Yuriy Chernyshov 3d28dd096e Fix -Wignored-reference-qualifiers ... In certain STLs, `std::vector<bool>::reference` is just `bool&`. Prepending `const` causes the following warning: ``` include/nlohmann/detail/conversions/to_json.hpp:271:42: error: 'const' qualifier on reference type 'std::vector<bool>::reference' (aka 'bool &') has no effect [-Werror,-Wignored-reference-qualifiers] ``` This PR fixes the problem.		2022-08-05 16:22:09 +03:00
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nlohmann	Fix -Wignored-reference-qualifiers	2022-08-05 16:22:09 +03:00