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href=../../home/releases/v2.0.8/ class=md-nav__link> <span class=md-ellipsis> v2.0.8 </span> </a> </li> <li class=md-nav__item> <a href=../../home/releases/v2.0.7/ class=md-nav__link> <span class=md-ellipsis> v2.0.7 </span> </a> </li> <li class=md-nav__item> <a href=../../home/releases/v2.0.6/ class=md-nav__link> <span class=md-ellipsis> v2.0.6 </span> </a> </li> <li class=md-nav__item> <a href=../../home/releases/v2.0.5/ class=md-nav__link> <span class=md-ellipsis> v2.0.5 </span> </a> </li> <li class=md-nav__item> <a href=../../home/releases/v2.0.4/ class=md-nav__link> <span class=md-ellipsis> v2.0.4 </span> </a> </li> <li class=md-nav__item> <a href=../../home/releases/v2.0.3/ class=md-nav__link> <span class=md-ellipsis> v2.0.3 </span> </a> </li> <li class=md-nav__item> <a href=../../home/releases/v2.0.2/ class=md-nav__link> <span class=md-ellipsis> v2.0.2 </span> </a> </li> <li class=md-nav__item> <a href=../../home/releases/v2.0.1/ class=md-nav__link> <span class=md-ellipsis> v2.0.1 </span> </a> </li> <li class=md-nav__item> <a href=../../home/releases/v2.0.0/ class=md-nav__link> <span class=md-ellipsis> v2.0.0 </span> </a> </li> <li class=md-nav__item> <a href=../../home/releases/v1.1.0/ class=md-nav__link> <span class=md-ellipsis> v1.1.0 </span> </a> </li> <li class=md-nav__item> <a href=../../home/releases/v1.0.0/ class=md-nav__link> <span class=md-ellipsis> v1.0.0 </span> </a> </li> </ul> </nav> </li> <li class=md-nav__item> <a href=../../home/design_goals/ class=md-nav__link> <span class=md-ellipsis> Design goals </span> </a> </li> <li class=md-nav__item> <a href=../../home/architecture/ class=md-nav__link> <span class=md-ellipsis> Architecture </span> </a> </li> <li class=md-nav__item> <a href=../../home/customers/ class=md-nav__link> <span class=md-ellipsis> Customers </span> </a> </li> <li class=md-nav__item> <a href=../../home/sponsors/ class=md-nav__link> <span class=md-ellipsis> Sponsors </span> </a> </li> <li class=md-nav__item> <a href=../../home/debugging/ class=md-nav__link> <span class=md-ellipsis> Debugging </span> </a> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type=checkbox id=__nav_2> <div class="md-nav__link md-nav__container"> <a href=../../features/ class="md-nav__link "> <span class=md-ellipsis> Features </span> </a> <label class="md-nav__link " for=__nav_2 id=__nav_2_label tabindex=0> <span class="md-nav__icon md-icon"></span> </label> </div> <nav class=md-nav data-md-level=1 aria-labelledby=__nav_2_label aria-expanded=false> <label class=md-nav__title for=__nav_2> <span class="md-nav__icon md-icon"></span> Features </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../features/arbitrary_types/ class=md-nav__link> <span class=md-ellipsis> Arbitrary Type Conversions </span> </a> </li> <li class=md-nav__item> <a href=../../features/type_recipes/ class=md-nav__link> <span class=md-ellipsis> Recipes for Common Types </span> </a> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type=checkbox id=__nav_2_4> <div class="md-nav__link md-nav__container"> <a href=../../features/binary_formats/ class="md-nav__link "> <span class=md-ellipsis> Binary Formats </span> </a> <label class="md-nav__link " for=__nav_2_4 id=__nav_2_4_label tabindex=0> <span class="md-nav__icon md-icon"></span> </label> </div> <nav class=md-nav data-md-level=2 aria-labelledby=__nav_2_4_label aria-expanded=false> <label class=md-nav__title for=__nav_2_4> <span class="md-nav__icon md-icon"></span> Binary Formats </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../features/binary_formats/bjdata/ class=md-nav__link> <span class=md-ellipsis> BJData </span> </a> </li> <li class=md-nav__item> <a href=../../features/binary_formats/bon8/ class=md-nav__link> <span class=md-ellipsis> BON8 </span> </a> </li> <li class=md-nav__item> <a href=../../features/binary_formats/bson/ class=md-nav__link> <span class=md-ellipsis> BSON </span> </a> </li> <li class=md-nav__item> <a href=../../features/binary_formats/cbor/ class=md-nav__link> <span class=md-ellipsis> CBOR </span> </a> </li> <li class=md-nav__item> <a href=../../features/binary_formats/messagepack/ class=md-nav__link> <span class=md-ellipsis> MessagePack </span> </a> </li> <li class=md-nav__item> <a href=../../features/binary_formats/ubjson/ class=md-nav__link> <span class=md-ellipsis> UBJSON </span> </a> </li> </ul> </nav> </li> <li class=md-nav__item> <a href=../../features/binary_values/ class=md-nav__link> <span class=md-ellipsis> Binary Values </span> </a> </li> <li class=md-nav__item> <a href=../../features/comments/ class=md-nav__link> <span class=md-ellipsis> Comments </span> </a> </li> <li class=md-nav__item> <a href=../../features/conversions/ class=md-nav__link> <span class=md-ellipsis> Converting values </span> </a> </li> <li class=md-nav__item> <a href=../../features/creating_values/ class=md-nav__link> <span class=md-ellipsis> Creating JSON values </span> </a> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type=checkbox id=__nav_2_9> <div class="md-nav__link md-nav__container"> <a href=../../features/element_access/ class="md-nav__link "> <span class=md-ellipsis> Element Access </span> </a> <label class="md-nav__link " for=__nav_2_9 id=__nav_2_9_label tabindex=0> <span class="md-nav__icon md-icon"></span> </label> </div> <nav class=md-nav data-md-level=2 aria-labelledby=__nav_2_9_label aria-expanded=false> <label class=md-nav__title for=__nav_2_9> <span class="md-nav__icon md-icon"></span> Element Access </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../features/element_access/unchecked_access/ class=md-nav__link> <span class=md-ellipsis> Unchecked access: operator[] </span> </a> </li> <li class=md-nav__item> <a href=../../features/element_access/checked_access/ class=md-nav__link> <span class=md-ellipsis> Checked access: at </span> </a> </li> <li class=md-nav__item> <a href=../../features/element_access/default_value/ class=md-nav__link> <span class=md-ellipsis> Access with default value: value </span> </a> </li> </ul> </nav> </li> <li class=md-nav__item> <a href=../../features/iterators/ class=md-nav__link> <span class=md-ellipsis> Iterators </span> </a> </li> <li class=md-nav__item> <a href=../../features/merge_patch/ class=md-nav__link> <span class=md-ellipsis> JSON Merge Patch </span> </a> </li> <li class=md-nav__item> <a href=../../features/json_patch/ class=md-nav__link> <span class=md-ellipsis> JSON Patch and Diff </span> </a> </li> <li class=md-nav__item> <a href=../../features/json_pointer/ class=md-nav__link> <span class=md-ellipsis> JSON Pointer </span> </a> </li> <li class=md-nav__item> <a href=../../features/modifying_values/ class=md-nav__link> <span class=md-ellipsis> Modifying values </span> </a> </li> <li class=md-nav__item> <a href=../../features/modules/ class=md-nav__link> <span class=md-ellipsis> Modules </span> </a> </li> <li class=md-nav__item> <a href=../../features/namespace/ class=md-nav__link> <span class=md-ellipsis> nlohmann Namespace </span> </a> </li> <li class=md-nav__item> <a href=../../features/no_exceptions/ class=md-nav__link> <span class=md-ellipsis> Working Without Exceptions </span> </a> </li> <li class=md-nav__item> <a href=../../features/object_order/ class=md-nav__link> <span class=md-ellipsis> Object Order </span> </a> </li> <li class=md-nav__item> <a href=../../features/performance/ class=md-nav__link> <span class=md-ellipsis> Performance </span> </a> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type=checkbox id=__nav_2_20> <div class="md-nav__link md-nav__container"> <a href=../../features/parsing/ class="md-nav__link "> <span class=md-ellipsis> Parsing </span> </a> <label class="md-nav__link " for=__nav_2_20 id=__nav_2_20_label tabindex=0> <span class="md-nav__icon md-icon"></span> </label> </div> <nav class=md-nav data-md-level=2 aria-labelledby=__nav_2_20_label aria-expanded=false> <label class=md-nav__title for=__nav_2_20> <span class="md-nav__icon md-icon"></span> Parsing </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../features/parsing/json_lines/ class=md-nav__link> <span class=md-ellipsis> JSON Lines </span> </a> </li> <li class=md-nav__item> <a href=../../features/parsing/large_and_partial_input/ class=md-nav__link> <span class=md-ellipsis> Large, Streamed, and Partial Input </span> </a> </li> <li class=md-nav__item> <a href=../../features/parsing/parse_exceptions/ class=md-nav__link> <span class=md-ellipsis> Parsing and Exceptions </span> </a> </li> <li class=md-nav__item> <a href=../../features/parsing/parser_callbacks/ class=md-nav__link> <span class=md-ellipsis> Parser Callbacks </span> </a> </li> <li class=md-nav__item> <a href=../../features/parsing/sax_interface/ class=md-nav__link> <span class=md-ellipsis> SAX Interface </span> </a> </li> <li class=md-nav__item> <a href=../../features/parsing/untrusted_input/ class=md-nav__link> <span class=md-ellipsis> Parsing Untrusted Input </span> </a> </li> </ul> </nav> </li> <li class=md-nav__item> <a href=../../features/assertions/ class=md-nav__link> <span class=md-ellipsis> Runtime Assertions </span> </a> </li> <li class=md-nav__item> <a href=../../features/serialization/ class=md-nav__link> <span class=md-ellipsis> Serialization </span> </a> </li> <li class=md-nav__item> <a href=../../features/enum_conversion/ class=md-nav__link> <span class=md-ellipsis> Specializing enum conversion </span> </a> </li> <li class=md-nav__item> <a href=../../features/macros/ class=md-nav__link> <span class=md-ellipsis> Supported Macros </span> </a> </li> <li class=md-nav__item> <a href=../../features/trailing_commas/ class=md-nav__link> <span class=md-ellipsis> Trailing Commas </span> </a> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type=checkbox id=__nav_2_26> <div class="md-nav__link md-nav__container"> <a href=../../features/types/ class="md-nav__link "> <span class=md-ellipsis> Types </span> </a> <label class="md-nav__link " for=__nav_2_26 id=__nav_2_26_label tabindex=0> <span class="md-nav__icon md-icon"></span> </label> </div> <nav class=md-nav data-md-level=2 aria-labelledby=__nav_2_26_label aria-expanded=false> <label class=md-nav__title for=__nav_2_26> <span class="md-nav__icon md-icon"></span> Types </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../features/types/number_handling/ class=md-nav__link> <span class=md-ellipsis> Number Handling </span> </a> </li> <li class=md-nav__item> <a href=../../features/types/template_parameters/ class=md-nav__link> <span class=md-ellipsis> Template Parameter Requirements </span> </a> </li> </ul> </nav> </li> <li class=md-nav__item> <a href=../../features/json_view/ class=md-nav__link> <span class=md-ellipsis> Zero-copy JSON views </span> </a> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type=checkbox id=__nav_3> <div class="md-nav__link md-nav__container"> <a href=../../integration/ class="md-nav__link "> <span class=md-ellipsis> Integration </span> </a> <label class="md-nav__link " for=__nav_3 id=__nav_3_label tabindex=0> <span class="md-nav__icon md-icon"></span> </label> </div> <nav class=md-nav data-md-level=1 aria-labelledby=__nav_3_label aria-expanded=false> <label class=md-nav__title for=__nav_3> <span class="md-nav__icon md-icon"></span> Integration </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../integration/migration_guide/ class=md-nav__link> <span class=md-ellipsis> Migration Guide </span> </a> </li> <li class=md-nav__item> <a href=../../integration/cmake/ class=md-nav__link> <span class=md-ellipsis> CMake </span> </a> </li> <li class=md-nav__item> <a href=../../integration/package_managers/ class=md-nav__link> <span class=md-ellipsis> Package Managers </span> </a> </li> <li class=md-nav__item> <a href=../../integration/pkg-config/ class=md-nav__link> <span class=md-ellipsis> Pkg-config </span> </a> </li> <li class=md-nav__item> <a href=../../integration/compile_times/ class=md-nav__link> <span class=md-ellipsis> Compile times </span> </a> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type=checkbox id=__nav_4> <label class=md-nav__link for=__nav_4 id=__nav_4_label tabindex=0> <span class=md-ellipsis> API Documentation </span> <span class="md-nav__icon md-icon"></span> </label> <nav class=md-nav data-md-level=1 aria-labelledby=__nav_4_label aria-expanded=false> <label class=md-nav__title for=__nav_4> <span class="md-nav__icon 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 " type=checkbox id=__nav_4_1> <div class="md-nav__link md-nav__container"> <a href=../../api/basic_json/ class="md-nav__link "> <span class=md-ellipsis> basic_json </span> </a> <label class="md-nav__link " for=__nav_4_1 id=__nav_4_1_label tabindex=0> <span class="md-nav__icon md-icon"></span> </label> </div> <nav class=md-nav data-md-level=2 aria-labelledby=__nav_4_1_label aria-expanded=false> <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> <span class=md-ellipsis> (Constructor) </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/~basic_json/ class=md-nav__link> <span class=md-ellipsis> (Destructor) </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/accept/ class=md-nav__link> <span class=md-ellipsis> accept </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/array/ class=md-nav__link> <span class=md-ellipsis> array </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/array_t/ class=md-nav__link> <span class=md-ellipsis> array_t </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/as_base_class/ class=md-nav__link> <span class=md-ellipsis> as_base_class </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/at/ class=md-nav__link> <span class=md-ellipsis> at </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/back/ class=md-nav__link> <span class=md-ellipsis> back </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/begin/ class=md-nav__link> <span class=md-ellipsis> begin </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/binary/ class=md-nav__link> <span class=md-ellipsis> binary </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/binary_t/ class=md-nav__link> <span class=md-ellipsis> binary_t </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/bjdata_version_t/ class=md-nav__link> <span class=md-ellipsis> bjdata_version_t </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/boolean_t/ class=md-nav__link> <span class=md-ellipsis> boolean_t </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/cbegin/ class=md-nav__link> <span class=md-ellipsis> cbegin </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/cbor_tag_handler_t/ class=md-nav__link> <span class=md-ellipsis> cbor_tag_handler_t </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/cend/ class=md-nav__link> <span class=md-ellipsis> cend </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/clear/ class=md-nav__link> <span class=md-ellipsis> clear </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/contains/ class=md-nav__link> <span class=md-ellipsis> contains </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/count/ class=md-nav__link> <span class=md-ellipsis> count </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/crbegin/ class=md-nav__link> <span class=md-ellipsis> crbegin </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/crend/ class=md-nav__link> <span class=md-ellipsis> crend </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/default_object_comparator_t/ class=md-nav__link> <span class=md-ellipsis> default_object_comparator_t </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/diff/ class=md-nav__link> <span class=md-ellipsis> diff </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/dump/ class=md-nav__link> <span class=md-ellipsis> dump </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/emplace/ class=md-nav__link> <span class=md-ellipsis> emplace </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/emplace_back/ class=md-nav__link> <span class=md-ellipsis> emplace_back </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/empty/ class=md-nav__link> <span class=md-ellipsis> empty </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/end/ class=md-nav__link> <span class=md-ellipsis> end </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/end_pos/ class=md-nav__link> <span class=md-ellipsis> end_pos </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/erase/ class=md-nav__link> <span class=md-ellipsis> erase </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/error_handler_t/ class=md-nav__link> <span class=md-ellipsis> error_handler_t </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/exception/ class=md-nav__link> <span class=md-ellipsis> exception </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/find/ class=md-nav__link> <span class=md-ellipsis> find </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/flatten/ class=md-nav__link> <span class=md-ellipsis> flatten </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/format_as/ class=md-nav__link> <span class=md-ellipsis> format_as </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/from_bjdata/ class=md-nav__link> <span class=md-ellipsis> from_bjdata </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/from_bon8/ class=md-nav__link> <span class=md-ellipsis> from_bon8 </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/from_bson/ class=md-nav__link> <span class=md-ellipsis> from_bson </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/from_cbor/ class=md-nav__link> <span class=md-ellipsis> from_cbor </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/from_msgpack/ class=md-nav__link> <span class=md-ellipsis> from_msgpack </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/from_ubjson/ class=md-nav__link> <span class=md-ellipsis> from_ubjson </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/front/ class=md-nav__link> <span class=md-ellipsis> front </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/get/ class=md-nav__link> <span class=md-ellipsis> get </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/get_allocator/ class=md-nav__link> <span class=md-ellipsis> get_allocator </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/get_binary/ class=md-nav__link> <span class=md-ellipsis> get_binary </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/get_ptr/ class=md-nav__link> <span class=md-ellipsis> get_ptr </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/get_ref/ class=md-nav__link> <span class=md-ellipsis> get_ref </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/get_to/ class=md-nav__link> <span class=md-ellipsis> get_to </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/std_formatter/ class=md-nav__link> <span class=md-ellipsis> std::formatter&lt;basic_json&gt; </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/std_hash/ class=md-nav__link> <span class=md-ellipsis> std::hash&lt;basic_json&gt; </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/input_format_t/ class=md-nav__link> <span class=md-ellipsis> input_format_t </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/insert/ class=md-nav__link> <span class=md-ellipsis> insert </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/invalid_iterator/ class=md-nav__link> <span class=md-ellipsis> invalid_iterator </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/is_array/ class=md-nav__link> <span class=md-ellipsis> is_array </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/is_binary/ class=md-nav__link> <span class=md-ellipsis> is_binary </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/is_boolean/ class=md-nav__link> <span class=md-ellipsis> is_boolean </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/is_discarded/ class=md-nav__link> <span class=md-ellipsis> is_discarded </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/is_null/ class=md-nav__link> <span class=md-ellipsis> is_null </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/is_number/ class=md-nav__link> <span class=md-ellipsis> is_number </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/is_number_float/ class=md-nav__link> <span class=md-ellipsis> is_number_float </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/is_number_integer/ class=md-nav__link> <span class=md-ellipsis> is_number_integer </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/is_number_unsigned/ class=md-nav__link> <span class=md-ellipsis> is_number_unsigned </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/is_object/ class=md-nav__link> <span class=md-ellipsis> is_object </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/is_primitive/ class=md-nav__link> <span class=md-ellipsis> is_primitive </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/is_string/ class=md-nav__link> <span class=md-ellipsis> is_string </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/is_structured/ class=md-nav__link> <span class=md-ellipsis> is_structured </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/items/ class=md-nav__link> <span class=md-ellipsis> items </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/json_base_class_t/ class=md-nav__link> <span class=md-ellipsis> json_base_class_t </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/json_serializer/ class=md-nav__link> <span class=md-ellipsis> json_serializer </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/max_size/ class=md-nav__link> <span class=md-ellipsis> max_size </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/meta/ class=md-nav__link> <span class=md-ellipsis> meta </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/merge_diff/ class=md-nav__link> <span class=md-ellipsis> merge_diff </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/merge_patch/ class=md-nav__link> <span class=md-ellipsis> merge_patch </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/number_float_t/ class=md-nav__link> <span class=md-ellipsis> number_float_t </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/number_integer_t/ class=md-nav__link> <span class=md-ellipsis> number_integer_t </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/number_unsigned_t/ class=md-nav__link> <span class=md-ellipsis> number_unsigned_t </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/object/ class=md-nav__link> <span class=md-ellipsis> object </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/object_comparator_t/ class=md-nav__link> <span class=md-ellipsis> object_comparator_t </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/object_t/ class=md-nav__link> <span class=md-ellipsis> object_t </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/operator_ValueType/ class=md-nav__link> <span class=md-ellipsis> operator ValueType </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/operator_value_t/ class=md-nav__link> <span class=md-ellipsis> operator value_t </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/operator%5B%5D/ class=md-nav__link> <span class=md-ellipsis> operator[] </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/operator%3D/ class=md-nav__link> <span class=md-ellipsis> operator= </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/operator%2B%3D/ class=md-nav__link> <span class=md-ellipsis> operator+= </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/operator_eq/ class=md-nav__link> <span class=md-ellipsis> operator== </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/operator_ne/ class=md-nav__link> <span class=md-ellipsis> operator!= </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/operator_lt/ class=md-nav__link> <span class=md-ellipsis> operator< </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/operator_gt/ class=md-nav__link> <span class=md-ellipsis> operator> </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/operator_le/ class=md-nav__link> <span class=md-ellipsis> operator<= </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/operator_ge/ class=md-nav__link> <span class=md-ellipsis> operator>= </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/operator_spaceship/ class=md-nav__link> <span class=md-ellipsis> operator<=> </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/out_of_range/ class=md-nav__link> <span class=md-ellipsis> out_of_range </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/other_error/ class=md-nav__link> <span class=md-ellipsis> other_error </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/parse/ class=md-nav__link> <span class=md-ellipsis> parse </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/parse_error/ class=md-nav__link> <span class=md-ellipsis> parse_error </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/parse_event_t/ class=md-nav__link> <span class=md-ellipsis> parse_event_t </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/parser_callback_t/ class=md-nav__link> <span class=md-ellipsis> parser_callback_t </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/patch/ class=md-nav__link> <span class=md-ellipsis> patch </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/patch_inplace/ class=md-nav__link> <span class=md-ellipsis> patch_inplace </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/push_back/ class=md-nav__link> <span class=md-ellipsis> push_back </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/rbegin/ class=md-nav__link> <span class=md-ellipsis> rbegin </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/rend/ class=md-nav__link> <span class=md-ellipsis> rend </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/sax_parse/ class=md-nav__link> <span class=md-ellipsis> sax_parse </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/size/ class=md-nav__link> <span class=md-ellipsis> size </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/start_pos/ class=md-nav__link> <span class=md-ellipsis> start_pos </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/string_t/ class=md-nav__link> <span class=md-ellipsis> string_t </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/swap/ class=md-nav__link> <span class=md-ellipsis> swap </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/std_swap/ class=md-nav__link> <span class=md-ellipsis> std::swap&lt;basic_json&gt; </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/to_bjdata/ class=md-nav__link> <span class=md-ellipsis> to_bjdata </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/to_bon8/ class=md-nav__link> <span class=md-ellipsis> to_bon8 </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/to_bson/ class=md-nav__link> <span class=md-ellipsis> to_bson </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/to_cbor/ class=md-nav__link> <span class=md-ellipsis> to_cbor </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/to_msgpack/ class=md-nav__link> <span class=md-ellipsis> to_msgpack </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/to_string/ class=md-nav__link> <span class=md-ellipsis> to_string </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/to_ubjson/ class=md-nav__link> <span class=md-ellipsis> to_ubjson </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/type/ class=md-nav__link> <span class=md-ellipsis> type </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/type_error/ class=md-nav__link> <span class=md-ellipsis> type_error </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/type_name/ class=md-nav__link> <span class=md-ellipsis> type_name </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/unflatten/ class=md-nav__link> <span class=md-ellipsis> unflatten </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/update/ class=md-nav__link> <span class=md-ellipsis> update </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/value/ class=md-nav__link> <span class=md-ellipsis> value </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/value_t/ class=md-nav__link> <span class=md-ellipsis> value_t </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json/with_t/ class=md-nav__link> <span class=md-ellipsis> with_t </span> </a> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type=checkbox id=__nav_4_2> <div class="md-nav__link md-nav__container"> <a href=../../api/basic_json_document/ class="md-nav__link "> <span class=md-ellipsis> basic_json_document </span> </a> <label class="md-nav__link " for=__nav_4_2 id=__nav_4_2_label tabindex=0> <span class="md-nav__icon md-icon"></span> </label> </div> <nav class=md-nav data-md-level=2 aria-labelledby=__nav_4_2_label aria-expanded=false> <label class=md-nav__title for=__nav_4_2> <span class="md-nav__icon md-icon"></span> basic_json_document </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../api/basic_json_document/basic_json_document/ class=md-nav__link> <span class=md-ellipsis> (Constructor) </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_document/accept/ class=md-nav__link> <span class=md-ellipsis> accept </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_document/erase/ class=md-nav__link> <span class=md-ellipsis> erase </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_document/insert/ class=md-nav__link> <span class=md-ellipsis> insert </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_document/is_discarded/ class=md-nav__link> <span class=md-ellipsis> is_discarded </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_document/load/ class=md-nav__link> <span class=md-ellipsis> load </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_document/memory_usage/ class=md-nav__link> <span class=md-ellipsis> memory_usage </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_document/node_count/ class=md-nav__link> <span class=md-ellipsis> node_count </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_document/owns_source/ class=md-nav__link> <span class=md-ellipsis> owns_source </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_document/parse/ class=md-nav__link> <span class=md-ellipsis> parse </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_document/parse_copy/ class=md-nav__link> <span class=md-ellipsis> parse_copy </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_document/push_back/ class=md-nav__link> <span class=md-ellipsis> push_back </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_document/read/ class=md-nav__link> <span class=md-ellipsis> read </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_document/root/ class=md-nav__link> <span class=md-ellipsis> root </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_document/save/ class=md-nav__link> <span class=md-ellipsis> save </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_document/set/ class=md-nav__link> <span class=md-ellipsis> set </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_document/shrink_to_fit/ class=md-nav__link> <span class=md-ellipsis> shrink_to_fit </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_document/source/ class=md-nav__link> <span class=md-ellipsis> source </span> </a> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type=checkbox id=__nav_4_3> <div class="md-nav__link md-nav__container"> <a href=../../api/basic_json_view/ class="md-nav__link "> <span class=md-ellipsis> basic_json_view </span> </a> <label class="md-nav__link " for=__nav_4_3 id=__nav_4_3_label tabindex=0> <span class="md-nav__icon md-icon"></span> </label> </div> <nav class=md-nav data-md-level=2 aria-labelledby=__nav_4_3_label aria-expanded=false> <label class=md-nav__title for=__nav_4_3> <span class="md-nav__icon md-icon"></span> basic_json_view </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../api/basic_json_view/basic_json_view/ class=md-nav__link> <span class=md-ellipsis> (Constructor) </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/at/ class=md-nav__link> <span class=md-ellipsis> at </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/back/ class=md-nav__link> <span class=md-ellipsis> back </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/begin/ class=md-nav__link> <span class=md-ellipsis> begin </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/cbegin/ class=md-nav__link> <span class=md-ellipsis> cbegin </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/cend/ class=md-nav__link> <span class=md-ellipsis> cend </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/contains/ class=md-nav__link> <span class=md-ellipsis> contains </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/count/ class=md-nav__link> <span class=md-ellipsis> count </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/dump/ class=md-nav__link> <span class=md-ellipsis> dump </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/empty/ class=md-nav__link> <span class=md-ellipsis> empty </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/end/ class=md-nav__link> <span class=md-ellipsis> end </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/find/ class=md-nav__link> <span class=md-ellipsis> find </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/front/ class=md-nav__link> <span class=md-ellipsis> front </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/get/ class=md-nav__link> <span class=md-ellipsis> get </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/get_string/ class=md-nav__link> <span class=md-ellipsis> get_string </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/get_to/ class=md-nav__link> <span class=md-ellipsis> get_to </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/is_array/ class=md-nav__link> <span class=md-ellipsis> is_array </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/is_binary/ class=md-nav__link> <span class=md-ellipsis> is_binary </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/is_boolean/ class=md-nav__link> <span class=md-ellipsis> is_boolean </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/is_discarded/ class=md-nav__link> <span class=md-ellipsis> is_discarded </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/is_null/ class=md-nav__link> <span class=md-ellipsis> is_null </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/is_number/ class=md-nav__link> <span class=md-ellipsis> is_number </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/is_number_float/ class=md-nav__link> <span class=md-ellipsis> is_number_float </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/is_number_integer/ class=md-nav__link> <span class=md-ellipsis> is_number_integer </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/is_number_unsigned/ class=md-nav__link> <span class=md-ellipsis> is_number_unsigned </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/is_object/ class=md-nav__link> <span class=md-ellipsis> is_object </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/is_primitive/ class=md-nav__link> <span class=md-ellipsis> is_primitive </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/is_string/ class=md-nav__link> <span class=md-ellipsis> is_string </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/is_structured/ class=md-nav__link> <span class=md-ellipsis> is_structured </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/items/ class=md-nav__link> <span class=md-ellipsis> items </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/materialize/ class=md-nav__link> <span class=md-ellipsis> materialize </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/number_format/ class=md-nav__link> <span class=md-ellipsis> number_format </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/number_token/ class=md-nav__link> <span class=md-ellipsis> number_token </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/operator_ltlt/ class=md-nav__link> <span class=md-ellipsis> operator<< </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/operator%5B%5D/ class=md-nav__link> <span class=md-ellipsis> operator[] </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/operator_eq/ class=md-nav__link> <span class=md-ellipsis> operator== </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/operator_ne/ class=md-nav__link> <span class=md-ellipsis> operator!= </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/size/ class=md-nav__link> <span class=md-ellipsis> size </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/source_offset/ class=md-nav__link> <span class=md-ellipsis> source_offset </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/type/ class=md-nav__link> <span class=md-ellipsis> type </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/type_name/ class=md-nav__link> <span class=md-ellipsis> type_name </span> </a> </li> <li class=md-nav__item> <a href=../../api/basic_json_view/value/ class=md-nav__link> <span class=md-ellipsis> value </span> </a> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type=checkbox id=__nav_4_4> <div class="md-nav__link md-nav__container"> <a href=../../api/byte_container_with_subtype/ class="md-nav__link "> <span class=md-ellipsis> byte_container_with_subtype </span> </a> <label class="md-nav__link " for=__nav_4_4 id=__nav_4_4_label tabindex=0> <span class="md-nav__icon md-icon"></span> </label> </div> <nav class=md-nav data-md-level=2 aria-labelledby=__nav_4_4_label aria-expanded=false> <label class=md-nav__title for=__nav_4_4> <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> <span class=md-ellipsis> (constructor) </span> </a> </li> <li class=md-nav__item> <a href=../../api/byte_container_with_subtype/clear_subtype/ class=md-nav__link> <span class=md-ellipsis> clear_subtype </span> </a> </li> <li class=md-nav__item> <a href=../../api/byte_container_with_subtype/has_subtype/ class=md-nav__link> <span class=md-ellipsis> has_subtype </span> </a> </li> <li class=md-nav__item> <a href=../../api/byte_container_with_subtype/operator_eq/ class=md-nav__link> <span class=md-ellipsis> operator== </span> </a> </li> <li class=md-nav__item> <a href=../../api/byte_container_with_subtype/operator_ne/ class=md-nav__link> <span class=md-ellipsis> operator!= </span> </a> </li> <li class=md-nav__item> <a href=../../api/byte_container_with_subtype/set_subtype/ class=md-nav__link> <span class=md-ellipsis> set_subtype </span> </a> </li> <li class=md-nav__item> <a href=../../api/byte_container_with_subtype/subtype/ class=md-nav__link> <span class=md-ellipsis> subtype </span> </a> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type=checkbox id=__nav_4_5> <div class="md-nav__link md-nav__container"> <a href=../../api/adl_serializer/ class="md-nav__link "> <span class=md-ellipsis> adl_serializer </span> </a> <label class="md-nav__link " for=__nav_4_5 id=__nav_4_5_label tabindex=0> <span class="md-nav__icon md-icon"></span> </label> </div> <nav class=md-nav data-md-level=2 aria-labelledby=__nav_4_5_label aria-expanded=false> <label class=md-nav__title for=__nav_4_5> <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> <span class=md-ellipsis> from_json </span> </a> </li> <li class=md-nav__item> <a href=../../api/adl_serializer/to_json/ class=md-nav__link> <span class=md-ellipsis> to_json </span> </a> </li> </ul> </nav> </li> <li class=md-nav__item> <a href=../../api/is_json_view/ class=md-nav__link> <span class=md-ellipsis> is_json_view </span> </a> </li> <li class=md-nav__item> <a href=../../api/json/ class=md-nav__link> <span class=md-ellipsis> json </span> </a> </li> <li class=md-nav__item> <a href=../../api/json_document/ class=md-nav__link> <span class=md-ellipsis> json_document </span> </a> </li> <li class=md-nav__item> <a href=../../api/json_editable_document/ class=md-nav__link> <span class=md-ellipsis> json_editable_document </span> </a> </li> <li class=md-nav__item> <a href=../../api/json_editable_view/ class=md-nav__link> <span class=md-ellipsis> json_editable_view </span> </a> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type=checkbox id=__nav_4_11> <div class="md-nav__link md-nav__container"> <a href=../../api/json_pointer/ class="md-nav__link "> <span class=md-ellipsis> json_pointer </span> </a> <label class="md-nav__link " for=__nav_4_11 id=__nav_4_11_label tabindex=0> <span class="md-nav__icon md-icon"></span> </label> </div> <nav class=md-nav data-md-level=2 aria-labelledby=__nav_4_11_label aria-expanded=false> <label class=md-nav__title for=__nav_4_11> <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> <span class=md-ellipsis> (Constructor) </span> </a> </li> <li class=md-nav__item> <a href=../../api/json_pointer/back/ class=md-nav__link> <span class=md-ellipsis> back </span> </a> </li> <li class=md-nav__item> <a href=../../api/json_pointer/empty/ class=md-nav__link> <span class=md-ellipsis> empty </span> </a> </li> <li class=md-nav__item> <a href=../../api/json_pointer/front/ class=md-nav__link> <span class=md-ellipsis> front </span> </a> </li> <li class=md-nav__item> <a href=../../api/json_pointer/operator_string_t/ class=md-nav__link> <span class=md-ellipsis> operator string_t </span> </a> </li> <li class=md-nav__item> <a href=../../api/json_pointer/operator_eq/ class=md-nav__link> <span class=md-ellipsis> operator== </span> </a> </li> <li class=md-nav__item> <a href=../../api/json_pointer/operator_ne/ class=md-nav__link> <span class=md-ellipsis> operator!= </span> </a> </li> <li class=md-nav__item> <a href=../../api/json_pointer/operator_spaceship/ class=md-nav__link> <span class=md-ellipsis> operator<=> </span> </a> </li> <li class=md-nav__item> <a href=../../api/json_pointer/operator_slash/ class=md-nav__link> <span class=md-ellipsis> operator/ </span> </a> </li> <li class=md-nav__item> <a href=../../api/json_pointer/operator_slasheq/ class=md-nav__link> <span class=md-ellipsis> operator/= </span> </a> </li> <li class=md-nav__item> <a href=../../api/json_pointer/parent_pointer/ class=md-nav__link> <span class=md-ellipsis> parent_pointer </span> </a> </li> <li class=md-nav__item> <a href=../../api/json_pointer/pop_back/ class=md-nav__link> <span class=md-ellipsis> pop_back </span> </a> </li> <li class=md-nav__item> <a href=../../api/json_pointer/pop_front/ class=md-nav__link> <span class=md-ellipsis> pop_front </span> </a> </li> <li class=md-nav__item> <a href=../../api/json_pointer/push_back/ class=md-nav__link> <span class=md-ellipsis> push_back </span> </a> </li> <li class=md-nav__item> <a href=../../api/json_pointer/push_front/ class=md-nav__link> <span class=md-ellipsis> push_front </span> </a> </li> <li class=md-nav__item> <a href=../../api/json_pointer/string_t/ class=md-nav__link> <span class=md-ellipsis> string_t </span> </a> </li> <li class=md-nav__item> <a href=../../api/json_pointer/to_string/ class=md-nav__link> <span class=md-ellipsis> to_string </span> </a> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type=checkbox id=__nav_4_12> <div class="md-nav__link md-nav__container"> <a href=../../api/json_sax/ class="md-nav__link "> <span class=md-ellipsis> json_sax </span> </a> <label class="md-nav__link " for=__nav_4_12 id=__nav_4_12_label tabindex=0> <span class="md-nav__icon md-icon"></span> </label> </div> <nav class=md-nav data-md-level=2 aria-labelledby=__nav_4_12_label aria-expanded=false> <label class=md-nav__title for=__nav_4_12> <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> <span class=md-ellipsis> binary </span> </a> </li> <li class=md-nav__item> <a href=../../api/json_sax/boolean/ class=md-nav__link> <span class=md-ellipsis> boolean </span> </a> </li> <li class=md-nav__item> <a href=../../api/json_sax/end_array/ class=md-nav__link> <span class=md-ellipsis> end_array </span> </a> </li> <li class=md-nav__item> <a href=../../api/json_sax/end_object/ class=md-nav__link> <span class=md-ellipsis> end_object </span> </a> </li> <li class=md-nav__item> <a href=../../api/json_sax/key/ class=md-nav__link> <span class=md-ellipsis> key </span> </a> </li> <li class=md-nav__item> <a href=../../api/json_sax/null/ class=md-nav__link> <span class=md-ellipsis> null </span> </a> </li> <li class=md-nav__item> <a href=../../api/json_sax/number_float/ class=md-nav__link> <span class=md-ellipsis> number_float </span> </a> </li> <li class=md-nav__item> <a href=../../api/json_sax/number_integer/ class=md-nav__link> <span class=md-ellipsis> number_integer </span> </a> </li> <li class=md-nav__item> <a href=../../api/json_sax/number_unsigned/ class=md-nav__link> <span class=md-ellipsis> number_unsigned </span> </a> </li> <li class=md-nav__item> <a href=../../api/json_sax/parse_error/ class=md-nav__link> <span class=md-ellipsis> parse_error </span> </a> </li> <li class=md-nav__item> <a href=../../api/json_sax/start_array/ class=md-nav__link> <span class=md-ellipsis> start_array </span> </a> </li> <li class=md-nav__item> <a href=../../api/json_sax/start_object/ class=md-nav__link> <span class=md-ellipsis> start_object </span> </a> </li> <li class=md-nav__item> <a href=../../api/json_sax/string/ class=md-nav__link> <span class=md-ellipsis> string </span> </a> </li> </ul> </nav> </li> <li class=md-nav__item> <a href=../../api/json_view/ class=md-nav__link> <span class=md-ellipsis> json_view </span> </a> </li> <li class=md-nav__item> <a href=../../api/operator_ltlt/ class=md-nav__link> <span class=md-ellipsis> operator<<(basic_json), operator<<(json_pointer) </span> </a> </li> <li class=md-nav__item> <a href=../../api/operator_gtgt/ class=md-nav__link> <span class=md-ellipsis> operator>>(basic_json) </span> </a> </li> <li class=md-nav__item> <a href=../../api/operator_literal_json/ class=md-nav__link> <span class=md-ellipsis> operator""_json </span> </a> </li> <li class=md-nav__item> <a href=../../api/operator_literal_json_pointer/ class=md-nav__link> <span class=md-ellipsis> operator""_json_pointer </span> </a> </li> <li class=md-nav__item> <a href=../../api/ordered_json/ class=md-nav__link> <span class=md-ellipsis> ordered_json </span> </a> </li> <li class=md-nav__item> <a href=../../api/ordered_json_document/ class=md-nav__link> <span class=md-ellipsis> ordered_json_document </span> </a> </li> <li class=md-nav__item> <a href=../../api/ordered_json_editable_document/ class=md-nav__link> <span class=md-ellipsis> ordered_json_editable_document </span> </a> </li> <li class=md-nav__item> <a href=../../api/ordered_json_editable_view/ class=md-nav__link> <span class=md-ellipsis> ordered_json_editable_view </span> </a> </li> <li class=md-nav__item> <a href=../../api/ordered_json_view/ class=md-nav__link> <span class=md-ellipsis> ordered_json_view </span> </a> </li> <li class=md-nav__item> <a href=../../api/ordered_map/ class=md-nav__link> <span class=md-ellipsis> ordered_map </span> </a> </li> <li class=md-nav__item> <a href=../../api/view_mode/ class=md-nav__link> <span class=md-ellipsis> view_mode </span> </a> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type=checkbox id=__nav_4_25> <div class="md-nav__link md-nav__container"> <a href=../../api/macros/ class="md-nav__link "> <span class=md-ellipsis> macros </span> </a> <label class="md-nav__link " for=__nav_4_25 id=__nav_4_25_label tabindex=0> <span class="md-nav__icon md-icon"></span> </label> </div> <nav class=md-nav data-md-level=2 aria-labelledby=__nav_4_25_label aria-expanded=false> <label class=md-nav__title for=__nav_4_25> <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> <span class=md-ellipsis> JSON_ASSERT </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_brace_init_copy_semantics/ class=md-nav__link> <span class=md-ellipsis> JSON_BRACE_INIT_COPY_SEMANTICS </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_throw_user/ class=md-nav__link> <span class=md-ellipsis> JSON_CATCH_USER, JSON_THROW_USER, JSON_TRY_USER </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_diagnostics/ class=md-nav__link> <span class=md-ellipsis> JSON_DIAGNOSTICS </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_delete_deprecated_functions/ class=md-nav__link> <span class=md-ellipsis> JSON_DELETE_DEPRECATED_FUNCTIONS </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_diagnostic_positions/ class=md-nav__link> <span class=md-ellipsis> JSON_DIAGNOSTIC_POSITIONS </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_disable_enum_serialization/ class=md-nav__link> <span class=md-ellipsis> JSON_DISABLE_ENUM_SERIALIZATION </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_disable_stream_bulk_scan/ class=md-nav__link> <span class=md-ellipsis> JSON_DISABLE_STREAM_BULK_SCAN </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_disable_tuple_reference_conversion/ class=md-nav__link> <span class=md-ellipsis> JSON_DISABLE_TUPLE_REFERENCE_CONVERSION </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_disable_unlocked_file_io/ class=md-nav__link> <span class=md-ellipsis> JSON_DISABLE_UNLOCKED_FILE_IO </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_has_cpp_11/ class=md-nav__link> <span class=md-ellipsis> JSON_HAS_CPP_11, JSON_HAS_CPP_14, JSON_HAS_CPP_17, JSON_HAS_CPP_20, JSON_HAS_CPP_23, JSON_HAS_CPP_26 </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_has_filesystem/ class=md-nav__link> <span class=md-ellipsis> JSON_HAS_EXPERIMENTAL_FILESYSTEM, JSON_HAS_FILESYSTEM </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_has_range_view_conversion/ class=md-nav__link> <span class=md-ellipsis> JSON_HAS_RANGE_VIEW_CONVERSION </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_has_ranges/ class=md-nav__link> <span class=md-ellipsis> JSON_HAS_RANGES </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_has_static_rtti/ class=md-nav__link> <span class=md-ellipsis> JSON_HAS_STATIC_RTTI </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_has_std_format/ class=md-nav__link> <span class=md-ellipsis> JSON_HAS_STD_FORMAT </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_has_three_way_comparison/ class=md-nav__link> <span class=md-ellipsis> JSON_HAS_THREE_WAY_COMPARISON </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_no_automatic_udls/ class=md-nav__link> <span class=md-ellipsis> JSON_NO_AUTOMATIC_UDLS </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_noexception/ class=md-nav__link> <span class=md-ellipsis> JSON_NOEXCEPTION </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_no_io/ class=md-nav__link> <span class=md-ellipsis> JSON_NO_IO </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_no_simd/ class=md-nav__link> <span class=md-ellipsis> JSON_NO_SIMD </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_no_thread_local/ class=md-nav__link> <span class=md-ellipsis> JSON_NO_THREAD_LOCAL </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_precise_stream_position/ class=md-nav__link> <span class=md-ellipsis> JSON_PRECISE_STREAM_POSITION </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_skip_library_version_check/ class=md-nav__link> <span class=md-ellipsis> JSON_SKIP_LIBRARY_VERSION_CHECK </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_skip_unsupported_compiler_check/ class=md-nav__link> <span class=md-ellipsis> JSON_SKIP_UNSUPPORTED_COMPILER_CHECK </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_strict_binary_utf8/ class=md-nav__link> <span class=md-ellipsis> JSON_STRICT_BINARY_UTF8 </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_strict_nul_handling/ class=md-nav__link> <span class=md-ellipsis> JSON_STRICT_NUL_HANDLING </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_use_global_udls/ class=md-nav__link> <span class=md-ellipsis> JSON_USE_GLOBAL_UDLS </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_use_implicit_conversions/ class=md-nav__link> <span class=md-ellipsis> JSON_USE_IMPLICIT_CONVERSIONS </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_use_legacy_discarded_value_comparison/ class=md-nav__link> <span class=md-ellipsis> JSON_USE_LEGACY_DISCARDED_VALUE_COMPARISON </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_use_objects_for_enum_keyed_maps/ class=md-nav__link> <span class=md-ellipsis> JSON_USE_OBJECTS_FOR_ENUM_KEYED_MAPS </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/json_use_simdutf/ class=md-nav__link> <span class=md-ellipsis> JSON_USE_SIMDUTF </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/nlohmann_define_derived_type/ class=md-nav__link> <span class=md-ellipsis> NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE, NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE_WITH_DEFAULT, NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE_ONLY_SERIALIZE, NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE, NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE_WITH_DEFAULT, NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE_ONLY_SERIALIZE </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/nlohmann_define_type_intrusive/ class=md-nav__link> <span class=md-ellipsis> NLOHMANN_DEFINE_TYPE_INTRUSIVE, NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_DEFAULT, NLOHMANN_DEFINE_TYPE_INTRUSIVE_ONLY_SERIALIZE </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/nlohmann_define_type_non_intrusive/ class=md-nav__link> <span class=md-ellipsis> NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE, NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_WITH_DEFAULT, NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_ONLY_SERIALIZE </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/nlohmann_define_type_with_names/ class=md-nav__link> <span class=md-ellipsis> NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_NAMES, NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_DEFAULT_WITH_NAMES, NLOHMANN_DEFINE_TYPE_INTRUSIVE_ONLY_SERIALIZE_WITH_NAMES, NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_WITH_NAMES, NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_WITH_DEFAULT_WITH_NAMES, NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_ONLY_SERIALIZE_WITH_NAMES, NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE_WITH_NAMES, NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE_WITH_DEFAULT_WITH_NAMES, NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE_ONLY_SERIALIZE_WITH_NAMES, NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE_WITH_NAMES, NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE_WITH_DEFAULT_WITH_NAMES, NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE_ONLY_SERIALIZE_WITH_NAMES </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/nlohmann_json_namespace/ class=md-nav__link> <span class=md-ellipsis> NLOHMANN_JSON_NAMESPACE </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/nlohmann_json_namespace_begin/ class=md-nav__link> <span class=md-ellipsis> NLOHMANN_JSON_NAMESPACE_BEGIN, NLOHMANN_JSON_NAMESPACE_END </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/nlohmann_json_namespace_no_version/ class=md-nav__link> <span class=md-ellipsis> NLOHMANN_JSON_NAMESPACE_NO_VERSION </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/nlohmann_json_serialize_enum/ class=md-nav__link> <span class=md-ellipsis> NLOHMANN_JSON_SERIALIZE_ENUM </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/nlohmann_json_serialize_enum_strict/ class=md-nav__link> <span class=md-ellipsis> NLOHMANN_JSON_SERIALIZE_ENUM_STRICT </span> </a> </li> <li class=md-nav__item> <a href=../../api/macros/nlohmann_json_version_major/ class=md-nav__link> <span class=md-ellipsis> NLOHMANN_JSON_VERSION_MAJOR, NLOHMANN_JSON_VERSION_MINOR, NLOHMANN_JSON_VERSION_PATCH </span> </a> </li> </ul> </nav> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--active md-nav__item--section md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type=checkbox id=__nav_5 checked> <div class="md-nav__link md-nav__container"> <a href=../ class="md-nav__link "> <span class=md-ellipsis> Community </span> </a> <label class="md-nav__link " for=__nav_5 id=__nav_5_label tabindex> <span class="md-nav__icon md-icon"></span> </label> </div> <nav class=md-nav data-md-level=1 aria-labelledby=__nav_5_label aria-expanded=true> <label class=md-nav__title for=__nav_5> <span class="md-nav__icon md-icon"></span> Community </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../ecosystem/ class=md-nav__link> <span class=md-ellipsis> Ecosystem </span> </a> </li> <li class=md-nav__item> <a href=../code_of_conduct/ class=md-nav__link> <span class=md-ellipsis> Code of Conduct </span> </a> </li> <li class=md-nav__item> <a href=../contribution_guidelines/ class=md-nav__link> <span class=md-ellipsis> Contribution Guidelines </span> </a> </li> <li class=md-nav__item> <a href=../quality_assurance/ class=md-nav__link> <span class=md-ellipsis> Quality assurance </span> </a> </li> <li class=md-nav__item> <a href=../governance/ class=md-nav__link> <span class=md-ellipsis> Governance </span> </a> </li> <li class="md-nav__item md-nav__item--active"> <input class="md-nav__toggle md-toggle" type=checkbox id=__toc> <label class="md-nav__link md-nav__link--active" for=__toc> <span class=md-ellipsis> Roadmap </span> <span class="md-nav__icon md-icon"></span> </label> <a href=./ class="md-nav__link md-nav__link--active"> <span class=md-ellipsis> Roadmap </span> </a> <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=#what-the-project-will-do class=md-nav__link> <span class=md-ellipsis> What the project will do </span> </a> </li> <li class=md-nav__item> <a href=#what-the-project-will-not-do class=md-nav__link> <span class=md-ellipsis> What the project will not do </span> </a> </li> <li class=md-nav__item> <a href=#api-stability class=md-nav__link> <span class=md-ellipsis> API stability </span> </a> </li> <li class=md-nav__item> <a href=#version-40 class=md-nav__link> <span class=md-ellipsis> Version 4.0 </span> </a> <nav class=md-nav aria-label="Version 4.0"> <ul class=md-nav__list> <li class=md-nav__item> <a href=#trying-out-40-today class=md-nav__link> <span class=md-ellipsis> Trying out 4.0 today </span> </a> </li> <li class=md-nav__item> <a href=#removal-of-deprecated-functions class=md-nav__link> <span class=md-ellipsis> Removal of deprecated functions </span> </a> </li> </ul> </nav> </li> </ul> </nav> </li> <li class=md-nav__item> <a href=../security_policy/ class=md-nav__link> <span class=md-ellipsis> Security Policy </span> </a> </li> <li class=md-nav__item> <a href=../assurance_case/ class=md-nav__link> <span class=md-ellipsis> Assurance case </span> </a> </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=#what-the-project-will-do class=md-nav__link> <span class=md-ellipsis> What the project will do </span> </a> </li> <li class=md-nav__item> <a href=#what-the-project-will-not-do class=md-nav__link> <span class=md-ellipsis> What the project will not do </span> </a> </li> <li class=md-nav__item> <a href=#api-stability class=md-nav__link> <span class=md-ellipsis> API stability </span> </a> </li> <li class=md-nav__item> <a href=#version-40 class=md-nav__link> <span class=md-ellipsis> Version 4.0 </span> </a> <nav class=md-nav aria-label="Version 4.0"> <ul class=md-nav__list> <li class=md-nav__item> <a href=#trying-out-40-today class=md-nav__link> <span class=md-ellipsis> Trying out 4.0 today </span> </a> </li> <li class=md-nav__item> <a href=#removal-of-deprecated-functions class=md-nav__link> <span class=md-ellipsis> Removal of deprecated functions </span> </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/community/roadmap.md" title="Edit this page" class="md-content__button md-icon" rel="edit"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M10 20H6V4h7v5h5v3.1l2-2V8l-6-6H6c-1.1 0-2 .9-2 2v16c0 1.1.9 2 2 2h4zm10.2-7c.1 0 .3.1.4.2l1.3 1.3c.2.2.2.6 0 .8l-1 1-2.1-2.1 1-1c.1-.1.2-.2.4-.2m0 3.9L14.1 23H12v-2.1l6.1-6.1z"/></svg> </a> <a href="https://github.com/nlohmann/json/raw/develop/docs/mkdocs/docs/community/roadmap.md" title="View source of this page" class="md-content__button md-icon"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M17 18c.56 0 1 .44 1 1s-.44 1-1 1-1-.44-1-1 .44-1 1-1m0-3c-2.73 0-5.06 1.66-6 4 .94 2.34 3.27 4 6 4s5.06-1.66 6-4c-.94-2.34-3.27-4-6-4m0 6.5a2.5 2.5 0 0 1-2.5-2.5 2.5 2.5 0 0 1 2.5-2.5 2.5 2.5 0 0 1 2.5 2.5 2.5 2.5 0 0 1-2.5 2.5M9.27 20H6V4h7v5h5v4.07c.7.08 1.36.25 2 .49V8l-6-6H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h4.5a8.2 8.2 0 0 1-1.23-2"/></svg> </a> <h1 id=roadmap>Roadmap<a class=headerlink href=#roadmap title="Permanent link">&para;</a></h1> <p>This page describes what the project intends to do, and what it does not intend to do, over the next year. Concrete work items are tracked in the <a href="https://github.com/nlohmann/json/milestones">GitHub milestones</a> and the <a href="https://github.com/nlohmann/json/issues">issue tracker</a>.</p> <h2 id=what-the-project-will-do>What the project will do<a class=headerlink href=#what-the-project-will-do title="Permanent link">&para;</a></h2> <ul> <li><strong>Keep the C++11 baseline.</strong> The library will continue to compile with every <a href="https://github.com/nlohmann/json/blob/develop/README.md#supported-compilers">supported C++11 compiler</a>. Features of later standards are only used when they are guarded by the <code>JSON_HAS_CPP_*</code> macros.</li> <li><strong>Stay conformant to <abbr title="JavaScript Object Notation">JSON</abbr>.</strong> The parser and serializer follow <a href="https://datatracker.ietf.org/doc/html/rfc8259"><abbr title="Request for Comments">RFC</abbr> 8259</a>. Extensions such as <a href=../../features/comments/ >comments</a> or <a href=../../features/trailing_commas/ >trailing commas</a> remain opt-in.</li> <li><strong>Keep the 3.x public <abbr title="Application Programming Interface">API</abbr> stable.</strong> Releases follow <a href="https://semver.org">semantic versioning</a>. Changes that would break existing code are only added behind a feature macro, so users can opt in and test their code before a next major release, see <a href=#version-40>Version 4.0</a>.</li> <li><strong>Support a broad range of compilers and platforms.</strong> The <a href=../quality_assurance/ ><abbr title="Continuous Integration">CI</abbr></a> keeps testing old and new versions of <abbr title="GNU Compiler Collection">GCC</abbr>, Clang, <abbr title="Microsoft Visual C++">MSVC</abbr>, and other compilers on Linux, macOS, and Windows.</li> <li><strong>Keep the quality assurance up.</strong> Every change keeps the test coverage at 100%, passes the static and dynamic analysis, and is fuzz-tested by OSS-Fuzz, see <a href=../quality_assurance/ >Quality assurance</a>.</li> <li><strong>Harden the library against hostile input.</strong> Handling deeply nested values without exhausting the call stack is ongoing work.</li> <li><strong>Fix bugs and security issues</strong> reported through the issue tracker and the <a href=../security_policy/ >security policy</a>.</li> </ul> <h2 id=what-the-project-will-not-do>What the project will not do<a class=headerlink href=#what-the-project-will-not-do title="Permanent link">&para;</a></h2> <ul> <li><strong>Break the public <abbr title="Application Programming Interface">API</abbr> of version 3.x.</strong> See <a href=#api-stability><abbr title="Application Programming Interface">API</abbr> stability</a> for what this covers.</li> <li><strong>Require a newer C++ standard than C++11.</strong></li> <li><strong>Break <abbr title="JavaScript Object Notation">JSON</abbr> conformance</strong> or enable non-standard extensions by default.</li> <li><strong>Add dependencies</strong> or require a build step. The library remains header-only, and the single header <code>json.hpp</code> remains a complete distribution.</li> <li><strong>Trade simplicity for speed or memory efficiency.</strong> Performance improvements are welcome, but the library is not meant to compete with the fastest <abbr title="JavaScript Object Notation">JSON</abbr> libraries, see <a href=../../home/design_goals/ >Design goals</a>.</li> </ul> <h2 id=api-stability><abbr title="Application Programming Interface">API</abbr> stability<a class=headerlink href=#api-stability title="Permanent link">&para;</a></h2> <p>Releases follow <a href="https://semver.org">semantic versioning</a>: a minor or patch release of version 3.x does not break code that uses the public <abbr title="Application Programming Interface">API</abbr>, unless that code opts in to a change with a macro as described <a href=#version-40>below</a>. In particular, a 3.x release does not:</p> <ul> <li>make breaking changes to the signature of a function: the types or order of its existing parameters, its return type, its <code>noexcept</code> or <code>constexpr</code> specifier, or the const-ness of a member function. New parameters may be added if they have a default value;</li> <li>remove or rename a function or class, or change the template parameters of a public class template;</li> <li>change which exceptions a function throws, or the <a href=../../home/exceptions/ >exception ids</a>;</li> <li>change access specifiers, or change or remove existing default arguments. New default arguments may be added;</li> <li>change the <abbr title="JavaScript Object Notation">JSON</abbr> type that a valid input parses to, or the text that <code>dump()</code> produces for a valid value;</li> <li>accept input that was rejected before, or reject input that was accepted before;</li> <li>change the order in which the keys of an object are iterated. The default type sorts keys, and <a href=../../api/ordered_json/ ><code>ordered_json</code></a> keeps insertion order;</li> <li>change when iterators, pointers, or references are invalidated, or the state of a moved-from <code>basic_json</code>;</li> <li>add or remove implicit conversions from <code>basic_json</code>;</li> <li>change how <code>to_json</code> and <code>from_json</code> functions are found, or the behavior of <a href=../../api/adl_serializer/ ><code>adl_serializer</code></a>;</li> <li>add pure virtual functions to the <a href=../../api/json_sax/ ><code>json_sax</code></a> interface;</li> <li>remove, rename, renumber, or add enumerators of <code>value_t</code>;</li> <li>remove or rename a documented macro, CMake option, CMake target, or header, or change what a documented macro does.</li> </ul> <p>Exceptions to these rules, for instance when fixing a bug requires changing the exception a function throws, are documented in the <a href=../../home/releases/ >release notes</a>.</p> <p>The following are <strong>not</strong> part of the public <abbr title="Application Programming Interface">API</abbr> and may change in any release, including patch releases:</p> <ul> <li>The text of exception messages returned by <code>what()</code>. Use the <a href=../../home/exceptions/ >exception id</a> to tell errors apart.</li> <li>The <abbr title="Application Binary Interface">ABI</abbr>, including <code>sizeof(basic_json)</code> and the memory layout of its values. The <a href=../../features/namespace/ >versioned inline namespace</a> turns mixing versions into a link error.</li> <li>The hash values returned by <code>std::hash</code> for <code>basic_json</code>. Numbers that compare equal still hash equally.</li> <li>Everything in namespace <code>nlohmann::detail</code>, and macros and type traits that are not documented in the <a href=../../api/basic_json/ ><abbr title="Application Programming Interface">API</abbr> reference</a>.</li> </ul> <p>Breaking changes are only added behind a macro whose default keeps the 3.x behavior. See <a href=#version-40>Version 4.0</a> and the <a href=../../features/macros/ >macro overview</a>.</p> <h2 id=version-40>Version 4.0<a class=headerlink href=#version-40 title="Permanent link">&para;</a></h2> <p>There is no release date for version 4.0 yet. Proposals that need a major version, for instance stricter type conversions, are collected in issue <a href="https://github.com/nlohmann/json/issues/3453">#3453</a>.</p> <div class="admonition note"> <p class=admonition-title>Not final</p> <p>The plan for version 4.0 described below is not final and may still change: macros may be added to or removed from the list, and planned defaults may be revised. Any such change will be documented on this page.</p> </div> <h3 id=trying-out-40-today>Trying out 4.0 today<a class=headerlink href=#trying-out-40-today title="Permanent link">&para;</a></h3> <p>Version 4.0 will not be developed on a separate branch. Instead, every breaking change is first added to a 3.x release behind a macro whose default keeps the 3.x behavior. Version 4.0 then switches the defaults and removes the macros. Version 4.0 is therefore the sum of these macros: you can try it on the 3.x release train today by defining each macro to its 4.0 value and fixing what no longer compiles or behaves differently. Once your code works with all of them, it is ready for version 4.0.</p> <p>Each macro has a default value in 3.x and a different value in version 4.0. Define the macro to the 4.0 value to try it on the 3.x release train today; version 4.0 makes that value the default:</p> <div class=nj-fig-wrap> <p><svg class="nj-fig nj-fig--lanes" viewbox="0 0 880 504" role=img aria-labelledby=nj-int-lanes-title xmlns=http://www.w3.org/2000/svg> <title id=nj-int-lanes-title>Two lanes: the 3.x release train, whose minor and patch releases do not break code that uses the public A&#8203;PI, followed by version 4.0, which has no release date yet. Each breaking change is a macro that is available in 3.x today with its 3.x default and becomes the default in 4.0: JSON_USE_IMPLICIT_CONVERSIONS, added in 3.9.0, 3.x default 1, 4.0 value 0; JSON_USE_GLOBAL_UDLS, added in 3.11.0, 3.x default 1, 4.0 value 0; JSON_USE_LEGACY_DISCARDED_VALUE_COMPARISON, added in 3.11.0, 3.x default 0, 4.0 value 0, macro removed; JSON_BRACE_INIT_COPY_SEMANTICS, added in 3.13.0, 3.x default 0, 4.0 value 1; JSON_PRECISE_STREAM_POSITION, added in 3.13.0, 3.x default 0, 4.0 value 1; JSON_STRICT_NUL_HANDLING, added in 3.13.0, 3.x default 0, 4.0 value 1; JSON_STRICT_BINARY_UTF8, added in 3.13.0, 3.x default 0, 4.0 value 1; JSON_DISABLE_TUPLE_REFERENCE_CONVERSION, added in 3.13.0, 3.x default 0, 4.0 value 1; JSON_DELETE_DEPRECATED_FUNCTIONS, added in 3.13.0, 3.x default 0, 4.0 value 1, macro removed.</title> <defs><marker id=nj-int-arrow viewbox="0 0 10 10" refx=9 refy=5 markerwidth=7 markerheight=7 orient=auto><path class=fg-head d="M0 1 L10 5 L0 9 z"/></marker></defs> <rect class=nj-int-lane x=16 y=16 width=600 height=56 rx=10 /> <text class=nj-int-lanetext x=32 y=41>3.x release train</text> <text class=nj-int-mute x=32 y=60>available today</text> <line class=nj-int-axis x1=300 y1=30 x2=300 y2=44 /> <text class=nj-int-mute x=300 y=60 text-anchor=middle>3.9.0</text> <line class=nj-int-axis x1=445 y1=30 x2=445 y2=44 /> <text class=nj-int-mute x=445 y=60 text-anchor=middle>3.11.0</text> <line class=nj-int-axis x1=590 y1=30 x2=590 y2=44 /> <text class=nj-int-mute x=590 y=60 text-anchor=middle>3.13.0</text> <line class=fg-arrow x1=210 y1=37 x2=600 y2=37 /> <line x1=618 y1=44 x2=660 y2=44 marker-end=url(#nj-int-arrow) class="fg-arrow fg-arrow--dash"/> <rect x=664 y=16 width=200 height=56 rx=10 class="nj-int-lane nj-int-lane--future"/> <text class=nj-int-lanetext x=680 y=41>4.0</text> <text class=nj-int-mute x=680 y=60>no release date yet</text> <text class=nj-int-text x=16 y=98>A minor or patch release of 3.x does not break code that uses the public A&#8203;PI, unless that code opts in with a macro.</text> <text class=nj-int-text x=16 y=118>4.0 is not developed on a separate branch: it switches the defaults of these macros and removes the macros.</text> <text class=fg-h x=32 y=150>Macro</text> <text class=fg-h x=380 y=150>added</text> <text class=fg-h x=500 y=150 text-anchor=middle>3.x default</text> <text class=nj-int-mute x=632 y=150 text-anchor=middle>define to try today</text> <text class=fg-h x=764 y=150 text-anchor=middle>4.0 default</text> <rect class=nj-int-row x=16 y=170 width=848 height=30 rx=6 /> <text class=nj-int-macro x=32 y=189.5>JSON_USE_IMPLICIT_CONVERSIONS</text> <text class=nj-int-mute x=380 y=189.5>3.9.0</text> <rect class=nj-int-pill x=470 y=174 width=60 height=22 rx=11 /> <text class=nj-int-val x=500 y=189.5 text-anchor=middle>1</text> <line x1=544 y1=185 x2=724 y2=185 marker-end=url(#nj-int-arrow) class="fg-arrow fg-arrow--dash"/> <rect x=728 y=174 width=72 height=22 rx=11 class="nj-int-pill nj-int-pill--v4"/> <text class="nj-int-val nj-int-val--v4" x=764 y=189.5 text-anchor=middle>0</text> <rect class=nj-int-row x=16 y=204 width=848 height=30 rx=6 /> <text class=nj-int-macro x=32 y=223.5>JSON_USE_GLOBAL_UDLS</text> <text class=nj-int-mute x=380 y=223.5>3.11.0</text> <rect class=nj-int-pill x=470 y=208 width=60 height=22 rx=11 /> <text class=nj-int-val x=500 y=223.5 text-anchor=middle>1</text> <line x1=544 y1=219 x2=724 y2=219 marker-end=url(#nj-int-arrow) class="fg-arrow fg-arrow--dash"/> <rect x=728 y=208 width=72 height=22 rx=11 class="nj-int-pill nj-int-pill--v4"/> <text class="nj-int-val nj-int-val--v4" x=764 y=223.5 text-anchor=middle>0</text> <rect class=nj-int-row x=16 y=238 width=848 height=30 rx=6 /> <text class=nj-int-macro x=32 y=257.5>JSON_USE_LEGACY_DISCARDED_VALUE_COMPARISON</text> <text class=nj-int-mute x=380 y=257.5>3.11.0</text> <rect class=nj-int-pill x=470 y=242 width=60 height=22 rx=11 /> <text class=nj-int-val x=500 y=257.5 text-anchor=middle>0</text> <line x1=544 y1=253 x2=724 y2=253 marker-end=url(#nj-int-arrow) class="fg-arrow fg-arrow--dash"/> <rect x=728 y=242 width=72 height=22 rx=11 class="nj-int-pill nj-int-pill--v4"/> <text class="nj-int-val nj-int-val--v4" x=764 y=257.5 text-anchor=middle>removed</text> <rect class=nj-int-row x=16 y=272 width=848 height=30 rx=6 /> <text class=nj-int-macro x=32 y=291.5>JSON_BRACE_INIT_COPY_SEMANTICS</text> <text class=nj-int-mute x=380 y=291.5>3.13.0</text> <rect class=nj-int-pill x=470 y=276 width=60 height=22 rx=11 /> <text class=nj-int-val x=500 y=291.5 text-anchor=middle>0</text> <line x1=544 y1=287 x2=724 y2=287 marker-end=url(#nj-int-arrow) class="fg-arrow fg-arrow--dash"/> <rect x=728 y=276 width=72 height=22 rx=11 class="nj-int-pill nj-int-pill--v4"/> <text class="nj-int-val nj-int-val--v4" x=764 y=291.5 text-anchor=middle>1</text> <rect class=nj-int-row x=16 y=306 width=848 height=30 rx=6 /> <text class=nj-int-macro x=32 y=325.5>JSON_PRECISE_STREAM_POSITION</text> <text class=nj-int-mute x=380 y=325.5>3.13.0</text> <rect class=nj-int-pill x=470 y=310 width=60 height=22 rx=11 /> <text class=nj-int-val x=500 y=325.5 text-anchor=middle>0</text> <line x1=544 y1=321 x2=724 y2=321 marker-end=url(#nj-int-arrow) class="fg-arrow fg-arrow--dash"/> <rect x=728 y=310 width=72 height=22 rx=11 class="nj-int-pill nj-int-pill--v4"/> <text class="nj-int-val nj-int-val--v4" x=764 y=325.5 text-anchor=middle>1</text> <rect class=nj-int-row x=16 y=340 width=848 height=30 rx=6 /> <text class=nj-int-macro x=32 y=359.5>JSON_STRICT_NUL_HANDLING</text> <text class=nj-int-mute x=380 y=359.5>3.13.0</text> <rect class=nj-int-pill x=470 y=344 width=60 height=22 rx=11 /> <text class=nj-int-val x=500 y=359.5 text-anchor=middle>0</text> <line x1=544 y1=355 x2=724 y2=355 marker-end=url(#nj-int-arrow) class="fg-arrow fg-arrow--dash"/> <rect x=728 y=344 width=72 height=22 rx=11 class="nj-int-pill nj-int-pill--v4"/> <text class="nj-int-val nj-int-val--v4" x=764 y=359.5 text-anchor=middle>1</text> <rect class=nj-int-row x=16 y=374 width=848 height=30 rx=6 /> <text class=nj-int-macro x=32 y=393.5>JSON_STRICT_BINARY_UTF8</text> <text class=nj-int-mute x=380 y=393.5>3.13.0</text> <rect class=nj-int-pill x=470 y=378 width=60 height=22 rx=11 /> <text class=nj-int-val x=500 y=393.5 text-anchor=middle>0</text> <line x1=544 y1=389 x2=724 y2=389 marker-end=url(#nj-int-arrow) class="fg-arrow fg-arrow--dash"/> <rect x=728 y=378 width=72 height=22 rx=11 class="nj-int-pill nj-int-pill--v4"/> <text class="nj-int-val nj-int-val--v4" x=764 y=393.5 text-anchor=middle>1</text> <rect class=nj-int-row x=16 y=408 width=848 height=30 rx=6 /> <text class=nj-int-macro x=32 y=427.5>JSON_DISABLE_TUPLE_REFERENCE_CONVERSION</text> <text class=nj-int-mute x=380 y=427.5>3.13.0</text> <rect class=nj-int-pill x=470 y=412 width=60 height=22 rx=11 /> <text class=nj-int-val x=500 y=427.5 text-anchor=middle>0</text> <line x1=544 y1=423 x2=724 y2=423 marker-end=url(#nj-int-arrow) class="fg-arrow fg-arrow--dash"/> <rect x=728 y=412 width=72 height=22 rx=11 class="nj-int-pill nj-int-pill--v4"/> <text class="nj-int-val nj-int-val--v4" x=764 y=427.5 text-anchor=middle>1</text> <rect class=nj-int-row x=16 y=442 width=848 height=30 rx=6 /> <text class=nj-int-macro x=32 y=461.5>JSON_DELETE_DEPRECATED_FUNCTIONS</text> <text class=nj-int-mute x=380 y=461.5>3.13.0</text> <rect class=nj-int-pill x=470 y=446 width=60 height=22 rx=11 /> <text class=nj-int-val x=500 y=461.5 text-anchor=middle>0</text> <line x1=544 y1=457 x2=724 y2=457 marker-end=url(#nj-int-arrow) class="fg-arrow fg-arrow--dash"/> <rect x=728 y=446 width=72 height=22 rx=11 class="nj-int-pill nj-int-pill--v4"/> <text class="nj-int-val nj-int-val--v4" x=764 y=461.5 text-anchor=middle>removed</text> <text class=nj-int-mute x=16 y=496>Versions on the 3.x lane are the ones that added a macro, not to scale. &#8220;removed&#8221;: see the 4.0 behavior column of the table.</text> </svg></p> </div> <p class=nj-caption>Each row is one macro: the 3.x release that added it, its default in 3.x, and its value in version 4.0 (highlighted) or "removed". Versions on the 3.x lane are not to scale.</p> <p>The following macros guard changes that are planned to become the default in version 4.0:</p> <table> <thead> <tr> <th>Macro</th> <th>3.x default</th> <th>4.0 behavior</th> <th>CMake option</th> <th>Added</th> </tr> </thead> <tbody> <tr> <td><a href=../../api/macros/json_use_implicit_conversions/ ><code>JSON_USE_IMPLICIT_CONVERSIONS</code></a></td> <td><code>1</code></td> <td><code>0</code>: no implicit conversions from <code>basic_json</code> to other types; use <a href=../../api/basic_json/get/ ><code>get</code></a> instead</td> <td><a href=../../integration/cmake/#json_implicitconversions><code>JSON_ImplicitConversions</code></a></td> <td>3.9.0</td> </tr> <tr> <td><a href=../../api/macros/json_use_global_udls/ ><code>JSON_USE_GLOBAL_UDLS</code></a></td> <td><code>1</code></td> <td><code>0</code>: the string literals <code>_json</code> and <code>_json_pointer</code> are only available in namespace <code>nlohmann::literals</code></td> <td><a href=../../integration/cmake/#json_globaludls><code>JSON_GlobalUDLs</code></a></td> <td>3.11.0</td> </tr> <tr> <td><a href=../../api/macros/json_use_legacy_discarded_value_comparison/ ><code>JSON_USE_LEGACY_DISCARDED_VALUE_COMPARISON</code></a></td> <td><code>0</code></td> <td>removed: the deprecated legacy comparison of discarded values can no longer be enabled</td> <td><a href=../../integration/cmake/#json_legacydiscardedvaluecomparison><code>JSON_LegacyDiscardedValueComparison</code></a></td> <td>3.11.0</td> </tr> <tr> <td><a href=../../api/macros/json_brace_init_copy_semantics/ ><code>JSON_BRACE_INIT_COPY_SEMANTICS</code></a></td> <td><code>0</code></td> <td><code>1</code>: single-element brace initialization such as <code class=highlight><span class=n>json</span><span class=w> </span><span class=n>j</span><span class=p>{</span><span class=n>obj</span><span class=p>};</span></code> copies the element instead of creating an array</td> <td>–</td> <td>3.13.0</td> </tr> <tr> <td><a href=../../api/macros/json_precise_stream_position/ ><code>JSON_PRECISE_STREAM_POSITION</code></a></td> <td><code>0</code></td> <td><code>1</code>: reading from a stream does not consume the character after a number</td> <td>–</td> <td>3.13.0</td> </tr> <tr> <td><a href=../../api/macros/json_strict_nul_handling/ ><code>JSON_STRICT_NUL_HANDLING</code></a></td> <td><code>0</code></td> <td><code>1</code>: a <abbr title="Null character (U+0000, byte value 0)">NUL</abbr> byte in the input is a parse error instead of the end of input</td> <td><a href=../../integration/cmake/#json_strictnulhandling><code>JSON_StrictNulHandling</code></a></td> <td>3.13.0</td> </tr> <tr> <td><a href=../../api/macros/json_strict_binary_utf8/ ><code>JSON_STRICT_BINARY_UTF8</code></a></td> <td><code>0</code></td> <td><code>1</code>: <code>to_cbor</code>, <code>to_ubjson</code>, <code>to_bjdata</code>, and <code>to_bson</code> throw for strings that are not valid <abbr title="Unicode Transformation Format">UTF</abbr>-8 by default</td> <td><a href=../../integration/cmake/#json_strictbinaryutf8><code>JSON_StrictBinaryUTF8</code></a></td> <td>3.13.0</td> </tr> <tr> <td><a href=../../api/macros/json_disable_tuple_reference_conversion/ ><code>JSON_DISABLE_TUPLE_REFERENCE_CONVERSION</code></a></td> <td><code>0</code></td> <td><code>1</code>: a <code>basic_json</code> value can no longer be created from a one-element tuple of a reference to it, such as <code>std::forward_as_tuple(j)</code></td> <td><a href=../../integration/cmake/#json_disabletuplereferenceconversion><code>JSON_DisableTupleReferenceConversion</code></a></td> <td>3.13.0</td> </tr> <tr> <td><a href=../../api/macros/json_delete_deprecated_functions/ ><code>JSON_DELETE_DEPRECATED_FUNCTIONS</code></a></td> <td><code>0</code></td> <td>removed: the deprecated functions are removed (see below); the <code>from_*(ptr, len)</code> overloads stay deleted</td> <td><a href=../../integration/cmake/#json_deletedeprecatedfunctions><code>JSON_DeleteDeprecatedFunctions</code></a></td> <td>3.13.0</td> </tr> </tbody> </table> <p class=nj-table-caption>Opt-in macros for the version 4.0 behavior. "3.x default" is the value the library uses when the macro is not defined, "Added" is the release that introduced the macro, and – means there is no CMake option.</p> <p>For example, the following makes a 3.x release behave like version 4.0 with respect to these changes:</p> <div class=highlight><pre><span></span><code><span class=cp>#define JSON_USE_IMPLICIT_CONVERSIONS 0</span>
<span class=cp>#define JSON_USE_GLOBAL_UDLS 0</span>
<span class=cp>#define JSON_USE_LEGACY_DISCARDED_VALUE_COMPARISON 0</span>
<span class=cp>#define JSON_BRACE_INIT_COPY_SEMANTICS 1</span>
<span class=cp>#define JSON_PRECISE_STREAM_POSITION 1</span>
<span class=cp>#define JSON_STRICT_NUL_HANDLING 1</span>
<span class=cp>#define JSON_STRICT_BINARY_UTF8 1</span>
<span class=cp>#define JSON_DISABLE_TUPLE_REFERENCE_CONVERSION 1</span>
<span class=cp>#define JSON_DELETE_DEPRECATED_FUNCTIONS 1</span>
<span class=cp>#include</span><span class=w> </span><span class=cpf>&lt;nlohmann/json.hpp&gt;</span>
</code></pre></div> <p>The macros must be defined before the library header is included; setting them once in the build system is the easiest way to achieve this.</p> <h3 id=removal-of-deprecated-functions>Removal of deprecated functions<a class=headerlink href=#removal-of-deprecated-functions title="Permanent link">&para;</a></h3> <p>Version 4.0 will remove all deprecated functions. Compiling with deprecation warnings enabled shows which of them your code still uses. Defining <a href=../../api/macros/json_delete_deprecated_functions/ ><code>JSON_DELETE_DEPRECATED_FUNCTIONS</code></a> to <code>1</code> turns these warnings into errors, as the deprecated functions are then deleted. The <a href=../../integration/migration_guide/#replace-deprecated-functions>migration guide</a> shows how to replace each of them.</p> <p>The <code>from_*</code> overloads taking a pointer and a length are not removed in version 4.0, but stay deleted. Without them, a call like <code>from_cbor(ptr, len)</code> would still compile: it would read <code>ptr</code> as a <abbr title="Null character (U+0000, byte value 0)">NUL</abbr>-terminated string and convert <code>len</code> to the <code>strict</code> parameter.</p> <table> <thead> <tr> <th>Deprecated</th> <th>Since</th> <th>Migration</th> </tr> </thead> <tbody> <tr> <td><code class=highlight><span class=k>operator</span><span class=o>&lt;&lt;</span><span class=p>(</span><span class=n>basic_json</span><span class=o>&amp;</span><span class=p>,</span><span class=w> </span><span class=n>std</span><span class=o>::</span><span class=n>istream</span><span class=o>&amp;</span><span class=p>)</span></code></td> <td>3.0.0</td> <td><a href=../../integration/migration_guide/#parsing>Parsing</a></td> </tr> <tr> <td><code class=highlight><span class=k>operator</span><span class=o>&gt;&gt;</span><span class=p>(</span><span class=k>const</span><span class=w> </span><span class=n>basic_json</span><span class=o>&amp;</span><span class=p>,</span><span class=w> </span><span class=n>std</span><span class=o>::</span><span class=n>ostream</span><span class=o>&amp;</span><span class=p>)</span></code></td> <td>3.0.0</td> <td><a href=../../integration/migration_guide/#miscellaneous-functions>Miscellaneous functions</a></td> </tr> <tr> <td><code>iterator_wrapper</code></td> <td>3.1.0</td> <td><a href=../../integration/migration_guide/#miscellaneous-functions>Miscellaneous functions</a></td> </tr> <tr> <td><a href=../../api/basic_json/parse/ ><code>parse</code></a>, <a href=../../api/basic_json/accept/ ><code>accept</code></a>, and <a href=../../api/basic_json/sax_parse/ ><code>sax_parse</code></a> with an initializer list <code>{ptr, len}</code> or <code>{first, last}</code></td> <td>3.8.0</td> <td><a href=../../integration/migration_guide/#parsing>Parsing</a></td> </tr> <tr> <td><a href=../../api/basic_json/from_bson/ ><code>from_bson</code></a>, <a href=../../api/basic_json/from_cbor/ ><code>from_cbor</code></a>, <a href=../../api/basic_json/from_msgpack/ ><code>from_msgpack</code></a>, and <a href=../../api/basic_json/from_ubjson/ ><code>from_ubjson</code></a> with <code>(ptr, len)</code> or an initializer list</td> <td>3.8.0</td> <td><a href=../../integration/migration_guide/#parsing>Parsing</a></td> </tr> <tr> <td><a href=../../api/json_pointer/operator_string_t/ ><code>json_pointer::operator string_t</code></a></td> <td>3.11.0</td> <td><a href=../../integration/migration_guide/#json-pointers><abbr title="JavaScript Object Notation">JSON</abbr> Pointers</a></td> </tr> <tr> <td><a href=../../api/json_pointer/ ><code>json_pointer</code></a> with a <code>basic_json</code> type as template argument, and the overloads of <code>value</code>, <code>contains</code>, <code>operator[]</code>, and <code>at</code> accepting such a pointer</td> <td>3.11.0</td> <td><a href=../../integration/migration_guide/#json-pointers><abbr title="JavaScript Object Notation">JSON</abbr> Pointers</a></td> </tr> <tr> <td>Comparing a <a href=../../api/json_pointer/ ><code>json_pointer</code></a> with a string via <a href=../../api/json_pointer/operator_eq/ ><code>operator==</code></a> or <a href=../../api/json_pointer/operator_ne/ ><code>operator!=</code></a></td> <td>3.11.2</td> <td><a href=../../integration/migration_guide/#json-pointers><abbr title="JavaScript Object Notation">JSON</abbr> Pointers</a></td> </tr> <tr> <td><a href=../../api/basic_json/from_bjdata/ ><code>from_bjdata</code></a> and <a href=../../api/basic_json/from_bon8/ ><code>from_bon8</code></a> with <code>(ptr, len)</code></td> <td>3.13.0</td> <td><a href=../../integration/migration_guide/#parsing>Parsing</a></td> </tr> </tbody> </table> <p class=nj-table-caption>Deprecated functions, with the release that deprecated each one and the section of the migration guide that shows its replacement.</p> <p>The deprecated legacy comparison of discarded values is 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