Florian Albrechtskirchinger 6b97599a27 Fix C++20/gcc-12 issues (Part 2) (#3446) ... * 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		2022-05-29 13:08:06 +02:00
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nlohmann	Fix C++20/gcc-12 issues (Part 2) (#3446)	2022-05-29 13:08:06 +02:00