* 🚧 conversions for std::optional
* 🏁 fix <optional> inclusion
* 💚 overwork tests
* Use JSON_HAS_CPP_17 only after it has been defined
* ✅ update tests
* 🏁 include right <optional> header
* ♻️ do not include experimental headers
* Add missing #endif after rebase
* Fix failing test
* Only define conversion to std::optional when JSON_USE_IMPLICIT_CONVERSION is disabled.
* missing endif
* Remove Wfloat-equal suppress
* amalgamate
* Move include of optional out of macro_scope; probably does not make sense to be there
* Make clang-tidy happy
* Suppress lint instead of changing to 'contains'
---------
Co-authored-by: Niels Lohmann <mail@nlohmann.me>
Co-authored-by: Markus Palonen <markus.palonen@gmail.com>
* Add C++20 3-way comparison operator and fix broken comparisons
Fixes#3207.
Fixes#3409.
* Fix iterators to meet (more) std::ranges requirements
Fixes#3130.
Related discussion: #3408
* Add note about CMake standard version selection to unit tests
Document how CMake chooses which C++ standard version to use when
building tests.
* Update documentation
* CI: add legacy discarded value comparison
* Fix internal linkage errors when building a module