🔨 check for value of _HAS_CXX17

parent 628be157
......@@ -3730,7 +3730,7 @@ class basic_json
#ifndef _MSC_VER // fix for issue #167 operator<< ambiguity under VS2015
and not std::is_same<ValueType, std::initializer_list<typename string_t::value_type>>::value
#endif
#if defined(_MSC_VER) && defined(_HAS_CXX17) // fix for issue #464
#if defined(_MSC_VER) && defined(_HAS_CXX17) && _HAS_CXX17 == 1 // fix for issue #464
and not std::is_same<ValueType, typename std::string_view>::value
#endif
, int >::type = 0 >
......
......@@ -3730,7 +3730,7 @@ class basic_json
#ifndef _MSC_VER // fix for issue #167 operator<< ambiguity under VS2015
and not std::is_same<ValueType, std::initializer_list<typename string_t::value_type>>::value
#endif
#if defined(_MSC_VER) && defined(_HAS_CXX17) // fix for issue #464
#if defined(_MSC_VER) && defined(_HAS_CXX17) && _HAS_CXX17 == 1 // fix for issue #464
and not std::is_same<ValueType, typename std::string_view>::value
#endif
, int >::type = 0 >
......
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