郑少锟 87cda1d664 Use std::iterator_traits to extract iterator_category (#3544) ... * Use `std::iterator_traits` to extract `iterator_category` In third-party STL implementations, `array_t::iterator` might be a pointer (e.g., `vector` in [EASTL](https://github.com/electronicarts/EASTL)) rather than a class, in which case directly using `array_t::iterator::iterator_category` is invalid. This commit fixes it with `std::iterator_traits`, which handles pointers correctly. * add the changes to the single-header version		2022-06-18 19:14:03 +02:00
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nlohmann	Use std::iterator_traits to extract iterator_category (#3544)	2022-06-18 19:14:03 +02:00