann/json.hpp>
|
||||
|
||||
using json = nlohmann::json;
|
||||
|
||||
int main()
|
||||
{
|
||||
// different JSON pointers
|
||||
json::json_pointer ptr0;
|
||||
json::json_pointer ptr1("");
|
||||
json::json_pointer ptr2("/foo");
|
||||
|
||||
// compare JSON pointers
|
||||
std::cout << std::boolalpha
|
||||
<< "\"" << ptr0 << "\" == \"" << ptr0 << "\": " << (ptr0 == ptr0) << '\n'
|
||||
<< "\"" << ptr0 << "\" == \"" << ptr1 << "\": " << (ptr0 == ptr1) << '\n'
|
||||
<< "\"" << ptr1 << "\" == \"" << ptr2 << "\": " << (ptr1 == ptr2) << '\n'
|
||||
<< "\"" << ptr2 << "\" == \"" << ptr2 << "\": " << (ptr2 == ptr2) << std::endl;
|
||||
}
|
||||
```
|
||||
|
||||
Output:
|
||||
|
||||
```
|
||||
"" == "": true
|
||||
"" == "": true
|
||||
"" == "/foo": false
|
||||
"/foo" == "/foo": true
|
||||
```
|
||||
|
||||
Example: (2) Comparing JSON pointers and strings
|
||||
|
||||
The example demonstrates comparing JSON pointers and strings, and when doing so may raise an exception.
|
||||
|
||||
```
|
||||
#include <exception>
|
||||
#include <iostream>
|
||||
#include <nlohmann/json.hpp>
|
||||
|
||||
using json = nlohmann::json;
|
||||
|
||||
int main()
|
||||
{
|
||||
// different JSON pointers
|
||||
json::json_pointer ptr0;
|
||||
json::json_pointer ptr1("");
|
||||
json::json_pointer ptr2("/foo");
|
||||
|
||||
// different strings
|
||||
std::string str0("");
|
||||
std::string str1("/foo");
|
||||
std::string str2("bar");
|
||||
|
||||
// compare JSON pointers and strings
|
||||
std::cout << std::boolalpha
|
||||
<< "\"" << ptr0 << "\" == \"" << str0 << "\": " << (ptr0 == str0) << '\n'
|
||||
<< "\"" << str0 << "\" == \"" << ptr1 << "\": " << (str0 == ptr1) << '\n'
|
||||
<< "\"" << ptr2 << "\" == \"" << str1 << "\": " << (ptr2 == str1) << std::endl;
|
||||
|
||||
try
|
||||
{
|
||||
std::cout << "\"" << str2 << "\" == \"" << ptr2 << "\": " << (str2 == ptr2) << std::endl;
|
||||
}
|
||||
catch (const json::parse_error& ex)
|
||||
{
|
||||
std::cout << ex.what() << std::endl;
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
Output:
|
||||
|
||||
```
|
||||
"" == "": true
|
||||
"" == "": true
|
||||
"/foo" == "/foo": true
|
||||
"bar" == "/foo": [json.exception.parse_error.107] parse error at byte 1: JSON pointer must be empty or begin with '/' - was: 'bar'
|
||||
```
|
||||
|
||||
## Version history
|
||||
|
||||
1. Added in version 2.1.0. Added C++20 member functions in version 3.11.2.
|
||||
1. Added for backward compatibility and deprecated in version 3.11.2.
|
||||
@@ -0,0 +1,109 @@
|
||||
# <small>nlohmann::json_pointer::</small>operator!=
|
||||
|
||||
```cpp
|
||||
// until C++20
|
||||
template<typename RefStringTypeLhs, typename RefStringTypeRhs>
|
||||
bool operator!=(
|
||||
const json_pointer<RefStringTypeLhs>& lhs,
|
||||
const json_pointer<RefStringTypeRhs>& rhs) noexcept; // (1)
|
||||
|
||||
template<typename RefStringTypeLhs, typename StringType>
|
||||
bool operator!=(
|
||||
const json_pointer<RefStringTypeLhs>& lhs,
|
||||
const StringType& rhs); // (2)
|
||||
|
||||
template<typename RefStringTypeRhs, typename StringType>
|
||||
bool operator!=(
|
||||
const StringType& lhs,
|
||||
const json_pointer<RefStringTypeRhs>& rhs); // (2)
|
||||
```
|
||||
|
||||
1. Compares two JSON pointers for inequality by comparing their reference tokens.
|
||||
|
||||
2. Compares a JSON pointer and a string or a string and a JSON pointer for inequality by converting the string to a
|
||||
JSON pointer and comparing the JSON pointers according to 1.
|
||||
|
||||
## Template parameters
|
||||
|
||||
`RefStringTypeLhs`, `RefStringTypeRhs`
|
||||
: the string type of the left-hand side or right-hand side JSON pointer, respectively
|
||||
|
||||
`StringType`
|
||||
: the string type derived from the `json_pointer` operand ([`json_pointer::string_t`](string_t.md))
|
||||
|
||||
## Parameters
|
||||
|
||||
`lhs` (in)
|
||||
: first value to consider
|
||||
|
||||
`rhs` (in)
|
||||
: second value to consider
|
||||
|
||||
## Return value
|
||||
|
||||
whether the values `lhs`/`*this` and `rhs` are not equal
|
||||
|
||||
## Exception safety
|
||||
|
||||
1. No-throw guarantee: this function never throws exceptions.
|
||||
2. Strong exception safety: if an exception occurs, the original value stays intact.
|
||||
|
||||
## Exceptions
|
||||
|
||||
1. (none)
|
||||
2. The function can throw the following exceptions:
|
||||
- Throws [parse_error.107](../../home/exceptions.md#jsonexceptionparse_error107) if the given JSON pointer `s` is
|
||||
nonempty and does not begin with a slash (`/`); see example below.
|
||||
- Throws [parse_error.108](../../home/exceptions.md#jsonexceptionparse_error108) if a tilde (`~`) in the given JSON
|
||||
pointer `s` is not followed by `0` (representing `~`) or `1` (representing `/`); see example below.
|
||||
|
||||
## Complexity
|
||||
|
||||
Constant if `lhs` and `rhs` differ in the number of reference tokens, otherwise linear in the number of reference
|
||||
tokens.
|
||||
|
||||
## Notes
|
||||
|
||||
!!! note "Operator overload resolution"
|
||||
|
||||
Since C++20 overload resolution will consider the _rewritten candidate_ generated from
|
||||
[`operator==`](operator_eq.md).
|
||||
|
||||
!!! warning "Deprecation"
|
||||
|
||||
Overload 2 is deprecated and will be removed in a future major version release.
|
||||
|
||||
## Examples
|
||||
|
||||
??? example "Example: (1) Comparing JSON pointers"
|
||||
|
||||
The example demonstrates comparing JSON pointers.
|
||||
|
||||
```cpp
|
||||
--8<-- "examples/json_pointer__operator__notequal.cpp"
|
||||
```
|
||||
|
||||
Output:
|
||||
|
||||
```
|
||||
--8<-- "examples/json_pointer__operator__notequal.output"
|
||||
```
|
||||
|
||||
??? example "Example: (2) Comparing JSON pointers and strings"
|
||||
|
||||
The example demonstrates comparing JSON pointers and strings, and when doing so may raise an exception.
|
||||
|
||||
```cpp
|
||||
--8<-- "examples/json_pointer__operator__notequal_stringtype.cpp"
|
||||
```
|
||||
|
||||
Output:
|
||||
|
||||
```
|
||||
--8<-- "examples/json_pointer__operator__notequal_stringtype.output"
|
||||
```
|
||||
|
||||
## Version history
|
||||
|
||||
1. Added in version 2.1.0.
|
||||
2. Added for backward compatibility and deprecated in version 3.11.2.
|
||||
@@ -72,4 +72,4 @@
|
||||
"" != "": false
|
||||
"/foo" != "/foo": false
|
||||
"bar" != "/foo": [json.exception.parse_error.107] parse error at byte 1: JSON pointer must be empty or begin with '/' - was: 'bar'
|
||||
</code></pre></div> </details> <h2 id=version-history>Version history<a class=headerlink href=#version-history title="Permanent link">¶</a></h2> <ol> <li>Added in version 2.1.0.</li> <li>Added for backward compatibility and deprecated in version 3.11.2.</li> </ol> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="July 4, 2026 09:13:25 UTC">July 4, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - 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|
||||
</code></pre></div> </details> <h2 id=version-history>Version history<a class=headerlink href=#version-history title="Permanent link">¶</a></h2> <ol> <li>Added in version 2.1.0.</li> <li>Added for backward compatibility and deprecated in version 3.11.2.</li> </ol> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="July 8, 2026 18:18:24 UTC">July 8, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - 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|
||||
@@ -0,0 +1,154 @@
|
||||
# nlohmann::json_pointer::operator!=
|
||||
|
||||
```
|
||||
// until C++20
|
||||
template<typename RefStringTypeLhs, typename RefStringTypeRhs>
|
||||
bool operator!=(
|
||||
const json_pointer<RefStringTypeLhs>& lhs,
|
||||
const json_pointer<RefStringTypeRhs>& rhs) noexcept; // (1)
|
||||
|
||||
template<typename RefStringTypeLhs, typename StringType>
|
||||
bool operator!=(
|
||||
const json_pointer<RefStringTypeLhs>& lhs,
|
||||
const StringType& rhs); // (2)
|
||||
|
||||
template<typename RefStringTypeRhs, typename StringType>
|
||||
bool operator!=(
|
||||
const StringType& lhs,
|
||||
const json_pointer<RefStringTypeRhs>& rhs); // (2)
|
||||
```
|
||||
|
||||
1. Compares two JSON pointers for inequality by comparing their reference tokens.
|
||||
1. Compares a JSON pointer and a string or a string and a JSON pointer for inequality by converting the string to a JSON pointer and comparing the JSON pointers according to 1.
|
||||
|
||||
## Template parameters
|
||||
|
||||
`RefStringTypeLhs`, `RefStringTypeRhs` : the string type of the left-hand side or right-hand side JSON pointer, respectively
|
||||
|
||||
`StringType` : the string type derived from the `json_pointer` operand ([`json_pointer::string_t`](https://json.nlohmann.me/api/json_pointer/string_t/index.md))
|
||||
|
||||
## Parameters
|
||||
|
||||
`lhs` (in) : first value to consider
|
||||
|
||||
`rhs` (in) : second value to consider
|
||||
|
||||
## Return value
|
||||
|
||||
whether the values `lhs`/`*this` and `rhs` are not equal
|
||||
|
||||
## Exception safety
|
||||
|
||||
1. No-throw guarantee: this function never throws exceptions.
|
||||
1. Strong exception safety: if an exception occurs, the original value stays intact.
|
||||
|
||||
## Exceptions
|
||||
|
||||
1. (none)
|
||||
1. The function can throw the following exceptions:
|
||||
1. Throws [parse_error.107](https://json.nlohmann.me/home/exceptions/#jsonexceptionparse_error107) if the given JSON pointer `s` is nonempty and does not begin with a slash (`/`); see example below.
|
||||
1. Throws [parse_error.108](https://json.nlohmann.me/home/exceptions/#jsonexceptionparse_error108) if a tilde (`~`) in the given JSON pointer `s` is not followed by `0` (representing `~`) or `1` (representing `/`); see example below.
|
||||
|
||||
## Complexity
|
||||
|
||||
Constant if `lhs` and `rhs` differ in the number of reference tokens, otherwise linear in the number of reference tokens.
|
||||
|
||||
## Notes
|
||||
|
||||
Operator overload resolution
|
||||
|
||||
Since C++20 overload resolution will consider the *rewritten candidate* generated from [`operator==`](https://json.nlohmann.me/api/json_pointer/operator_eq/index.md).
|
||||
|
||||
Deprecation
|
||||
|
||||
Overload 2 is deprecated and will be removed in a future major version release.
|
||||
|
||||
## Examples
|
||||
|
||||
Example: (1) Comparing JSON pointers
|
||||
|
||||
The example demonstrates comparing JSON pointers.
|
||||
|
||||
```
|
||||
#include <iostream>
|
||||
#include <nlohmann/json.hpp>
|
||||
|
||||
using json = nlohmann::json;
|
||||
|
||||
int main()
|
||||
{
|
||||
// different JSON pointers
|
||||
json::json_pointer ptr0;
|
||||
json::json_pointer ptr1("");
|
||||
json::json_pointer ptr2("/foo");
|
||||
|
||||
// compare JSON pointers
|
||||
std::cout << std::boolalpha
|
||||
<< "\"" << ptr0 << "\" != \"" << ptr0 << "\": " << (ptr0 != ptr0) << '\n'
|
||||
<< "\"" << ptr0 << "\" != \"" << ptr1 << "\": " << (ptr0 != ptr1) << '\n'
|
||||
<< "\"" << ptr1 << "\" != \"" << ptr2 << "\": " << (ptr1 != ptr2) << '\n'
|
||||
<< "\"" << ptr2 << "\" != \"" << ptr2 << "\": " << (ptr2 != ptr2) << std::endl;
|
||||
}
|
||||
```
|
||||
|
||||
Output:
|
||||
|
||||
```
|
||||
"" != "": false
|
||||
"" != "": false
|
||||
"" != "/foo": true
|
||||
"/foo" != "/foo": false
|
||||
```
|
||||
|
||||
Example: (2) Comparing JSON pointers and strings
|
||||
|
||||
The example demonstrates comparing JSON pointers and strings, and when doing so may raise an exception.
|
||||
|
||||
```
|
||||
#include <iostream>
|
||||
#include <nlohmann/json.hpp>
|
||||
|
||||
using json = nlohmann::json;
|
||||
|
||||
int main()
|
||||
{
|
||||
// different JSON pointers
|
||||
json::json_pointer ptr0;
|
||||
json::json_pointer ptr1("");
|
||||
json::json_pointer ptr2("/foo");
|
||||
|
||||
// different strings
|
||||
std::string str0("");
|
||||
std::string str1("/foo");
|
||||
std::string str2("bar");
|
||||
|
||||
// compare JSON pointers and strings
|
||||
std::cout << std::boolalpha
|
||||
<< "\"" << ptr0 << "\" != \"" << str0 << "\": " << (ptr0 != str0) << '\n'
|
||||
<< "\"" << str0 << "\" != \"" << ptr1 << "\": " << (str0 != ptr1) << '\n'
|
||||
<< "\"" << ptr2 << "\" != \"" << str1 << "\": " << (ptr2 != str1) << std::endl;
|
||||
|
||||
try
|
||||
{
|
||||
std::cout << "\"" << str2 << "\" != \"" << ptr2 << "\": " << (str2 != ptr2) << std::endl;
|
||||
}
|
||||
catch (const json::parse_error& ex)
|
||||
{
|
||||
std::cout << ex.what() << std::endl;
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
Output:
|
||||
|
||||
```
|
||||
"" != "": false
|
||||
"" != "": false
|
||||
"/foo" != "/foo": false
|
||||
"bar" != "/foo": [json.exception.parse_error.107] parse error at byte 1: JSON pointer must be empty or begin with '/' - was: 'bar'
|
||||
```
|
||||
|
||||
## Version history
|
||||
|
||||
1. Added in version 2.1.0.
|
||||
1. Added for backward compatibility and deprecated in version 3.11.2.
|
||||
@@ -0,0 +1,64 @@
|
||||
# <small>nlohmann::json_pointer::</small>operator/
|
||||
|
||||
```cpp
|
||||
// (1)
|
||||
json_pointer operator/(const json_pointer& lhs, const json_pointer& rhs);
|
||||
|
||||
// (2)
|
||||
json_pointer operator/(const json_pointer& lhs, string_t token);
|
||||
|
||||
// (3)
|
||||
json_pointer operator/(const json_pointer& lhs, std::size_t array_idx);
|
||||
```
|
||||
|
||||
1. create a new JSON pointer by appending the right JSON pointer at the end of the left JSON pointer
|
||||
2. create a new JSON pointer by appending the unescaped token at the end of the JSON pointer
|
||||
3. create a new JSON pointer by appending the array-index-token at the end of the JSON pointer
|
||||
|
||||
## Parameters
|
||||
|
||||
`lhs` (in)
|
||||
: JSON pointer
|
||||
|
||||
`rhs` (in)
|
||||
: JSON pointer to append
|
||||
|
||||
`token` (in)
|
||||
: reference token to append
|
||||
|
||||
`array_idx` (in)
|
||||
: array index to append
|
||||
|
||||
## Return value
|
||||
|
||||
1. a new JSON pointer with `rhs` appended to `lhs`
|
||||
2. a new JSON pointer with unescaped `token` appended to `lhs`
|
||||
3. a new JSON pointer with `array_idx` appended to `lhs`
|
||||
|
||||
## Complexity
|
||||
|
||||
1. Linear in the length of `lhs` and `rhs`.
|
||||
2. Linear in the length of `lhs`.
|
||||
3. Linear in the length of `lhs`.
|
||||
|
||||
## Examples
|
||||
|
||||
??? example
|
||||
|
||||
The example shows the usage of `operator/`.
|
||||
|
||||
```cpp
|
||||
--8<-- "examples/json_pointer__operator_add_binary.cpp"
|
||||
```
|
||||
|
||||
Output:
|
||||
|
||||
```json
|
||||
--8<-- "examples/json_pointer__operator_add_binary.output"
|
||||
```
|
||||
|
||||
## Version history
|
||||
|
||||
1. Added in version 3.6.0.
|
||||
2. Added in version 3.6.0. Changed type of `token` to `string_t` in version 3.11.0.
|
||||
3. Added in version 3.6.0.
|
||||
@@ -28,4 +28,4 @@
|
||||
</code></pre></div> <p>Output:</p> <div class=highlight><pre><span></span><code><span class=s2>"/foo/bar/baz"</span>
|
||||
<span class=s2>"/foo/fob"</span>
|
||||
<span class=s2>"/foo/42"</span>
|
||||
</code></pre></div> </details> <h2 id=version-history>Version history<a class=headerlink href=#version-history title="Permanent link">¶</a></h2> <ol> <li>Added in version 3.6.0.</li> <li>Added in version 3.6.0. Changed type of <code>token</code> to <code>string_t</code> in version 3.11.0.</li> <li>Added in version 3.6.0.</li> </ol> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="July 4, 2026 09:13:25 UTC">July 4, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path d="M173.9 397.4c0 2-2.3 3.6-5.2 3.6-3.3.3-5.6-1.3-5.6-3.6 0-2 2.3-3.6 5.2-3.6 3-.3 5.6 1.3 5.6 3.6m-31.1-4.5c-.7 2 1.3 4.3 4.3 4.9 2.6 1 5.6 0 6.2-2s-1.3-4.3-4.3-5.2c-2.6-.7-5.5.3-6.2 2.3m44.2-1.7c-2.9.7-4.9 2.6-4.6 4.9.3 2 2.9 3.3 5.9 2.6 2.9-.7 4.9-2.6 4.6-4.6-.3-1.9-3-3.2-5.9-2.9M252.8 8C114.1 8 8 113.3 8 252c0 110.9 69.8 205.8 169.5 239.2 12.8 2.3 17.3-5.6 17.3-12.1 0-6.2-.3-40.4-.3-61.4 0 0-70 15-84.7-29.8 0 0-11.4-29.1-27.8-36.6 0 0-22.9-15.7 1.6-15.4 0 0 24.9 2 38.6 25.8 21.9 38.6 58.6 27.5 72.9 20.9 2.3-16 8.8-27.1 16-33.7-55.9-6.2-112.3-14.3-112.3-110.5 0-27.5 7.6-41.3 23.6-58.9-2.6-6.5-11.1-33.3 2.6-67.9 20.9-6.5 69 27 69 27 20-5.6 41.5-8.5 62.8-8.5s42.8 2.9 62.8 8.5c0 0 48.1-33.6 69-27 13.7 34.7 5.2 61.4 2.6 67.9 16 17.7 25.8 31.5 25.8 58.9 0 96.5-58.9 104.2-114.8 110.5 9.2 7.9 17 22.9 17 46.4 0 33.7-.3 75.4-.3 83.6 0 6.5 4.6 14.4 17.3 12.1C436.2 457.8 504 362.9 504 252 504 113.3 391.5 8 252.8 8M105.2 352.9c-1.3 1-1 3.3.7 5.2 1.6 1.6 3.9 2.3 5.2 1 1.3-1 1-3.3-.7-5.2-1.6-1.6-3.9-2.3-5.2-1m-10.8-8.1c-.7 1.3.3 2.9 2.3 3.9 1.6 1 3.6.7 4.3-.7.7-1.3-.3-2.9-2.3-3.9-2-.6-3.6-.3-4.3.7m32.4 35.6c-1.6 1.3-1 4.3 1.3 6.2 2.3 2.3 5.2 2.6 6.5 1 1.3-1.3.7-4.3-1.3-6.2-2.2-2.3-5.2-2.6-6.5-1m-11.4-14.7c-1.6 1-1.6 3.6 0 5.9s4.3 3.3 5.6 2.3c1.6-1.3 1.6-3.9 0-6.2-1.4-2.3-4-3.3-5.6-2"/></svg> </a> <a href="https://www.linkedin.com/in/nielslohmann/" target="_blank" rel="noopener" title="www.linkedin.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 448 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path d="M416 32H31.9C14.3 32 0 46.5 0 64.3v383.4C0 465.5 14.3 480 31.9 480H416c17.6 0 32-14.5 32-32.3V64.3c0-17.8-14.4-32.3-32-32.3M135.4 416H69V202.2h66.5V416zM102.2 96a38.5 38.5 0 1 1 0 77 38.5 38.5 0 1 1 0-77m282.1 320h-66.4V312c0-24.8-.5-56.7-34.5-56.7-34.6 0-39.9 27-39.9 54.9V416h-66.4V202.2h63.7v29.2h.9c8.9-16.8 30.6-34.5 62.9-34.5 67.2 0 79.7 44.3 79.7 101.9z"/></svg> </a> <a href="https://www.xing.com/profile/Niels_Lohmann" target="_blank" rel="noopener" title="www.xing.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 384 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path dLine truncated
|
||||
</code></pre></div> </details> <h2 id=version-history>Version history<a class=headerlink href=#version-history title="Permanent link">¶</a></h2> <ol> <li>Added in version 3.6.0.</li> <li>Added in version 3.6.0. Changed type of <code>token</code> to <code>string_t</code> in version 3.11.0.</li> <li>Added in version 3.6.0.</li> </ol> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="July 8, 2026 18:18:24 UTC">July 8, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path d="M173.9 397.4c0 2-2.3 3.6-5.2 3.6-3.3.3-5.6-1.3-5.6-3.6 0-2 2.3-3.6 5.2-3.6 3-.3 5.6 1.3 5.6 3.6m-31.1-4.5c-.7 2 1.3 4.3 4.3 4.9 2.6 1 5.6 0 6.2-2s-1.3-4.3-4.3-5.2c-2.6-.7-5.5.3-6.2 2.3m44.2-1.7c-2.9.7-4.9 2.6-4.6 4.9.3 2 2.9 3.3 5.9 2.6 2.9-.7 4.9-2.6 4.6-4.6-.3-1.9-3-3.2-5.9-2.9M252.8 8C114.1 8 8 113.3 8 252c0 110.9 69.8 205.8 169.5 239.2 12.8 2.3 17.3-5.6 17.3-12.1 0-6.2-.3-40.4-.3-61.4 0 0-70 15-84.7-29.8 0 0-11.4-29.1-27.8-36.6 0 0-22.9-15.7 1.6-15.4 0 0 24.9 2 38.6 25.8 21.9 38.6 58.6 27.5 72.9 20.9 2.3-16 8.8-27.1 16-33.7-55.9-6.2-112.3-14.3-112.3-110.5 0-27.5 7.6-41.3 23.6-58.9-2.6-6.5-11.1-33.3 2.6-67.9 20.9-6.5 69 27 69 27 20-5.6 41.5-8.5 62.8-8.5s42.8 2.9 62.8 8.5c0 0 48.1-33.6 69-27 13.7 34.7 5.2 61.4 2.6 67.9 16 17.7 25.8 31.5 25.8 58.9 0 96.5-58.9 104.2-114.8 110.5 9.2 7.9 17 22.9 17 46.4 0 33.7-.3 75.4-.3 83.6 0 6.5 4.6 14.4 17.3 12.1C436.2 457.8 504 362.9 504 252 504 113.3 391.5 8 252.8 8M105.2 352.9c-1.3 1-1 3.3.7 5.2 1.6 1.6 3.9 2.3 5.2 1 1.3-1 1-3.3-.7-5.2-1.6-1.6-3.9-2.3-5.2-1m-10.8-8.1c-.7 1.3.3 2.9 2.3 3.9 1.6 1 3.6.7 4.3-.7.7-1.3-.3-2.9-2.3-3.9-2-.6-3.6-.3-4.3.7m32.4 35.6c-1.6 1.3-1 4.3 1.3 6.2 2.3 2.3 5.2 2.6 6.5 1 1.3-1.3.7-4.3-1.3-6.2-2.2-2.3-5.2-2.6-6.5-1m-11.4-14.7c-1.6 1-1.6 3.6 0 5.9s4.3 3.3 5.6 2.3c1.6-1.3 1.6-3.9 0-6.2-1.4-2.3-4-3.3-5.6-2"/></svg> </a> <a href="https://www.linkedin.com/in/nielslohmann/" target="_blank" rel="noopener" title="www.linkedin.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 448 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path d="M416 32H31.9C14.3 32 0 46.5 0 64.3v383.4C0 465.5 14.3 480 31.9 480H416c17.6 0 32-14.5 32-32.3V64.3c0-17.8-14.4-32.3-32-32.3M135.4 416H69V202.2h66.5V416zM102.2 96a38.5 38.5 0 1 1 0 77 38.5 38.5 0 1 1 0-77m282.1 320h-66.4V312c0-24.8-.5-56.7-34.5-56.7-34.6 0-39.9 27-39.9 54.9V416h-66.4V202.2h63.7v29.2h.9c8.9-16.8 30.6-34.5 62.9-34.5 67.2 0 79.7 44.3 79.7 101.9z"/></svg> </a> <a href="https://www.xing.com/profile/Niels_Lohmann" target="_blank" rel="noopener" title="www.xing.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 384 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path dLine truncated
|
||||
@@ -0,0 +1,80 @@
|
||||
# nlohmann::json_pointer::operator/
|
||||
|
||||
```
|
||||
// (1)
|
||||
json_pointer operator/(const json_pointer& lhs, const json_pointer& rhs);
|
||||
|
||||
// (2)
|
||||
json_pointer operator/(const json_pointer& lhs, string_t token);
|
||||
|
||||
// (3)
|
||||
json_pointer operator/(const json_pointer& lhs, std::size_t array_idx);
|
||||
```
|
||||
|
||||
1. create a new JSON pointer by appending the right JSON pointer at the end of the left JSON pointer
|
||||
1. create a new JSON pointer by appending the unescaped token at the end of the JSON pointer
|
||||
1. create a new JSON pointer by appending the array-index-token at the end of the JSON pointer
|
||||
|
||||
## Parameters
|
||||
|
||||
`lhs` (in) : JSON pointer
|
||||
|
||||
`rhs` (in) : JSON pointer to append
|
||||
|
||||
`token` (in) : reference token to append
|
||||
|
||||
`array_idx` (in) : array index to append
|
||||
|
||||
## Return value
|
||||
|
||||
1. a new JSON pointer with `rhs` appended to `lhs`
|
||||
1. a new JSON pointer with unescaped `token` appended to `lhs`
|
||||
1. a new JSON pointer with `array_idx` appended to `lhs`
|
||||
|
||||
## Complexity
|
||||
|
||||
1. Linear in the length of `lhs` and `rhs`.
|
||||
1. Linear in the length of `lhs`.
|
||||
1. Linear in the length of `lhs`.
|
||||
|
||||
## Examples
|
||||
|
||||
Example
|
||||
|
||||
The example shows the usage of `operator/`.
|
||||
|
||||
```
|
||||
#include <iostream>
|
||||
#include <nlohmann/json.hpp>
|
||||
|
||||
using json = nlohmann::json;
|
||||
|
||||
int main()
|
||||
{
|
||||
// create a JSON pointer
|
||||
json::json_pointer ptr("/foo");
|
||||
|
||||
// append a JSON Pointer
|
||||
std::cout << "\"" << ptr / json::json_pointer("/bar/baz") << "\"\n";
|
||||
|
||||
// append a string
|
||||
std::cout << "\"" << ptr / "fob" << "\"\n";
|
||||
|
||||
// append an array index
|
||||
std::cout << "\"" << ptr / 42 << "\"" << std::endl;
|
||||
}
|
||||
```
|
||||
|
||||
Output:
|
||||
|
||||
```
|
||||
"/foo/bar/baz"
|
||||
"/foo/fob"
|
||||
"/foo/42"
|
||||
```
|
||||
|
||||
## Version history
|
||||
|
||||
1. Added in version 3.6.0.
|
||||
1. Added in version 3.6.0. Changed type of `token` to `string_t` in version 3.11.0.
|
||||
1. Added in version 3.6.0.
|
||||
@@ -0,0 +1,61 @@
|
||||
# <small>nlohmann::json_pointer::</small>operator/=
|
||||
|
||||
```cpp
|
||||
// (1)
|
||||
json_pointer& operator/=(const json_pointer& ptr);
|
||||
|
||||
// (2)
|
||||
json_pointer& operator/=(string_t token);
|
||||
|
||||
// (3)
|
||||
json_pointer& operator/=(std::size_t array_idx)
|
||||
```
|
||||
|
||||
1. append another JSON pointer at the end of this JSON pointer
|
||||
2. append an unescaped reference token at the end of this JSON pointer
|
||||
3. append an array index at the end of this JSON pointer
|
||||
|
||||
## Parameters
|
||||
|
||||
`ptr` (in)
|
||||
: JSON pointer to append
|
||||
|
||||
`token` (in)
|
||||
: reference token to append
|
||||
|
||||
`array_idx` (in)
|
||||
: array index to append
|
||||
|
||||
## Return value
|
||||
|
||||
1. JSON pointer with `ptr` appended
|
||||
2. JSON pointer with `token` appended without escaping `token`
|
||||
3. JSON pointer with `array_idx` appended
|
||||
|
||||
## Complexity
|
||||
|
||||
1. Linear in the length of `ptr`.
|
||||
2. Amortized constant.
|
||||
3. Amortized constant.
|
||||
|
||||
## Examples
|
||||
|
||||
??? example
|
||||
|
||||
The example shows the usage of `operator/=`.
|
||||
|
||||
```cpp
|
||||
--8<-- "examples/json_pointer__operator_add.cpp"
|
||||
```
|
||||
|
||||
Output:
|
||||
|
||||
```json
|
||||
--8<-- "examples/json_pointer__operator_add.output"
|
||||
```
|
||||
|
||||
## Version history
|
||||
|
||||
1. Added in version 3.6.0.
|
||||
2. Added in version 3.6.0. Changed type of `token` to `string_t` in version 3.11.0.
|
||||
3. Added in version 3.6.0.
|
||||
@@ -33,4 +33,4 @@
|
||||
<span class=s2>"/foo/bar/baz"</span>
|
||||
<span class=s2>"/foo/bar/baz/fob"</span>
|
||||
<span class=s2>"/foo/bar/baz/fob/42"</span>
|
||||
</code></pre></div> </details> <h2 id=version-history>Version history<a class=headerlink href=#version-history title="Permanent link">¶</a></h2> <ol> <li>Added in version 3.6.0.</li> <li>Added in version 3.6.0. Changed type of <code>token</code> to <code>string_t</code> in version 3.11.0.</li> <li>Added in version 3.6.0.</li> </ol> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="July 4, 2026 09:13:25 UTC">July 4, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path d="M173.9 397.4c0 2-2.3 3.6-5.2 3.6-3.3.3-5.6-1.3-5.6-3.6 0-2 2.3-3.6 5.2-3.6 3-.3 5.6 1.3 5.6 3.6m-31.1-4.5c-.7 2 1.3 4.3 4.3 4.9 2.6 1 5.6 0 6.2-2s-1.3-4.3-4.3-5.2c-2.6-.7-5.5.3-6.2 2.3m44.2-1.7c-2.9.7-4.9 2.6-4.6 4.9.3 2 2.9 3.3 5.9 2.6 2.9-.7 4.9-2.6 4.6-4.6-.3-1.9-3-3.2-5.9-2.9M252.8 8C114.1 8 8 113.3 8 252c0 110.9 69.8 205.8 169.5 239.2 12.8 2.3 17.3-5.6 17.3-12.1 0-6.2-.3-40.4-.3-61.4 0 0-70 15-84.7-29.8 0 0-11.4-29.1-27.8-36.6 0 0-22.9-15.7 1.6-15.4 0 0 24.9 2 38.6 25.8 21.9 38.6 58.6 27.5 72.9 20.9 2.3-16 8.8-27.1 16-33.7-55.9-6.2-112.3-14.3-112.3-110.5 0-27.5 7.6-41.3 23.6-58.9-2.6-6.5-11.1-33.3 2.6-67.9 20.9-6.5 69 27 69 27 20-5.6 41.5-8.5 62.8-8.5s42.8 2.9 62.8 8.5c0 0 48.1-33.6 69-27 13.7 34.7 5.2 61.4 2.6 67.9 16 17.7 25.8 31.5 25.8 58.9 0 96.5-58.9 104.2-114.8 110.5 9.2 7.9 17 22.9 17 46.4 0 33.7-.3 75.4-.3 83.6 0 6.5 4.6 14.4 17.3 12.1C436.2 457.8 504 362.9 504 252 504 113.3 391.5 8 252.8 8M105.2 352.9c-1.3 1-1 3.3.7 5.2 1.6 1.6 3.9 2.3 5.2 1 1.3-1 1-3.3-.7-5.2-1.6-1.6-3.9-2.3-5.2-1m-10.8-8.1c-.7 1.3.3 2.9 2.3 3.9 1.6 1 3.6.7 4.3-.7.7-1.3-.3-2.9-2.3-3.9-2-.6-3.6-.3-4.3.7m32.4 35.6c-1.6 1.3-1 4.3 1.3 6.2 2.3 2.3 5.2 2.6 6.5 1 1.3-1.3.7-4.3-1.3-6.2-2.2-2.3-5.2-2.6-6.5-1m-11.4-14.7c-1.6 1-1.6 3.6 0 5.9s4.3 3.3 5.6 2.3c1.6-1.3 1.6-3.9 0-6.2-1.4-2.3-4-3.3-5.6-2"/></svg> </a> <a href="https://www.linkedin.com/in/nielslohmann/" target="_blank" rel="noopener" title="www.linkedin.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 448 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path d="M416 32H31.9C14.3 32 0 46.5 0 64.3v383.4C0 465.5 14.3 480 31.9 480H416c17.6 0 32-14.5 32-32.3V64.3c0-17.8-14.4-32.3-32-32.3M135.4 416H69V202.2h66.5V416zM102.2 96a38.5 38.5 0 1 1 0 77 38.5 38.5 0 1 1 0-77m282.1 320h-66.4V312c0-24.8-.5-56.7-34.5-56.7-34.6 0-39.9 27-39.9 54.9V416h-66.4V202.2h63.7v29.2h.9c8.9-16.8 30.6-34.5 62.9-34.5 67.2 0 79.7 44.3 79.7 101.9z"/></svg> </a> <a href="https://www.xing.com/profile/Niels_Lohmann" target="_blank" rel="noopener" title="www.xing.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 384 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path dLine truncated
|
||||
</code></pre></div> </details> <h2 id=version-history>Version history<a class=headerlink href=#version-history title="Permanent link">¶</a></h2> <ol> <li>Added in version 3.6.0.</li> <li>Added in version 3.6.0. Changed type of <code>token</code> to <code>string_t</code> in version 3.11.0.</li> <li>Added in version 3.6.0.</li> </ol> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="July 8, 2026 18:18:24 UTC">July 8, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path d="M173.9 397.4c0 2-2.3 3.6-5.2 3.6-3.3.3-5.6-1.3-5.6-3.6 0-2 2.3-3.6 5.2-3.6 3-.3 5.6 1.3 5.6 3.6m-31.1-4.5c-.7 2 1.3 4.3 4.3 4.9 2.6 1 5.6 0 6.2-2s-1.3-4.3-4.3-5.2c-2.6-.7-5.5.3-6.2 2.3m44.2-1.7c-2.9.7-4.9 2.6-4.6 4.9.3 2 2.9 3.3 5.9 2.6 2.9-.7 4.9-2.6 4.6-4.6-.3-1.9-3-3.2-5.9-2.9M252.8 8C114.1 8 8 113.3 8 252c0 110.9 69.8 205.8 169.5 239.2 12.8 2.3 17.3-5.6 17.3-12.1 0-6.2-.3-40.4-.3-61.4 0 0-70 15-84.7-29.8 0 0-11.4-29.1-27.8-36.6 0 0-22.9-15.7 1.6-15.4 0 0 24.9 2 38.6 25.8 21.9 38.6 58.6 27.5 72.9 20.9 2.3-16 8.8-27.1 16-33.7-55.9-6.2-112.3-14.3-112.3-110.5 0-27.5 7.6-41.3 23.6-58.9-2.6-6.5-11.1-33.3 2.6-67.9 20.9-6.5 69 27 69 27 20-5.6 41.5-8.5 62.8-8.5s42.8 2.9 62.8 8.5c0 0 48.1-33.6 69-27 13.7 34.7 5.2 61.4 2.6 67.9 16 17.7 25.8 31.5 25.8 58.9 0 96.5-58.9 104.2-114.8 110.5 9.2 7.9 17 22.9 17 46.4 0 33.7-.3 75.4-.3 83.6 0 6.5 4.6 14.4 17.3 12.1C436.2 457.8 504 362.9 504 252 504 113.3 391.5 8 252.8 8M105.2 352.9c-1.3 1-1 3.3.7 5.2 1.6 1.6 3.9 2.3 5.2 1 1.3-1 1-3.3-.7-5.2-1.6-1.6-3.9-2.3-5.2-1m-10.8-8.1c-.7 1.3.3 2.9 2.3 3.9 1.6 1 3.6.7 4.3-.7.7-1.3-.3-2.9-2.3-3.9-2-.6-3.6-.3-4.3.7m32.4 35.6c-1.6 1.3-1 4.3 1.3 6.2 2.3 2.3 5.2 2.6 6.5 1 1.3-1.3.7-4.3-1.3-6.2-2.2-2.3-5.2-2.6-6.5-1m-11.4-14.7c-1.6 1-1.6 3.6 0 5.9s4.3 3.3 5.6 2.3c1.6-1.3 1.6-3.9 0-6.2-1.4-2.3-4-3.3-5.6-2"/></svg> </a> <a href="https://www.linkedin.com/in/nielslohmann/" target="_blank" rel="noopener" title="www.linkedin.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 448 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path d="M416 32H31.9C14.3 32 0 46.5 0 64.3v383.4C0 465.5 14.3 480 31.9 480H416c17.6 0 32-14.5 32-32.3V64.3c0-17.8-14.4-32.3-32-32.3M135.4 416H69V202.2h66.5V416zM102.2 96a38.5 38.5 0 1 1 0 77 38.5 38.5 0 1 1 0-77m282.1 320h-66.4V312c0-24.8-.5-56.7-34.5-56.7-34.6 0-39.9 27-39.9 54.9V416h-66.4V202.2h63.7v29.2h.9c8.9-16.8 30.6-34.5 62.9-34.5 67.2 0 79.7 44.3 79.7 101.9z"/></svg> </a> <a href="https://www.xing.com/profile/Niels_Lohmann" target="_blank" rel="noopener" title="www.xing.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 384 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path dLine truncated
|
||||
@@ -0,0 +1,83 @@
|
||||
# nlohmann::json_pointer::operator/=
|
||||
|
||||
```
|
||||
// (1)
|
||||
json_pointer& operator/=(const json_pointer& ptr);
|
||||
|
||||
// (2)
|
||||
json_pointer& operator/=(string_t token);
|
||||
|
||||
// (3)
|
||||
json_pointer& operator/=(std::size_t array_idx)
|
||||
```
|
||||
|
||||
1. append another JSON pointer at the end of this JSON pointer
|
||||
1. append an unescaped reference token at the end of this JSON pointer
|
||||
1. append an array index at the end of this JSON pointer
|
||||
|
||||
## Parameters
|
||||
|
||||
`ptr` (in) : JSON pointer to append
|
||||
|
||||
`token` (in) : reference token to append
|
||||
|
||||
`array_idx` (in) : array index to append
|
||||
|
||||
## Return value
|
||||
|
||||
1. JSON pointer with `ptr` appended
|
||||
1. JSON pointer with `token` appended without escaping `token`
|
||||
1. JSON pointer with `array_idx` appended
|
||||
|
||||
## Complexity
|
||||
|
||||
1. Linear in the length of `ptr`.
|
||||
1. Amortized constant.
|
||||
1. Amortized constant.
|
||||
|
||||
## Examples
|
||||
|
||||
Example
|
||||
|
||||
The example shows the usage of `operator/=`.
|
||||
|
||||
```
|
||||
#include <iostream>
|
||||
#include <nlohmann/json.hpp>
|
||||
|
||||
using json = nlohmann::json;
|
||||
|
||||
int main()
|
||||
{
|
||||
// create a JSON pointer
|
||||
json::json_pointer ptr("/foo");
|
||||
std::cout << "\"" << ptr << "\"\n";
|
||||
|
||||
// append a JSON Pointer
|
||||
ptr /= json::json_pointer("/bar/baz");
|
||||
std::cout << "\"" << ptr << "\"\n";
|
||||
|
||||
// append a string
|
||||
ptr /= "fob";
|
||||
std::cout << "\"" << ptr << "\"\n";
|
||||
|
||||
// append an array index
|
||||
ptr /= 42;
|
||||
std::cout << "\"" << ptr << "\"" << std::endl;
|
||||
}
|
||||
```
|
||||
|
||||
Output:
|
||||
|
||||
```
|
||||
"/foo"
|
||||
"/foo/bar/baz"
|
||||
"/foo/bar/baz/fob"
|
||||
"/foo/bar/baz/fob/42"
|
||||
```
|
||||
|
||||
## Version history
|
||||
|
||||
1. Added in version 3.6.0.
|
||||
1. Added in version 3.6.0. Changed type of `token` to `string_t` in version 3.11.0.
|
||||
1. Added in version 3.6.0.
|
||||
@@ -0,0 +1,52 @@
|
||||
# <small>nlohmann::json_pointer::</small>operator string_t
|
||||
|
||||
```cpp
|
||||
operator string_t() const
|
||||
```
|
||||
|
||||
Return a string representation of the JSON pointer.
|
||||
|
||||
## Return value
|
||||
|
||||
A string representation of the JSON pointer
|
||||
|
||||
## Possible implementation
|
||||
|
||||
```cpp
|
||||
operator string_t() const
|
||||
{
|
||||
return to_string();
|
||||
}
|
||||
```
|
||||
|
||||
## Notes
|
||||
|
||||
!!! warning "Deprecation"
|
||||
|
||||
This function is deprecated in favor of [`to_string`](to_string.md) and will be removed in a future major version
|
||||
release.
|
||||
|
||||
## Examples
|
||||
|
||||
??? example
|
||||
|
||||
The example shows how JSON Pointers can be implicitly converted to strings.
|
||||
|
||||
```cpp
|
||||
--8<-- "examples/json_pointer__operator_string_t.cpp"
|
||||
```
|
||||
|
||||
Output:
|
||||
|
||||
```json
|
||||
--8<-- "examples/json_pointer__operator_string_t.output"
|
||||
```
|
||||
|
||||
## See also
|
||||
|
||||
- [string_t](../basic_json/string_t.md)- type for strings
|
||||
|
||||
## Version history
|
||||
|
||||
- Since version 2.0.0.
|
||||
- Changed type to `string_t` and deprecated in version 3.11.0.
|
||||
@@ -24,4 +24,4 @@
|
||||
<span class=p>}</span>
|
||||
</code></pre></div> <p>Output:</p> <div class=highlight><pre><span></span><code><span class=err>/</span><span class=kc>f</span><span class=err>oo/</span><span class=mi>0</span>
|
||||
<span class=err>/a~</span><span class=mi>1</span><span class=err>b</span>
|
||||
</code></pre></div> </details> <h2 id=see-also>See also<a class=headerlink href=#see-also title="Permanent link">¶</a></h2> <ul> <li><a href=../../basic_json/string_t/ >string_t</a>- type for strings</li> </ul> <h2 id=version-history>Version history<a class=headerlink href=#version-history title="Permanent link">¶</a></h2> <ul> <li>Since version 2.0.0.</li> <li>Changed type to <code>string_t</code> and deprecated in version 3.11.0.</li> </ul> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="July 4, 2026 09:13:25 UTC">July 4, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path d="M173.9 397.4c0 2-2.3 3.6-5.2 3.6-3.3.3-5.6-1.3-5.6-3.6 0-2 2.3-3.6 5.2-3.6 3-.3 5.6 1.3 5.6 3.6m-31.1-4.5c-.7 2 1.3 4.3 4.3 4.9 2.6 1 5.6 0 6.2-2s-1.3-4.3-4.3-5.2c-2.6-.7-5.5.3-6.2 2.3m44.2-1.7c-2.9.7-4.9 2.6-4.6 4.9.3 2 2.9 3.3 5.9 2.6 2.9-.7 4.9-2.6 4.6-4.6-.3-1.9-3-3.2-5.9-2.9M252.8 8C114.1 8 8 113.3 8 252c0 110.9 69.8 205.8 169.5 239.2 12.8 2.3 17.3-5.6 17.3-12.1 0-6.2-.3-40.4-.3-61.4 0 0-70 15-84.7-29.8 0 0-11.4-29.1-27.8-36.6 0 0-22.9-15.7 1.6-15.4 0 0 24.9 2 38.6 25.8 21.9 38.6 58.6 27.5 72.9 20.9 2.3-16 8.8-27.1 16-33.7-55.9-6.2-112.3-14.3-112.3-110.5 0-27.5 7.6-41.3 23.6-58.9-2.6-6.5-11.1-33.3 2.6-67.9 20.9-6.5 69 27 69 27 20-5.6 41.5-8.5 62.8-8.5s42.8 2.9 62.8 8.5c0 0 48.1-33.6 69-27 13.7 34.7 5.2 61.4 2.6 67.9 16 17.7 25.8 31.5 25.8 58.9 0 96.5-58.9 104.2-114.8 110.5 9.2 7.9 17 22.9 17 46.4 0 33.7-.3 75.4-.3 83.6 0 6.5 4.6 14.4 17.3 12.1C436.2 457.8 504 362.9 504 252 504 113.3 391.5 8 252.8 8M105.2 352.9c-1.3 1-1 3.3.7 5.2 1.6 1.6 3.9 2.3 5.2 1 1.3-1 1-3.3-.7-5.2-1.6-1.6-3.9-2.3-5.2-1m-10.8-8.1c-.7 1.3.3 2.9 2.3 3.9 1.6 1 3.6.7 4.3-.7.7-1.3-.3-2.9-2.3-3.9-2-.6-3.6-.3-4.3.7m32.4 35.6c-1.6 1.3-1 4.3 1.3 6.2 2.3 2.3 5.2 2.6 6.5 1 1.3-1.3.7-4.3-1.3-6.2-2.2-2.3-5.2-2.6-6.5-1m-11.4-14.7c-1.6 1-1.6 3.6 0 5.9s4.3 3.3 5.6 2.3c1.6-1.3 1.6-3.9 0-6.2-1.4-2.3-4-3.3-5.6-2"/></svg> </a> <a href="https://www.linkedin.com/in/nielslohmann/" target="_blank" rel="noopener" title="www.linkedin.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 448 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path d="M416 32H31.9C14.3 32 0 46.5 0 64.3v383.4C0 465.5 14.3 480 31.9 480H416c17.6 0 32-14.5 32-32.3V64.3c0-17.8-14.4-32.3-32-32.3M135.4 416H69V202.2h66.5V416zM102.2 96a38.5 38.5 0 1 1 0 77 38.5 38.5 0 1 1 0-77m282.1 320h-66.4V312c0-24.8-.5-56.7-34.5-56.7-34.6 0-39.9 27-39.9 54.9V416h-66.4V202.2h63.7v29.2h.9c8.9-16.8 30.6-34.5 62.9-34.5 67.2 0 79.7 44.3 79.7 101.9z"/></svg> </a> <a href="https://www.xing.com/profile/Niels_Lohmann" target="_blank" rel="noopener" title="www.xing.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 384 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesoLine truncated
|
||||
</code></pre></div> </details> <h2 id=see-also>See also<a class=headerlink href=#see-also title="Permanent link">¶</a></h2> <ul> <li><a href=../../basic_json/string_t/ >string_t</a>- type for strings</li> </ul> <h2 id=version-history>Version history<a class=headerlink href=#version-history title="Permanent link">¶</a></h2> <ul> <li>Since version 2.0.0.</li> <li>Changed type to <code>string_t</code> and deprecated in version 3.11.0.</li> </ul> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="July 8, 2026 18:18:24 UTC">July 8, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path d="M173.9 397.4c0 2-2.3 3.6-5.2 3.6-3.3.3-5.6-1.3-5.6-3.6 0-2 2.3-3.6 5.2-3.6 3-.3 5.6 1.3 5.6 3.6m-31.1-4.5c-.7 2 1.3 4.3 4.3 4.9 2.6 1 5.6 0 6.2-2s-1.3-4.3-4.3-5.2c-2.6-.7-5.5.3-6.2 2.3m44.2-1.7c-2.9.7-4.9 2.6-4.6 4.9.3 2 2.9 3.3 5.9 2.6 2.9-.7 4.9-2.6 4.6-4.6-.3-1.9-3-3.2-5.9-2.9M252.8 8C114.1 8 8 113.3 8 252c0 110.9 69.8 205.8 169.5 239.2 12.8 2.3 17.3-5.6 17.3-12.1 0-6.2-.3-40.4-.3-61.4 0 0-70 15-84.7-29.8 0 0-11.4-29.1-27.8-36.6 0 0-22.9-15.7 1.6-15.4 0 0 24.9 2 38.6 25.8 21.9 38.6 58.6 27.5 72.9 20.9 2.3-16 8.8-27.1 16-33.7-55.9-6.2-112.3-14.3-112.3-110.5 0-27.5 7.6-41.3 23.6-58.9-2.6-6.5-11.1-33.3 2.6-67.9 20.9-6.5 69 27 69 27 20-5.6 41.5-8.5 62.8-8.5s42.8 2.9 62.8 8.5c0 0 48.1-33.6 69-27 13.7 34.7 5.2 61.4 2.6 67.9 16 17.7 25.8 31.5 25.8 58.9 0 96.5-58.9 104.2-114.8 110.5 9.2 7.9 17 22.9 17 46.4 0 33.7-.3 75.4-.3 83.6 0 6.5 4.6 14.4 17.3 12.1C436.2 457.8 504 362.9 504 252 504 113.3 391.5 8 252.8 8M105.2 352.9c-1.3 1-1 3.3.7 5.2 1.6 1.6 3.9 2.3 5.2 1 1.3-1 1-3.3-.7-5.2-1.6-1.6-3.9-2.3-5.2-1m-10.8-8.1c-.7 1.3.3 2.9 2.3 3.9 1.6 1 3.6.7 4.3-.7.7-1.3-.3-2.9-2.3-3.9-2-.6-3.6-.3-4.3.7m32.4 35.6c-1.6 1.3-1 4.3 1.3 6.2 2.3 2.3 5.2 2.6 6.5 1 1.3-1.3.7-4.3-1.3-6.2-2.2-2.3-5.2-2.6-6.5-1m-11.4-14.7c-1.6 1-1.6 3.6 0 5.9s4.3 3.3 5.6 2.3c1.6-1.3 1.6-3.9 0-6.2-1.4-2.3-4-3.3-5.6-2"/></svg> </a> <a href="https://www.linkedin.com/in/nielslohmann/" target="_blank" rel="noopener" title="www.linkedin.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 448 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path d="M416 32H31.9C14.3 32 0 46.5 0 64.3v383.4C0 465.5 14.3 480 31.9 480H416c17.6 0 32-14.5 32-32.3V64.3c0-17.8-14.4-32.3-32-32.3M135.4 416H69V202.2h66.5V416zM102.2 96a38.5 38.5 0 1 1 0 77 38.5 38.5 0 1 1 0-77m282.1 320h-66.4V312c0-24.8-.5-56.7-34.5-56.7-34.6 0-39.9 27-39.9 54.9V416h-66.4V202.2h63.7v29.2h.9c8.9-16.8 30.6-34.5 62.9-34.5 67.2 0 79.7 44.3 79.7 101.9z"/></svg> </a> <a href="https://www.xing.com/profile/Niels_Lohmann" target="_blank" rel="noopener" title="www.xing.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 384 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesoLine truncated
|
||||
@@ -0,0 +1,70 @@
|
||||
# nlohmann::json_pointer::operator string_t
|
||||
|
||||
```
|
||||
operator string_t() const
|
||||
```
|
||||
|
||||
Return a string representation of the JSON pointer.
|
||||
|
||||
## Return value
|
||||
|
||||
A string representation of the JSON pointer
|
||||
|
||||
## Possible implementation
|
||||
|
||||
```
|
||||
operator string_t() const
|
||||
{
|
||||
return to_string();
|
||||
}
|
||||
```
|
||||
|
||||
## Notes
|
||||
|
||||
Deprecation
|
||||
|
||||
This function is deprecated in favor of [`to_string`](https://json.nlohmann.me/api/json_pointer/to_string/index.md) and will be removed in a future major version release.
|
||||
|
||||
## Examples
|
||||
|
||||
Example
|
||||
|
||||
The example shows how JSON Pointers can be implicitly converted to strings.
|
||||
|
||||
```
|
||||
#include <iostream>
|
||||
#include <nlohmann/json.hpp>
|
||||
|
||||
using json = nlohmann::json;
|
||||
|
||||
int main()
|
||||
{
|
||||
// different JSON Pointers
|
||||
json::json_pointer ptr1("/foo/0");
|
||||
json::json_pointer ptr2("/a~1b");
|
||||
|
||||
// implicit conversion to string
|
||||
std::string s;
|
||||
s += ptr1;
|
||||
s += "\n";
|
||||
s += ptr2;
|
||||
|
||||
std::cout << s << std::endl;
|
||||
}
|
||||
```
|
||||
|
||||
Output:
|
||||
|
||||
```
|
||||
/foo/0
|
||||
/a~1b
|
||||
```
|
||||
|
||||
## See also
|
||||
|
||||
- [string_t](https://json.nlohmann.me/api/basic_json/string_t/index.md)- type for strings
|
||||
|
||||
## Version history
|
||||
|
||||
- Since version 2.0.0.
|
||||
- Changed type to `string_t` and deprecated in version 3.11.0.
|
||||
@@ -0,0 +1,44 @@
|
||||
# <small>nlohmann::json_pointer::</small>parent_pointer
|
||||
|
||||
```cpp
|
||||
json_pointer parent_pointer() const;
|
||||
```
|
||||
|
||||
Returns the parent of this JSON pointer.
|
||||
|
||||
## Return value
|
||||
|
||||
Parent of this JSON pointer; in case this JSON pointer is the root, the root itself is returned.
|
||||
|
||||
## Exception safety
|
||||
|
||||
No-throw guarantee: this function never throws exceptions.
|
||||
|
||||
## Complexity
|
||||
|
||||
Linear in the length of the JSON pointer.
|
||||
|
||||
## Examples
|
||||
|
||||
??? example
|
||||
|
||||
The example shows the result of `parent_pointer` for different JSON Pointers.
|
||||
|
||||
```cpp
|
||||
--8<-- "examples/json_pointer__parent_pointer.cpp"
|
||||
```
|
||||
|
||||
Output:
|
||||
|
||||
```json
|
||||
--8<-- "examples/json_pointer__parent_pointer.output"
|
||||
```
|
||||
|
||||
## See also
|
||||
|
||||
- [pop_back](pop_back.md) remove the last reference token
|
||||
- [back](back.md) return the last reference token
|
||||
|
||||
## Version history
|
||||
|
||||
Added in version 3.6.0.
|
||||
@@ -20,4 +20,4 @@
|
||||
</code></pre></div> <p>Output:</p> <div class=highlight><pre><span></span><code><span class=err>pare</span><span class=kc>nt</span><span class=w> </span><span class=err>o</span><span class=kc>f</span><span class=w> </span><span class=s2>""</span><span class=w> </span><span class=err>is</span><span class=w> </span><span class=s2>""</span>
|
||||
<span class=err>pare</span><span class=kc>nt</span><span class=w> </span><span class=err>o</span><span class=kc>f</span><span class=w> </span><span class=s2>"/foo"</span><span class=w> </span><span class=err>is</span><span class=w> </span><span class=s2>""</span>
|
||||
<span class=err>pare</span><span class=kc>nt</span><span class=w> </span><span class=err>o</span><span class=kc>f</span><span class=w> </span><span class=s2>"/foo/0"</span><span class=w> </span><span class=err>is</span><span class=w> </span><span class=s2>"/foo"</span>
|
||||
</code></pre></div> </details> <h2 id=see-also>See also<a class=headerlink href=#see-also title="Permanent link">¶</a></h2> <ul> <li><a href=../pop_back/ >pop_back</a> remove the last reference token</li> <li><a href=../back/ >back</a> return the last reference token</li> </ul> <h2 id=version-history>Version history<a class=headerlink href=#version-history title="Permanent link">¶</a></h2> <p>Added in version 3.6.0.</p> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="July 4, 2026 09:13:25 UTC">July 4, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path d="M173.9 397.4c0 2-2.3 3.6-5.2 3.6-3.3.3-5.6-1.3-5.6-3.6 0-2 2.3-3.6 5.2-3.6 3-.3 5.6 1.3 5.6 3.6m-31.1-4.5c-.7 2 1.3 4.3 4.3 4.9 2.6 1 5.6 0 6.2-2s-1.3-4.3-4.3-5.2c-2.6-.7-5.5.3-6.2 2.3m44.2-1.7c-2.9.7-4.9 2.6-4.6 4.9.3 2 2.9 3.3 5.9 2.6 2.9-.7 4.9-2.6 4.6-4.6-.3-1.9-3-3.2-5.9-2.9M252.8 8C114.1 8 8 113.3 8 252c0 110.9 69.8 205.8 169.5 239.2 12.8 2.3 17.3-5.6 17.3-12.1 0-6.2-.3-40.4-.3-61.4 0 0-70 15-84.7-29.8 0 0-11.4-29.1-27.8-36.6 0 0-22.9-15.7 1.6-15.4 0 0 24.9 2 38.6 25.8 21.9 38.6 58.6 27.5 72.9 20.9 2.3-16 8.8-27.1 16-33.7-55.9-6.2-112.3-14.3-112.3-110.5 0-27.5 7.6-41.3 23.6-58.9-2.6-6.5-11.1-33.3 2.6-67.9 20.9-6.5 69 27 69 27 20-5.6 41.5-8.5 62.8-8.5s42.8 2.9 62.8 8.5c0 0 48.1-33.6 69-27 13.7 34.7 5.2 61.4 2.6 67.9 16 17.7 25.8 31.5 25.8 58.9 0 96.5-58.9 104.2-114.8 110.5 9.2 7.9 17 22.9 17 46.4 0 33.7-.3 75.4-.3 83.6 0 6.5 4.6 14.4 17.3 12.1C436.2 457.8 504 362.9 504 252 504 113.3 391.5 8 252.8 8M105.2 352.9c-1.3 1-1 3.3.7 5.2 1.6 1.6 3.9 2.3 5.2 1 1.3-1 1-3.3-.7-5.2-1.6-1.6-3.9-2.3-5.2-1m-10.8-8.1c-.7 1.3.3 2.9 2.3 3.9 1.6 1 3.6.7 4.3-.7.7-1.3-.3-2.9-2.3-3.9-2-.6-3.6-.3-4.3.7m32.4 35.6c-1.6 1.3-1 4.3 1.3 6.2 2.3 2.3 5.2 2.6 6.5 1 1.3-1.3.7-4.3-1.3-6.2-2.2-2.3-5.2-2.6-6.5-1m-11.4-14.7c-1.6 1-1.6 3.6 0 5.9s4.3 3.3 5.6 2.3c1.6-1.3 1.6-3.9 0-6.2-1.4-2.3-4-3.3-5.6-2"/></svg> </a> <a href="https://www.linkedin.com/in/nielslohmann/" target="_blank" rel="noopener" title="www.linkedin.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 448 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path d="M416 32H31.9C14.3 32 0 46.5 0 64.3v383.4C0 465.5 14.3 480 31.9 480H416c17.6 0 32-14.5 32-32.3V64.3c0-17.8-14.4-32.3-32-32.3M135.4 416H69V202.2h66.5V416zM102.2 96a38.5 38.5 0 1 1 0 77 38.5 38.5 0 1 1 0-77m282.1 320h-66.4V312c0-24.8-.5-56.7-34.5-56.7-34.6 0-39.9 27-39.9 54.9V416h-66.4V202.2h63.7v29.2h.9c8.9-16.8 30.6-34.5 62.9-34.5 67.2 0 79.7 44.3 79.7 101.9z"/></svg> </a> <a href="https://www.xing.com/profile/Niels_Lohmann" target="_blank" rel="noopener" title="www.xing.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 384 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (IcLine truncated
|
||||
</code></pre></div> </details> <h2 id=see-also>See also<a class=headerlink href=#see-also title="Permanent link">¶</a></h2> <ul> <li><a href=../pop_back/ >pop_back</a> remove the last reference token</li> <li><a href=../back/ >back</a> return the last reference token</li> </ul> <h2 id=version-history>Version history<a class=headerlink href=#version-history title="Permanent link">¶</a></h2> <p>Added in version 3.6.0.</p> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="July 8, 2026 18:18:24 UTC">July 8, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path d="M173.9 397.4c0 2-2.3 3.6-5.2 3.6-3.3.3-5.6-1.3-5.6-3.6 0-2 2.3-3.6 5.2-3.6 3-.3 5.6 1.3 5.6 3.6m-31.1-4.5c-.7 2 1.3 4.3 4.3 4.9 2.6 1 5.6 0 6.2-2s-1.3-4.3-4.3-5.2c-2.6-.7-5.5.3-6.2 2.3m44.2-1.7c-2.9.7-4.9 2.6-4.6 4.9.3 2 2.9 3.3 5.9 2.6 2.9-.7 4.9-2.6 4.6-4.6-.3-1.9-3-3.2-5.9-2.9M252.8 8C114.1 8 8 113.3 8 252c0 110.9 69.8 205.8 169.5 239.2 12.8 2.3 17.3-5.6 17.3-12.1 0-6.2-.3-40.4-.3-61.4 0 0-70 15-84.7-29.8 0 0-11.4-29.1-27.8-36.6 0 0-22.9-15.7 1.6-15.4 0 0 24.9 2 38.6 25.8 21.9 38.6 58.6 27.5 72.9 20.9 2.3-16 8.8-27.1 16-33.7-55.9-6.2-112.3-14.3-112.3-110.5 0-27.5 7.6-41.3 23.6-58.9-2.6-6.5-11.1-33.3 2.6-67.9 20.9-6.5 69 27 69 27 20-5.6 41.5-8.5 62.8-8.5s42.8 2.9 62.8 8.5c0 0 48.1-33.6 69-27 13.7 34.7 5.2 61.4 2.6 67.9 16 17.7 25.8 31.5 25.8 58.9 0 96.5-58.9 104.2-114.8 110.5 9.2 7.9 17 22.9 17 46.4 0 33.7-.3 75.4-.3 83.6 0 6.5 4.6 14.4 17.3 12.1C436.2 457.8 504 362.9 504 252 504 113.3 391.5 8 252.8 8M105.2 352.9c-1.3 1-1 3.3.7 5.2 1.6 1.6 3.9 2.3 5.2 1 1.3-1 1-3.3-.7-5.2-1.6-1.6-3.9-2.3-5.2-1m-10.8-8.1c-.7 1.3.3 2.9 2.3 3.9 1.6 1 3.6.7 4.3-.7.7-1.3-.3-2.9-2.3-3.9-2-.6-3.6-.3-4.3.7m32.4 35.6c-1.6 1.3-1 4.3 1.3 6.2 2.3 2.3 5.2 2.6 6.5 1 1.3-1.3.7-4.3-1.3-6.2-2.2-2.3-5.2-2.6-6.5-1m-11.4-14.7c-1.6 1-1.6 3.6 0 5.9s4.3 3.3 5.6 2.3c1.6-1.3 1.6-3.9 0-6.2-1.4-2.3-4-3.3-5.6-2"/></svg> </a> <a href="https://www.linkedin.com/in/nielslohmann/" target="_blank" rel="noopener" title="www.linkedin.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 448 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path d="M416 32H31.9C14.3 32 0 46.5 0 64.3v383.4C0 465.5 14.3 480 31.9 480H416c17.6 0 32-14.5 32-32.3V64.3c0-17.8-14.4-32.3-32-32.3M135.4 416H69V202.2h66.5V416zM102.2 96a38.5 38.5 0 1 1 0 77 38.5 38.5 0 1 1 0-77m282.1 320h-66.4V312c0-24.8-.5-56.7-34.5-56.7-34.6 0-39.9 27-39.9 54.9V416h-66.4V202.2h63.7v29.2h.9c8.9-16.8 30.6-34.5 62.9-34.5 67.2 0 79.7 44.3 79.7 101.9z"/></svg> </a> <a href="https://www.xing.com/profile/Niels_Lohmann" target="_blank" rel="noopener" title="www.xing.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 384 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (IcLine truncated
|
||||
@@ -0,0 +1,63 @@
|
||||
# nlohmann::json_pointer::parent_pointer
|
||||
|
||||
```
|
||||
json_pointer parent_pointer() const;
|
||||
```
|
||||
|
||||
Returns the parent of this JSON pointer.
|
||||
|
||||
## Return value
|
||||
|
||||
Parent of this JSON pointer; in case this JSON pointer is the root, the root itself is returned.
|
||||
|
||||
## Exception safety
|
||||
|
||||
No-throw guarantee: this function never throws exceptions.
|
||||
|
||||
## Complexity
|
||||
|
||||
Linear in the length of the JSON pointer.
|
||||
|
||||
## Examples
|
||||
|
||||
Example
|
||||
|
||||
The example shows the result of `parent_pointer` for different JSON Pointers.
|
||||
|
||||
```
|
||||
#include <iostream>
|
||||
#include <nlohmann/json.hpp>
|
||||
|
||||
using json = nlohmann::json;
|
||||
|
||||
int main()
|
||||
{
|
||||
// different JSON Pointers
|
||||
json::json_pointer ptr1("");
|
||||
json::json_pointer ptr2("/foo");
|
||||
json::json_pointer ptr3("/foo/0");
|
||||
|
||||
// call parent_pointer()
|
||||
std::cout << std::boolalpha
|
||||
<< "parent of \"" << ptr1 << "\" is \"" << ptr1.parent_pointer() << "\"\n"
|
||||
<< "parent of \"" << ptr2 << "\" is \"" << ptr2.parent_pointer() << "\"\n"
|
||||
<< "parent of \"" << ptr3 << "\" is \"" << ptr3.parent_pointer() << "\"" << std::endl;
|
||||
}
|
||||
```
|
||||
|
||||
Output:
|
||||
|
||||
```
|
||||
parent of "" is ""
|
||||
parent of "/foo" is ""
|
||||
parent of "/foo/0" is "/foo"
|
||||
```
|
||||
|
||||
## See also
|
||||
|
||||
- [pop_back](https://json.nlohmann.me/api/json_pointer/pop_back/index.md) remove the last reference token
|
||||
- [back](https://json.nlohmann.me/api/json_pointer/back/index.md) return the last reference token
|
||||
|
||||
## Version history
|
||||
|
||||
Added in version 3.6.0.
|
||||
@@ -0,0 +1,35 @@
|
||||
# <small>nlohmann::json_pointer::</small>pop_back
|
||||
|
||||
```cpp
|
||||
void pop_back();
|
||||
```
|
||||
|
||||
Remove the last reference token.
|
||||
|
||||
## Exceptions
|
||||
|
||||
Throws [out_of_range.405](../../home/exceptions.md#jsonexceptionout_of_range405) if the JSON pointer has no parent.
|
||||
|
||||
## Complexity
|
||||
|
||||
Constant.
|
||||
|
||||
## Examples
|
||||
|
||||
??? example
|
||||
|
||||
The example shows the usage of `pop_back`.
|
||||
|
||||
```cpp
|
||||
--8<-- "examples/json_pointer__pop_back.cpp"
|
||||
```
|
||||
|
||||
Output:
|
||||
|
||||
```json
|
||||
--8<-- "examples/json_pointer__pop_back.output"
|
||||
```
|
||||
|
||||
## Version history
|
||||
|
||||
Added in version 3.6.0.
|
||||
@@ -24,4 +24,4 @@
|
||||
<span class=s2>"/foo/bar"</span>
|
||||
<span class=s2>"/foo"</span>
|
||||
<span class=s2>""</span>
|
||||
</code></pre></div> </details> <h2 id=version-history>Version history<a class=headerlink href=#version-history title="Permanent link">¶</a></h2> <p>Added in version 3.6.0.</p> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="July 4, 2026 09:13:25 UTC">July 4, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - 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|
||||
</code></pre></div> </details> <h2 id=version-history>Version history<a class=headerlink href=#version-history title="Permanent link">¶</a></h2> <p>Added in version 3.6.0.</p> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="July 8, 2026 18:18:24 UTC">July 8, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - 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|
||||
@@ -0,0 +1,58 @@
|
||||
# nlohmann::json_pointer::pop_back
|
||||
|
||||
```
|
||||
void pop_back();
|
||||
```
|
||||
|
||||
Remove the last reference token.
|
||||
|
||||
## Exceptions
|
||||
|
||||
Throws [out_of_range.405](https://json.nlohmann.me/home/exceptions/#jsonexceptionout_of_range405) if the JSON pointer has no parent.
|
||||
|
||||
## Complexity
|
||||
|
||||
Constant.
|
||||
|
||||
## Examples
|
||||
|
||||
Example
|
||||
|
||||
The example shows the usage of `pop_back`.
|
||||
|
||||
```
|
||||
#include <iostream>
|
||||
#include <nlohmann/json.hpp>
|
||||
|
||||
using json = nlohmann::json;
|
||||
|
||||
int main()
|
||||
{
|
||||
// create empty JSON Pointer
|
||||
json::json_pointer ptr("/foo/bar/baz");
|
||||
std::cout << "\"" << ptr << "\"\n";
|
||||
|
||||
// call pop_back()
|
||||
ptr.pop_back();
|
||||
std::cout << "\"" << ptr << "\"\n";
|
||||
|
||||
ptr.pop_back();
|
||||
std::cout << "\"" << ptr << "\"\n";
|
||||
|
||||
ptr.pop_back();
|
||||
std::cout << "\"" << ptr << "\"\n";
|
||||
}
|
||||
```
|
||||
|
||||
Output:
|
||||
|
||||
```
|
||||
"/foo/bar/baz"
|
||||
"/foo/bar"
|
||||
"/foo"
|
||||
""
|
||||
```
|
||||
|
||||
## Version history
|
||||
|
||||
Added in version 3.6.0.
|
||||
@@ -0,0 +1,35 @@
|
||||
# <small>nlohmann::json_pointer::</small>pop_front
|
||||
|
||||
```cpp
|
||||
void pop_front();
|
||||
```
|
||||
|
||||
Remove the first reference token.
|
||||
|
||||
## Exceptions
|
||||
|
||||
Throws [out_of_range.405](../../home/exceptions.md#jsonexceptionout_of_range405) if the JSON pointer has no parent.
|
||||
|
||||
## Complexity
|
||||
|
||||
Linear in the number of reference tokens in the `json_pointer`.
|
||||
|
||||
## Examples
|
||||
|
||||
??? example
|
||||
|
||||
The example shows the usage of `pop_front`.
|
||||
|
||||
```cpp
|
||||
--8<-- "examples/json_pointer__pop_front.cpp"
|
||||
```
|
||||
|
||||
Output:
|
||||
|
||||
```json
|
||||
--8<-- "examples/json_pointer__pop_front.output"
|
||||
```
|
||||
|
||||
## Version history
|
||||
|
||||
- Added in version 3.12.x.
|
||||
@@ -24,4 +24,4 @@
|
||||
<span class=s2>"/bar/baz"</span>
|
||||
<span class=s2>"/baz"</span>
|
||||
<span class=s2>""</span>
|
||||
</code></pre></div> </details> <h2 id=version-history>Version history<a class=headerlink href=#version-history title="Permanent link">¶</a></h2> <ul> <li>Added in version 3.12.x.</li> </ul> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="July 4, 2026 09:13:25 UTC">July 4, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - 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|
||||
</code></pre></div> </details> <h2 id=version-history>Version history<a class=headerlink href=#version-history title="Permanent link">¶</a></h2> <ul> <li>Added in version 3.12.x.</li> </ul> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="July 8, 2026 18:18:24 UTC">July 8, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - 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|
||||
@@ -0,0 +1,58 @@
|
||||
# nlohmann::json_pointer::pop_front
|
||||
|
||||
```
|
||||
void pop_front();
|
||||
```
|
||||
|
||||
Remove the first reference token.
|
||||
|
||||
## Exceptions
|
||||
|
||||
Throws [out_of_range.405](https://json.nlohmann.me/home/exceptions/#jsonexceptionout_of_range405) if the JSON pointer has no parent.
|
||||
|
||||
## Complexity
|
||||
|
||||
Linear in the number of reference tokens in the `json_pointer`.
|
||||
|
||||
## Examples
|
||||
|
||||
Example
|
||||
|
||||
The example shows the usage of `pop_front`.
|
||||
|
||||
```
|
||||
#include <iostream>
|
||||
#include <nlohmann/json.hpp>
|
||||
|
||||
using json = nlohmann::json;
|
||||
|
||||
int main()
|
||||
{
|
||||
// create empty JSON Pointer
|
||||
json::json_pointer ptr("/foo/bar/baz");
|
||||
std::cout << "\"" << ptr << "\"\n";
|
||||
|
||||
// call pop_front()
|
||||
ptr.pop_front();
|
||||
std::cout << "\"" << ptr << "\"\n";
|
||||
|
||||
ptr.pop_front();
|
||||
std::cout << "\"" << ptr << "\"\n";
|
||||
|
||||
ptr.pop_front();
|
||||
std::cout << "\"" << ptr << "\"\n";
|
||||
}
|
||||
```
|
||||
|
||||
Output:
|
||||
|
||||
```
|
||||
"/foo/bar/baz"
|
||||
"/bar/baz"
|
||||
"/baz"
|
||||
""
|
||||
```
|
||||
|
||||
## Version history
|
||||
|
||||
- Added in version 3.12.x.
|
||||
@@ -0,0 +1,39 @@
|
||||
# <small>nlohmann::json_pointer::</small>push_back
|
||||
|
||||
```cpp
|
||||
void push_back(const string_t& token);
|
||||
|
||||
void push_back(string_t&& token);
|
||||
```
|
||||
|
||||
Append an unescaped token at the end of the reference pointer.
|
||||
|
||||
## Parameters
|
||||
|
||||
`token` (in)
|
||||
: token to add
|
||||
|
||||
## Complexity
|
||||
|
||||
Amortized constant.
|
||||
|
||||
## Examples
|
||||
|
||||
??? example
|
||||
|
||||
The example shows the result of `push_back` for different JSON Pointers.
|
||||
|
||||
```cpp
|
||||
--8<-- "examples/json_pointer__push_back.cpp"
|
||||
```
|
||||
|
||||
Output:
|
||||
|
||||
```json
|
||||
--8<-- "examples/json_pointer__push_back.output"
|
||||
```
|
||||
|
||||
## Version history
|
||||
|
||||
- Added in version 3.6.0.
|
||||
- Changed type of `token` to `string_t` in version 3.11.0.
|
||||
@@ -26,4 +26,4 @@
|
||||
<span class=s2>"/foo"</span>
|
||||
<span class=s2>"/foo/0"</span>
|
||||
<span class=s2>"/foo/0/bar"</span>
|
||||
</code></pre></div> </details> <h2 id=version-history>Version history<a class=headerlink href=#version-history title="Permanent link">¶</a></h2> <ul> <li>Added in version 3.6.0.</li> <li>Changed type of <code>token</code> to <code>string_t</code> in version 3.11.0.</li> </ul> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="July 4, 2026 09:13:25 UTC">July 4, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - 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|
||||
</code></pre></div> </details> <h2 id=version-history>Version history<a class=headerlink href=#version-history title="Permanent link">¶</a></h2> <ul> <li>Added in version 3.6.0.</li> <li>Changed type of <code>token</code> to <code>string_t</code> in version 3.11.0.</li> </ul> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="July 8, 2026 18:18:24 UTC">July 8, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - 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|
||||
@@ -0,0 +1,61 @@
|
||||
# nlohmann::json_pointer::push_back
|
||||
|
||||
```
|
||||
void push_back(const string_t& token);
|
||||
|
||||
void push_back(string_t&& token);
|
||||
```
|
||||
|
||||
Append an unescaped token at the end of the reference pointer.
|
||||
|
||||
## Parameters
|
||||
|
||||
`token` (in) : token to add
|
||||
|
||||
## Complexity
|
||||
|
||||
Amortized constant.
|
||||
|
||||
## Examples
|
||||
|
||||
Example
|
||||
|
||||
The example shows the result of `push_back` for different JSON Pointers.
|
||||
|
||||
```
|
||||
#include <iostream>
|
||||
#include <nlohmann/json.hpp>
|
||||
|
||||
using json = nlohmann::json;
|
||||
|
||||
int main()
|
||||
{
|
||||
// create empty JSON Pointer
|
||||
json::json_pointer ptr;
|
||||
std::cout << "\"" << ptr << "\"\n";
|
||||
|
||||
// call push_back()
|
||||
ptr.push_back("foo");
|
||||
std::cout << "\"" << ptr << "\"\n";
|
||||
|
||||
ptr.push_back("0");
|
||||
std::cout << "\"" << ptr << "\"\n";
|
||||
|
||||
ptr.push_back("bar");
|
||||
std::cout << "\"" << ptr << "\"\n";
|
||||
}
|
||||
```
|
||||
|
||||
Output:
|
||||
|
||||
```
|
||||
""
|
||||
"/foo"
|
||||
"/foo/0"
|
||||
"/foo/0/bar"
|
||||
```
|
||||
|
||||
## Version history
|
||||
|
||||
- Added in version 3.6.0.
|
||||
- Changed type of `token` to `string_t` in version 3.11.0.
|
||||
@@ -0,0 +1,38 @@
|
||||
# <small>nlohmann::json_pointer::</small>push_front
|
||||
|
||||
```cpp
|
||||
void push_front(const string_t& token);
|
||||
|
||||
void push_front(string_t&& token);
|
||||
```
|
||||
|
||||
Append an unescaped token at the start of the reference pointer.
|
||||
|
||||
## Parameters
|
||||
|
||||
`token` (in)
|
||||
: token to add
|
||||
|
||||
## Complexity
|
||||
|
||||
Linear in the number of reference tokens in the `json_pointer`.
|
||||
|
||||
## Examples
|
||||
|
||||
??? example
|
||||
|
||||
The example shows the result of `push_front` for different JSON Pointers.
|
||||
|
||||
```cpp
|
||||
--8<-- "examples/json_pointer__push_front.cpp"
|
||||
```
|
||||
|
||||
Output:
|
||||
|
||||
```json
|
||||
--8<-- "examples/json_pointer__push_front.output"
|
||||
```
|
||||
|
||||
## Version history
|
||||
|
||||
- Added in version 3.12.x.
|
||||
@@ -26,4 +26,4 @@
|
||||
<span class=s2>"/foo"</span>
|
||||
<span class=s2>"/0/foo"</span>
|
||||
<span class=s2>"/bar/0/foo"</span>
|
||||
</code></pre></div> </details> <h2 id=version-history>Version history<a class=headerlink href=#version-history title="Permanent link">¶</a></h2> <ul> <li>Added in version 3.12.x.</li> </ul> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="July 4, 2026 09:13:25 UTC">July 4, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - 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|
||||
</code></pre></div> </details> <h2 id=version-history>Version history<a class=headerlink href=#version-history title="Permanent link">¶</a></h2> <ul> <li>Added in version 3.12.x.</li> </ul> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="July 8, 2026 18:18:24 UTC">July 8, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - 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|
||||
@@ -0,0 +1,60 @@
|
||||
# nlohmann::json_pointer::push_front
|
||||
|
||||
```
|
||||
void push_front(const string_t& token);
|
||||
|
||||
void push_front(string_t&& token);
|
||||
```
|
||||
|
||||
Append an unescaped token at the start of the reference pointer.
|
||||
|
||||
## Parameters
|
||||
|
||||
`token` (in) : token to add
|
||||
|
||||
## Complexity
|
||||
|
||||
Linear in the number of reference tokens in the `json_pointer`.
|
||||
|
||||
## Examples
|
||||
|
||||
Example
|
||||
|
||||
The example shows the result of `push_front` for different JSON Pointers.
|
||||
|
||||
```
|
||||
#include <iostream>
|
||||
#include <nlohmann/json.hpp>
|
||||
|
||||
using json = nlohmann::json;
|
||||
|
||||
int main()
|
||||
{
|
||||
// create empty JSON Pointer
|
||||
json::json_pointer ptr;
|
||||
std::cout << "\"" << ptr << "\"\n";
|
||||
|
||||
// call push_front()
|
||||
ptr.push_front("foo");
|
||||
std::cout << "\"" << ptr << "\"\n";
|
||||
|
||||
ptr.push_front("0");
|
||||
std::cout << "\"" << ptr << "\"\n";
|
||||
|
||||
ptr.push_front("bar");
|
||||
std::cout << "\"" << ptr << "\"\n";
|
||||
}
|
||||
```
|
||||
|
||||
Output:
|
||||
|
||||
```
|
||||
""
|
||||
"/foo"
|
||||
"/0/foo"
|
||||
"/bar/0/foo"
|
||||
```
|
||||
|
||||
## Version history
|
||||
|
||||
- Added in version 3.12.x.
|
||||
@@ -0,0 +1,28 @@
|
||||
# <small>nlohmann::json_pointer::</small>string_t
|
||||
```cpp
|
||||
using string_t = RefStringType;
|
||||
```
|
||||
|
||||
The string type used for the reference tokens making up the JSON pointer.
|
||||
|
||||
See [`basic_json::string_t`](../basic_json/string_t.md) for more information.
|
||||
|
||||
## Examples
|
||||
|
||||
??? example
|
||||
|
||||
The example shows the type `string_t` and its relation to `basic_json::string_t`.
|
||||
|
||||
```cpp
|
||||
--8<-- "examples/json_pointer__string_t.cpp"
|
||||
```
|
||||
|
||||
Output:
|
||||
|
||||
```json
|
||||
--8<-- "examples/json_pointer__string_t.output"
|
||||
```
|
||||
|
||||
## Version history
|
||||
|
||||
- Added in version 3.11.0.
|
||||
@@ -14,4 +14,4 @@
|
||||
<span class=p>}</span>
|
||||
</code></pre></div> <p>Output:</p> <div class=highlight><pre><span></span><code><span class=err>This</span><span class=w> </span><span class=err>is</span><span class=w> </span><span class=err>a</span><span class=w> </span><span class=err>s</span><span class=kc>tr</span><span class=err>i</span><span class=kc>n</span><span class=err>g.</span>
|
||||
<span class=kc>true</span>
|
||||
</code></pre></div> </details> <h2 id=version-history>Version history<a class=headerlink href=#version-history title="Permanent link">¶</a></h2> <ul> <li>Added in version 3.11.0.</li> </ul> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="July 4, 2026 09:13:25 UTC">July 4, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - 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|
||||
</code></pre></div> </details> <h2 id=version-history>Version history<a class=headerlink href=#version-history title="Permanent link">¶</a></h2> <ul> <li>Added in version 3.11.0.</li> </ul> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="July 8, 2026 18:18:24 UTC">July 8, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - 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|
||||
@@ -0,0 +1,42 @@
|
||||
# nlohmann::json_pointer::string_t
|
||||
|
||||
```
|
||||
using string_t = RefStringType;
|
||||
```
|
||||
|
||||
The string type used for the reference tokens making up the JSON pointer.
|
||||
|
||||
See [`basic_json::string_t`](https://json.nlohmann.me/api/basic_json/string_t/index.md) for more information.
|
||||
|
||||
## Examples
|
||||
|
||||
Example
|
||||
|
||||
The example shows the type `string_t` and its relation to `basic_json::string_t`.
|
||||
|
||||
```
|
||||
#include <iostream>
|
||||
#include <nlohmann/json.hpp>
|
||||
|
||||
using json = nlohmann::json;
|
||||
|
||||
int main()
|
||||
{
|
||||
json::json_pointer::string_t s = "This is a string.";
|
||||
|
||||
std::cout << s << std::endl;
|
||||
|
||||
std::cout << std::boolalpha << std::is_same<json::json_pointer::string_t, json::string_t>::value << std::endl;
|
||||
}
|
||||
```
|
||||
|
||||
Output:
|
||||
|
||||
```
|
||||
This is a string.
|
||||
true
|
||||
```
|
||||
|
||||
## Version history
|
||||
|
||||
- Added in version 3.11.0.
|
||||
@@ -0,0 +1,40 @@
|
||||
# <small>nlohmann::json_pointer::</small>to_string
|
||||
|
||||
```cpp
|
||||
string_t to_string() const;
|
||||
```
|
||||
|
||||
Return a string representation of the JSON pointer.
|
||||
|
||||
## Return value
|
||||
|
||||
A string representation of the JSON pointer
|
||||
|
||||
## Notes
|
||||
|
||||
For each JSON pointer `ptr`, it holds:
|
||||
|
||||
```cpp
|
||||
ptr == json_pointer(ptr.to_string());
|
||||
```
|
||||
|
||||
## Examples
|
||||
|
||||
??? example
|
||||
|
||||
The example shows the result of `to_string`.
|
||||
|
||||
```cpp
|
||||
--8<-- "examples/json_pointer__to_string.cpp"
|
||||
```
|
||||
|
||||
Output:
|
||||
|
||||
```json
|
||||
--8<-- "examples/json_pointer__to_string.output"
|
||||
```
|
||||
|
||||
## Version history
|
||||
|
||||
- Since version 2.0.0.
|
||||
- Changed return type to `string_t` in version 3.11.0.
|
||||
@@ -46,4 +46,4 @@
|
||||
<span class=s2>"/k"</span><span class=err>l</span><span class=s2>"</span>
|
||||
<span class=s2>"</span><span class=err>/</span><span class=w> </span><span class=s2>"</span>
|
||||
<span class=s2>"</span><span class=err>/m~</span><span class=mi>0</span><span class=kc>n</span><span class=err>"</span>
|
||||
</code></pre></div> </details> <h2 id=version-history>Version history<a class=headerlink href=#version-history title="Permanent link">¶</a></h2> <ul> <li>Since version 2.0.0.</li> <li>Changed return type to <code>string_t</code> in version 3.11.0.</li> </ul> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="July 4, 2026 09:13:25 UTC">July 4, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - 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|
||||
</code></pre></div> </details> <h2 id=version-history>Version history<a class=headerlink href=#version-history title="Permanent link">¶</a></h2> <ul> <li>Since version 2.0.0.</li> <li>Changed return type to <code>string_t</code> in version 3.11.0.</li> </ul> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="July 8, 2026 18:18:24 UTC">July 8, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - 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|
||||
@@ -0,0 +1,84 @@
|
||||
# nlohmann::json_pointer::to_string
|
||||
|
||||
```
|
||||
string_t to_string() const;
|
||||
```
|
||||
|
||||
Return a string representation of the JSON pointer.
|
||||
|
||||
## Return value
|
||||
|
||||
A string representation of the JSON pointer
|
||||
|
||||
## Notes
|
||||
|
||||
For each JSON pointer `ptr`, it holds:
|
||||
|
||||
```
|
||||
ptr == json_pointer(ptr.to_string());
|
||||
```
|
||||
|
||||
## Examples
|
||||
|
||||
Example
|
||||
|
||||
The example shows the result of `to_string`.
|
||||
|
||||
```
|
||||
#include <iostream>
|
||||
#include <nlohmann/json.hpp>
|
||||
|
||||
using json = nlohmann::json;
|
||||
|
||||
int main()
|
||||
{
|
||||
// different JSON Pointers
|
||||
json::json_pointer ptr1("");
|
||||
json::json_pointer ptr2("/foo");
|
||||
json::json_pointer ptr3("/foo/0");
|
||||
json::json_pointer ptr4("/");
|
||||
json::json_pointer ptr5("/a~1b");
|
||||
json::json_pointer ptr6("/c%d");
|
||||
json::json_pointer ptr7("/e^f");
|
||||
json::json_pointer ptr8("/g|h");
|
||||
json::json_pointer ptr9("/i\\j");
|
||||
json::json_pointer ptr10("/k\"l");
|
||||
json::json_pointer ptr11("/ ");
|
||||
json::json_pointer ptr12("/m~0n");
|
||||
|
||||
std::cout << "\"" << ptr1.to_string() << "\"\n"
|
||||
<< "\"" << ptr2.to_string() << "\"\n"
|
||||
<< "\"" << ptr3.to_string() << "\"\n"
|
||||
<< "\"" << ptr4.to_string() << "\"\n"
|
||||
<< "\"" << ptr5.to_string() << "\"\n"
|
||||
<< "\"" << ptr6.to_string() << "\"\n"
|
||||
<< "\"" << ptr7.to_string() << "\"\n"
|
||||
<< "\"" << ptr8.to_string() << "\"\n"
|
||||
<< "\"" << ptr9.to_string() << "\"\n"
|
||||
<< "\"" << ptr10.to_string() << "\"\n"
|
||||
<< "\"" << ptr11.to_string() << "\"\n"
|
||||
<< "\"" << ptr12.to_string() << "\"" << std::endl;
|
||||
}
|
||||
```
|
||||
|
||||
Output:
|
||||
|
||||
```
|
||||
""
|
||||
"/foo"
|
||||
"/foo/0"
|
||||
"/"
|
||||
"/a~1b"
|
||||
"/c%d"
|
||||
"/e^f"
|
||||
"/g|h"
|
||||
"/i\j"
|
||||
"/k"l"
|
||||
"/ "
|
||||
"/m~0n"
|
||||
```
|
||||
|
||||
## Version history
|
||||
|
||||
- Since version 2.0.0.
|
||||
- Changed return type to `string_t` in version 3.11.0.
|
||||
Reference in new issue
Block a user