message: Amalgamate single include
diff: @@ -1321,6 +1321,16 @@ struct external_constructor<value_t::string>
  j.m_value = std::move(s);
  j.assert_invariant();
  }
  +
  + template<typename BasicJsonType, typename CompatibleStringType,
  + enable_if_t<not std::is_same<CompatibleStringType, typename BasicJsonType::string_t>::value,
  + int> = 0>
  + static void construct(BasicJsonType& j, const CompatibleStringType& str)
  + {
  + j.m_type = value_t::string;
  + j.m_value.string = j.template create<typename BasicJsonType::string_t>(str);
  + j.assert_invariant();
  + }
  };
  template<>
  @@ -12470,9 +12480,6 @@ class basic_json
  not detail::is_basic_json<ValueType>::value
  #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(JSON_HAS_CPP_17)
  - and not std::is_same<ValueType, typename std::string_view>::value
  #endif
  , int >::type = 0 >
  operator ValueType() const
  