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Reimplement value() access functions (#3663)

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* Reimplement value() access functions

* Merges the 'const char *' with the 'ValueType &&' overloads.
* Fixes ambiguities when default value is 0.
* Fixes 'no matching function' error when specifying ValueType template
  parameter.
* Fixes incorrect template parameter order in previous overloads.

* Add additional value() tests

* Make JSON_MultipleHeaders visible to unit tests

Define the macro JSON_TEST_USING_MULTIPLE_HEADERS to 0/1 depending on
JSON_MultipleHeaders.

* Add type_traits unit test

* Update documentation
This commit is contained in:
Florian Albrechtskirchinger
2022-08-07 13:54:55 +02:00
committed by GitHub
parent 8eee62d388
commit 0c7a18374c
7 changed files with 694 additions and 127 deletions
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docs/mkdocs/docs/api/basic_json/value.md
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@@ -7,7 +7,7 @@ ValueType value(const typename object_t::key_type& key,
ValueType&& default_value) const;
// (2)
template<class KeyType, class ValueType>
template<class ValueType, class KeyType>
ValueType value(KeyType&& key,
ValueType&& default_value) const;
@@ -155,5 +155,5 @@ changes to any JSON value.
## Version history
1. Added in version 1.0.0. Changed parameter `default_value` type from `const ValueType&` to `ValueType&&` in version 3.11.0.
2. Added in version 3.11.0.
2. Added in version 3.11.0. Made `ValueType` the first template parameter in version 3.11.2.
3. Added in version 2.0.2.