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<!doctype html><html lang=en class=no-js> <head><meta charset=utf-8><meta name=viewport content="width=device-width,initial-scale=1"><meta name=description content="JSON for Modern C++ is a header-only C++11 library that makes JSON a first-class data type."><meta name=author content="Niels Lohmann"><link href="https://json.nlohmann.me/features/binary_formats/ubjson/" rel="canonical"><link href=../messagepack/ rel=prev><link href=../../binary_values/ rel=next><link rel=icon href=../../../assets/images/favicon.png><meta name=generator content="mkdocs-1.6.1, mkdocs-material-9.8.0"><title>UBJSON - JSON for Modern C++</title><link rel=stylesheet href=../../../assets/stylesheets/main.57a0d79d.min.css><link rel=stylesheet href=../../../assets/stylesheets/palette.fb2fffe2.min.css><link rel=stylesheet href=../../../css/custom.css><link rel=stylesheet href=../../../css/brand.css><link rel=stylesheet href=../../../css/fig-sax.css><link rel=stylesheet href=../../../css/fig-jsonview.css><link 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class=md-nav__item> <a href=../../../home/releases/v2.0.9/ class=md-nav__link> <span class=md-ellipsis> v2.0.9 </span> </a> </li> <li class=md-nav__item> <a 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 md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type=checkbox id=__nav_1_6> <label class=md-nav__link for=__nav_1_6 id=__nav_1_6_label tabindex=0> <span class=md-ellipsis> Blog </span> <span class="md-nav__icon md-icon"></span> </label> <nav class=md-nav data-md-level=2 aria-labelledby=__nav_1_6_label aria-expanded=false> <label class=md-nav__title for=__nav_1_6> <span class="md-nav__icon md-icon"></span> Blog </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../../home/blog/how_3_13_0_got_faster/ class=md-nav__link> <span class=md-ellipsis> How 3.13.0 got faster </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--active md-nav__item--section md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type=checkbox id=__nav_2 checked> <div class="md-nav__link md-nav__container"> <a href=../../ class="md-nav__link "> <span class=md-ellipsis> Features </span> </a> <label class="md-nav__link " for=__nav_2 id=__nav_2_label tabindex> <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=true> <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=../../arbitrary_types/ class=md-nav__link> <span class=md-ellipsis> Arbitrary Type Conversions </span> </a> </li> <li class=md-nav__item> <a href=../../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--active md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type=checkbox id=__nav_2_4 checked> <div class="md-nav__link md-nav__container"> <a href=../ 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=true> <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=../bjdata/ class=md-nav__link> <span class=md-ellipsis> BJData </span> </a> </li> <li class=md-nav__item> <a href=../bon8/ class=md-nav__link> <span class=md-ellipsis> BON8 </span> </a> </li> <li class=md-nav__item> <a href=../bson/ class=md-nav__link> <span class=md-ellipsis> BSON </span> </a> </li> <li class=md-nav__item> <a href=../cbor/ class=md-nav__link> <span class=md-ellipsis> CBOR </span> </a> </li> <li class=md-nav__item> <a href=../messagepack/ class=md-nav__link> <span class=md-ellipsis> MessagePack </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> UBJSON </span> <span class="md-nav__icon md-icon"></span> </label> <a href=./ class="md-nav__link md-nav__link--active"> <span class=md-ellipsis> UBJSON </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=#byte-layout class=md-nav__link> <span class=md-ellipsis> Byte layout </span> </a> </li> <li class=md-nav__item> <a href=#serialization class=md-nav__link> <span class=md-ellipsis> Serialization </span> </a> </li> <li class=md-nav__item> <a href=#deserialization class=md-nav__link> <span class=md-ellipsis> Deserialization </span> </a> </li> <li class=md-nav__item> <a href=#see-also class=md-nav__link> <span class=md-ellipsis> See also </span> </a> </li> </ul> </nav> </li> </ul> </nav> </li> <li class=md-nav__item> <a href=../../binary_values/ class=md-nav__link> <span class=md-ellipsis> Binary Values </span> </a> </li> <li class=md-nav__item> <a href=../../comments/ class=md-nav__link> <span class=md-ellipsis> Comments </span> </a> </li> <li class=md-nav__item> <a href=../../conversions/ class=md-nav__link> <span class=md-ellipsis> Converting values </span> </a> </li> <li class=md-nav__item> <a href=../../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=../../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=../../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=../../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=../../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=../../files/ class=md-nav__link> <span class=md-ellipsis> Reading and writing files </span> </a> </li> <li class=md-nav__item> <a href=../../iterators/ class=md-nav__link> <span class=md-ellipsis> Iterators </span> </a> </li> <li class=md-nav__item> <a href=../../merge_patch/ class=md-nav__link> <span class=md-ellipsis> JSON Merge Patch </span> </a> </li> <li class=md-nav__item> <a href=../../json_patch/ class=md-nav__link> <span class=md-ellipsis> JSON Patch and Diff </span> </a> </li> <li class=md-nav__item> <a href=../../json_pointer/ class=md-nav__link> <span class=md-ellipsis> JSON Pointer </span> </a> </li> <li class=md-nav__item> <a href=../../modifying_values/ class=md-nav__link> <span class=md-ellipsis> Modifying values </span> </a> </li> <li class=md-nav__item> <a href=../../modules/ class=md-nav__link> <span class=md-ellipsis> Modules </span> </a> </li> <li class=md-nav__item> <a href=../../namespace/ class=md-nav__link> <span class=md-ellipsis> nlohmann Namespace </span> </a> </li> <li class=md-nav__item> <a href=../../no_exceptions/ class=md-nav__link> <span class=md-ellipsis> Working Without Exceptions </span> </a> </li> <li class=md-nav__item> <a href=../../object_order/ class=md-nav__link> <span class=md-ellipsis> Object Order </span> </a> </li> <li class=md-nav__item> <a href=../../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_21> <div class="md-nav__link md-nav__container"> <a href=../../parsing/ class="md-nav__link "> <span class=md-ellipsis> Parsing </span> </a> <label class="md-nav__link " for=__nav_2_21 id=__nav_2_21_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_21_label aria-expanded=false> <label class=md-nav__title for=__nav_2_21> <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=../../parsing/json_lines/ class=md-nav__link> <span class=md-ellipsis> JSON Lines </span> </a> </li> <li class=md-nav__item> <a href=../../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=../../parsing/parse_exceptions/ class=md-nav__link> <span class=md-ellipsis> Parsing and Exceptions </span> </a> </li> <li class=md-nav__item> <a href=../../parsing/parser_callbacks/ class=md-nav__link> <span class=md-ellipsis> Parser Callbacks </span> </a> </li> <li class=md-nav__item> <a href=../../parsing/sax_interface/ class=md-nav__link> <span class=md-ellipsis> SAX Interface </span> </a> </li> <li class=md-nav__item> <a href=../../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=../../assertions/ class=md-nav__link> <span class=md-ellipsis> Runtime Assertions </span> </a> </li> <li class=md-nav__item> <a href=../../serialization/ class=md-nav__link> <span class=md-ellipsis> Serialization </span> </a> </li> <li class=md-nav__item> <a href=../../enum_conversion/ class=md-nav__link> <span class=md-ellipsis> Specializing enum conversion </span> </a> </li> <li class=md-nav__item> <a href=../../macros/ class=md-nav__link> <span class=md-ellipsis> Supported Macros </span> </a> </li> <li class=md-nav__item> <a href=../../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_27> <div class="md-nav__link md-nav__container"> <a href=../../types/ class="md-nav__link "> <span class=md-ellipsis> Types </span> </a> <label class="md-nav__link " for=__nav_2_27 id=__nav_2_27_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_27_label aria-expanded=false> <label class=md-nav__title for=__nav_2_27> <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=../../types/number_handling/ class=md-nav__link> <span class=md-ellipsis> Number Handling </span> </a> </li> <li class=md-nav__item> <a href=../../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 md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type=checkbox id=__nav_2_28> <div class="md-nav__link md-nav__container"> <a href=../../json_view/ class="md-nav__link "> <span class=md-ellipsis> Zero-copy views </span> </a> <label class="md-nav__link " for=__nav_2_28 id=__nav_2_28_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_28_label aria-expanded=false> <label class=md-nav__title for=__nav_2_28> <span class="md-nav__icon md-icon"></span> Zero-copy views </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../json_view/lifetime/ class=md-nav__link> <span class=md-ellipsis> Ownership and lifetime </span> </a> </li> <li class=md-nav__item> <a href=../../json_view/differences/ class=md-nav__link> <span class=md-ellipsis> Differences from basic_json </span> </a> </li> <li class=md-nav__item> <a href=../../json_view/reading/ class=md-nav__link> <span class=md-ellipsis> Reading values </span> </a> </li> <li class=md-nav__item> <a href=../../json_view/generic_code/ class=md-nav__link> <span class=md-ellipsis> Writing generic code </span> </a> </li> <li class=md-nav__item> <a href=../../json_view/editing/ class=md-nav__link> <span class=md-ellipsis> Editing a document </span> </a> </li> <li class=md-nav__item> <a href=../../json_view/images/ class=md-nav__link> <span class=md-ellipsis> Images </span> </a> </li> </ul> </nav> </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<basic_json> </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<basic_json> </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<basic_json> </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_recursion_depth_limit/ class=md-nav__link> <span class=md-ellipsis> JSON_RECURSION_DEPTH_LIMIT </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_ubjson_valueless_elements_per_byte/ class=md-nav__link> <span class=md-ellipsis> JSON_UBJSON_VALUELESS_ELEMENTS_PER_BYTE </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--nested"> <input class="md-nav__toggle md-toggle " type=checkbox id=__nav_5> <div class="md-nav__link md-nav__container"> <a href=../../../community/ class="md-nav__link "> <span class=md-ellipsis> Community </span> </a> <label class="md-nav__link " for=__nav_5 id=__nav_5_label tabindex=0> <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=false> <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=../../../community/ecosystem/ class=md-nav__link> <span class=md-ellipsis> Ecosystem </span> </a> </li> <li class=md-nav__item> <a href=../../../community/code_of_conduct/ class=md-nav__link> <span class=md-ellipsis> Code of Conduct </span> </a> </li> <li class=md-nav__item> <a href=../../../community/contribution_guidelines/ class=md-nav__link> <span class=md-ellipsis> Contribution Guidelines </span> </a> </li> <li class=md-nav__item> <a href=../../../community/quality_assurance/ class=md-nav__link> <span class=md-ellipsis> Quality assurance </span> </a> </li> <li class=md-nav__item> <a href=../../../community/governance/ class=md-nav__link> <span class=md-ellipsis> Governance </span> </a> </li> <li class=md-nav__item> <a href=../../../community/roadmap/ class=md-nav__link> <span class=md-ellipsis> Roadmap </span> </a> </li> <li class=md-nav__item> <a href=../../../community/security_policy/ class=md-nav__link> <span class=md-ellipsis> Security Policy </span> </a> </li> <li class=md-nav__item> <a href=../../../community/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=#byte-layout class=md-nav__link> <span class=md-ellipsis> Byte layout </span> </a> </li> <li class=md-nav__item> <a href=#serialization class=md-nav__link> <span class=md-ellipsis> Serialization </span> </a> </li> <li class=md-nav__item> <a href=#deserialization class=md-nav__link> <span class=md-ellipsis> Deserialization </span> </a> </li> <li class=md-nav__item> <a href=#see-also class=md-nav__link> <span class=md-ellipsis> See also </span> </a> </li> </ul> </nav> </div> </div> </div> <div class=md-content data-md-component=content> <article class="md-content__inner md-typeset"> <a href="https://github.com/nlohmann/json/edit/develop/docs/mkdocs/docs/features/binary_formats/ubjson.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/features/binary_formats/ubjson.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=ubjson><abbr title="Universal Binary JSON">UBJSON</abbr><a class=headerlink href=#ubjson title="Permanent link">¶</a></h1> <p>Universal Binary <abbr title="JavaScript Object Notation">JSON</abbr> (<abbr title="Universal Binary JSON">UBJSON</abbr>) is a binary form directly imitating <abbr title="JavaScript Object Notation">JSON</abbr>, but requiring fewer bytes of data. It aims to achieve the generality of <abbr title="JavaScript Object Notation">JSON</abbr>, combined with being much easier to process than <abbr title="JavaScript Object Notation">JSON</abbr>.</p> <div class="admonition abstract"> <p class=admonition-title>References</p> <ul> <li><a href="https://ubjson.org"><abbr title="Universal Binary JSON">UBJSON</abbr> Website</a></li> </ul> </div> <h2 id=byte-layout>Byte layout<a class=headerlink href=#byte-layout title="Permanent link">¶</a></h2> <p><abbr title="Universal Binary JSON">UBJSON</abbr> is built from just a one-byte, human-readable <abbr title="American Standard Code for Information Interchange">ASCII</abbr> <em>type marker</em> (for example, <code>i</code> for int8, <code>S</code> for string, <code>[</code> for array) followed by the payload of that type. Strings and the like are prefixed with their length, which is itself a <abbr title="Universal Binary JSON">UBJSON</abbr> integer value including its marker. Numbers are stored in big-endian byte order. Containers can be written in two ways: as an <em>unoptimized</em> container that is opened with <code>[</code> or <code>{</code> and closed with <code>]</code> or <code>}</code>, or as an <em>optimized</em> container that declares a count (<code>#</code>) after the opening marker, optionally preceded by an element type (<code>$</code>); an element type is only allowed together with a count. An optimized container saves the closing marker and, with a type, the per-element markers.</p> <p>Consider the following <abbr title="JavaScript Object Notation">JSON</abbr> value (shown formatted for readability):</p> <div class=highlight><pre><span></span><code><span class=p>{</span>
|
|
<span class=w> </span><span class=nt>"id"</span><span class=p>:</span><span class=w> </span><span class=mi>300</span><span class=p>,</span>
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<span class=w> </span><span class=nt>"name"</span><span class=p>:</span><span class=w> </span><span class=s2>"json"</span><span class=p>,</span>
|
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<span class=w> </span><span class=nt>"pi"</span><span class=p>:</span><span class=w> </span><span class=mf>3.14</span><span class=p>,</span>
|
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<span class=w> </span><span class=nt>"tags"</span><span class=p>:</span><span class=w> </span><span class=p>[</span>
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<span class=w> </span><span class=s2>"a"</span><span class=p>,</span>
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<span class=w> </span><span class=s2>"b"</span>
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<span class=w> </span><span class=p>]</span>
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<span class=p>}</span>
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</code></pre></div> <p><code>to_ubjson</code> encodes it to 51 bytes (shown in hexadecimal; the encoding contains no whitespace). The colors mark the role of each byte: <span class="bl bl-t">type/marker</span> <span class="bl bl-l">length/count/size</span> <span class="bl bl-d">data</span>.</p> <div class=byte-layout markdown=0><table> <thead><tr><th>JSON</th><th>Bytes</th><th>Meaning</th></tr></thead><tbody> <tr><td><code>{</code></td><td><span class="bl bl-t">7B</span></td><td>object start (<code>{</code>)</td></tr> <tr><td><code>"id": 300,</code></td><td><span class="bl bl-l">69 02</span> <span class="bl bl-d">69 64</span> <span class="bl bl-t">49</span> <span class="bl bl-d">01 2C</span></td><td>key: length 2 as int8 (<code>i</code>), then UTF-8 bytes; value: int16 (<code>I</code>), big-endian</td></tr> <tr><td><code>"name": "json",</code></td><td><span class="bl bl-l">69 04</span> <span class="bl bl-d">6E 61 6D 65</span> <span class="bl bl-t">53</span> <span class="bl bl-l">69 04</span> <span class="bl bl-d">6A 73 6F 6E</span></td><td>key: length 4; value: string (<code>S</code>), length 4 as int8, UTF-8 bytes</td></tr> <tr><td><code>"pi": 3.14,</code></td><td><span class="bl bl-l">69 02</span> <span class="bl bl-d">70 69</span> <span class="bl bl-t">44</span> <span class="bl bl-d">40 09 1E B8 51 EB 85 1F</span></td><td>key: length 2; value: float64 (<code>D</code>), big-endian</td></tr> <tr><td><code>"tags": [</code></td><td><span class="bl bl-l">69 04</span> <span class="bl bl-d">74 61 67 73</span> <span class="bl bl-t">5B</span></td><td>key: length 4; value: array start (<code>[</code>)</td></tr> <tr><td><code>"a",</code></td><td><span class="bl bl-t">53</span> <span class="bl bl-l">69 01</span> <span class="bl bl-d">61</span></td><td>string, length 1</td></tr> <tr><td><code>"b"</code></td><td><span class="bl bl-t">53</span> <span class="bl bl-l">69 01</span> <span class="bl bl-d">62</span></td><td>string, length 1</td></tr> <tr><td><code>]</code></td><td><span class="bl bl-t">5D</span></td><td>array end (<code>]</code>)</td></tr> <tr><td><code>}</code></td><td><span class="bl bl-t">7D</span></td><td>object end (<code>}</code>)</td></tr> </tbody></table></div> <h2 id=serialization>Serialization<a class=headerlink href=#serialization title="Permanent link">¶</a></h2> <p>The library uses the following mapping from <abbr title="JavaScript Object Notation">JSON</abbr> values types to <abbr title="Universal Binary JSON">UBJSON</abbr> types according to the <abbr title="Universal Binary JSON">UBJSON</abbr> specification:</p> <table> <thead> <tr> <th><abbr title="JavaScript Object Notation">JSON</abbr> value type</th> <th>value/range</th> <th><abbr title="Universal Binary JSON">UBJSON</abbr> type</th> <th>marker</th> </tr> </thead> <tbody> <tr> <td>null</td> <td><code>null</code></td> <td>null</td> <td><code>Z</code></td> </tr> <tr> <td>boolean</td> <td><code>true</code></td> <td>true</td> <td><code>T</code></td> </tr> <tr> <td>boolean</td> <td><code>false</code></td> <td>false</td> <td><code>F</code></td> </tr> <tr> <td>number_integer</td> <td>-9223372036854775808..-2147483649</td> <td>int64</td> <td><code>L</code></td> </tr> <tr> <td>number_integer</td> <td>-2147483648..-32769</td> <td>int32</td> <td><code>l</code></td> </tr> <tr> <td>number_integer</td> <td>-32768..-129</td> <td>int16</td> <td><code>I</code></td> </tr> <tr> <td>number_integer</td> <td>-128..127</td> <td>int8</td> <td><code>i</code></td> </tr> <tr> <td>number_integer</td> <td>128..255</td> <td>uint8</td> <td><code>U</code></td> </tr> <tr> <td>number_integer</td> <td>256..32767</td> <td>int16</td> <td><code>I</code></td> </tr> <tr> <td>number_integer</td> <td>32768..2147483647</td> <td>int32</td> <td><code>l</code></td> </tr> <tr> <td>number_integer</td> <td>2147483648..9223372036854775807</td> <td>int64</td> <td><code>L</code></td> </tr> <tr> <td>number_unsigned</td> <td>0..127</td> <td>int8</td> <td><code>i</code></td> </tr> <tr> <td>number_unsigned</td> <td>128..255</td> <td>uint8</td> <td><code>U</code></td> </tr> <tr> <td>number_unsigned</td> <td>256..32767</td> <td>int16</td> <td><code>I</code></td> </tr> <tr> <td>number_unsigned</td> <td>32768..2147483647</td> <td>int32</td> <td><code>l</code></td> </tr> <tr> <td>number_unsigned</td> <td>2147483648..9223372036854775807</td> <td>int64</td> <td><code>L</code></td> </tr> <tr> <td>number_unsigned</td> <td>9223372036854775808..18446744073709551615</td> <td>high-precision</td> <td><code>H</code></td> </tr> <tr> <td>number_float</td> <td><em>any value</em></td> <td>float64 (float32 if <code>number_float_t</code> is <code>float</code>)</td> <td><code>D</code> (<code>d</code>)</td> </tr> <tr> <td>string</td> <td><em>with shortest length indicator</em></td> <td>string</td> <td><code>S</code></td> </tr> <tr> <td>array</td> <td><em>see notes on optimized format</em></td> <td>array</td> <td><code>[</code></td> </tr> <tr> <td>object</td> <td><em>see notes on optimized format</em></td> <td>object</td> <td><code>{</code></td> </tr> </tbody> </table> <div class="admonition success"> <p class=admonition-title>Complete mapping</p> <p>The mapping is <strong>complete</strong> in the sense that any <abbr title="JavaScript Object Notation">JSON</abbr> value type can be converted to a <abbr title="Universal Binary JSON">UBJSON</abbr> value.</p> <p>Any <abbr title="Universal Binary JSON">UBJSON</abbr> output created by <code>to_ubjson</code> can be successfully parsed by <code>from_ubjson</code>.</p> </div> <div class="admonition warning"> <p class=admonition-title>Size constraints</p> <p>The following values can <strong>not</strong> be converted to a <abbr title="Universal Binary JSON">UBJSON</abbr> value:</p> <ul> <li>strings with more than 9223372036854775807 bytes (theoretical)</li> </ul> </div> <div class="admonition warning"> <p class=admonition-title><abbr title="Unicode Transformation Format">UTF</abbr>-8 validation of string values and object keys</p> <p><abbr title="Universal Binary JSON">UBJSON</abbr>'s required string encoding is <abbr title="Unicode Transformation Format">UTF</abbr>-8. By default (the <a href=../../../api/basic_json/to_ubjson/ ><code>error_handler</code></a> parameter left at <code>keep</code>), <code>to_ubjson()</code> writes the bytes of string values and object keys unchanged, even if they are not valid <abbr title="Unicode Transformation Format">UTF</abbr>-8. With <code>error_handler_t::strict</code>, it throws <a href=../../../home/exceptions/#jsonexceptiontype_error316><code>type_error.316</code></a> for ill-formed <abbr title="Unicode Transformation Format">UTF</abbr>-8 instead; <code>replace</code>/<code>ignore</code> sanitize the string. <a href=../../../api/macros/json_strict_binary_utf8/ ><code>JSON_STRICT_BINARY_UTF8</code></a> makes <code>strict</code> the default.</p> </div> <div class="admonition info"> <p class=admonition-title>Unused <abbr title="Universal Binary JSON">UBJSON</abbr> markers</p> <p>The following markers are not used in the conversion:</p> <ul> <li><code>N</code>: no-op values are never written (they are skipped when reading).</li> <li><code>C</code>: single-byte strings are serialized with <code>S</code> markers.</li> </ul> </div> <div class="admonition info"> <p class=admonition-title><abbr title="Not a Number">NaN</abbr>/infinity handling</p> <p><abbr title="Not a Number">NaN</abbr> and infinity are written as <abbr title="Institute of Electrical and Electronics Engineers">IEEE</abbr> 754 float64 values (<code>D</code>) and read back unchanged. This differs from <a href=../../../api/basic_json/dump/ ><code>dump()</code></a>, which serializes them to <code>null</code>, and from the <abbr title="Universal Binary JSON">UBJSON</abbr> specification, which encodes infinity as <code>null</code> (it does not mention <abbr title="Not a Number">NaN</abbr>); other <abbr title="Universal Binary JSON">UBJSON</abbr> readers may therefore not accept these values.</p> </div> <div class="admonition info"> <p class=admonition-title>Optimized formats</p> <p>The optimized formats for containers are supported: Parameter <code>use_size</code> adds size information to the beginning of a container and removes the closing marker. Parameter <code>use_type</code> further checks whether all elements of a container have the same type and adds the type marker to the beginning of the container. The <code>use_type</code> parameter must only be used together with <code>use_size = true</code>: combining <code>use_type</code> with <code>use_size = false</code> throws <a href=../../../home/exceptions/#jsonexceptionother_error502><code>other_error.502</code></a> if the value contains a non-empty array, object, or binary value.</p> <p>Two elements have the same type if they are written with the same type marker. For example, <code>[1, 2]</code> is written with the type <code>i</code>, but <code>[1, 200]</code> (<code>i</code>, <code>U</code>), <code>[true, false]</code> (<code>T</code>, <code>F</code>), and <code>[1, 2.5]</code> (<code>i</code>, <code>D</code>) are not; an empty container is never given a <code>$</code> annotation of its own (an array of empty arrays is still typed <code>[</code>).</p> <p>Note that <code>use_size = true</code> alone may result in larger representations - the benefit of this parameter is that the receiving side is immediately informed on the number of elements of the container.</p> <p>An array whose type marker is <code>Z</code> (null), <code>T</code> (true) or <code>F</code> (false) stores no payload at all, because the marker already is the value. Its declared count is therefore the only thing that decides how much memory the receiving side allocates, and a handful of bytes can describe billions of elements. <code>from_ubjson</code> rejects such an array with <a href=../../../home/exceptions/#jsonexceptionout_of_range408><code>out_of_range.408</code></a> when the count exceeds 1,048,576 (<code>1 << 20</code>), or when the counts of all such arrays in the input add up to more than 1,048,576 plus <em>K</em> for every byte read so far, where <em>K</em> is the value of the macro <a href=../../../api/macros/json_ubjson_valueless_elements_per_byte/ ><code>JSON_UBJSON_VALUELESS_ELEMENTS_PER_BYTE</code></a> (4 by default). <code>to_ubjson</code> therefore writes an array of these types in the counted but untyped form when it is longer than that, or when it would bring the total of the typed arrays written so far above 1,048,576: the <code>$</code> type marker is dropped, the <code>#</code> count is kept, and every element is written with its own marker (<code>[#l 1048577 Z Z ...</code>), so everything it produces can be read back. Only input from another encoder, or written by version 3.12.0 and earlier of this library, can exceed the limit: for example, 1,100 rows of 1,000 <code>null</code> values or 210,000 rows of 25, each with a <code>$Z</code> annotation. Version 3.12.0 writes a row in 5 bytes (6 above 255 elements, 8 above 32,767), which raises the limit by 5 <em>K</em> (6 <em>K</em>, 8 <em>K</em>), so rows of up to 5 <em>K</em> values (20 at the default) are never rejected. To read such a file, define the macro to a larger value (<code>8</code> is enough for the 1,100 rows of 1,000 <code>null</code> values; memory for the arrays then rises to about 20 <em>K</em> bytes per byte of input in a <abbr title="Document Object Model">DOM</abbr>); the macro's page explains how to choose a value and what it costs. The limit of one array of 1,048,576 elements does not depend on the macro. Objects and untyped counted arrays are not subject to this limit.</p> <p>An optimized array of type <code>N</code> (no-op) is empty whatever its count is, because a no-op is not a value. Its count is not passed on: <code>sax_parse</code> reports <code>start_array(0)</code> (versions before 3.13.0 reported the declared count), and the <abbr title="Document Object Model">DOM</abbr> parser reserves nothing for it.</p> <p>An optimized array of type <code>N</code> (no-op) is empty whatever its count is, because a no-op is not a value. Its count is not passed on: <code>sax_parse</code> reports <code>start_array(0)</code> (versions before 3.13.0 reported the declared count), and the <abbr title="Document Object Model">DOM</abbr> parser reserves nothing for it.</p> </div> <div class="admonition info"> <p class=admonition-title>Binary values</p> <p>If the <abbr title="JavaScript Object Notation">JSON</abbr> data contains the binary type, the value stored is a list of integers, as suggested by the <abbr title="Universal Binary JSON">UBJSON</abbr> documentation. In particular, this means that serialization and the deserialization of a <abbr title="JavaScript Object Notation">JSON</abbr> containing binary values into <abbr title="Universal Binary JSON">UBJSON</abbr> and back will result in a different <abbr title="JavaScript Object Notation">JSON</abbr> object.</p> </div> <details class=example> <summary>Example: serialize <abbr title="JavaScript Object Notation">JSON</abbr> values to <abbr title="Universal Binary JSON">UBJSON</abbr>, with and without size/type optimization</summary> <div class=highlight><pre><span></span><code><span class=cp>#include</span><span class=w> </span><span class=cpf><iostream></span>
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<span class=cp>#include</span><span class=w> </span><span class=cpf><iomanip></span>
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<span class=cp>#include</span><span class=w> </span><span class=cpf><nlohmann/json.hpp></span>
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<span class=k>using</span><span class=w> </span><span class=n>nlohmann</span><span class=o>::</span><span class=n>json</span><span class=p>;</span>
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<span class=k>using</span><span class=w> </span><span class=k>namespace</span><span class=w> </span><span class=nn>nlohmann</span><span class=o>::</span><span class=nn>literals</span><span class=p>;</span>
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<span class=c1>// function to print UBJSON's diagnostic format</span>
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<span class=kt>void</span><span class=w> </span><span class=nf>print_byte</span><span class=p>(</span><span class=kt>uint8_t</span><span class=w> </span><span class=kt>byte</span><span class=p>)</span>
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<span class=p>{</span>
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<span class=w> </span><span class=k>if</span><span class=w> </span><span class=p>(</span><span class=mi>32</span><span class=w> </span><span class=o><</span><span class=w> </span><span class=kt>byte</span><span class=w> </span><span class=k>and</span><span class=w> </span><span class=kt>byte</span><span class=w> </span><span class=o><</span><span class=w> </span><span class=mi>128</span><span class=p>)</span>
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<span class=w> </span><span class=p>{</span>
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<span class=w> </span><span class=n>std</span><span class=o>::</span><span class=n>cout</span><span class=w> </span><span class=o><<</span><span class=w> </span><span class=k>static_cast</span><span class=o><</span><span class=kt>char</span><span class=o>></span><span class=p>(</span><span class=kt>byte</span><span class=p>);</span>
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<span class=w> </span><span class=p>}</span>
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<span class=w> </span><span class=k>else</span>
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<span class=w> </span><span class=p>{</span>
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<span class=w> </span><span class=n>std</span><span class=o>::</span><span class=n>cout</span><span class=w> </span><span class=o><<</span><span class=w> </span><span class=k>static_cast</span><span class=o><</span><span class=kt>int</span><span class=o>></span><span class=p>(</span><span class=kt>byte</span><span class=p>);</span>
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<span class=w> </span><span class=p>}</span>
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<span class=p>}</span>
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<span class=kt>int</span><span class=w> </span><span class=nf>main</span><span class=p>()</span>
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<span class=p>{</span>
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<span class=w> </span><span class=c1>// create a JSON value</span>
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<span class=w> </span><span class=n>json</span><span class=w> </span><span class=n>j</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=sa>R</span><span class=s>"</span><span class=dl>(</span><span class=s>{"compact": true, "schema": false}</span><span class=dl>)</span><span class=s>"</span><span class=n>_json</span><span class=p>;</span>
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<span class=w> </span><span class=c1>// serialize it to UBJSON</span>
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<span class=w> </span><span class=n>std</span><span class=o>::</span><span class=n>vector</span><span class=o><</span><span class=n>std</span><span class=o>::</span><span class=kt>uint8_t</span><span class=o>></span><span class=w> </span><span class=n>v</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=n>json</span><span class=o>::</span><span class=n>to_ubjson</span><span class=p>(</span><span class=n>j</span><span class=p>);</span>
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<span class=w> </span><span class=c1>// print the vector content</span>
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<span class=w> </span><span class=k>for</span><span class=w> </span><span class=p>(</span><span class=k>auto</span><span class=o>&</span><span class=w> </span><span class=kt>byte</span><span class=w> </span><span class=o>:</span><span class=w> </span><span class=n>v</span><span class=p>)</span>
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<span class=w> </span><span class=p>{</span>
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<span class=w> </span><span class=n>print_byte</span><span class=p>(</span><span class=kt>byte</span><span class=p>);</span>
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<span class=w> </span><span class=p>}</span>
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<span class=w> </span><span class=n>std</span><span class=o>::</span><span class=n>cout</span><span class=w> </span><span class=o><<</span><span class=w> </span><span class=sc>'\n'</span><span class=p>;</span>
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<span class=w> </span><span class=c1>// create an array of numbers</span>
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<span class=w> </span><span class=n>json</span><span class=w> </span><span class=n>array</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=p>{</span><span class=mi>1</span><span class=p>,</span><span class=w> </span><span class=mi>2</span><span class=p>,</span><span class=w> </span><span class=mi>3</span><span class=p>,</span><span class=w> </span><span class=mi>4</span><span class=p>,</span><span class=w> </span><span class=mi>5</span><span class=p>,</span><span class=w> </span><span class=mi>6</span><span class=p>,</span><span class=w> </span><span class=mi>7</span><span class=p>,</span><span class=w> </span><span class=mi>8</span><span class=p>};</span>
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<span class=w> </span><span class=c1>// serialize it to UBJSON using default representation</span>
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<span class=w> </span><span class=n>std</span><span class=o>::</span><span class=n>vector</span><span class=o><</span><span class=n>std</span><span class=o>::</span><span class=kt>uint8_t</span><span class=o>></span><span class=w> </span><span class=n>v_array</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=n>json</span><span class=o>::</span><span class=n>to_ubjson</span><span class=p>(</span><span class=n>array</span><span class=p>);</span>
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<span class=w> </span><span class=c1>// serialize it to UBJSON using size optimization</span>
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<span class=w> </span><span class=n>std</span><span class=o>::</span><span class=n>vector</span><span class=o><</span><span class=n>std</span><span class=o>::</span><span class=kt>uint8_t</span><span class=o>></span><span class=w> </span><span class=n>v_array_size</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=n>json</span><span class=o>::</span><span class=n>to_ubjson</span><span class=p>(</span><span class=n>array</span><span class=p>,</span><span class=w> </span><span class=nb>true</span><span class=p>);</span>
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<span class=w> </span><span class=c1>// serialize it to UBJSON using type optimization</span>
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<span class=w> </span><span class=n>std</span><span class=o>::</span><span class=n>vector</span><span class=o><</span><span class=n>std</span><span class=o>::</span><span class=kt>uint8_t</span><span class=o>></span><span class=w> </span><span class=n>v_array_size_and_type</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=n>json</span><span class=o>::</span><span class=n>to_ubjson</span><span class=p>(</span><span class=n>array</span><span class=p>,</span><span class=w> </span><span class=nb>true</span><span class=p>,</span><span class=w> </span><span class=nb>true</span><span class=p>);</span>
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<span class=w> </span><span class=c1>// print the vector contents</span>
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<span class=w> </span><span class=k>for</span><span class=w> </span><span class=p>(</span><span class=k>auto</span><span class=o>&</span><span class=w> </span><span class=kt>byte</span><span class=w> </span><span class=o>:</span><span class=w> </span><span class=n>v_array</span><span class=p>)</span>
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<span class=w> </span><span class=p>{</span>
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<span class=w> </span><span class=n>print_byte</span><span class=p>(</span><span class=kt>byte</span><span class=p>);</span>
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<span class=w> </span><span class=p>}</span>
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<span class=w> </span><span class=n>std</span><span class=o>::</span><span class=n>cout</span><span class=w> </span><span class=o><<</span><span class=w> </span><span class=sc>'\n'</span><span class=p>;</span>
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<span class=w> </span><span class=k>for</span><span class=w> </span><span class=p>(</span><span class=k>auto</span><span class=o>&</span><span class=w> </span><span class=kt>byte</span><span class=w> </span><span class=o>:</span><span class=w> </span><span class=n>v_array_size</span><span class=p>)</span>
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<span class=w> </span><span class=p>{</span>
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<span class=w> </span><span class=n>print_byte</span><span class=p>(</span><span class=kt>byte</span><span class=p>);</span>
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<span class=w> </span><span class=p>}</span>
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<span class=w> </span><span class=n>std</span><span class=o>::</span><span class=n>cout</span><span class=w> </span><span class=o><<</span><span class=w> </span><span class=sc>'\n'</span><span class=p>;</span>
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<span class=w> </span><span class=k>for</span><span class=w> </span><span class=p>(</span><span class=k>auto</span><span class=o>&</span><span class=w> </span><span class=kt>byte</span><span class=w> </span><span class=o>:</span><span class=w> </span><span class=n>v_array_size_and_type</span><span class=p>)</span>
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<span class=w> </span><span class=p>{</span>
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<span class=w> </span><span class=n>print_byte</span><span class=p>(</span><span class=kt>byte</span><span class=p>);</span>
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<span class=w> </span><span class=p>}</span>
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<span class=w> </span><span class=n>std</span><span class=o>::</span><span class=n>cout</span><span class=w> </span><span class=o><<</span><span class=w> </span><span class=sc>'\n'</span><span class=p>;</span>
|
|
<span class=p>}</span>
|
|
</code></pre></div> <p>Output:</p> <div class=highlight><pre><span></span><code><span class=p>{</span><span class=n>i7compactTi6schemaF</span><span class=p>}</span>
|
|
<span class=p>[</span><span class=n>i1i2i3i4i5i6i7i8</span><span class=p>]</span>
|
|
<span class=p>[</span><span class=err>#</span><span class=n>i8i1i2i3i4i5i6i7i8</span>
|
|
<span class=p>[</span><span class=n>$i</span><span class=err>#</span><span class=n>i812345678</span>
|
|
</code></pre></div> </details> <h2 id=deserialization>Deserialization<a class=headerlink href=#deserialization title="Permanent link">¶</a></h2> <p>The library maps <abbr title="Universal Binary JSON">UBJSON</abbr> types to <abbr title="JavaScript Object Notation">JSON</abbr> value types as follows:</p> <table> <thead> <tr> <th><abbr title="Universal Binary JSON">UBJSON</abbr> type</th> <th><abbr title="JavaScript Object Notation">JSON</abbr> value type</th> <th>marker</th> </tr> </thead> <tbody> <tr> <td>no-op</td> <td><em>no value, next value is read</em></td> <td><code>N</code></td> </tr> <tr> <td>null</td> <td><code>null</code></td> <td><code>Z</code></td> </tr> <tr> <td>false</td> <td><code>false</code></td> <td><code>F</code></td> </tr> <tr> <td>true</td> <td><code>true</code></td> <td><code>T</code></td> </tr> <tr> <td>float32</td> <td>number_float</td> <td><code>d</code></td> </tr> <tr> <td>float64</td> <td>number_float</td> <td><code>D</code></td> </tr> <tr> <td>uint8</td> <td>number_unsigned</td> <td><code>U</code></td> </tr> <tr> <td>int8</td> <td>number_integer</td> <td><code>i</code></td> </tr> <tr> <td>int16</td> <td>number_integer</td> <td><code>I</code></td> </tr> <tr> <td>int32</td> <td>number_integer</td> <td><code>l</code></td> </tr> <tr> <td>int64</td> <td>number_integer</td> <td><code>L</code></td> </tr> <tr> <td>string</td> <td>string</td> <td><code>S</code></td> </tr> <tr> <td>char</td> <td>string</td> <td><code>C</code></td> </tr> <tr> <td>high-precision</td> <td>number_unsigned, number_integer, or number_float</td> <td><code>H</code></td> </tr> <tr> <td>array</td> <td>array (optimized values are supported)</td> <td><code>[</code></td> </tr> <tr> <td>object</td> <td>object (optimized values are supported)</td> <td><code>{</code></td> </tr> </tbody> </table> <div class="admonition info"> <p class=admonition-title>High-precision numbers</p> <p>The payload of <code>H</code> is a length-prefixed string that is parsed as a <abbr title="JavaScript Object Notation">JSON</abbr> number (surrounding whitespace is ignored). Integer text in the range of <code>number_unsigned_t</code> (non-negative) or <code>number_integer_t</code> (negative) is stored as such; any other valid number text (larger or smaller integers, fractions, and exponents such as <code>1e2</code>) is stored as <code>number_float</code>, so precision may be lost. Text that is not a valid <abbr title="JavaScript Object Notation">JSON</abbr> number raises <a href=../../../home/exceptions/#jsonexceptionparse_error115><code>parse_error.115</code></a>, a number outside the range of <code>number_float_t</code> (<code>1e999</code>) raises <a href=../../../home/exceptions/#jsonexceptionout_of_range406><code>out_of_range.406</code></a>.</p> </div> <div class="admonition success"> <p class=admonition-title>Complete mapping</p> <p>Every well-formed <abbr title="Universal Binary JSON">UBJSON</abbr> value can be converted to a <abbr title="JavaScript Object Notation">JSON</abbr> value, with these exceptions: a high-precision number outside the range of <code>number_float_t</code> (<a href=../../../home/exceptions/#jsonexceptionout_of_range406><code>out_of_range.406</code></a>), optimized arrays of <code>Z</code>, <code>T</code>, or <code>F</code> with more elements than the limit allows (1,048,576 plus <a href=../../../api/macros/json_ubjson_valueless_elements_per_byte/ ><code>JSON_UBJSON_VALUELESS_ELEMENTS_PER_BYTE</code></a>, 4 by default, per byte read), and a count that exceeds the capacity of the container (<a href=../../../home/exceptions/#jsonexceptionout_of_range408><code>out_of_range.408</code></a>). High-precision numbers that do not fit an integer type are stored as floating-point numbers and may lose precision. Ill-formed input is rejected with a parse error.</p> </div> <div class="admonition info"> <p class=admonition-title>Duplicate object keys</p> <p>If an object contains the same key more than once, the last value is kept (the <abbr title="Universal Binary JSON">UBJSON</abbr> specification does not address duplicate keys).</p> </div> <div class="admonition info"> <p class=admonition-title>Type marker of optimized containers</p> <p>The type marker after <code>$</code> must be one of <code>Z</code>, <code>N</code>, <code>T</code>, <code>F</code>, <code>i</code>, <code>U</code>, <code>I</code>, <code>l</code>, <code>L</code>, <code>d</code>, <code>D</code>, <code>H</code>, <code>C</code>, <code>S</code>, <code>[</code>, or <code>{</code>. It is checked even if the count is 0; any other marker raises <a href=../../../home/exceptions/#jsonexceptionparse_error112><code>parse_error.112</code></a>. A counted object typed <code>N</code> (<code>{$N#i1 ...</code>) is not supported.</p> </div> <div class="admonition warning"> <p class=admonition-title>Ill-formed <abbr title="Unicode Transformation Format">UTF</abbr>-8 in string values and object keys</p> <p><abbr title="Universal Binary JSON">UBJSON</abbr>'s required string encoding is <abbr title="Unicode Transformation Format">UTF</abbr>-8, but checking it on read is opt-in: with the <a href=../../../api/basic_json/from_ubjson/ ><code>error_handler</code></a> parameter left at <code>keep</code> (the default), <code>from_ubjson()</code> accepts a string value or object key whose bytes are not valid <abbr title="Unicode Transformation Format">UTF</abbr>-8 and hands them back unchanged. Passing <code>error_handler_t::strict</code> makes <code>from_ubjson()</code> check and throw <a href=../../../home/exceptions/#jsonexceptionparse_error113><code>parse_error.113</code></a> for ill-formed <abbr title="Unicode Transformation Format">UTF</abbr>-8, and <code>replace</code>/<code>ignore</code> sanitize the string instead of keeping it. However, <a href=../../../api/basic_json/dump/ ><code>dump()</code></a> still requires valid <abbr title="Unicode Transformation Format">UTF</abbr>-8 and throws <a href=../../../home/exceptions/#jsonexceptiontype_error316><code>type_error.316</code></a> for a value read with the default <code>keep</code> handler, unless an error handler is passed that replaces or ignores the ill-formed bytes. <code>to_ubjson()</code>'s own <code>error_handler</code> parameter defaults to <code>keep</code> (see above), so such a value is written back unchanged.</p> </div> <details class=example> <summary>Example: deserialize a <abbr title="JavaScript Object Notation">JSON</abbr> value from <abbr title="Universal Binary JSON">UBJSON</abbr></summary> <div class=highlight><pre><span></span><code><span class=cp>#include</span><span class=w> </span><span class=cpf><iostream></span>
|
|
<span class=cp>#include</span><span class=w> </span><span class=cpf><iomanip></span>
|
|
<span class=cp>#include</span><span class=w> </span><span class=cpf><nlohmann/json.hpp></span>
|
|
|
|
<span class=k>using</span><span class=w> </span><span class=n>nlohmann</span><span class=o>::</span><span class=n>json</span><span class=p>;</span>
|
|
|
|
<span class=kt>int</span><span class=w> </span><span class=nf>main</span><span class=p>()</span>
|
|
<span class=p>{</span>
|
|
<span class=w> </span><span class=c1>// create byte vector</span>
|
|
<span class=w> </span><span class=n>std</span><span class=o>::</span><span class=n>vector</span><span class=o><</span><span class=n>std</span><span class=o>::</span><span class=kt>uint8_t</span><span class=o>></span><span class=w> </span><span class=n>v</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=p>{</span><span class=mh>0x7B</span><span class=p>,</span><span class=w> </span><span class=mh>0x69</span><span class=p>,</span><span class=w> </span><span class=mh>0x07</span><span class=p>,</span><span class=w> </span><span class=mh>0x63</span><span class=p>,</span><span class=w> </span><span class=mh>0x6F</span><span class=p>,</span><span class=w> </span><span class=mh>0x6D</span><span class=p>,</span><span class=w> </span><span class=mh>0x70</span><span class=p>,</span><span class=w> </span><span class=mh>0x61</span><span class=p>,</span>
|
|
<span class=w> </span><span class=mh>0x63</span><span class=p>,</span><span class=w> </span><span class=mh>0x74</span><span class=p>,</span><span class=w> </span><span class=mh>0x54</span><span class=p>,</span><span class=w> </span><span class=mh>0x69</span><span class=p>,</span><span class=w> </span><span class=mh>0x06</span><span class=p>,</span><span class=w> </span><span class=mh>0x73</span><span class=p>,</span><span class=w> </span><span class=mh>0x63</span><span class=p>,</span><span class=w> </span><span class=mh>0x68</span><span class=p>,</span>
|
|
<span class=w> </span><span class=mh>0x65</span><span class=p>,</span><span class=w> </span><span class=mh>0x6D</span><span class=p>,</span><span class=w> </span><span class=mh>0x61</span><span class=p>,</span><span class=w> </span><span class=mh>0x69</span><span class=p>,</span><span class=w> </span><span class=mh>0x00</span><span class=p>,</span><span class=w> </span><span class=mh>0x7D</span>
|
|
<span class=w> </span><span class=p>};</span>
|
|
|
|
<span class=w> </span><span class=c1>// deserialize it with UBJSON</span>
|
|
<span class=w> </span><span class=n>json</span><span class=w> </span><span class=n>j</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=n>json</span><span class=o>::</span><span class=n>from_ubjson</span><span class=p>(</span><span class=n>v</span><span class=p>);</span>
|
|
|
|
<span class=w> </span><span class=c1>// print the deserialized JSON value</span>
|
|
<span class=w> </span><span class=n>std</span><span class=o>::</span><span class=n>cout</span><span class=w> </span><span class=o><<</span><span class=w> </span><span class=n>std</span><span class=o>::</span><span class=n>setw</span><span class=p>(</span><span class=mi>2</span><span class=p>)</span><span class=w> </span><span class=o><<</span><span class=w> </span><span class=n>j</span><span class=w> </span><span class=o><<</span><span class=w> </span><span class=sc>'\n'</span><span class=p>;</span>
|
|
<span class=p>}</span>
|
|
</code></pre></div> <p>Output:</p> <div class=highlight><pre><span></span><code><span class=p>{</span>
|
|
<span class=w> </span><span class=nt>"compact"</span><span class=p>:</span><span class=w> </span><span class=kc>true</span><span class=p>,</span>
|
|
<span class=w> </span><span class=nt>"schema"</span><span class=p>:</span><span class=w> </span><span class=mi>0</span>
|
|
<span class=p>}</span>
|
|
</code></pre></div> </details> <h2 id=see-also>See also<a class=headerlink href=#see-also title="Permanent link">¶</a></h2> <ul> <li><a href=../ >Binary formats</a> - overview and comparison of the supported binary formats</li> <li><a href=../../binary_values/ >Binary values</a> - how binary values and subtypes map to <abbr title="Universal Binary JSON">UBJSON</abbr></li> <li><a href=../../../api/basic_json/to_ubjson/ ><code>to_ubjson</code></a> - serialize a <abbr title="JavaScript Object Notation">JSON</abbr> value to <abbr title="Universal Binary JSON">UBJSON</abbr></li> <li><a href=../../../api/basic_json/from_ubjson/ ><code>from_ubjson</code></a> - parse a <abbr title="JavaScript Object Notation">JSON</abbr> value from <abbr title="Universal Binary JSON">UBJSON</abbr></li> <li><a href=../../../api/macros/json_strict_binary_utf8/ ><code>JSON_STRICT_BINARY_UTF8</code></a> - reject ill-formed <abbr title="Unicode Transformation Format">UTF</abbr>-8 in strings</li> <li><a href=../../parsing/sax_interface/ ><abbr title="Simple API for XML">SAX</abbr> interface</a> - 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