41 lines
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41 lines
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HTML
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md-icon"></span> API Documentation </label> <ul class=md-nav__list data-md-scrollfix> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle" data-md-toggle=__nav_4_1 type=checkbox id=__nav_4_1> <div class="md-nav__link md-nav__link--index "> <a href=../../api/basic_json/ >basic_json</a> <label for=__nav_4_1> <span class="md-nav__icon md-icon"></span> </label> </div> <nav class=md-nav aria-label=basic_json data-md-level=2> <label class=md-nav__title for=__nav_4_1> <span class="md-nav__icon md-icon"></span> basic_json </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../api/basic_json/basic_json/ class=md-nav__link> (Constructor) </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/~basic_json/ class=md-nav__link> (Destructor) </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/accept/ class=md-nav__link> accept </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/array/ class=md-nav__link> array </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/array_t/ class=md-nav__link> array_t </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/at/ class=md-nav__link> at </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/back/ class=md-nav__link> back </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/begin/ class=md-nav__link> begin </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/binary/ class=md-nav__link> binary </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/binary_t/ class=md-nav__link> binary_t </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/boolean_t/ class=md-nav__link> boolean_t </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/cbegin/ class=md-nav__link> cbegin </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/cbor_tag_handler_t/ class=md-nav__link> cbor_tag_handler_t </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/cend/ class=md-nav__link> cend </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/clear/ class=md-nav__link> clear </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/contains/ class=md-nav__link> contains </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/count/ class=md-nav__link> count </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/crbegin/ class=md-nav__link> crbegin </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/crend/ class=md-nav__link> crend </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/default_object_comparator_t/ class=md-nav__link> default_object_comparator_t </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/diff/ class=md-nav__link> diff </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/dump/ class=md-nav__link> dump </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/emplace/ class=md-nav__link> emplace </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/emplace_back/ class=md-nav__link> emplace_back </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/empty/ class=md-nav__link> empty </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/end/ class=md-nav__link> end </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/erase/ class=md-nav__link> erase </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/error_handler_t/ class=md-nav__link> error_handler_t </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/exception/ class=md-nav__link> exception </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/find/ class=md-nav__link> find </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/flatten/ class=md-nav__link> flatten </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/from_bjdata/ class=md-nav__link> from_bjdata </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/from_bson/ class=md-nav__link> from_bson </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/from_cbor/ class=md-nav__link> from_cbor </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/from_msgpack/ class=md-nav__link> from_msgpack </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/from_ubjson/ class=md-nav__link> from_ubjson </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/front/ class=md-nav__link> front </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/get/ class=md-nav__link> get </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/get_allocator/ class=md-nav__link> get_allocator </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/get_binary/ class=md-nav__link> get_binary </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/get_ptr/ class=md-nav__link> get_ptr </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/get_ref/ class=md-nav__link> get_ref </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/get_to/ class=md-nav__link> get_to </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/std_hash/ class=md-nav__link> std::hash<basic_json> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/input_format_t/ class=md-nav__link> input_format_t </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/insert/ class=md-nav__link> insert </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/invalid_iterator/ class=md-nav__link> invalid_iterator </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/is_array/ class=md-nav__link> is_array </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/is_binary/ class=md-nav__link> is_binary </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/is_boolean/ class=md-nav__link> is_boolean </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/is_discarded/ class=md-nav__link> is_discarded </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/is_null/ class=md-nav__link> is_null </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/is_number/ class=md-nav__link> is_number </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/is_number_float/ class=md-nav__link> is_number_float </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/is_number_integer/ class=md-nav__link> is_number_integer </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/is_number_unsigned/ class=md-nav__link> is_number_unsigned </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/is_object/ class=md-nav__link> is_object </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/is_primitive/ class=md-nav__link> is_primitive </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/is_string/ class=md-nav__link> is_string </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/is_structured/ class=md-nav__link> is_structured </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/items/ class=md-nav__link> items </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/json_base_class_t/ class=md-nav__link> json_base_class_t </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/json_serializer/ class=md-nav__link> json_serializer </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/max_size/ class=md-nav__link> max_size </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/meta/ class=md-nav__link> meta </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/merge_patch/ class=md-nav__link> merge_patch </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/number_float_t/ class=md-nav__link> number_float_t </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/number_integer_t/ class=md-nav__link> number_integer_t </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/number_unsigned_t/ class=md-nav__link> number_unsigned_t </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/object/ class=md-nav__link> object </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/object_comparator_t/ class=md-nav__link> object_comparator_t </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/object_t/ class=md-nav__link> object_t </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/operator_ValueType/ class=md-nav__link> operator ValueType </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/operator_value_t/ class=md-nav__link> operator value_t </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/operator%5B%5D/ class=md-nav__link> operator[] </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/operator%3D/ class=md-nav__link> operator= </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/operator%2B%3D/ class=md-nav__link> operator+= </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/operator_eq/ class=md-nav__link> operator== </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/operator_ne/ class=md-nav__link> operator!= </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/operator_lt/ class=md-nav__link> operator< </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/operator_gt/ class=md-nav__link> operator> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/operator_le/ class=md-nav__link> operator<= </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/operator_ge/ class=md-nav__link> operator>= </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/operator_spaceship/ class=md-nav__link> operator<=> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/out_of_range/ class=md-nav__link> out_of_range </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/other_error/ class=md-nav__link> other_error </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/parse/ class=md-nav__link> parse </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/parse_error/ class=md-nav__link> parse_error </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/parse_event_t/ class=md-nav__link> parse_event_t </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/parser_callback_t/ class=md-nav__link> parser_callback_t </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/patch/ class=md-nav__link> patch </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/patch_inplace/ class=md-nav__link> patch_inplace </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/push_back/ class=md-nav__link> push_back </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/rbegin/ class=md-nav__link> rbegin </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/rend/ class=md-nav__link> rend </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/sax_parse/ class=md-nav__link> sax_parse </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/size/ class=md-nav__link> size </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/string_t/ class=md-nav__link> string_t </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/swap/ class=md-nav__link> swap </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/std_swap/ class=md-nav__link> std::swap<basic_json> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/to_bjdata/ class=md-nav__link> to_bjdata </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/to_bson/ class=md-nav__link> to_bson </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/to_cbor/ class=md-nav__link> to_cbor </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/to_msgpack/ class=md-nav__link> to_msgpack </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/to_string/ class=md-nav__link> to_string </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/to_ubjson/ class=md-nav__link> to_ubjson </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/type/ class=md-nav__link> type </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/type_error/ class=md-nav__link> type_error </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/type_name/ class=md-nav__link> type_name </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/unflatten/ class=md-nav__link> unflatten </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/update/ class=md-nav__link> update </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/value/ class=md-nav__link> value </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/value_t/ class=md-nav__link> value_t </a> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle" data-md-toggle=__nav_4_2 type=checkbox id=__nav_4_2> <div class="md-nav__link md-nav__link--index "> <a href=../../api/byte_container_with_subtype/ >byte_container_with_subtype</a> <label for=__nav_4_2> <span class="md-nav__icon md-icon"></span> </label> </div> <nav class=md-nav aria-label=byte_container_with_subtype data-md-level=2> <label class=md-nav__title for=__nav_4_2> <span class="md-nav__icon md-icon"></span> byte_container_with_subtype </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../api/byte_container_with_subtype/byte_container_with_subtype/ class=md-nav__link> (constructor) </a> </li> <li class=md-nav__item> <a href=../../api/byte_container_with_subtype/clear_subtype/ class=md-nav__link> clear_subtype </a> </li> <li class=md-nav__item> <a href=../../api/byte_container_with_subtype/has_subtype/ class=md-nav__link> has_subtype </a> </li> <li class=md-nav__item> <a href=../../api/byte_container_with_subtype/set_subtype/ class=md-nav__link> set_subtype </a> </li> <li class=md-nav__item> <a href=../../api/byte_container_with_subtype/subtype/ class=md-nav__link> subtype </a> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle" data-md-toggle=__nav_4_3 type=checkbox id=__nav_4_3> <div class="md-nav__link md-nav__link--index "> <a href=../../api/adl_serializer/ >adl_serializer</a> <label for=__nav_4_3> <span class="md-nav__icon md-icon"></span> </label> </div> <nav class=md-nav aria-label=adl_serializer data-md-level=2> <label class=md-nav__title for=__nav_4_3> <span class="md-nav__icon md-icon"></span> adl_serializer </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../api/adl_serializer/from_json/ class=md-nav__link> from_json </a> </li> <li class=md-nav__item> <a href=../../api/adl_serializer/to_json/ class=md-nav__link> to_json </a> </li> </ul> </nav> </li> <li class=md-nav__item> <a href=../../api/json/ class=md-nav__link> json </a> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle" data-md-toggle=__nav_4_5 type=checkbox id=__nav_4_5> <div class="md-nav__link md-nav__link--index "> <a href=../../api/json_pointer/ >json_pointer</a> <label for=__nav_4_5> <span class="md-nav__icon md-icon"></span> </label> </div> <nav class=md-nav aria-label=json_pointer data-md-level=2> <label class=md-nav__title for=__nav_4_5> <span class="md-nav__icon md-icon"></span> json_pointer </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../api/json_pointer/json_pointer/ class=md-nav__link> (Constructor) </a> </li> <li class=md-nav__item> <a href=../../api/json_pointer/back/ class=md-nav__link> back </a> </li> <li class=md-nav__item> <a href=../../api/json_pointer/empty/ class=md-nav__link> empty </a> </li> <li class=md-nav__item> <a href=../../api/json_pointer/operator_string_t/ class=md-nav__link> operator string_t </a> </li> <li class=md-nav__item> <a href=../../api/json_pointer/operator_eq/ class=md-nav__link> operator== </a> </li> <li class=md-nav__item> <a href=../../api/json_pointer/operator_ne/ class=md-nav__link> operator!= </a> </li> <li class=md-nav__item> <a href=../../api/json_pointer/operator_slash/ class=md-nav__link> operator/ </a> </li> <li class=md-nav__item> <a href=../../api/json_pointer/operator_slasheq/ class=md-nav__link> operator/= </a> </li> <li class=md-nav__item> <a href=../../api/json_pointer/parent_pointer/ class=md-nav__link> parent_pointer </a> </li> <li class=md-nav__item> <a href=../../api/json_pointer/pop_back/ class=md-nav__link> pop_back </a> </li> <li class=md-nav__item> <a href=../../api/json_pointer/push_back/ class=md-nav__link> push_back </a> </li> <li class=md-nav__item> <a href=../../api/json_pointer/string_t/ class=md-nav__link> string_t </a> </li> <li class=md-nav__item> <a href=../../api/json_pointer/to_string/ class=md-nav__link> to_string </a> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle" data-md-toggle=__nav_4_6 type=checkbox id=__nav_4_6> <div class="md-nav__link md-nav__link--index "> <a href=../../api/json_sax/ >json_sax</a> <label for=__nav_4_6> <span class="md-nav__icon md-icon"></span> </label> </div> <nav class=md-nav aria-label=json_sax data-md-level=2> <label class=md-nav__title for=__nav_4_6> <span class="md-nav__icon md-icon"></span> json_sax </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../api/json_sax/binary/ class=md-nav__link> binary </a> </li> <li class=md-nav__item> <a href=../../api/json_sax/boolean/ class=md-nav__link> boolean </a> </li> <li class=md-nav__item> <a href=../../api/json_sax/end_array/ class=md-nav__link> end_array </a> </li> <li class=md-nav__item> <a href=../../api/json_sax/end_object/ class=md-nav__link> end_object </a> </li> <li class=md-nav__item> <a href=../../api/json_sax/key/ class=md-nav__link> key </a> </li> <li class=md-nav__item> <a href=../../api/json_sax/null/ class=md-nav__link> null </a> </li> <li class=md-nav__item> <a href=../../api/json_sax/number_float/ class=md-nav__link> number_float </a> </li> <li class=md-nav__item> <a href=../../api/json_sax/number_integer/ class=md-nav__link> number_integer </a> </li> <li class=md-nav__item> <a href=../../api/json_sax/number_unsigned/ class=md-nav__link> number_unsigned </a> </li> <li class=md-nav__item> <a href=../../api/json_sax/parse_error/ class=md-nav__link> parse_error </a> </li> <li class=md-nav__item> <a href=../../api/json_sax/start_array/ class=md-nav__link> start_array </a> </li> <li class=md-nav__item> <a href=../../api/json_sax/start_object/ class=md-nav__link> start_object </a> </li> <li class=md-nav__item> <a href=../../api/json_sax/string/ class=md-nav__link> string </a> </li> </ul> </nav> </li> <li class=md-nav__item> <a href=../../api/operator_ltlt/ class=md-nav__link> operator<<(basic_json) </a> </li> <li class=md-nav__item> <a href=../../api/operator_ltlt/ class=md-nav__link> operator<<(json_pointer) </a> </li> <li class=md-nav__item> <a href=../../api/operator_gtgt/ class=md-nav__link> operator>>(basic_json) </a> </li> <li class=md-nav__item> <a href=../../api/operator_literal_json/ class=md-nav__link> operator""_json </a> </li> <li class=md-nav__item> <a href=../../api/operator_literal_json_pointer/ class=md-nav__link> operator""_json_pointer </a> </li> <li class=md-nav__item> <a href=../../api/ordered_json/ class=md-nav__link> ordered_json </a> </li> <li class=md-nav__item> <a href=../../api/ordered_map/ class=md-nav__link> ordered_map </a> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle" data-md-toggle=__nav_4_14 type=checkbox id=__nav_4_14> <div class="md-nav__link md-nav__link--index "> <a href=../../api/macros/ >macros</a> <label for=__nav_4_14> <span class="md-nav__icon md-icon"></span> </label> </div> <nav class=md-nav aria-label=macros data-md-level=2> <label class=md-nav__title for=__nav_4_14> <span class="md-nav__icon md-icon"></span> macros </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../api/macros/json_assert/ class=md-nav__link> JSON_ASSERT </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_throw_user/ class=md-nav__link> JSON_CATCH_USER </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_diagnostics/ class=md-nav__link> JSON_DIAGNOSTICS </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_disable_enum_serialization/ class=md-nav__link> JSON_DISABLE_ENUM_SERIALIZATION </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_has_cpp_11/ class=md-nav__link> JSON_HAS_CPP_11 </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_has_cpp_11/ class=md-nav__link> JSON_HAS_CPP_14 </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_has_cpp_11/ class=md-nav__link> JSON_HAS_CPP_17 </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_has_cpp_11/ class=md-nav__link> JSON_HAS_CPP_20 </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_has_filesystem/ class=md-nav__link> JSON_HAS_EXPERIMENTAL_FILESYSTEM </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_has_filesystem/ class=md-nav__link> JSON_HAS_FILESYSTEM </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_has_ranges/ class=md-nav__link> JSON_HAS_RANGES </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_has_three_way_comparison/ class=md-nav__link> JSON_HAS_THREE_WAY_COMPARISON </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_noexception/ class=md-nav__link> JSON_NOEXCEPTION </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_no_io/ class=md-nav__link> JSON_NO_IO </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_skip_library_version_check/ class=md-nav__link> JSON_SKIP_LIBRARY_VERSION_CHECK </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_skip_unsupported_compiler_check/ class=md-nav__link> JSON_SKIP_UNSUPPORTED_COMPILER_CHECK </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_throw_user/ class=md-nav__link> JSON_THROW_USER </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_throw_user/ class=md-nav__link> JSON_TRY_USER </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_use_global_udls/ class=md-nav__link> JSON_USE_GLOBAL_UDLS </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_use_implicit_conversions/ class=md-nav__link> JSON_USE_IMPLICIT_CONVERSIONS </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_use_legacy_discarded_value_comparison/ class=md-nav__link> JSON_USE_LEGACY_DISCARDED_VALUE_COMPARISON </a> </li> <li class=md-nav__item> <a href=../../api/macros/nlohmann_define_type_intrusive/ class=md-nav__link> NLOHMANN_DEFINE_TYPE_INTRUSIVE </a> </li> <li class=md-nav__item> <a href=../../api/macros/nlohmann_define_type_intrusive/ class=md-nav__link> NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_DEFAULT </a> </li> <li class=md-nav__item> <a href=../../api/macros/nlohmann_define_type_non_intrusive/ class=md-nav__link> NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE </a> </li> <li class=md-nav__item> <a href=../../api/macros/nlohmann_define_type_non_intrusive/ class=md-nav__link> NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_WITH_DEFAULT </a> </li> <li class=md-nav__item> <a href=../../api/macros/nlohmann_json_namespace/ class=md-nav__link> NLOHMANN_JSON_NAMESPACE </a> </li> <li class=md-nav__item> <a href=../../api/macros/nlohmann_json_namespace_begin/ class=md-nav__link> NLOHMANN_JSON_NAMESPACE_BEGIN </a> </li> <li class=md-nav__item> <a href=../../api/macros/nlohmann_json_namespace_begin/ class=md-nav__link> NLOHMANN_JSON_NAMESPACE_END </a> </li> <li class=md-nav__item> <a href=../../api/macros/nlohmann_json_namespace_no_version/ class=md-nav__link> NLOHMANN_JSON_NAMESPACE_NO_VERSION </a> </li> <li class=md-nav__item> <a href=../../api/macros/nlohmann_json_serialize_enum/ class=md-nav__link> NLOHMANN_JSON_SERIALIZE_ENUM </a> </li> <li class=md-nav__item> <a href=../../api/macros/nlohmann_json_version_major/ class=md-nav__link> NLOHMANN_JSON_VERSION_MAJOR </a> </li> <li class=md-nav__item> <a href=../../api/macros/nlohmann_json_version_major/ class=md-nav__link> NLOHMANN_JSON_VERSION_MINOR </a> </li> <li class=md-nav__item> <a href=../../api/macros/nlohmann_json_version_major/ class=md-nav__link> NLOHMANN_JSON_VERSION_PATCH </a> </li> </ul> </nav> </li> </ul> </nav> </li> </ul> </nav> </div> </div> </div> <div class="md-sidebar md-sidebar--secondary" data-md-component=sidebar data-md-type=toc> <div class=md-sidebar__scrollwrap> <div class=md-sidebar__inner> <nav class="md-nav md-nav--secondary" aria-label="Table of contents"> <label class=md-nav__title for=__toc> <span class="md-nav__icon md-icon"></span> Table of contents </label> <ul class=md-nav__list data-md-component=toc data-md-scrollfix> <li class=md-nav__item> <a href=#switch-off-runtime-assertions class=md-nav__link> Switch off runtime assertions </a> </li> <li class=md-nav__item> <a href=#change-assertion-behavior class=md-nav__link> Change assertion behavior </a> </li> <li class=md-nav__item> <a href=#function-with-runtime-assertions class=md-nav__link> Function with runtime assertions </a> <nav class=md-nav aria-label="Function with runtime assertions"> <ul class=md-nav__list> <li class=md-nav__item> <a href=#unchecked-object-access-to-a-const-value class=md-nav__link> Unchecked object access to a const value </a> </li> <li class=md-nav__item> <a href=#constructing-from-an-uninitialized-iterator-range class=md-nav__link> Constructing from an uninitialized iterator range </a> </li> <li class=md-nav__item> <a href=#operations-on-uninitialized-iterators class=md-nav__link> Operations on uninitialized iterators </a> </li> <li class=md-nav__item> <a href=#reading-from-a-null-file-pointer class=md-nav__link> Reading from a null FILE pointer </a> </li> </ul> </nav> </li> </ul> </nav> </div> </div> </div> <div class=md-content data-md-component=content> <article class="md-content__inner md-typeset"> <a href=https://github.com/nlohmann/json/edit/develop/docs/mkdocs/docs/features/assertions.md title="Edit this page" class="md-content__button md-icon"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M20.71 7.04c.39-.39.39-1.04 0-1.41l-2.34-2.34c-.37-.39-1.02-.39-1.41 0l-1.84 1.83 3.75 3.75M3 17.25V21h3.75L17.81 9.93l-3.75-3.75L3 17.25Z"/></svg> </a> <h1 id=runtime-assertions>Runtime Assertions<a class=headerlink href=#runtime-assertions title="Permanent link">¶</a></h1> <p>The code contains numerous debug assertions to ensure class invariants are valid or to detect undefined behavior. Whereas the former class invariants are nothing to be concerned of, the latter checks for undefined behavior are to detect bugs in client code.</p> <h2 id=switch-off-runtime-assertions>Switch off runtime assertions<a class=headerlink href=#switch-off-runtime-assertions title="Permanent link">¶</a></h2> <p>Runtime assertions can be switched off by defining the preprocessor macro <code>NDEBUG</code> (see the <a href=https://en.cppreference.com/w/cpp/error/assert>documentation of assert</a>) which is the default for release builds.</p> <h2 id=change-assertion-behavior>Change assertion behavior<a class=headerlink href=#change-assertion-behavior title="Permanent link">¶</a></h2> <p>The behavior of runtime assertions can be changes by defining macro <a href=../../api/macros/json_assert/ ><code>JSON_ASSERT(x)</code></a> before including the <code>json.hpp</code> header.</p> <h2 id=function-with-runtime-assertions>Function with runtime assertions<a class=headerlink href=#function-with-runtime-assertions title="Permanent link">¶</a></h2> <h3 id=unchecked-object-access-to-a-const-value>Unchecked object access to a const value<a class=headerlink href=#unchecked-object-access-to-a-const-value title="Permanent link">¶</a></h3> <p>Function <a href=../../api/basic_json/operator%5B%5D/ ><code>operator[]</code></a> implements unchecked access for objects. Whereas a missing key is added in case of non-const objects, accessing a const object with a missing key is undefined behavior (think of a dereferenced null pointer) and yields a runtime assertion.</p> <p>If you are not sure whether an element in an object exists, use checked access with the <a href=../../api/basic_json/at/ ><code>at</code> function</a> or call the <a href=../../api/basic_json/contains/ ><code>contains</code> function</a> before.</p> <p>See also the documentation on <a href=../element_access/ >element access</a>.</p> <details class=example> <summary>Example 1: Missing object key</summary> <p>The following code will trigger an assertion at runtime:</p> <div class=highlight><pre><span></span><code><span class=cp>#include</span><span class=w> </span><span class=cpf><nlohmann/json.hpp></span><span class=cp></span>
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<span class=k>using</span><span class=w> </span><span class=n>json</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=n>nlohmann</span><span class=o>::</span><span class=n>json</span><span class=p>;</span><span class=w></span>
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<span class=kt>int</span><span class=w> </span><span class=nf>main</span><span class=p>()</span><span class=w></span>
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<span class=p>{</span><span class=w></span>
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<span class=w> </span><span class=k>const</span><span class=w> </span><span class=n>json</span><span class=w> </span><span class=n>j</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=p>{{</span><span class=s>"key"</span><span class=p>,</span><span class=w> </span><span class=s>"value"</span><span class=p>}};</span><span class=w></span>
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<span class=w> </span><span class=k>auto</span><span class=w> </span><span class=n>v</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=n>j</span><span class=p>[</span><span class=s>"missing"</span><span class=p>];</span><span class=w></span>
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<span class=p>}</span><span class=w></span>
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</code></pre></div> <p>Output:</p> <div class=highlight><pre><span></span><code>Assertion failed: (m_value.object->find(key) != m_value.object->end()), function operator[], file json.hpp, line 2144.
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</code></pre></div> </details> <h3 id=constructing-from-an-uninitialized-iterator-range>Constructing from an uninitialized iterator range<a class=headerlink href=#constructing-from-an-uninitialized-iterator-range title="Permanent link">¶</a></h3> <p>Constructing a JSON value from an iterator range (see <a href=../../api/basic_json/basic_json/ >constructor</a>) with an uninitialized iterator is undefined behavior and yields a runtime assertion.</p> <details class=example> <summary>Example 2: Uninitialized iterator range</summary> <p>The following code will trigger an assertion at runtime:</p> <div class=highlight><pre><span></span><code><span class=cp>#include</span><span class=w> </span><span class=cpf><nlohmann/json.hpp></span><span class=cp></span>
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<span class=k>using</span><span class=w> </span><span class=n>json</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=n>nlohmann</span><span class=o>::</span><span class=n>json</span><span class=p>;</span><span class=w></span>
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<span class=kt>int</span><span class=w> </span><span class=nf>main</span><span class=p>()</span><span class=w></span>
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<span class=p>{</span><span class=w></span>
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<span class=w> </span><span class=n>json</span><span class=o>::</span><span class=n>iterator</span><span class=w> </span><span class=n>it1</span><span class=p>,</span><span class=w> </span><span class=n>it2</span><span class=p>;</span><span class=w></span>
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<span class=w> </span><span class=n>json</span><span class=w> </span><span class=n>j</span><span class=p>(</span><span class=n>it1</span><span class=p>,</span><span class=w> </span><span class=n>it2</span><span class=p>);</span><span class=w></span>
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<span class=p>}</span><span class=w></span>
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</code></pre></div> <p>Output:</p> <div class=highlight><pre><span></span><code>Assertion failed: (m_object != nullptr), function operator++, file iter_impl.hpp, line 368.
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</code></pre></div> </details> <h3 id=operations-on-uninitialized-iterators>Operations on uninitialized iterators<a class=headerlink href=#operations-on-uninitialized-iterators title="Permanent link">¶</a></h3> <p>Any operation on uninitialized iterators (i.e., iterators that are not associated with any JSON value) is undefined behavior and yields a runtime assertion.</p> <details class=example> <summary>Example 3: Uninitialized iterator</summary> <p>The following code will trigger an assertion at runtime:</p> <div class=highlight><pre><span></span><code><span class=cp>#include</span><span class=w> </span><span class=cpf><nlohmann/json.hpp></span><span class=cp></span>
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<span class=k>using</span><span class=w> </span><span class=n>json</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=n>nlohmann</span><span class=o>::</span><span class=n>json</span><span class=p>;</span><span class=w></span>
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<span class=kt>int</span><span class=w> </span><span class=nf>main</span><span class=p>()</span><span class=w></span>
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<span class=p>{</span><span class=w></span>
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<span class=w> </span><span class=n>json</span><span class=o>::</span><span class=n>iterator</span><span class=w> </span><span class=n>it</span><span class=p>;</span><span class=w></span>
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<span class=w> </span><span class=o>++</span><span class=n>it</span><span class=p>;</span><span class=w></span>
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<span class=p>}</span><span class=w></span>
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</code></pre></div> <p>Output:</p> <div class=highlight><pre><span></span><code>Assertion failed: (m_object != nullptr), function operator++, file iter_impl.hpp, line 368.
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</code></pre></div> </details> <h3 id=reading-from-a-null-file-pointer>Reading from a null <code>FILE</code> pointer<a class=headerlink href=#reading-from-a-null-file-pointer title="Permanent link">¶</a></h3> <p>Reading from a null <code class=highlight><span class=kt>FILE</span><span class=w></span></code> pointer is undefined behavior and yields a runtime assertion. This can happen when calling <code class=highlight><span class=n>std</span><span class=o>::</span><span class=n>fopen</span><span class=w></span></code> on a nonexistent file.</p> <details class=example> <summary>Example 4: Uninitialized iterator</summary> <p>The following code will trigger an assertion at runtime:</p> <div class=highlight><pre><span></span><code><span class=cp>#include</span><span class=w> </span><span class=cpf><nlohmann/json.hpp></span><span class=cp></span>
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<span class=k>using</span><span class=w> </span><span class=n>json</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=n>nlohmann</span><span class=o>::</span><span class=n>json</span><span class=p>;</span><span class=w></span>
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<span class=kt>int</span><span class=w> </span><span class=nf>main</span><span class=p>()</span><span class=w></span>
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<span class=p>{</span><span class=w></span>
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<span class=w> </span><span class=n>std</span><span class=o>::</span><span class=kt>FILE</span><span class=o>*</span><span class=w> </span><span class=n>f</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=n>std</span><span class=o>::</span><span class=n>fopen</span><span class=p>(</span><span class=s>"nonexistent_file.json"</span><span class=p>,</span><span class=w> </span><span class=s>"r"</span><span class=p>);</span><span class=w></span>
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<span class=w> </span><span class=n>json</span><span class=w> </span><span class=n>j</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=n>json</span><span class=o>::</span><span class=n>parse</span><span class=p>(</span><span class=n>f</span><span class=p>);</span><span class=w></span>
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<span class=p>}</span><span class=w></span>
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</code></pre></div> <p>Output:</p> <div class=highlight><pre><span></span><code>Assertion failed: (m_file != nullptr), function file_input_adapter, file input_adapters.hpp, line 55.
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</code></pre></div> </details> <hr> <div class=md-source-file> <small> Last update: <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date">March 8, 2023</span> </small> </div> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var tab,labels=set.querySelector(".tabbed-labels");for(tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> </div> <a href=# class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8v12Z"/></svg> Back to top </a> </main> <footer class=md-footer> <nav class="md-footer__inner md-grid" aria-label=Footer> <a href=../parsing/sax_interface/ class="md-footer__link md-footer__link--prev" aria-label="Previous: SAX Interface" rel=prev> <div class="md-footer__button md-icon"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M20 11v2H8l5.5 5.5-1.42 1.42L4.16 12l7.92-7.92L13.5 5.5 8 11h12Z"/></svg> </div> <div class=md-footer__title> <div class=md-ellipsis> <span class=md-footer__direction> Previous </span> SAX Interface </div> </div> </a> <a href=../enum_conversion/ class="md-footer__link md-footer__link--next" aria-label="Next: Specializing enum conversion" rel=next> <div class=md-footer__title> <div class=md-ellipsis> <span class=md-footer__direction> Next </span> Specializing enum conversion </div> </div> <div class="md-footer__button md-icon"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M4 11v2h12l-5.5 5.5 1.42 1.42L19.84 12l-7.92-7.92L10.5 5.5 16 11H4Z"/></svg> </div> </a> </nav> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013 - 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