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Use std::iterator_traits to extract iterator_category #3544

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Jun 18, 2022
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2 changes: 1 addition & 1 deletion include/nlohmann/detail/iterators/iter_impl.hpp
Original file line number Diff line number Diff line change
Expand Up @@ -53,7 +53,7 @@ class iter_impl // NOLINT(cppcoreguidelines-special-member-functions,hicpp-speci
"iter_impl only accepts (const) basic_json");
// superficial check for the LegacyBidirectionalIterator named requirement
static_assert(std::is_base_of<std::bidirectional_iterator_tag, std::bidirectional_iterator_tag>::value
&& std::is_base_of<std::bidirectional_iterator_tag, typename array_t::iterator::iterator_category>::value,
&& std::is_base_of<std::bidirectional_iterator_tag, typename std::iterator_traits<typename array_t::iterator>::iterator_category>::value,
"basic_json iterator assumes array and object type iterators satisfy the LegacyBidirectionalIterator named requirement.");

public:
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