JSON Classes array basic_parser key_value_pair monotonic_resource object parser parse_options serializer static_resource storage_ptr stream_parser string value value_ref value_stack Functions get get_null_resource make_shared_resource parse serialize to_string value_from value_to visit Type Traits has_value_from has_value_to is_deallocate_trivial value_from_tag value_to_tag Operators operator== operator!= operator< operator<= operator>= operator> operator<< Constants array_kind condition error kind object_kind string_kind Aliases error_category error_code error_condition generic_category memory_resource polymorphic_allocator string_view system_error P0308R0 pilfer pilfered is_pilfer_constructible