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@@ -22,10 +22,24 @@ No guarantees, value may be corrupted by an unsuccessful patch operation.
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- Throws [`parse_error.104`](../../home/exceptions.md#jsonexceptionparse_error104) if the JSON patch does not consist of
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an array of objects.
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- Throws [`parse_error.105`](../../home/exceptions.md#jsonexceptionparse_error105) if the JSON patch is malformed (e.g.,
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mandatory attributes are missing); example: `"operation add must have member path"`.
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mandatory attributes are missing); example: `"operation 'add' must have member 'path'"`.
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- Throws [`out_of_range.401`](../../home/exceptions.md#jsonexceptionout_of_range401) if an array index is out of range.
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- Throws [`parse_error.106`](../../home/exceptions.md#jsonexceptionparse_error106) if an array index in a "path" or
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"from" member begins with '0'; example: `"array index '01' must not begin with '0'"`.
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- Throws [`parse_error.107`](../../home/exceptions.md#jsonexceptionparse_error107) if a "path" or "from" member is not
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empty and does not begin with a slash (`/`); example: `"JSON pointer must be empty or begin with '/' - was: 'a'"`.
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- Throws [`parse_error.108`](../../home/exceptions.md#jsonexceptionparse_error108) if a tilde (`~`) in a "path" or
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"from" member is not followed by `0` or `1`; example: `"escape character '~' must be followed with '0' or '1'"`.
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- Throws [`parse_error.109`](../../home/exceptions.md#jsonexceptionparse_error109) if an array index in a "path" or
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"from" member is not a number; example: `"array index 'foo' is not a number"`.
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- Throws [`out_of_range.402`](../../home/exceptions.md#jsonexceptionout_of_range402) if the array index `-` is used
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where an existing element is required (the "path" of "replace", the "from" of "move" and "copy"); example:
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`"array index '-' (3) is out of range"`.
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- Throws [`out_of_range.403`](../../home/exceptions.md#jsonexceptionout_of_range403) if a JSON pointer inside the patch
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could not be resolved successfully in the current JSON value; example: `"key baz not found"`.
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- Throws [`out_of_range.404`](../../home/exceptions.md#jsonexceptionout_of_range404) if a reference token of a JSON
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pointer inside the patch cannot be resolved, e.g., `-` in a "remove" operation or `1a` for an array; example:
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`"unresolved reference token '-'"`.
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- Throws [`out_of_range.405`](../../home/exceptions.md#jsonexceptionout_of_range405) if JSON pointer has no parent
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("add", "remove", "move")
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- Throws [`out_of_range.411`](../../home/exceptions.md#jsonexceptionout_of_range411) if an "add" operation's target
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@@ -50,7 +64,7 @@ function throws an exception.
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## Examples
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??? example
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??? example "Example: apply a JSON patch in place"
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The following code shows how a JSON patch is applied to a value.
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@@ -64,6 +78,22 @@ function throws an exception.
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--8<-- "examples/patch_inplace.output"
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```
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??? example "Example: out_of_range.403 exception with a partially applied patch"
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The following code shows a patch whose first operation succeeds and whose second operation fails. Because
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`patch_inplace` applies each operation directly to the value, the first operation's effect is still visible after
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the exception is caught, unlike [`patch`](patch.md).
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```cpp
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--8<-- "examples/patch_inplace__exception.cpp"
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```
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Output:
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```json
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--8<-- "examples/patch_inplace__exception.output"
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```
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## See also
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- [RFC 6902 (JSON Patch)](https://tools.ietf.org/html/rfc6902)
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