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@@ -10,7 +10,7 @@
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<span class=c># If you only include this third party in PRIVATE source files, you do not need to install it</span>
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<span class=c># when your main project gets installed.</span>
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<span class=nb>set</span><span class=p>(</span><span class=s>JSON_Install</span><span class=w> </span><span class=s>OFF</span><span class=w> </span><span class=s>CACHE</span><span class=w> </span><span class=s>INTERNAL</span><span class=w> </span><span class=s2>""</span><span class=p>)</span>
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<span class=nb>set</span><span class=p>(</span><span class=s>JSON_Install</span><span class=w> </span><span class=s>OFF</span><span class=w> </span><span class=s>CACHE</span><span class=w> </span><span class=s>INTERNAL</span><span class=w> </span><span class=s2>""</span><span class=p>)</span>
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<span class=nb>add_subdirectory</span><span class=p>(</span><span class=s>nlohmann_json</span><span class=p>)</span>
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@@ -18,7 +18,7 @@
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<span class=nb>target_link_libraries</span><span class=p>(</span><span class=s>example</span><span class=w> </span><span class=s>PRIVATE</span><span class=w> </span><span class=s>nlohmann_json::nlohmann_json</span><span class=p>)</span>
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</code></pre></div> </div> <div class="admonition note"> <p class=admonition-title>Note</p> <p>Do not use <code class=highlight><span class=nb>include</span><span class=p>(</span><span class=s>nlohmann_json/CMakeLists.txt</span><span class=p>)</span></code>, since that carries with it unintended consequences that will break the build. It is generally discouraged (although not necessarily well documented as such) to use <code class=highlight><span class=nb>include</span><span class=p>(</span><span class=s>...</span><span class=p>)</span></code> for pulling in other CMake projects anyways.</p> </div> <h3 id=supporting-both>Supporting Both<a class=headerlink href=#supporting-both title="Permanent link">¶</a></h3> <p>To allow your project to support either an externally supplied or an embedded <abbr title="JavaScript Object Notation">JSON</abbr> library, you can use a pattern akin to the following.</p> <div class="admonition example"> <p class=admonition-title>Example</p> <div class=highlight><span class=filename>CMakeLists.txt</span><pre><span></span><code><span class=nb>project</span><span class=p>(</span><span class=s>ExampleProject</span><span class=w> </span><span class=s>LANGUAGES</span><span class=w> </span><span class=s>CXX</span><span class=p>)</span>
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<span class=nb>option</span><span class=p>(</span><span class=s>EXAMPLE_USE_EXTERNAL_JSON</span><span class=w> </span><span class=s2>"Use an external JSON library"</span><span class=w> </span><span class=s>OFF</span><span class=p>)</span>
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<span class=nb>option</span><span class=p>(</span><span class=s>EXAMPLE_USE_EXTERNAL_JSON</span><span class=w> </span><span class=s2>"Use an external JSON library"</span><span class=w> </span><span class=s>OFF</span><span class=p>)</span>
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<span class=nb>add_subdirectory</span><span class=p>(</span><span class=s>thirdparty</span><span class=p>)</span>
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@@ -29,7 +29,7 @@
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</code></pre></div> <div class=highlight><span class=filename>thirdparty/CMakeLists.txt</span><pre><span></span><code><span class=nb>if</span><span class=p>(</span><span class=s>EXAMPLE_USE_EXTERNAL_JSON</span><span class=p>)</span>
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<span class=w> </span><span class=nb>find_package</span><span class=p>(</span><span class=s>nlohmann_json</span><span class=w> </span><span class=s>3.12.0</span><span class=w> </span><span class=s>REQUIRED</span><span class=p>)</span>
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<span class=nb>else</span><span class=p>()</span>
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<span class=w> </span><span class=nb>set</span><span class=p>(</span><span class=s>JSON_BuildTests</span><span class=w> </span><span class=s>OFF</span><span class=w> </span><span class=s>CACHE</span><span class=w> </span><span class=s>INTERNAL</span><span class=w> </span><span class=s2>""</span><span class=p>)</span>
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<span class=w> </span><span class=nb>set</span><span class=p>(</span><span class=s>JSON_BuildTests</span><span class=w> </span><span class=s>OFF</span><span class=w> </span><span class=s>CACHE</span><span class=w> </span><span class=s>INTERNAL</span><span class=w> </span><span class=s2>""</span><span class=p>)</span>
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<span class=w> </span><span class=nb>add_subdirectory</span><span class=p>(</span><span class=s>nlohmann_json</span><span class=p>)</span>
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<span class=nb>endif</span><span class=p>()</span>
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</code></pre></div> <p><code>thirdparty/nlohmann_json</code> is then a complete copy of this source tree.</p> </div> <h3 id=fetchcontent>FetchContent<a class=headerlink href=#fetchcontent title="Permanent link">¶</a></h3> <p>Since CMake v3.11, <a href="https://cmake.org/cmake/help/v3.11/module/FetchContent.html">FetchContent</a> can be used to automatically download a release as a dependency at configure time.</p> <div class="admonition example"> <p class=admonition-title>Example</p> <div class=highlight><span class=filename>CMakeLists.txt</span><pre><span></span><code><span class=nb>cmake_minimum_required</span><span class=p>(</span><span class=s>VERSION</span><span class=w> </span><span class=s>3.11</span><span class=p>)</span>
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@@ -48,11 +48,11 @@
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<span class=p>)</span>
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</code></pre></div> <p>However, the repository <a href="https://github.com/nlohmann/json">https://github.com/nlohmann/json</a> download size is quite large.</p> </div> <h2 id=cmake-options>CMake Options<a class=headerlink href=#cmake-options title="Permanent link">¶</a></h2> <h3 id=json_buildtests><code>JSON_BuildTests</code><a class=headerlink href=#json_buildtests title="Permanent link">¶</a></h3> <p>Build the unit tests when <a href="https://cmake.org/cmake/help/latest/command/enable_testing.html"><code>BUILD_TESTING</code></a> is enabled. This option is <code>ON</code> by default if the library's CMake project is the top project. That is, when integrating the library as described above, the test suite is not built unless explicitly switched on with this option.</p> <h3 id=json_ci><code>JSON_CI</code><a class=headerlink href=#json_ci title="Permanent link">¶</a></h3> <p>Enable <abbr title="Continuous Integration">CI</abbr> build targets. The exact targets are used during the several <abbr title="Continuous Integration">CI</abbr> steps and are subject to change without notice. This option is <code>OFF</code> by default.</p> <h3 id=json_diagnostics><code>JSON_Diagnostics</code><a class=headerlink href=#json_diagnostics title="Permanent link">¶</a></h3> <p>Enable <a href=../../home/exceptions/#extended-diagnostic-messages>extended diagnostic messages</a> by defining macro <a href=../../api/macros/json_diagnostics/ ><code>JSON_DIAGNOSTICS</code></a>. This option is <code>OFF</code> by default.</p> <div class="admonition warning"> <p class=admonition-title>Does not apply to a pre-installed package</p> <p>This option only takes effect when building nlohmann/json from source as part of your own CMake project (e.g. via <a href=#fetchcontent><code>FetchContent</code></a> or <a href=#external><code>add_subdirectory</code></a>). It has <strong>no effect</strong> on a package that was already built and installed elsewhere (Homebrew, vcpkg, a system package, etc.) — the resulting compile definition is baked into the exported <code>nlohmann_jsonTargets.cmake</code> at install time, and <code>set(JSON_Diagnostics ON)</code> before <code>find_package()</code> does not change it (verified against the Homebrew-installed package: the exported target still carries a fixed <code>$<$<BOOL:OFF>:JSON_DIAGNOSTICS=1></code>, regardless of any variable set in the consuming project).</p> <p>To enable extended diagnostics for a pre-installed package, override the imported target's property directly after <code>find_package()</code>:</p> <div class=highlight><pre><span></span><code><span class=nb>find_package</span><span class=p>(</span><span class=s>nlohmann_json</span><span class=w> </span><span class=s>REQUIRED</span><span class=p>)</span>
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<span class=nb>set_target_properties</span><span class=p>(</span><span class=s>nlohmann_json::nlohmann_json</span><span class=w> </span><span class=s>PROPERTIES</span>
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<span class=w> </span><span class=s>INTERFACE_COMPILE_DEFINITIONS</span><span class=w> </span><span class=s2>"JSON_DIAGNOSTICS=1"</span><span class=p>)</span>
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<span class=w> </span><span class=s>INTERFACE_COMPILE_DEFINITIONS</span><span class=w> </span><span class=s2>"JSON_DIAGNOSTICS=1"</span><span class=p>)</span>
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</code></pre></div> <p>This only works cleanly when your project is the sole consumer of that imported target. If nlohmann_json is pulled in from more than one place in your dependency graph with different <code>JSON_DIAGNOSTICS</code> values, you may see a <code>"JSON_DIAGNOSTICS" redefined</code> compiler error, since conflicting <code>-D</code> flags can end up on the same compile command line.</p> </div> <h3 id=json_diagnostic_positions><code>JSON_Diagnostic_Positions</code><a class=headerlink href=#json_diagnostic_positions title="Permanent link">¶</a></h3> <p>Enable position diagnostics by defining macro <a href=../../api/macros/json_diagnostic_positions/ ><code>JSON_DIAGNOSTIC_POSITIONS</code></a>. This option is <code>OFF</code> by default.</p> <h3 id=json_disableenumserialization><code>JSON_DisableEnumSerialization</code><a class=headerlink href=#json_disableenumserialization title="Permanent link">¶</a></h3> <p>Disable default <code>enum</code> serialization by defining the macro <a href=../../api/macros/json_disable_enum_serialization/ ><code>JSON_DISABLE_ENUM_SERIALIZATION</code></a>. This option is <code>OFF</code> by default.</p> <h3 id=json_fasttests><code>JSON_FastTests</code><a class=headerlink href=#json_fasttests title="Permanent link">¶</a></h3> <p>Skip expensive/slow test suites. This option is <code>OFF</code> by default. Depends on <code>JSON_BuildTests</code>.</p> <h3 id=json_globaludls><code>JSON_GlobalUDLs</code><a class=headerlink href=#json_globaludls title="Permanent link">¶</a></h3> <p>Place user-defined string literals in the global namespace by defining the macro <a href=../../api/macros/json_use_global_udls/ ><code>JSON_USE_GLOBAL_UDLS</code></a>. This option is <code>OFF</code> by default.</p> <h3 id=json_implicitconversions><code>JSON_ImplicitConversions</code><a class=headerlink href=#json_implicitconversions title="Permanent link">¶</a></h3> <p>Enable implicit conversions by defining macro <a href=../../api/macros/json_use_implicit_conversions/ ><code>JSON_USE_IMPLICIT_CONVERSIONS</code></a>. This option is <code>ON</code> by default.</p> <h3 id=json_install><code>JSON_Install</code><a class=headerlink href=#json_install title="Permanent link">¶</a></h3> <p>Install CMake targets during install step. This option is <code>ON</code> by default if the library's CMake project is the top project.</p> <h3 id=json_legacydiscardedvaluecomparison><code>JSON_LegacyDiscardedValueComparison</code><a class=headerlink href=#json_legacydiscardedvaluecomparison title="Permanent link">¶</a></h3> <p>Enable the (incorrect) legacy comparison behavior of discarded <abbr title="JavaScript Object Notation">JSON</abbr> values by defining macro <a href=../../api/macros/json_use_legacy_discarded_value_comparison/ ><code>JSON_USE_LEGACY_DISCARDED_VALUE_COMPARISON</code></a>. This option is <code>OFF</code> by default.</p> <h3 id=json_multipleheaders><code>JSON_MultipleHeaders</code><a class=headerlink href=#json_multipleheaders title="Permanent link">¶</a></h3> <p>Use the non-amalgamated version of the library. This option is <code>ON</code> by default.</p> <h3 id=json_systeminclude><code>JSON_SystemInclude</code><a class=headerlink href=#json_systeminclude title="Permanent link">¶</a></h3> <p>Treat the library headers like system headers (i.e., adding <code>SYSTEM</code> to the <a href="https://cmake.org/cmake/help/latest/command/target_include_directories.html"><code>target_include_directories</code></a> call) to check for this library by tools like Clang-Tidy. This option is <code>OFF</code> by default.</p> <h3 id=json_valgrind><code>JSON_Valgrind</code><a class=headerlink href=#json_valgrind title="Permanent link">¶</a></h3> <p>Execute the test suite with <a href="https://valgrind.org">Valgrind</a>. This option is <code>OFF</code> by default. Depends on <code>JSON_BuildTests</code>.</p> <h3 id=nlohmann_json_build_modules><code>NLOHMANN_JSON_BUILD_MODULES</code><a class=headerlink href=#nlohmann_json_build_modules title="Permanent link">¶</a></h3> <p>Build the experimental <a href=../../features/modules/ >C++ module</a> <code>nlohmann.json</code> (requires CMake 3.28 or later and C++20). This option is <code>OFF</code> by default.</p> <p>A consuming project must link the dedicated <code>nlohmann_json_modules</code> CMake target (not just <code>nlohmann_json::nlohmann_json</code>) for <code>import nlohmann.json;</code> to resolve:</p> <div class=highlight><pre><span></span><code><span class=nb>set</span><span class=p>(</span><span class=s>NLOHMANN_JSON_BUILD_MODULES</span><span class=w> </span><span class=s>ON</span><span class=p>)</span>
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<span class=nb>add_subdirectory</span><span class=p>(</span><span class=s>path/to/json</span><span class=p>)</span>
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<span class=nb>add_executable</span><span class=p>(</span><span class=s>myproject</span><span class=w> </span><span class=s>main.cpp</span><span class=p>)</span>
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<span class=nb>target_link_libraries</span><span class=p>(</span><span class=s>myproject</span><span class=w> </span><span class=s>PRIVATE</span><span class=w> </span><span class=s>nlohmann_json_modules</span><span class=p>)</span>
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<span class=nb>target_compile_definitions</span><span class=p>(</span><span class=s>myproject</span><span class=w> </span><span class=s>PRIVATE</span><span class=w> </span><span class=s>NLOHMANN_JSON_BUILD_MODULES</span><span class=p>)</span>
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</code></pre></div> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="August 7, 2026 17:29:58 UTC">August 7, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - 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</code></pre></div> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="August 19, 2026 18:19:47 UTC">August 19, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - 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|
||||
@@ -2,4 +2,4 @@
|
||||
|
||||
<span class=c1>// for convenience</span>
|
||||
<span class=k>using</span><span class=w> </span><span class=n>json</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=n>nlohmann</span><span class=o>::</span><span class=n>json</span><span class=p>;</span>
|
||||
</code></pre></div> <p>to the files you want to process <abbr title="JavaScript Object Notation">JSON</abbr> and set the necessary switches to enable C++11 (e.g., <code>-std=c++11</code> for <abbr title="GNU Compiler Collection">GCC</abbr> and Clang).</p> <p>You can further use file <a href="https://github.com/nlohmann/json/blob/develop/single_include/nlohmann/json_fwd.hpp"><code>single_include/nlohmann/json_fwd.hpp</code></a> for forward declarations.</p> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="August 7, 2026 17:29:58 UTC">August 7, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - 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|
||||
</code></pre></div> <p>to the files you want to process <abbr title="JavaScript Object Notation">JSON</abbr> and set the necessary switches to enable C++11 (e.g., <code>-std=c++11</code> for <abbr title="GNU Compiler Collection">GCC</abbr> and Clang).</p> <p>You can further use file <a href="https://github.com/nlohmann/json/blob/develop/single_include/nlohmann/json_fwd.hpp"><code>single_include/nlohmann/json_fwd.hpp</code></a> for forward declarations.</p> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="August 19, 2026 18:19:47 UTC">August 19, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path d="M173.9 397.4c0 2-2.3 3.6-5.2 3.6-3.3.3-5.6-1.3-5.6-3.6 0-2 2.3-3.6 5.2-3.6 3-.3 5.6 1.3 5.6 3.6m-31.1-4.5c-.7 2 1.3 4.3 4.3 4.9 2.6 1 5.6 0 6.2-2s-1.3-4.3-4.3-5.2c-2.6-.7-5.5.3-6.2 2.3m44.2-1.7c-2.9.7-4.9 2.6-4.6 4.9.3 2 2.9 3.3 5.9 2.6 2.9-.7 4.9-2.6 4.6-4.6-.3-1.9-3-3.2-5.9-2.9M252.8 8C114.1 8 8 113.3 8 252c0 110.9 69.8 205.8 169.5 239.2 12.8 2.3 17.3-5.6 17.3-12.1 0-6.2-.3-40.4-.3-61.4 0 0-70 15-84.7-29.8 0 0-11.4-29.1-27.8-36.6 0 0-22.9-15.7 1.6-15.4 0 0 24.9 2 38.6 25.8 21.9 38.6 58.6 27.5 72.9 20.9 2.3-16 8.8-27.1 16-33.7-55.9-6.2-112.3-14.3-112.3-110.5 0-27.5 7.6-41.3 23.6-58.9-2.6-6.5-11.1-33.3 2.6-67.9 20.9-6.5 69 27 69 27 20-5.6 41.5-8.5 62.8-8.5s42.8 2.9 62.8 8.5c0 0 48.1-33.6 69-27 13.7 34.7 5.2 61.4 2.6 67.9 16 17.7 25.8 31.5 25.8 58.9 0 96.5-58.9 104.2-114.8 110.5 9.2 7.9 17 22.9 17 46.4 0 33.7-.3 75.4-.3 83.6 0 6.5 4.6 14.4 17.3 12.1C436.2 457.8 504 362.9 504 252 504 113.3 391.5 8 252.8 8M105.2 352.9c-1.3 1-1 3.3.7 5.2 1.6 1.6 3.9 2.3 5.2 1 1.3-1 1-3.3-.7-5.2-1.6-1.6-3.9-2.3-5.2-1m-10.8-8.1c-.7 1.3.3 2.9 2.3 3.9 1.6 1 3.6.7 4.3-.7.7-1.3-.3-2.9-2.3-3.9-2-.6-3.6-.3-4.3.7m32.4 35.6c-1.6 1.3-1 4.3 1.3 6.2 2.3 2.3 5.2 2.6 6.5 1 1.3-1.3.7-4.3-1.3-6.2-2.2-2.3-5.2-2.6-6.5-1m-11.4-14.7c-1.6 1-1.6 3.6 0 5.9s4.3 3.3 5.6 2.3c1.6-1.3 1.6-3.9 0-6.2-1.4-2.3-4-3.3-5.6-2"/></svg> </a> <a href="https://www.linkedin.com/in/nielslohmann/" target="_blank" rel="noopener" title="www.linkedin.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 448 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path d="M416 32H31.9C14.3 32 0 46.5 0 64.3v383.4C0 465.5 14.3 480 31.9 480H416c17.6 0 32-14.5 32-32.3V64.3c0-17.8-14.4-32.3-32-32.3M135.4 416H69V202.2h66.5V416zM102.2 96a38.5 38.5 0 1 1 0 77 38.5 38.5 0 1 1 0-77m282.1 320h-66.4V312c0-24.8-.5-56.7-34.5-56.7-34.6 0-39.9 27-39.9 54.9V416h-66.4V202.2h63.7v29.2h.9c8.9-16.8 30.6-34.5 62.9-34.5 67.2 0 79.7 44.3 79.7 101.9z"/></svg> </a> <a href="https://www.xing.com/profile/Niels_Lohmann" target="_blank" rel="noopener" title="www.xing.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 384 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https:/Line truncated
|
||||
@@ -1,57 +1,57 @@
|
||||
<!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=author content="Niels Lohmann"><link href="https://json.nlohmann.me/integration/migration_guide/" rel="canonical"><link href=../ rel=prev><link href=../cmake/ rel=next><link rel=icon href=../../assets/images/favicon.png><meta name=generator content="mkdocs-1.6.1, mkdocs-material-9.7.7"><title>Migration Guide - JSON for Modern C++</title><link rel=stylesheet href=../../assets/stylesheets/main.ec1eaa64.min.css><link rel=stylesheet href=../../assets/stylesheets/palette.ab4e12ef.min.css><link rel="stylesheet" href="../../assets/external/fonts.googleapis.com/css.61a430c9.css"><style>:root{--md-text-font:"Roboto";--md-code-font:"JetBrains Mono"}</style><link rel=stylesheet href=../../css/custom.css><script>__md_scope=new 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xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M12 8a3 3 0 0 0 3-3 3 3 0 0 0-3-3 3 3 0 0 0-3 3 3 3 0 0 0 3 3m0 3.54C9.64 9.35 6.5 8 3 8v11c3.5 0 6.64 1.35 9 3.54 2.36-2.19 5.5-3.54 9-3.54V8c-3.5 0-6.64 1.35-9 3.54"/></svg> </a> <label class="md-header__button md-icon" for=__drawer> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M3 6h18v2H3zm0 5h18v2H3zm0 5h18v2H3z"/></svg> </label> <div class=md-header__title data-md-component=header-title> <div class=md-header__ellipsis> <div class=md-header__topic> <span class=md-ellipsis> JSON for Modern C++ </span> </div> <div class=md-header__topic data-md-component=header-topic> <span class=md-ellipsis> Migration Guide </span> </div> </div> </div> <form class=md-header__option data-md-component=palette> <input class=md-option data-md-color-media="(prefers-color-scheme: light)" data-md-color-scheme=default data-md-color-primary=indigo data-md-color-accent=indigo aria-label="Switch to dark mode" type=radio 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6.52 0 0 1 9.5 16 6.5 6.5 0 0 1 3 9.5 6.5 6.5 0 0 1 9.5 3m0 2C7 5 5 7 5 9.5S7 14 9.5 14 14 12 14 9.5 12 5 9.5 5"/></svg> </label> <div class=md-sLine truncated
|
||||
<span class=n>std</span><span class=o>::</span><span class=n>stringstream</span><span class=w> </span><span class=n>ss</span><span class=p>(</span><span class=s>"[1,2,3]"</span><span class=p>);</span>
|
||||
<span class=n>std</span><span class=o>::</span><span class=n>stringstream</span><span class=w> </span><span class=n>ss</span><span class=p>(</span><span class=s>"[1,2,3]"</span><span class=p>);</span>
|
||||
<span class=n>j</span><span class=w> </span><span class=o><<</span><span class=w> </span><span class=n>ss</span><span class=p>;</span>
|
||||
</code></pre></div> </div> <div class=tabbed-block> <div class=highlight><pre><span></span><code><span class=n>nlohmann</span><span class=o>::</span><span class=n>json</span><span class=w> </span><span class=n>j</span><span class=p>;</span>
|
||||
<span class=n>std</span><span class=o>::</span><span class=n>stringstream</span><span class=w> </span><span class=n>ss</span><span class=p>(</span><span class=s>"[1,2,3]"</span><span class=p>);</span>
|
||||
<span class=n>std</span><span class=o>::</span><span class=n>stringstream</span><span class=w> </span><span class=n>ss</span><span class=p>(</span><span class=s>"[1,2,3]"</span><span class=p>);</span>
|
||||
<span class=n>ss</span><span class=w> </span><span class=o>>></span><span class=w> </span><span class=n>j</span><span class=p>;</span>
|
||||
</code></pre></div> </div> </div> </div> </li> <li> <p>Passing iterator pairs or pointer/length pairs to parsing functions (<a href=../../api/basic_json/parse/ ><code>parse</code></a>, <a href=../../api/basic_json/accept/ ><code>accept</code></a>, <a href=../../api/basic_json/sax_parse/ ><code>sax_parse</code></a>, <a href=../../api/basic_json/from_cbor/ ><code>from_cbor</code></a>, <a href=../../api/basic_json/from_msgpack/ ><code>from_msgpack</code></a>, <a href=../../api/basic_json/from_ubjson/ ><code>from_ubjson</code></a>, and <a href=../../api/basic_json/from_bson/ ><code>from_bson</code></a> via initializer lists is deprecated since 3.8.0. Instead, pass two iterators; for instance, call <code>from_cbor(ptr, ptr+len)</code> instead of <code>from_cbor({ptr, len})</code>.</p> <div class="tabbed-set tabbed-alternate" data-tabs=2:2><input checked=checked id=__tabbed_2_1 name=__tabbed_2 type=radio><input id=__tabbed_2_2 name=__tabbed_2 type=radio><div class=tabbed-labels><label for=__tabbed_2_1>Deprecated</label><label for=__tabbed_2_2>Future-proof</label></div> <div class=tabbed-content> <div class=tabbed-block> <div class=highlight><pre><span></span><code><span class=k>const</span><span class=w> </span><span class=kt>char</span><span class=o>*</span><span class=w> </span><span class=n>s</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=s>"[1,2,3]"</span><span class=p>;</span>
|
||||
</code></pre></div> </div> </div> </div> </li> <li> <p>Passing iterator pairs or pointer/length pairs to parsing functions (<a href=../../api/basic_json/parse/ ><code>parse</code></a>, <a href=../../api/basic_json/accept/ ><code>accept</code></a>, <a href=../../api/basic_json/sax_parse/ ><code>sax_parse</code></a>, <a href=../../api/basic_json/from_cbor/ ><code>from_cbor</code></a>, <a href=../../api/basic_json/from_msgpack/ ><code>from_msgpack</code></a>, <a href=../../api/basic_json/from_ubjson/ ><code>from_ubjson</code></a>, and <a href=../../api/basic_json/from_bson/ ><code>from_bson</code></a> via initializer lists is deprecated since 3.8.0. Instead, pass two iterators; for instance, call <code>from_cbor(ptr, ptr+len)</code> instead of <code>from_cbor({ptr, len})</code>.</p> <div class="tabbed-set tabbed-alternate" data-tabs=2:2><input checked=checked id=__tabbed_2_1 name=__tabbed_2 type=radio><input id=__tabbed_2_2 name=__tabbed_2 type=radio><div class=tabbed-labels><label for=__tabbed_2_1>Deprecated</label><label for=__tabbed_2_2>Future-proof</label></div> <div class=tabbed-content> <div class=tabbed-block> <div class=highlight><pre><span></span><code><span class=k>const</span><span class=w> </span><span class=kt>char</span><span class=o>*</span><span class=w> </span><span class=n>s</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=s>"[1,2,3]"</span><span class=p>;</span>
|
||||
<span class=kt>bool</span><span class=w> </span><span class=n>ok</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=n>nlohmann</span><span class=o>::</span><span class=n>json</span><span class=o>::</span><span class=n>accept</span><span class=p>({</span><span class=n>s</span><span class=p>,</span><span class=w> </span><span class=n>s</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>strlen</span><span class=p>(</span><span class=n>s</span><span class=p>)});</span>
|
||||
</code></pre></div> </div> <div class=tabbed-block> <div class=highlight><pre><span></span><code><span class=k>const</span><span class=w> </span><span class=kt>char</span><span class=o>*</span><span class=w> </span><span class=n>s</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=s>"[1,2,3]"</span><span class=p>;</span>
|
||||
</code></pre></div> </div> <div class=tabbed-block> <div class=highlight><pre><span></span><code><span class=k>const</span><span class=w> </span><span class=kt>char</span><span class=o>*</span><span class=w> </span><span class=n>s</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=s>"[1,2,3]"</span><span class=p>;</span>
|
||||
<span class=kt>bool</span><span class=w> </span><span class=n>ok</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=n>nlohmann</span><span class=o>::</span><span class=n>json</span><span class=o>::</span><span class=n>accept</span><span class=p>(</span><span class=n>s</span><span class=p>,</span><span class=w> </span><span class=n>s</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>strlen</span><span class=p>(</span><span class=n>s</span><span class=p>));</span>
|
||||
</code></pre></div> </div> </div> </div> </li> </ul> <h4 id=json-pointers><abbr title="JavaScript Object Notation">JSON</abbr> Pointers<a class=headerlink href=#json-pointers title="Permanent link">¶</a></h4> <ul> <li> <p>Comparing <abbr title="JavaScript Object Notation">JSON</abbr> Pointers with strings via <a href=../../api/json_pointer/operator_eq/ ><code>operator==</code></a> and <a href=../../api/json_pointer/operator_ne/ ><code>operator!=</code></a> is deprecated since 3.11.2. To compare a <a href=../../api/json_pointer/ ><code>json_pointer</code></a> <code>p</code> with a string <code>s</code>, convert <code>s</code> to a <code>json_pointer</code> first and use <a href=../../api/json_pointer/operator_eq/ ><code>json_pointer::operator==</code></a> or <a href=../../api/json_pointer/operator_ne/ ><code>json_pointer::operator!=</code></a>.</p> <div class="tabbed-set tabbed-alternate" data-tabs=3:2><input checked=checked id=__tabbed_3_1 name=__tabbed_3 type=radio><input id=__tabbed_3_2 name=__tabbed_3 type=radio><div class=tabbed-labels><label for=__tabbed_3_1>Deprecated</label><label for=__tabbed_3_2>Future-proof</label></div> <div class=tabbed-content> <div class=tabbed-block> <div class=highlight><pre><span></span><code><span class=n>nlohmann</span><span class=o>::</span><span class=n>json</span><span class=o>::</span><span class=n>json_pointer</span><span class=w> </span><span class=n>lhs</span><span class=p>(</span><span class=s>"/foo/bar/1"</span><span class=p>);</span>
|
||||
<span class=n>assert</span><span class=p>(</span><span class=n>lhs</span><span class=w> </span><span class=o>==</span><span class=w> </span><span class=s>"/foo/bar/1"</span><span class=p>);</span>
|
||||
</code></pre></div> </div> <div class=tabbed-block> <div class=highlight><pre><span></span><code><span class=n>nlohmann</span><span class=o>::</span><span class=n>json</span><span class=o>::</span><span class=n>json_pointer</span><span class=w> </span><span class=n>lhs</span><span class=p>(</span><span class=s>"/foo/bar/1"</span><span class=p>);</span>
|
||||
<span class=n>assert</span><span class=p>(</span><span class=n>lhs</span><span class=w> </span><span class=o>==</span><span class=w> </span><span class=n>nlohmann</span><span class=o>::</span><span class=n>json</span><span class=o>::</span><span class=n>json_pointer</span><span class=p>(</span><span class=s>"/foo/bar/1"</span><span class=p>));</span>
|
||||
</code></pre></div> </div> </div> </div> </li> <li> <p>The implicit conversion from <abbr title="JavaScript Object Notation">JSON</abbr> Pointers to string (<a href=../../api/json_pointer/operator_string_t/ ><code>json_pointer::operator string_t</code></a>) is deprecated since 3.11.0. Use <a href=../../api/json_pointer/to_string/ ><code>json_pointer::to_string</code></a> instead.</p> <div class="tabbed-set tabbed-alternate" data-tabs=4:2><input checked=checked id=__tabbed_4_1 name=__tabbed_4 type=radio><input id=__tabbed_4_2 name=__tabbed_4 type=radio><div class=tabbed-labels><label for=__tabbed_4_1>Deprecated</label><label for=__tabbed_4_2>Future-proof</label></div> <div class=tabbed-content> <div class=tabbed-block> <div class=highlight><pre><span></span><code><span class=n>nlohmann</span><span class=o>::</span><span class=n>json</span><span class=o>::</span><span class=n>json_pointer</span><span class=w> </span><span class=n>ptr</span><span class=p>(</span><span class=s>"/foo/bar/1"</span><span class=p>);</span>
|
||||
</code></pre></div> </div> </div> </div> </li> </ul> <h4 id=json-pointers><abbr title="JavaScript Object Notation">JSON</abbr> Pointers<a class=headerlink href=#json-pointers title="Permanent link">¶</a></h4> <ul> <li> <p>Comparing <abbr title="JavaScript Object Notation">JSON</abbr> Pointers with strings via <a href=../../api/json_pointer/operator_eq/ ><code>operator==</code></a> and <a href=../../api/json_pointer/operator_ne/ ><code>operator!=</code></a> is deprecated since 3.11.2. To compare a <a href=../../api/json_pointer/ ><code>json_pointer</code></a> <code>p</code> with a string <code>s</code>, convert <code>s</code> to a <code>json_pointer</code> first and use <a href=../../api/json_pointer/operator_eq/ ><code>json_pointer::operator==</code></a> or <a href=../../api/json_pointer/operator_ne/ ><code>json_pointer::operator!=</code></a>.</p> <div class="tabbed-set tabbed-alternate" data-tabs=3:2><input checked=checked id=__tabbed_3_1 name=__tabbed_3 type=radio><input id=__tabbed_3_2 name=__tabbed_3 type=radio><div class=tabbed-labels><label for=__tabbed_3_1>Deprecated</label><label for=__tabbed_3_2>Future-proof</label></div> <div class=tabbed-content> <div class=tabbed-block> <div class=highlight><pre><span></span><code><span class=n>nlohmann</span><span class=o>::</span><span class=n>json</span><span class=o>::</span><span class=n>json_pointer</span><span class=w> </span><span class=n>lhs</span><span class=p>(</span><span class=s>"/foo/bar/1"</span><span class=p>);</span>
|
||||
<span class=n>assert</span><span class=p>(</span><span class=n>lhs</span><span class=w> </span><span class=o>==</span><span class=w> </span><span class=s>"/foo/bar/1"</span><span class=p>);</span>
|
||||
</code></pre></div> </div> <div class=tabbed-block> <div class=highlight><pre><span></span><code><span class=n>nlohmann</span><span class=o>::</span><span class=n>json</span><span class=o>::</span><span class=n>json_pointer</span><span class=w> </span><span class=n>lhs</span><span class=p>(</span><span class=s>"/foo/bar/1"</span><span class=p>);</span>
|
||||
<span class=n>assert</span><span class=p>(</span><span class=n>lhs</span><span class=w> </span><span class=o>==</span><span class=w> </span><span class=n>nlohmann</span><span class=o>::</span><span class=n>json</span><span class=o>::</span><span class=n>json_pointer</span><span class=p>(</span><span class=s>"/foo/bar/1"</span><span class=p>));</span>
|
||||
</code></pre></div> </div> </div> </div> </li> <li> <p>The implicit conversion from <abbr title="JavaScript Object Notation">JSON</abbr> Pointers to string (<a href=../../api/json_pointer/operator_string_t/ ><code>json_pointer::operator string_t</code></a>) is deprecated since 3.11.0. Use <a href=../../api/json_pointer/to_string/ ><code>json_pointer::to_string</code></a> instead.</p> <div class="tabbed-set tabbed-alternate" data-tabs=4:2><input checked=checked id=__tabbed_4_1 name=__tabbed_4 type=radio><input id=__tabbed_4_2 name=__tabbed_4 type=radio><div class=tabbed-labels><label for=__tabbed_4_1>Deprecated</label><label for=__tabbed_4_2>Future-proof</label></div> <div class=tabbed-content> <div class=tabbed-block> <div class=highlight><pre><span></span><code><span class=n>nlohmann</span><span class=o>::</span><span class=n>json</span><span class=o>::</span><span class=n>json_pointer</span><span class=w> </span><span class=n>ptr</span><span class=p>(</span><span class=s>"/foo/bar/1"</span><span class=p>);</span>
|
||||
<span class=n>std</span><span class=o>::</span><span class=n>string</span><span class=w> </span><span class=n>s</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=n>ptr</span><span class=p>;</span>
|
||||
</code></pre></div> </div> <div class=tabbed-block> <div class=highlight><pre><span></span><code><span class=n>nlohmann</span><span class=o>::</span><span class=n>json</span><span class=o>::</span><span class=n>json_pointer</span><span class=w> </span><span class=n>ptr</span><span class=p>(</span><span class=s>"/foo/bar/1"</span><span class=p>);</span>
|
||||
</code></pre></div> </div> <div class=tabbed-block> <div class=highlight><pre><span></span><code><span class=n>nlohmann</span><span class=o>::</span><span class=n>json</span><span class=o>::</span><span class=n>json_pointer</span><span class=w> </span><span class=n>ptr</span><span class=p>(</span><span class=s>"/foo/bar/1"</span><span class=p>);</span>
|
||||
<span class=n>std</span><span class=o>::</span><span class=n>string</span><span class=w> </span><span class=n>s</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=n>ptr</span><span class=p>.</span><span class=n>to_string</span><span class=p>();</span>
|
||||
</code></pre></div> </div> </div> </div> </li> <li> <p>Passing a <code>basic_json</code> specialization as template parameter <code>RefStringType</code> to <a href=../../api/json_pointer/ ><code>json_pointer</code></a> is deprecated since 3.11.0. The string type can now be directly provided.</p> <div class="tabbed-set tabbed-alternate" data-tabs=5:2><input checked=checked id=__tabbed_5_1 name=__tabbed_5 type=radio><input id=__tabbed_5_2 name=__tabbed_5 type=radio><div class=tabbed-labels><label for=__tabbed_5_1>Deprecated</label><label for=__tabbed_5_2>Future-proof</label></div> <div class=tabbed-content> <div class=tabbed-block> <div class=highlight><pre><span></span><code><span class=k>using</span><span class=w> </span><span class=n>my_json</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=n>nlohmann</span><span class=o>::</span><span class=n>basic_json</span><span class=o><</span><span class=n>std</span><span class=o>::</span><span class=n>map</span><span class=p>,</span><span class=w> </span><span class=n>std</span><span class=o>::</span><span class=n>vector</span><span class=p>,</span><span class=w> </span><span class=n>my_string_type</span><span class=o>></span><span class=p>;</span>
|
||||
<span class=n>nlohmann</span><span class=o>::</span><span class=n>json_pointer</span><span class=o><</span><span class=n>my_json</span><span class=o>></span><span class=w> </span><span class=n>ptr</span><span class=p>(</span><span class=s>"/foo/bar/1"</span><span class=p>);</span>
|
||||
</code></pre></div> </div> <div class=tabbed-block> <div class=highlight><pre><span></span><code><span class=n>nlohmann</span><span class=o>::</span><span class=n>json_pointer</span><span class=o><</span><span class=n>my_string_type</span><span class=o>></span><span class=w> </span><span class=n>ptr</span><span class=p>(</span><span class=s>"/foo/bar/1"</span><span class=p>);</span>
|
||||
<span class=n>nlohmann</span><span class=o>::</span><span class=n>json_pointer</span><span class=o><</span><span class=n>my_json</span><span class=o>></span><span class=w> </span><span class=n>ptr</span><span class=p>(</span><span class=s>"/foo/bar/1"</span><span class=p>);</span>
|
||||
</code></pre></div> </div> <div class=tabbed-block> <div class=highlight><pre><span></span><code><span class=n>nlohmann</span><span class=o>::</span><span class=n>json_pointer</span><span class=o><</span><span class=n>my_string_type</span><span class=o>></span><span class=w> </span><span class=n>ptr</span><span class=p>(</span><span class=s>"/foo/bar/1"</span><span class=p>);</span>
|
||||
</code></pre></div> </div> </div> </div> <p>Thereby, <code>nlohmann::my_json::json_pointer</code> is an alias for <code>nlohmann::json_pointer<my_string_type></code> and is always an alias to the <code>json_pointer</code> with the appropriate string type for all specializations of <code>basic_json</code>.</p> </li> </ul> <h4 id=miscellaneous-functions>Miscellaneous functions<a class=headerlink href=#miscellaneous-functions title="Permanent link">¶</a></h4> <ul> <li> <p>The function <code>iterator_wrapper</code> is deprecated since 3.1.0. Please use the member function <a href=../../api/basic_json/items/ ><code>items</code></a> instead.</p> <div class="tabbed-set tabbed-alternate" data-tabs=6:2><input checked=checked id=__tabbed_6_1 name=__tabbed_6 type=radio><input id=__tabbed_6_2 name=__tabbed_6 type=radio><div class=tabbed-labels><label for=__tabbed_6_1>Deprecated</label><label for=__tabbed_6_2>Future-proof</label></div> <div class=tabbed-content> <div class=tabbed-block> <div class=highlight><pre><span></span><code><span class=k>for</span><span class=w> </span><span class=p>(</span><span class=k>auto</span><span class=w> </span><span class=o>&</span><span class=n>x</span><span class=w> </span><span class=o>:</span><span class=w> </span><span class=n>nlohmann</span><span class=o>::</span><span class=n>json</span><span class=o>::</span><span class=n>iterator_wrapper</span><span class=p>(</span><span class=n>j</span><span class=p>))</span>
|
||||
<span class=p>{</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>x</span><span class=p>.</span><span class=n>key</span><span class=p>()</span><span class=w> </span><span class=o><<</span><span class=w> </span><span class=s>":"</span><span class=w> </span><span class=o><<</span><span class=w> </span><span class=n>x</span><span class=p>.</span><span class=n>value</span><span class=p>()</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>endl</span><span class=p>;</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>x</span><span class=p>.</span><span class=n>key</span><span class=p>()</span><span class=w> </span><span class=o><<</span><span class=w> </span><span class=s>":"</span><span class=w> </span><span class=o><<</span><span class=w> </span><span class=n>x</span><span class=p>.</span><span class=n>value</span><span class=p>()</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>endl</span><span class=p>;</span>
|
||||
<span class=p>}</span>
|
||||
</code></pre></div> </div> <div class=tabbed-block> <div class=highlight><pre><span></span><code><span class=k>for</span><span class=w> </span><span class=p>(</span><span class=k>auto</span><span class=w> </span><span class=o>&</span><span class=n>x</span><span class=w> </span><span class=o>:</span><span class=w> </span><span class=n>j</span><span class=p>.</span><span class=n>items</span><span class=p>())</span>
|
||||
<span class=p>{</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>x</span><span class=p>.</span><span class=n>key</span><span class=p>()</span><span class=w> </span><span class=o><<</span><span class=w> </span><span class=s>":"</span><span class=w> </span><span class=o><<</span><span class=w> </span><span class=n>x</span><span class=p>.</span><span class=n>value</span><span class=p>()</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>endl</span><span class=p>;</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>x</span><span class=p>.</span><span class=n>key</span><span class=p>()</span><span class=w> </span><span class=o><<</span><span class=w> </span><span class=s>":"</span><span class=w> </span><span class=o><<</span><span class=w> </span><span class=n>x</span><span class=p>.</span><span class=n>value</span><span class=p>()</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>endl</span><span class=p>;</span>
|
||||
<span class=p>}</span>
|
||||
</code></pre></div> </div> </div> </div> </li> <li> <p>Function <code>friend std::ostream& operator>>(const basic_json&, std::ostream&)</code> is deprecated since 3.0.0. Please use <a href=../../api/operator_ltlt/ ><code>friend operator<<(std::ostream&, const basic_json&)</code></a> instead.</p> <div class="tabbed-set tabbed-alternate" data-tabs=7:2><input checked=checked id=__tabbed_7_1 name=__tabbed_7 type=radio><input id=__tabbed_7_2 name=__tabbed_7 type=radio><div class=tabbed-labels><label for=__tabbed_7_1>Deprecated</label><label for=__tabbed_7_2>Future-proof</label></div> <div class=tabbed-content> <div class=tabbed-block> <div class=highlight><pre><span></span><code><span class=n>j</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>cout</span><span class=p>;</span>
|
||||
</code></pre></div> </div> <div class=tabbed-block> <div class=highlight><pre><span></span><code><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>j</span><span class=p>;</span>
|
||||
</code></pre></div> </div> </div> </div> </li> <li> <p>The legacy comparison behavior for discarded values is deprecated since 3.11.0. It is already disabled by default and can still be enabled by defining <a href=../../api/macros/json_use_legacy_discarded_value_comparison/ ><code>JSON_USE_LEGACY_DISCARDED_VALUE_COMPARISON</code></a> to <code>1</code>.</p> <div class="tabbed-set tabbed-alternate" data-tabs=8:2><input checked=checked id=__tabbed_8_1 name=__tabbed_8 type=radio><input id=__tabbed_8_2 name=__tabbed_8 type=radio><div class=tabbed-labels><label for=__tabbed_8_1>Deprecated</label><label for=__tabbed_8_2>Future-proof</label></div> <div class=tabbed-content> <div class=tabbed-block> <div class=highlight><pre><span></span><code><span class=cp>#define JSON_USE_LEGACY_DISCARDED_VALUE_COMPARISON 1</span>
|
||||
<span class=cp>#include</span><span class=w> </span><span class=cpf><nlohmann/json.hpp></span>
|
||||
</code></pre></div> </div> <div class=tabbed-block> <div class=highlight><pre><span></span><code><span class=cp>#include</span><span class=w> </span><span class=cpf><nlohmann/json.hpp></span>
|
||||
</code></pre></div> </div> </div> </div> </li> </ul> <h2 id=replace-implicit-conversions>Replace implicit conversions<a class=headerlink href=#replace-implicit-conversions title="Permanent link">¶</a></h2> <p>Implicit conversions via <a href=../../api/basic_json/operator_ValueType/ ><code>operator ValueType</code></a> will be switched off by default in the next major release of the library.</p> <p>You can prepare existing code by already defining <a href=../../api/macros/json_use_implicit_conversions/ ><code>JSON_USE_IMPLICIT_CONVERSIONS</code></a> to <code>0</code> and replace any implicit conversions with calls to <a href=../../api/basic_json/get/ ><code>get</code></a>, <a href=../../api/basic_json/get_to/ ><code>get_to</code></a>, <a href=../../api/basic_json/get_ref/ ><code>get_ref</code></a>, or <a href=../../api/basic_json/get_ptr/ ><code>get_ptr</code></a>.</p> <div class="tabbed-set tabbed-alternate" data-tabs=9:3><input checked=checked id=__tabbed_9_1 name=__tabbed_9 type=radio><input id=__tabbed_9_2 name=__tabbed_9 type=radio><input id=__tabbed_9_3 name=__tabbed_9 type=radio><div class=tabbed-labels><label for=__tabbed_9_1>Deprecated</label><label for=__tabbed_9_2>Future-proof</label><label for=__tabbed_9_3>Future-proof (alternative)</label></div> <div class=tabbed-content> <div class=tabbed-block> <div class=highlight><pre><span></span><code><span class=n>nlohmann</span><span class=o>::</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=s>"Hello, world!"</span><span class=p>;</span>
|
||||
</code></pre></div> </div> </div> </div> </li> </ul> <h2 id=replace-implicit-conversions>Replace implicit conversions<a class=headerlink href=#replace-implicit-conversions title="Permanent link">¶</a></h2> <p>Implicit conversions via <a href=../../api/basic_json/operator_ValueType/ ><code>operator ValueType</code></a> will be switched off by default in the next major release of the library.</p> <p>You can prepare existing code by already defining <a href=../../api/macros/json_use_implicit_conversions/ ><code>JSON_USE_IMPLICIT_CONVERSIONS</code></a> to <code>0</code> and replace any implicit conversions with calls to <a href=../../api/basic_json/get/ ><code>get</code></a>, <a href=../../api/basic_json/get_to/ ><code>get_to</code></a>, <a href=../../api/basic_json/get_ref/ ><code>get_ref</code></a>, or <a href=../../api/basic_json/get_ptr/ ><code>get_ptr</code></a>.</p> <div class="tabbed-set tabbed-alternate" data-tabs=9:3><input checked=checked id=__tabbed_9_1 name=__tabbed_9 type=radio><input id=__tabbed_9_2 name=__tabbed_9 type=radio><input id=__tabbed_9_3 name=__tabbed_9 type=radio><div class=tabbed-labels><label for=__tabbed_9_1>Deprecated</label><label for=__tabbed_9_2>Future-proof</label><label for=__tabbed_9_3>Future-proof (alternative)</label></div> <div class=tabbed-content> <div class=tabbed-block> <div class=highlight><pre><span></span><code><span class=n>nlohmann</span><span class=o>::</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=s>"Hello, world!"</span><span class=p>;</span>
|
||||
<span class=n>std</span><span class=o>::</span><span class=n>string</span><span class=w> </span><span class=n>s</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=n>j</span><span class=p>;</span>
|
||||
</code></pre></div> </div> <div class=tabbed-block> <div class=highlight><pre><span></span><code><span class=n>nlohmann</span><span class=o>::</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=s>"Hello, world!"</span><span class=p>;</span>
|
||||
</code></pre></div> </div> <div class=tabbed-block> <div class=highlight><pre><span></span><code><span class=n>nlohmann</span><span class=o>::</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=s>"Hello, world!"</span><span class=p>;</span>
|
||||
<span class=k>auto</span><span class=w> </span><span class=n>s</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=n>j</span><span class=p>.</span><span class=n>get</span><span class=o><</span><span class=n>std</span><span class=o>::</span><span class=n>string</span><span class=o>></span><span class=p>();</span>
|
||||
</code></pre></div> </div> <div class=tabbed-block> <div class=highlight><pre><span></span><code><span class=n>nlohmann</span><span class=o>::</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=s>"Hello, world!"</span><span class=p>;</span>
|
||||
</code></pre></div> </div> <div class=tabbed-block> <div class=highlight><pre><span></span><code><span class=n>nlohmann</span><span class=o>::</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=s>"Hello, world!"</span><span class=p>;</span>
|
||||
<span class=n>std</span><span class=o>::</span><span class=n>string</span><span class=w> </span><span class=n>s</span><span class=p>;</span>
|
||||
<span class=n>j</span><span class=p>.</span><span class=n>get_to</span><span class=p>(</span><span class=n>s</span><span class=p>);</span>
|
||||
</code></pre></div> </div> </div> </div> <h2 id=import-namespace-literals-for-udls>Import namespace <code>literals</code> for UDLs<a class=headerlink href=#import-namespace-literals-for-udls title="Permanent link">¶</a></h2> <p>The user-defined string literals <a href=../../api/operator_literal_json/ ><code>operator""_json</code></a> and <a href=../../api/operator_literal_json_pointer/ ><code>operator""_json_pointer</code></a> will be removed from the global namespace in the next major release of the library.</p> <div class="tabbed-set tabbed-alternate" data-tabs=10:2><input checked=checked id=__tabbed_10_1 name=__tabbed_10 type=radio><input id=__tabbed_10_2 name=__tabbed_10 type=radio><div class=tabbed-labels><label for=__tabbed_10_1>Deprecated</label><label for=__tabbed_10_2>Future-proof</label></div> <div class=tabbed-content> <div class=tabbed-block> <div class=highlight><pre><span></span><code><span class=n>nlohmann</span><span class=o>::</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=s>"[1,2,3]"</span><span class=n>_json</span><span class=p>;</span>
|
||||
</code></pre></div> </div> </div> </div> <h2 id=import-namespace-literals-for-udls>Import namespace <code>literals</code> for UDLs<a class=headerlink href=#import-namespace-literals-for-udls title="Permanent link">¶</a></h2> <p>The user-defined string literals <a href=../../api/operator_literal_json/ ><code>operator""_json</code></a> and <a href=../../api/operator_literal_json_pointer/ ><code>operator""_json_pointer</code></a> will be removed from the global namespace in the next major release of the library.</p> <div class="tabbed-set tabbed-alternate" data-tabs=10:2><input checked=checked id=__tabbed_10_1 name=__tabbed_10 type=radio><input id=__tabbed_10_2 name=__tabbed_10 type=radio><div class=tabbed-labels><label for=__tabbed_10_1>Deprecated</label><label for=__tabbed_10_2>Future-proof</label></div> <div class=tabbed-content> <div class=tabbed-block> <div class=highlight><pre><span></span><code><span class=n>nlohmann</span><span class=o>::</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=s>"[1,2,3]"</span><span class=n>_json</span><span class=p>;</span>
|
||||
</code></pre></div> </div> <div class=tabbed-block> <div class=highlight><pre><span></span><code><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>
|
||||
<span class=n>nlohmann</span><span class=o>::</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=s>"[1,2,3]"</span><span class=n>_json</span><span class=p>;</span>
|
||||
<span class=n>nlohmann</span><span class=o>::</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=s>"[1,2,3]"</span><span class=n>_json</span><span class=p>;</span>
|
||||
</code></pre></div> </div> </div> </div> <p>To prepare existing code, define <a href=../../api/macros/json_use_global_udls/ ><code>JSON_USE_GLOBAL_UDLS</code></a> to <code>0</code> and bring the string literals into scope where needed.</p> <h2 id=do-not-hard-code-the-complete-library-namespace>Do not hard-code the complete library namespace<a class=headerlink href=#do-not-hard-code-the-complete-library-namespace title="Permanent link">¶</a></h2> <p>The <a href=../../features/namespace/ ><code>nlohmann</code> namespace</a> contains a sub-namespace to avoid problems when different versions or configurations of the library are used in the same project. Always use <code>nlohmann</code> as namespace or, when the exact version and configuration is relevant, use macro <a href=../../api/macros/nlohmann_json_namespace/ ><code>NLOHMANN_JSON_NAMESPACE</code></a> to denote the namespace.</p> <div class="tabbed-set tabbed-alternate" data-tabs=11:3><input checked=checked id=__tabbed_11_1 name=__tabbed_11 type=radio><input id=__tabbed_11_2 name=__tabbed_11 type=radio><input id=__tabbed_11_3 name=__tabbed_11 type=radio><div class=tabbed-labels><label for=__tabbed_11_1>Dangerous</label><label for=__tabbed_11_2>Future-proof</label><label for=__tabbed_11_3>Future-proof (alternative)</label></div> <div class=tabbed-content> <div class=tabbed-block> <div class=highlight><pre><span></span><code><span class=kt>void</span><span class=w> </span><span class=nf>to_json</span><span class=p>(</span><span class=n>nlohmann</span><span class=o>::</span><span class=n>json_abi_v3_11_2</span><span class=o>::</span><span class=n>json</span><span class=o>&</span><span class=w> </span><span class=n>j</span><span class=p>,</span><span class=w> </span><span class=k>const</span><span class=w> </span><span class=n>person</span><span class=o>&</span><span class=w> </span><span class=n>p</span><span class=p>)</span>
|
||||
<span class=p>{</span>
|
||||
<span class=w> </span><span class=n>j</span><span class=p>[</span><span class=s>"age"</span><span class=p>]</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=n>p</span><span class=p>.</span><span class=n>age</span><span class=p>;</span>
|
||||
<span class=w> </span><span class=n>j</span><span class=p>[</span><span class=s>"age"</span><span class=p>]</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=n>p</span><span class=p>.</span><span class=n>age</span><span class=p>;</span>
|
||||
<span class=p>}</span>
|
||||
</code></pre></div> </div> <div class=tabbed-block> <div class=highlight><pre><span></span><code><span class=kt>void</span><span class=w> </span><span class=nf>to_json</span><span class=p>(</span><span class=n>nlohmann</span><span class=o>::</span><span class=n>json</span><span class=o>&</span><span class=w> </span><span class=n>j</span><span class=p>,</span><span class=w> </span><span class=k>const</span><span class=w> </span><span class=n>person</span><span class=o>&</span><span class=w> </span><span class=n>p</span><span class=p>)</span>
|
||||
<span class=p>{</span>
|
||||
<span class=w> </span><span class=n>j</span><span class=p>[</span><span class=s>"age"</span><span class=p>]</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=n>p</span><span class=p>.</span><span class=n>age</span><span class=p>;</span>
|
||||
<span class=w> </span><span class=n>j</span><span class=p>[</span><span class=s>"age"</span><span class=p>]</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=n>p</span><span class=p>.</span><span class=n>age</span><span class=p>;</span>
|
||||
<span class=p>}</span>
|
||||
</code></pre></div> </div> <div class=tabbed-block> <div class=highlight><pre><span></span><code><span class=kt>void</span><span class=w> </span><span class=nf>to_json</span><span class=p>(</span><span class=n>NLOHMANN_JSON_NAMESPACE</span><span class=o>::</span><span class=n>json</span><span class=o>&</span><span class=w> </span><span class=n>j</span><span class=p>,</span><span class=w> </span><span class=k>const</span><span class=w> </span><span class=n>person</span><span class=o>&</span><span class=w> </span><span class=n>p</span><span class=p>)</span>
|
||||
<span class=p>{</span>
|
||||
<span class=w> </span><span class=n>j</span><span class=p>[</span><span class=s>"age"</span><span class=p>]</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=n>p</span><span class=p>.</span><span class=n>age</span><span class=p>;</span>
|
||||
<span class=w> </span><span class=n>j</span><span class=p>[</span><span class=s>"age"</span><span class=p>]</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=n>p</span><span class=p>.</span><span class=n>age</span><span class=p>;</span>
|
||||
<span class=p>}</span>
|
||||
</code></pre></div> </div> </div> </div> <h2 id=do-not-use-the-details-namespace>Do not use the <code>details</code> namespace<a class=headerlink href=#do-not-use-the-details-namespace title="Permanent link">¶</a></h2> <p>The <code>details</code> namespace is not part of the public <abbr title="Application Programming Interfaces">API</abbr> of the library and can change in any version without an announcement. Do not rely on any function or type in the <code>details</code> namespace.</p> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="August 7, 2026 17:29:58 UTC">August 7, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path d="M173.9 397.4c0 2-2.3 3.6-5.2 3.6-3.3.3-5.6-1.3-5.6-3.6 0-2 2.3-3.6 5.2-3.6 3-.3 5.6 1.3 5.6 3.6m-31.1-4.5c-.7 2 1.3 4.3 4.3 4.9 2.6 1 5.6 0 6.2-2s-1.3-4.3-4.3-5.2c-2.6-.7-5.5.3-6.2 2.3m44.2-1.7c-2.9.7-4.9 2.6-4.6 4.9.3 2 2.9 3.3 5.9 2.6 2.9-.7 4.9-2.6 4.6-4.6-.3-1.9-3-3.2-5.9-2.9M252.8 8C114.1 8 8 113.3 8 252c0 110.9 69.8 205.8 169.5 239.2 12.8 2.3 17.3-5.6 17.3-12.1 0-6.2-.3-40.4-.3-61.4 0 0-70 15-84.7-29.8 0 0-11.4-29.1-27.8-36.6 0 0-22.9-15.7 1.6-15.4 0 0 24.9 2 38.6 25.8 21.9 38.6 58.6 27.5 72.9 20.9 2.3-16 8.8-27.1 16-33.7-55.9-6.2-112.3-14.3-112.3-110.5 0-27.5 7.6-41.3 23.6-58.9-2.6-6.5-11.1-33.3 2.6-67.9 20.9-6.5 69 27 69 27 20-5.6 41.5-8.5 62.8-8.5s42.8 2.9 62.8 8.5c0 0 48.1-33.6 69-27 13.7 34.7 5.2 61.4 2.6 67.9 16 17.7 25.8 31.5 25.8 58.9 0 96.5-58.9 104.2-114.8 110.5 9.2 7.9 17 22.9 17 46.4 0 33.7-.3 75.4-.3 83.6 0 6.5 4.6 14.4 17.3 12.1C436.2 457.8 504 362.9 504 252 504 113.3 391.5 8 252.8 8M105.2 352.9c-1.3 1-1 3.3.7 5.2 1.6 1.6 3.9 2.3 5.2 1 1.3-1 1-3.3-.7-5.2-1.6-1.6-3.9-2.3-5.2-1m-10.8-8.1c-.7 1.3.3 2.9 2.3 3.9 1.6 1 3.6.7 4.3-.7.7-1.3-.3-2.9-2.3-3.9-2-.6-3.6-.3-4.3.7m32.4 35.6c-1.6 1.3-1 4.3 1.3 6.2 2.3 2.3 5.2 2.6 6.5 1 1.3-1.3.7-4.3-1.3-6.2-2.2-2.3-5.2-2.6-6.5-1m-11.4-14.7c-1.6 1-1.6 3.6 0 5.9s4.3 3.3 5.6 2.3c1.6-1.3 1.6-3.9 0-6.2-1.4-2.3-4-3.3-5.6-2"/></svg> </a> <a href="https://www.linkedin.com/in/nielslohmann/" target="_blank" rel="noopener" title="www.linkedin.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 448 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path d="M416 32H31.9C14.3 32 0 46.5 0 64.3v383.4C0 465.5 14.3 480 31.9 480H416c17.6 0 32-14.5 32-32.3V64.3c0-17.8-14.4-32.3-32-32.3M135.4 416H69V202.2h66.5V416zM102.2 96a38.5 38.5 0 1 1 0 77 38.5 38.5 0 1 1 0-77m282.1 320h-66.4V312c0-24.8-.5-56.7-34.5-56.7-34.6 0-39.9 27-39.9 54.9V416h-66.4V202.2h63.7v29.2h.9c8.9-16.8 30.6-34.5 62.9-34.5 67.2 0 79.7 44.3 79.7 101.9z"/></svg> </a> <a href="https://www.xing.com/profile/Niels_Lohmann" target="_blank" rel="noopener" title="www.xing.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 384 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https:/Line truncated
|
||||
</code></pre></div> </div> </div> </div> <h2 id=do-not-use-the-details-namespace>Do not use the <code>details</code> namespace<a class=headerlink href=#do-not-use-the-details-namespace title="Permanent link">¶</a></h2> <p>The <code>details</code> namespace is not part of the public <abbr title="Application Programming Interfaces">API</abbr> of the library and can change in any version without an announcement. Do not rely on any function or type in the <code>details</code> namespace.</p> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="August 19, 2026 18:19:47 UTC">August 19, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path d="M173.9 397.4c0 2-2.3 3.6-5.2 3.6-3.3.3-5.6-1.3-5.6-3.6 0-2 2.3-3.6 5.2-3.6 3-.3 5.6 1.3 5.6 3.6m-31.1-4.5c-.7 2 1.3 4.3 4.3 4.9 2.6 1 5.6 0 6.2-2s-1.3-4.3-4.3-5.2c-2.6-.7-5.5.3-6.2 2.3m44.2-1.7c-2.9.7-4.9 2.6-4.6 4.9.3 2 2.9 3.3 5.9 2.6 2.9-.7 4.9-2.6 4.6-4.6-.3-1.9-3-3.2-5.9-2.9M252.8 8C114.1 8 8 113.3 8 252c0 110.9 69.8 205.8 169.5 239.2 12.8 2.3 17.3-5.6 17.3-12.1 0-6.2-.3-40.4-.3-61.4 0 0-70 15-84.7-29.8 0 0-11.4-29.1-27.8-36.6 0 0-22.9-15.7 1.6-15.4 0 0 24.9 2 38.6 25.8 21.9 38.6 58.6 27.5 72.9 20.9 2.3-16 8.8-27.1 16-33.7-55.9-6.2-112.3-14.3-112.3-110.5 0-27.5 7.6-41.3 23.6-58.9-2.6-6.5-11.1-33.3 2.6-67.9 20.9-6.5 69 27 69 27 20-5.6 41.5-8.5 62.8-8.5s42.8 2.9 62.8 8.5c0 0 48.1-33.6 69-27 13.7 34.7 5.2 61.4 2.6 67.9 16 17.7 25.8 31.5 25.8 58.9 0 96.5-58.9 104.2-114.8 110.5 9.2 7.9 17 22.9 17 46.4 0 33.7-.3 75.4-.3 83.6 0 6.5 4.6 14.4 17.3 12.1C436.2 457.8 504 362.9 504 252 504 113.3 391.5 8 252.8 8M105.2 352.9c-1.3 1-1 3.3.7 5.2 1.6 1.6 3.9 2.3 5.2 1 1.3-1 1-3.3-.7-5.2-1.6-1.6-3.9-2.3-5.2-1m-10.8-8.1c-.7 1.3.3 2.9 2.3 3.9 1.6 1 3.6.7 4.3-.7.7-1.3-.3-2.9-2.3-3.9-2-.6-3.6-.3-4.3.7m32.4 35.6c-1.6 1.3-1 4.3 1.3 6.2 2.3 2.3 5.2 2.6 6.5 1 1.3-1.3.7-4.3-1.3-6.2-2.2-2.3-5.2-2.6-6.5-1m-11.4-14.7c-1.6 1-1.6 3.6 0 5.9s4.3 3.3 5.6 2.3c1.6-1.3 1.6-3.9 0-6.2-1.4-2.3-4-3.3-5.6-2"/></svg> </a> <a href="https://www.linkedin.com/in/nielslohmann/" target="_blank" rel="noopener" title="www.linkedin.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 448 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path d="M416 32H31.9C14.3 32 0 46.5 0 64.3v383.4C0 465.5 14.3 480 31.9 480H416c17.6 0 32-14.5 32-32.3V64.3c0-17.8-14.4-32.3-32-32.3M135.4 416H69V202.2h66.5V416zM102.2 96a38.5 38.5 0 1 1 0 77 38.5 38.5 0 1 1 0-77m282.1 320h-66.4V312c0-24.8-.5-56.7-34.5-56.7-34.6 0-39.9 27-39.9 54.9V416h-66.4V202.2h63.7v29.2h.9c8.9-16.8 30.6-34.5 62.9-34.5 67.2 0 79.7 44.3 79.7 101.9z"/></svg> </a> <a href="https://www.xing.com/profile/Niels_Lohmann" target="_blank" rel="noopener" title="www.xing.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 384 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - httpsLine truncated
|
||||
@@ -9,20 +9,20 @@
|
||||
<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>4</span><span class=p>)</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>meta</span><span class=p>()</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>endl</span><span class=p>;</span>
|
||||
<span class=p>}</span>
|
||||
</code></pre></div> <p>When executed, this program should create output similar to</p> <div class=highlight><pre><span></span><code><span class=p>{</span>
|
||||
<span class=w> </span><span class=nt>"compiler"</span><span class=p>:</span><span class=w> </span><span class=p>{</span>
|
||||
<span class=w> </span><span class=nt>"c++"</span><span class=p>:</span><span class=w> </span><span class=s2>"201103"</span><span class=p>,</span>
|
||||
<span class=w> </span><span class=nt>"family"</span><span class=p>:</span><span class=w> </span><span class=s2>"gcc"</span><span class=p>,</span>
|
||||
<span class=w> </span><span class=nt>"version"</span><span class=p>:</span><span class=w> </span><span class=s2>"12.4.0"</span>
|
||||
<span class=w> </span><span class=nt>"compiler"</span><span class=p>:</span><span class=w> </span><span class=p>{</span>
|
||||
<span class=w> </span><span class=nt>"c++"</span><span class=p>:</span><span class=w> </span><span class=s2>"201103"</span><span class=p>,</span>
|
||||
<span class=w> </span><span class=nt>"family"</span><span class=p>:</span><span class=w> </span><span class=s2>"gcc"</span><span class=p>,</span>
|
||||
<span class=w> </span><span class=nt>"version"</span><span class=p>:</span><span class=w> </span><span class=s2>"12.4.0"</span>
|
||||
<span class=w> </span><span class=p>},</span>
|
||||
<span class=w> </span><span class=nt>"copyright"</span><span class=p>:</span><span class=w> </span><span class=s2>"(C) 2013-2026 Niels Lohmann"</span><span class=p>,</span>
|
||||
<span class=w> </span><span class=nt>"name"</span><span class=p>:</span><span class=w> </span><span class=s2>"JSON for Modern C++"</span><span class=p>,</span>
|
||||
<span class=w> </span><span class=nt>"platform"</span><span class=p>:</span><span class=w> </span><span class=s2>"apple"</span><span class=p>,</span>
|
||||
<span class=w> </span><span class=nt>"url"</span><span class=p>:</span><span class=w> </span><span class=s2>"https://github.com/nlohmann/json"</span><span class=p>,</span>
|
||||
<span class=w> </span><span class=nt>"version"</span><span class=p>:</span><span class=w> </span><span class=p>{</span>
|
||||
<span class=w> </span><span class=nt>"major"</span><span class=p>:</span><span class=w> </span><span class=mi>3</span><span class=p>,</span>
|
||||
<span class=w> </span><span class=nt>"minor"</span><span class=p>:</span><span class=w> </span><span class=mi>12</span><span class=p>,</span>
|
||||
<span class=w> </span><span class=nt>"patch"</span><span class=p>:</span><span class=w> </span><span class=mi>0</span><span class=p>,</span>
|
||||
<span class=w> </span><span class=nt>"string"</span><span class=p>:</span><span class=w> </span><span class=s2>"3.12.0"</span>
|
||||
<span class=w> </span><span class=nt>"copyright"</span><span class=p>:</span><span class=w> </span><span class=s2>"(C) 2013-2026 Niels Lohmann"</span><span class=p>,</span>
|
||||
<span class=w> </span><span class=nt>"name"</span><span class=p>:</span><span class=w> </span><span class=s2>"JSON for Modern C++"</span><span class=p>,</span>
|
||||
<span class=w> </span><span class=nt>"platform"</span><span class=p>:</span><span class=w> </span><span class=s2>"apple"</span><span class=p>,</span>
|
||||
<span class=w> </span><span class=nt>"url"</span><span class=p>:</span><span class=w> </span><span class=s2>"https://github.com/nlohmann/json"</span><span class=p>,</span>
|
||||
<span class=w> </span><span class=nt>"version"</span><span class=p>:</span><span class=w> </span><span class=p>{</span>
|
||||
<span class=w> </span><span class=nt>"major"</span><span class=p>:</span><span class=w> </span><span class=mi>3</span><span class=p>,</span>
|
||||
<span class=w> </span><span class=nt>"minor"</span><span class=p>:</span><span class=w> </span><span class=mi>12</span><span class=p>,</span>
|
||||
<span class=w> </span><span class=nt>"patch"</span><span class=p>:</span><span class=w> </span><span class=mi>0</span><span class=p>,</span>
|
||||
<span class=w> </span><span class=nt>"string"</span><span class=p>:</span><span class=w> </span><span class=s2>"3.12.0"</span>
|
||||
<span class=w> </span><span class=p>}</span>
|
||||
<span class=p>}</span>
|
||||
</code></pre></div> <h2 id=homebrew>Homebrew<a class=headerlink href=#homebrew title="Permanent link">¶</a></h2> <div class="admonition abstract"> <p class=admonition-title>Summary</p> <p>formula: <a href="https://formulae.brew.sh/formula/nlohmann-json"><strong><code>nlohmann-json</code></strong></a></p> <ul> <li><a href="https://repology.org/project/nlohmann-json/versions"><img alt="Homebrew package" src="../../assets/external/repology.org/badge/version-for-repo/homebrew/nlohmann-json.svg"></a></li> <li><span class=twemoji><svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M7.75 6.5a1.25 1.25 0 1 0 0 2.5 1.25 1.25 0 0 0 0-2.5"/><path d="M2.5 1h8.44a1.5 1.5 0 0 1 1.06.44l10.25 10.25a1.5 1.5 0 0 1 0 2.12l-8.44 8.44a1.5 1.5 0 0 1-2.12 0L1.44 12A1.5 1.5 0 0 1 1 10.94V2.5A1.5 1.5 0 0 1 2.5 1m0 1.5v8.44l10.25 10.25 8.44-8.44L10.94 2.5Z"/></svg></span> Available versions: current version and development version (with <code>--HEAD</code> parameter)</li> <li><span class=twemoji><svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M20.322.75h1.176a1.75 1.75 0 0 1 1.75 1.749v1.177a10.75 10.75 0 0 1-2.925 7.374l-1.228 1.304a24 24 0 0 1-1.596 1.542v5.038c0 .615-.323 1.184-.85 1.5l-4.514 2.709a.75.75 0 0 1-1.12-.488l-.963-4.572a1.3 1.3 0 0 1-.14-.129L8.04 15.96l-1.994-1.873a1.3 1.3 0 0 1-.129-.14l-4.571-.963a.75.75 0 0 1-.49-1.12l2.71-4.514c.316-.527.885-.85 1.5-.85h5.037a24 24 0 0 1 1.542-1.594l1.304-1.23A10.75 10.75 0 0 1 20.321.75Zm-6.344 4.018v-.001l-1.304 1.23a22.3 22.3 0 0 0-3.255 3.851l-2.193 3.29 1.859 1.744.034.034 1.743 1.858 3.288-2.192a22.3 22.3 0 0 0 3.854-3.257l1.228-1.303a9.25 9.25 0 0 0 2.517-6.346V2.5a.25.25 0 0 0-.25-.25h-1.177a9.25 9.25 0 0 0-6.344 2.518M6.5 21c-1.209 1.209-3.901 1.445-4.743 1.49a.24.24 0 0 1-.18-.067.24.24 0 0 1-.067-.18c.045-.842.281-3.534 1.49-4.743.9-.9 2.6-.9 3.5 0s.9 2.6 0 3.5m-.592-8.588L8.17 9.017q.346-.519.717-1.017H5.066a.25.25 0 0 0-.214.121l-2.167 3.612ZM16 15.112q-.5.372-1.018.718l-3.393 2.262.678 3.223 3.612-2.167a.25.25 0 0 0 .121-.214ZM17.5 8a1.5 1.5 0 1 1-3.001-.001A1.5 1.5 0 0 1 17.5 8"/></svg></span> The formula is updated with every release.</li> <li><span class=twemoji><svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M12 2.5a5.5 5.5 0 0 1 3.096 10.047 9.005 9.005 0 0 1 5.9 8.181.75.75 0 1 1-1.499.044 7.5 7.5 0 0 0-14.993 0 .75.75 0 0 1-1.5-.045 9.005 9.005 0 0 1 5.9-8.18A5.5 5.5 0 0 1 12 2.5M8 8a4 4 0 1 0 8 0 4 4 0 0 0-8 0"/></svg></span> Maintainer: Niels Lohmann</li> <li><span class=twemoji><svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M3 3a2 2 0 0 1 2-2h9.982a2 2 0 0 1 1.414.586l4.018 4.018A2 2 0 0 1 21 7.018V21a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2Zm2-.5a.5.5 0 0 0-.5.5v18a.5.5 0 0 0 .5.5h14a.5.5 0 0 0 .5-.5V8.5h-4a2 2 0 0 1-2-2v-4Zm10 0v4a.5.5 0 0 0 .5.5h4a.5.5 0 0 0-.146-.336l-4.018-4.018A.5.5 0 0 0 15 2.5"/></svg></span> File issues at the <a href="https://github.com/Homebrew/homebrew-core/issues">Homebrew issue tracker</a></li> <li><span class=twemoji><svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M10.97 8.265a1.45 1.45 0 0 0-.487.57.75.75 0 0 1-1.341-.67c.2-.402.513-.826.997-1.148C10.627 6.69 11.244 6.5 12 6.5c.658 0 1.369.195 1.934.619a2.45 2.45 0 0 1 1.004 2.006c0 1.033-.513 1.72-1.027 2.215-.19.183-.399.358-.579.508l-.147.123a4 4 0 0 0-.435.409v1.37a.75.75 0 1 1-1.5 0v-1.473c0-.237.067-.504.247-.736.22-.28.486-.517.718-.714l.183-.153.001-.001c.172-.143.324-.27.47-.412.368-.355.569-.676.569-1.136a.95.95 0 0 0-.404-.806C12.766 8.118 12.384 8 12 8c-.494 0-.814.121-1.03.265M13 17a1 1 0 1 1-2 0 1 1 0 0 1 2 0"/><path d="M12 1c6.075 0 11 4.925 11 11s-4.925 11-11 11S1 18.075 1 12 5.925 1 12 1M2.5 12a9.5 9.5 0 0 0 9.5 9.5 9.5 9.5 0 0 0 9.5-9.5A9.5 9.5 0 0 0 12 2.5 9.5 9.5 0 0 0 2.5 12"/></svg></span> <a href="https://brew.sh">Homebrew website</a></li> </ul> </div> <p>If you are using <a href="http://brew.sh">Homebrew</a>, you can install the library with</p> <div class=highlight><pre><span></span><code>brew<span class=w> </span>install<span class=w> </span>nlohmann-json
|
||||
@@ -59,15 +59,15 @@
|
||||
</code></pre></div> </li> <li> <p>Compile the code and pass the Homebrew prefix to CMake to find installed packages via <code class=highlight><span class=err>find_package</span></code>:</p> <div class=highlight><pre><span></span><code><span class=nv>CMAKE_PREFIX_PATH</span><span class=o>=</span><span class=k>$(</span>brew<span class=w> </span>--prefix<span class=k>)</span><span class=w> </span>cmake<span class=w> </span>-S<span class=w> </span>.<span class=w> </span>-B<span class=w> </span>build
|
||||
cmake<span class=w> </span>--build<span class=w> </span>build
|
||||
</code></pre></div> </li> </ol> </details> <h2 id=meson>Meson<a class=headerlink href=#meson title="Permanent link">¶</a></h2> <div class="admonition abstract"> <p class=admonition-title>Summary</p> <p>wrap: <strong><code>nlohmann_json</code></strong></p> <ul> <li><span class=twemoji><svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M7.75 6.5a1.25 1.25 0 1 0 0 2.5 1.25 1.25 0 0 0 0-2.5"/><path d="M2.5 1h8.44a1.5 1.5 0 0 1 1.06.44l10.25 10.25a1.5 1.5 0 0 1 0 2.12l-8.44 8.44a1.5 1.5 0 0 1-2.12 0L1.44 12A1.5 1.5 0 0 1 1 10.94V2.5A1.5 1.5 0 0 1 2.5 1m0 1.5v8.44l10.25 10.25 8.44-8.44L10.94 2.5Z"/></svg></span> Available versions: current version and select older versions (see <a href="https://mesonbuild.com/Wrapdb-projects.html">WrapDB</a>)</li> <li><span class=twemoji><svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M20.322.75h1.176a1.75 1.75 0 0 1 1.75 1.749v1.177a10.75 10.75 0 0 1-2.925 7.374l-1.228 1.304a24 24 0 0 1-1.596 1.542v5.038c0 .615-.323 1.184-.85 1.5l-4.514 2.709a.75.75 0 0 1-1.12-.488l-.963-4.572a1.3 1.3 0 0 1-.14-.129L8.04 15.96l-1.994-1.873a1.3 1.3 0 0 1-.129-.14l-4.571-.963a.75.75 0 0 1-.49-1.12l2.71-4.514c.316-.527.885-.85 1.5-.85h5.037a24 24 0 0 1 1.542-1.594l1.304-1.23A10.75 10.75 0 0 1 20.321.75Zm-6.344 4.018v-.001l-1.304 1.23a22.3 22.3 0 0 0-3.255 3.851l-2.193 3.29 1.859 1.744.034.034 1.743 1.858 3.288-2.192a22.3 22.3 0 0 0 3.854-3.257l1.228-1.303a9.25 9.25 0 0 0 2.517-6.346V2.5a.25.25 0 0 0-.25-.25h-1.177a9.25 9.25 0 0 0-6.344 2.518M6.5 21c-1.209 1.209-3.901 1.445-4.743 1.49a.24.24 0 0 1-.18-.067.24.24 0 0 1-.067-.18c.045-.842.281-3.534 1.49-4.743.9-.9 2.6-.9 3.5 0s.9 2.6 0 3.5m-.592-8.588L8.17 9.017q.346-.519.717-1.017H5.066a.25.25 0 0 0-.214.121l-2.167 3.612ZM16 15.112q-.5.372-1.018.718l-3.393 2.262.678 3.223 3.612-2.167a.25.25 0 0 0 .121-.214ZM17.5 8a1.5 1.5 0 1 1-3.001-.001A1.5 1.5 0 0 1 17.5 8"/></svg></span> The package is updated automatically from file <a href="https://github.com/nlohmann/json/blob/develop/meson.build"><code>meson.build</code></a>.</li> <li><span class=twemoji><svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M3 3a2 2 0 0 1 2-2h9.982a2 2 0 0 1 1.414.586l4.018 4.018A2 2 0 0 1 21 7.018V21a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2Zm2-.5a.5.5 0 0 0-.5.5v18a.5.5 0 0 0 .5.5h14a.5.5 0 0 0 .5-.5V8.5h-4a2 2 0 0 1-2-2v-4Zm10 0v4a.5.5 0 0 0 .5.5h4a.5.5 0 0 0-.146-.336l-4.018-4.018A.5.5 0 0 0 15 2.5"/></svg></span> File issues at the <a href="https://github.com/nlohmann/json/issues">library issue tracker</a></li> <li><span class=twemoji><svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M10.97 8.265a1.45 1.45 0 0 0-.487.57.75.75 0 0 1-1.341-.67c.2-.402.513-.826.997-1.148C10.627 6.69 11.244 6.5 12 6.5c.658 0 1.369.195 1.934.619a2.45 2.45 0 0 1 1.004 2.006c0 1.033-.513 1.72-1.027 2.215-.19.183-.399.358-.579.508l-.147.123a4 4 0 0 0-.435.409v1.37a.75.75 0 1 1-1.5 0v-1.473c0-.237.067-.504.247-.736.22-.28.486-.517.718-.714l.183-.153.001-.001c.172-.143.324-.27.47-.412.368-.355.569-.676.569-1.136a.95.95 0 0 0-.404-.806C12.766 8.118 12.384 8 12 8c-.494 0-.814.121-1.03.265M13 17a1 1 0 1 1-2 0 1 1 0 0 1 2 0"/><path d="M12 1c6.075 0 11 4.925 11 11s-4.925 11-11 11S1 18.075 1 12 5.925 1 12 1M2.5 12a9.5 9.5 0 0 0 9.5 9.5 9.5 9.5 0 0 0 9.5-9.5A9.5 9.5 0 0 0 12 2.5 9.5 9.5 0 0 0 2.5 12"/></svg></span> <a href="https://mesonbuild.com/index.html">Meson website</a></li> </ul> </div> <p>If you are using the <a href="http://mesonbuild.com">Meson Build System</a>, add this source tree as a <a href="https://mesonbuild.com/Subprojects.html#using-a-subproject">meson subproject</a>. You may also use the <code>include.zip</code> published in this project's <a href="https://github.com/nlohmann/json/releases">Releases</a> to reduce the size of the vendored source tree. Alternatively, you can get a wrap file by downloading it from <a href="https://mesonbuild.com/Wrapdb-projects.html">Meson WrapDB</a>, or use</p> <div class=highlight><pre><span></span><code>meson<span class=w> </span>wrap<span class=w> </span>install<span class=w> </span>nlohmann_json
|
||||
</code></pre></div> <p>Please see the Meson project for any issues regarding the packaging.</p> <p>The provided <code>meson.build</code> can also be used as an alternative to CMake for installing <code>nlohmann_json</code> system-wide in which case a pkg-config file is installed. To use it, have your build system require the <code>nlohmann_json</code> pkg-config dependency. In Meson, it is preferred to use the <a href="https://mesonbuild.com/Reference-manual.html#dependency"><code>dependency()</code></a> object with a subproject fallback, rather than using the subproject directly.</p> <details class=example> <summary>Example: Wrap</summary> <ol> <li> <p>Create the following files:</p> <div class=highlight><span class=filename>meson.build</span><pre><span></span><code><span class=na>project('json_example', 'cpp',</span>
|
||||
<span class=w> </span><span class=na>version</span><span class=o>:</span><span class=w> </span><span class=s>'1.0'</span><span class=na>,</span>
|
||||
<span class=w> </span><span class=na>default_options</span><span class=o>:</span><span class=w> </span><span class=s>['cpp_std=c++11']</span>
|
||||
</code></pre></div> <p>Please see the Meson project for any issues regarding the packaging.</p> <p>The provided <code>meson.build</code> can also be used as an alternative to CMake for installing <code>nlohmann_json</code> system-wide in which case a pkg-config file is installed. To use it, have your build system require the <code>nlohmann_json</code> pkg-config dependency. In Meson, it is preferred to use the <a href="https://mesonbuild.com/Reference-manual.html#dependency"><code>dependency()</code></a> object with a subproject fallback, rather than using the subproject directly.</p> <details class=example> <summary>Example: Wrap</summary> <ol> <li> <p>Create the following files:</p> <div class=highlight><span class=filename>meson.build</span><pre><span></span><code><span class=na>project('json_example', 'cpp',</span>
|
||||
<span class=w> </span><span class=na>version</span><span class=o>:</span><span class=w> </span><span class=s>'1.0'</span><span class=na>,</span>
|
||||
<span class=w> </span><span class=na>default_options</span><span class=o>:</span><span class=w> </span><span class=s>['cpp_std=c++11']</span>
|
||||
<span class=na>)</span>
|
||||
|
||||
<span class=na>dependency_json</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=s>dependency('nlohmann_json', required: true)</span>
|
||||
<span class=na>dependency_json</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=s>dependency('nlohmann_json', required: true)</span>
|
||||
|
||||
<span class=na>executable('json_example',</span>
|
||||
<span class=w> </span><span class=na>sources</span><span class=o>:</span><span class=w> </span><span class=s>['example.cpp'],</span>
|
||||
<span class=na>executable('json_example',</span>
|
||||
<span class=w> </span><span class=na>sources</span><span class=o>:</span><span class=w> </span><span class=s>['example.cpp'],</span>
|
||||
<span class=w> </span><span class=na>dependencies</span><span class=o>:</span><span class=w> </span><span class=s>[dependency_json],</span>
|
||||
<span class=w> </span><span class=na>install</span><span class=o>:</span><span class=w> </span><span class=s>true</span>
|
||||
<span class=na>)</span>
|
||||
@@ -86,11 +86,11 @@ meson<span class=w> </span>wrap<span class=w> </span>install<span class=w> </spa
|
||||
</code></pre></div> </li> <li> <p>Build:</p> <div class=highlight><pre><span></span><code>meson<span class=w> </span>setup<span class=w> </span>build
|
||||
meson<span class=w> </span>compile<span class=w> </span>-C<span class=w> </span>build
|
||||
</code></pre></div> </li> </ol> </details> <h2 id=bazel>Bazel<a class=headerlink href=#bazel title="Permanent link">¶</a></h2> <div class="admonition abstract"> <p class=admonition-title>Summary</p> <p>use <code>bazel_dep</code>, <code>git_override</code>, or <code>local_path_override</code></p> <ul> <li><span class=twemoji><svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M7.75 6.5a1.25 1.25 0 1 0 0 2.5 1.25 1.25 0 0 0 0-2.5"/><path d="M2.5 1h8.44a1.5 1.5 0 0 1 1.06.44l10.25 10.25a1.5 1.5 0 0 1 0 2.12l-8.44 8.44a1.5 1.5 0 0 1-2.12 0L1.44 12A1.5 1.5 0 0 1 1 10.94V2.5A1.5 1.5 0 0 1 2.5 1m0 1.5v8.44l10.25 10.25 8.44-8.44L10.94 2.5Z"/></svg></span> Any version, that is available via <a href="https://registry.bazel.build/modules/nlohmann_json">Bazel Central Registry</a></li> <li><span class=twemoji><svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M3 3a2 2 0 0 1 2-2h9.982a2 2 0 0 1 1.414.586l4.018 4.018A2 2 0 0 1 21 7.018V21a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2Zm2-.5a.5.5 0 0 0-.5.5v18a.5.5 0 0 0 .5.5h14a.5.5 0 0 0 .5-.5V8.5h-4a2 2 0 0 1-2-2v-4Zm10 0v4a.5.5 0 0 0 .5.5h4a.5.5 0 0 0-.146-.336l-4.018-4.018A.5.5 0 0 0 15 2.5"/></svg></span> File issues at the <a href="https://github.com/nlohmann/json/issues">library issue tracker</a></li> <li><span class=twemoji><svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M10.97 8.265a1.45 1.45 0 0 0-.487.57.75.75 0 0 1-1.341-.67c.2-.402.513-.826.997-1.148C10.627 6.69 11.244 6.5 12 6.5c.658 0 1.369.195 1.934.619a2.45 2.45 0 0 1 1.004 2.006c0 1.033-.513 1.72-1.027 2.215-.19.183-.399.358-.579.508l-.147.123a4 4 0 0 0-.435.409v1.37a.75.75 0 1 1-1.5 0v-1.473c0-.237.067-.504.247-.736.22-.28.486-.517.718-.714l.183-.153.001-.001c.172-.143.324-.27.47-.412.368-.355.569-.676.569-1.136a.95.95 0 0 0-.404-.806C12.766 8.118 12.384 8 12 8c-.494 0-.814.121-1.03.265M13 17a1 1 0 1 1-2 0 1 1 0 0 1 2 0"/><path d="M12 1c6.075 0 11 4.925 11 11s-4.925 11-11 11S1 18.075 1 12 5.925 1 12 1M2.5 12a9.5 9.5 0 0 0 9.5 9.5 9.5 9.5 0 0 0 9.5-9.5A9.5 9.5 0 0 0 12 2.5 9.5 9.5 0 0 0 2.5 12"/></svg></span> <a href="https://bazel.build">Bazel website</a></li> </ul> </div> <p>This repository provides a <a href="https://bazel.build/">Bazel</a> <code>MODULE.bazel</code> and a corresponding <code>BUILD.bazel</code> file. Therefore, this repository can be referenced within a <code>MODULE.bazel</code> by rules such as <code>archive_override</code>, <code>git_override</code>, or <code>local_path_override</code>. To use the library, you need to depend on the target <code>@nlohmann_json//:json</code> (i.e., via <code>deps</code> attribute).</p> <details class=example> <summary>Example</summary> <ol> <li> <p>Create the following files:</p> <div class=highlight><span class=filename>BUILD</span><pre><span></span><code><span class=na>cc_binary(</span>
|
||||
<span class=w> </span><span class=na>name</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=s>"main"</span><span class=na>,</span>
|
||||
<span class=w> </span><span class=na>srcs</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=s>["example.cpp"],</span>
|
||||
<span class=w> </span><span class=na>deps</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=s>["@nlohmann_json//:json"],</span>
|
||||
<span class=w> </span><span class=na>name</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=s>"main"</span><span class=na>,</span>
|
||||
<span class=w> </span><span class=na>srcs</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=s>["example.cpp"],</span>
|
||||
<span class=w> </span><span class=na>deps</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=s>["@nlohmann_json//:json"],</span>
|
||||
<span class=na>)</span>
|
||||
</code></pre></div> <div class=highlight><span class=filename>WORKSPACE</span><pre><span></span><code><span class=na>bazel_dep(name</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=s>"nlohmann_json"</span><span class=na>, version</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=s>"3.11.3.bcr.1"</span><span class=na>)</span>
|
||||
</code></pre></div> <div class=highlight><span class=filename>WORKSPACE</span><pre><span></span><code><span class=na>bazel_dep(name</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=s>"nlohmann_json"</span><span class=na>, version</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=s>"3.11.3.bcr.1"</span><span class=na>)</span>
|
||||
</code></pre></div> <div class=highlight><span class=filename>example.cpp</span><pre><span></span><code><span class=cp>#include</span><span class=w> </span><span class=cpf><nlohmann/json.hpp></span>
|
||||
<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>
|
||||
@@ -127,7 +127,7 @@ bazel<span class=w> </span>run<span class=w> </span>//:main
|
||||
<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>4</span><span class=p>)</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>meta</span><span class=p>()</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>endl</span><span class=p>;</span>
|
||||
<span class=p>}</span>
|
||||
</code></pre></div> </li> <li> <p>Call Conan:</p> <div class=highlight><pre><span></span><code>conan<span class=w> </span>install<span class=w> </span>.<span class=w> </span>--output-folder<span class=o>=</span>build<span class=w> </span>--build<span class=o>=</span>missing
|
||||
</code></pre></div> </li> <li> <p>Build:</p> <div class=highlight><pre><span></span><code>cmake<span class=w> </span>-S<span class=w> </span>.<span class=w> </span>-B<span class=w> </span>build<span class=w> </span>-DCMAKE_TOOLCHAIN_FILE<span class=o>=</span><span class=s2>"conan_toolchain.cmake"</span><span class=w> </span>-DCMAKE_BUILD_TYPE<span class=o>=</span>Release
|
||||
</code></pre></div> </li> <li> <p>Build:</p> <div class=highlight><pre><span></span><code>cmake<span class=w> </span>-S<span class=w> </span>.<span class=w> </span>-B<span class=w> </span>build<span class=w> </span>-DCMAKE_TOOLCHAIN_FILE<span class=o>=</span><span class=s2>"conan_toolchain.cmake"</span><span class=w> </span>-DCMAKE_BUILD_TYPE<span class=o>=</span>Release
|
||||
cmake<span class=w> </span>--build<span class=w> </span>build
|
||||
</code></pre></div> </li> </ol> </details> <h2 id=spack>Spack<a class=headerlink href=#spack title="Permanent link">¶</a></h2> <div class="admonition abstract"> <p class=admonition-title>Summary</p> <p>package: <a href="https://packages.spack.io/package.html?name=nlohmann-json"><strong><code>nlohmann-json</code></strong></a></p> <ul> <li><a href="https://repology.org/project/nlohmann-json/versions"><img alt="Spack package" src="../../assets/external/repology.org/badge/version-for-repo/spack/nlohmann-json.svg"></a></li> <li><span class=twemoji><svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M7.75 6.5a1.25 1.25 0 1 0 0 2.5 1.25 1.25 0 0 0 0-2.5"/><path d="M2.5 1h8.44a1.5 1.5 0 0 1 1.06.44l10.25 10.25a1.5 1.5 0 0 1 0 2.12l-8.44 8.44a1.5 1.5 0 0 1-2.12 0L1.44 12A1.5 1.5 0 0 1 1 10.94V2.5A1.5 1.5 0 0 1 2.5 1m0 1.5v8.44l10.25 10.25 8.44-8.44L10.94 2.5Z"/></svg></span> Available versions: current version and older versions (see <a href="https://packages.spack.io/package.html?name=nlohmann-json">Spack package</a>)</li> <li><span class=twemoji><svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M20.322.75h1.176a1.75 1.75 0 0 1 1.75 1.749v1.177a10.75 10.75 0 0 1-2.925 7.374l-1.228 1.304a24 24 0 0 1-1.596 1.542v5.038c0 .615-.323 1.184-.85 1.5l-4.514 2.709a.75.75 0 0 1-1.12-.488l-.963-4.572a1.3 1.3 0 0 1-.14-.129L8.04 15.96l-1.994-1.873a1.3 1.3 0 0 1-.129-.14l-4.571-.963a.75.75 0 0 1-.49-1.12l2.71-4.514c.316-.527.885-.85 1.5-.85h5.037a24 24 0 0 1 1.542-1.594l1.304-1.23A10.75 10.75 0 0 1 20.321.75Zm-6.344 4.018v-.001l-1.304 1.23a22.3 22.3 0 0 0-3.255 3.851l-2.193 3.29 1.859 1.744.034.034 1.743 1.858 3.288-2.192a22.3 22.3 0 0 0 3.854-3.257l1.228-1.303a9.25 9.25 0 0 0 2.517-6.346V2.5a.25.25 0 0 0-.25-.25h-1.177a9.25 9.25 0 0 0-6.344 2.518M6.5 21c-1.209 1.209-3.901 1.445-4.743 1.49a.24.24 0 0 1-.18-.067.24.24 0 0 1-.067-.18c.045-.842.281-3.534 1.49-4.743.9-.9 2.6-.9 3.5 0s.9 2.6 0 3.5m-.592-8.588L8.17 9.017q.346-.519.717-1.017H5.066a.25.25 0 0 0-.214.121l-2.167 3.612ZM16 15.112q-.5.372-1.018.718l-3.393 2.262.678 3.223 3.612-2.167a.25.25 0 0 0 .121-.214ZM17.5 8a1.5 1.5 0 1 1-3.001-.001A1.5 1.5 0 0 1 17.5 8"/></svg></span> The package is updated with every release.</li> <li><span class=twemoji><svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M12 2.5a5.5 5.5 0 0 1 3.096 10.047 9.005 9.005 0 0 1 5.9 8.181.75.75 0 1 1-1.499.044 7.5 7.5 0 0 0-14.993 0 .75.75 0 0 1-1.5-.045 9.005 9.005 0 0 1 5.9-8.18A5.5 5.5 0 0 1 12 2.5M8 8a4 4 0 1 0 8 0 4 4 0 0 0-8 0"/></svg></span> Maintainer: <a href="https://github.com/ax3l">Axel Huebl</a></li> <li><span class=twemoji><svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M3 3a2 2 0 0 1 2-2h9.982a2 2 0 0 1 1.414.586l4.018 4.018A2 2 0 0 1 21 7.018V21a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2Zm2-.5a.5.5 0 0 0-.5.5v18a.5.5 0 0 0 .5.5h14a.5.5 0 0 0 .5-.5V8.5h-4a2 2 0 0 1-2-2v-4Zm10 0v4a.5.5 0 0 0 .5.5h4a.5.5 0 0 0-.146-.336l-4.018-4.018A.5.5 0 0 0 15 2.5"/></svg></span> File issues at the <a href="https://github.com/spack/spack/issues">Spack issue tracker</a></li> <li><span class=twemoji><svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M10.97 8.265a1.45 1.45 0 0 0-.487.57.75.75 0 0 1-1.341-.67c.2-.402.513-.826.997-1.148C10.627 6.69 11.244 6.5 12 6.5c.658 0 1.369.195 1.934.619a2.45 2.45 0 0 1 1.004 2.006c0 1.033-.513 1.72-1.027 2.215-.19.183-.399.358-.579.508l-.147.123a4 4 0 0 0-.435.409v1.37a.75.75 0 1 1-1.5 0v-1.473c0-.237.067-.504.247-.736.22-.28.486-.517.718-.714l.183-.153.001-.001c.172-.143.324-.27.47-.412.368-.355.569-.676.569-1.136a.95.95 0 0 0-.404-.806C12.766 8.118 12.384 8 12 8c-.494 0-.814.121-1.03.265M13 17a1 1 0 1 1-2 0 1 1 0 0 1 2 0"/><path d="M12 1c6.075 0 11 4.925 11 11s-4.925 11-11 11S1 18.075 1 12 5.925 1 12 1M2.5 12a9.5 9.5 0 0 0 9.5 9.5 9.5 9.5 0 0 0 9.5-9.5A9.5 9.5 0 0 0 12 2.5 9.5 9.5 0 0 0 2.5 12"/></svg></span> <a href="https://spack.io">Spack website</a></li> </ul> </div> <p>If you are using <a href="https://www.spack.io/">Spack</a> to manage your dependencies, you can use the <a href="https://packages.spack.io/package.html?name=nlohmann-json"><code>nlohmann-json</code> package</a> via</p> <div class=highlight><pre><span></span><code>spack<span class=w> </span>install<span class=w> </span>nlohmann-json
|
||||
</code></pre></div> <p>Please see the <a href="https://github.com/spack/spack">Spack project</a> for any issues regarding the packaging.</p> <details class=example> <summary>Example</summary> <ol> <li> <p>Create the following files:</p> <div class=highlight><span class=filename>CMakeLists.txt</span><pre><span></span><code><span class=nb>cmake_minimum_required</span><span class=p>(</span><span class=s>VERSION</span><span class=w> </span><span class=s>3.15</span><span class=p>)</span>
|
||||
@@ -154,10 +154,10 @@ cmake<span class=w> </span>--build<span class=w> </span>build
|
||||
</code></pre></div> </li> </ol> </details> <h2 id=hunter>Hunter<a class=headerlink href=#hunter title="Permanent link">¶</a></h2> <div class="admonition abstract"> <p class=admonition-title>Summary</p> <p>package: <a href="https://hunter.readthedocs.io/en/latest/packages/pkg/nlohmann_json.html"><strong><code>nlohmann_json</code></strong></a></p> <ul> <li><span class=twemoji><svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M7.75 6.5a1.25 1.25 0 1 0 0 2.5 1.25 1.25 0 0 0 0-2.5"/><path d="M2.5 1h8.44a1.5 1.5 0 0 1 1.06.44l10.25 10.25a1.5 1.5 0 0 1 0 2.12l-8.44 8.44a1.5 1.5 0 0 1-2.12 0L1.44 12A1.5 1.5 0 0 1 1 10.94V2.5A1.5 1.5 0 0 1 2.5 1m0 1.5v8.44l10.25 10.25 8.44-8.44L10.94 2.5Z"/></svg></span> Available versions: current version and older versions (see <a href="https://hunter.readthedocs.io/en/latest/packages/pkg/nlohmann_json.html">Hunter package</a>)</li> <li><span class=twemoji><svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M20.322.75h1.176a1.75 1.75 0 0 1 1.75 1.749v1.177a10.75 10.75 0 0 1-2.925 7.374l-1.228 1.304a24 24 0 0 1-1.596 1.542v5.038c0 .615-.323 1.184-.85 1.5l-4.514 2.709a.75.75 0 0 1-1.12-.488l-.963-4.572a1.3 1.3 0 0 1-.14-.129L8.04 15.96l-1.994-1.873a1.3 1.3 0 0 1-.129-.14l-4.571-.963a.75.75 0 0 1-.49-1.12l2.71-4.514c.316-.527.885-.85 1.5-.85h5.037a24 24 0 0 1 1.542-1.594l1.304-1.23A10.75 10.75 0 0 1 20.321.75Zm-6.344 4.018v-.001l-1.304 1.23a22.3 22.3 0 0 0-3.255 3.851l-2.193 3.29 1.859 1.744.034.034 1.743 1.858 3.288-2.192a22.3 22.3 0 0 0 3.854-3.257l1.228-1.303a9.25 9.25 0 0 0 2.517-6.346V2.5a.25.25 0 0 0-.25-.25h-1.177a9.25 9.25 0 0 0-6.344 2.518M6.5 21c-1.209 1.209-3.901 1.445-4.743 1.49a.24.24 0 0 1-.18-.067.24.24 0 0 1-.067-.18c.045-.842.281-3.534 1.49-4.743.9-.9 2.6-.9 3.5 0s.9 2.6 0 3.5m-.592-8.588L8.17 9.017q.346-.519.717-1.017H5.066a.25.25 0 0 0-.214.121l-2.167 3.612ZM16 15.112q-.5.372-1.018.718l-3.393 2.262.678 3.223 3.612-2.167a.25.25 0 0 0 .121-.214ZM17.5 8a1.5 1.5 0 1 1-3.001-.001A1.5 1.5 0 0 1 17.5 8"/></svg></span> The package is updated with every release.</li> <li><span class=twemoji><svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M3 3a2 2 0 0 1 2-2h9.982a2 2 0 0 1 1.414.586l4.018 4.018A2 2 0 0 1 21 7.018V21a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2Zm2-.5a.5.5 0 0 0-.5.5v18a.5.5 0 0 0 .5.5h14a.5.5 0 0 0 .5-.5V8.5h-4a2 2 0 0 1-2-2v-4Zm10 0v4a.5.5 0 0 0 .5.5h4a.5.5 0 0 0-.146-.336l-4.018-4.018A.5.5 0 0 0 15 2.5"/></svg></span> File issues at the <a href="https://github.com/cpp-pm/hunter/issues">Hunter issue tracker</a></li> <li><span class=twemoji><svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M10.97 8.265a1.45 1.45 0 0 0-.487.57.75.75 0 0 1-1.341-.67c.2-.402.513-.826.997-1.148C10.627 6.69 11.244 6.5 12 6.5c.658 0 1.369.195 1.934.619a2.45 2.45 0 0 1 1.004 2.006c0 1.033-.513 1.72-1.027 2.215-.19.183-.399.358-.579.508l-.147.123a4 4 0 0 0-.435.409v1.37a.75.75 0 1 1-1.5 0v-1.473c0-.237.067-.504.247-.736.22-.28.486-.517.718-.714l.183-.153.001-.001c.172-.143.324-.27.47-.412.368-.355.569-.676.569-1.136a.95.95 0 0 0-.404-.806C12.766 8.118 12.384 8 12 8c-.494 0-.814.121-1.03.265M13 17a1 1 0 1 1-2 0 1 1 0 0 1 2 0"/><path d="M12 1c6.075 0 11 4.925 11 11s-4.925 11-11 11S1 18.075 1 12 5.925 1 12 1M2.5 12a9.5 9.5 0 0 0 9.5 9.5 9.5 9.5 0 0 0 9.5-9.5A9.5 9.5 0 0 0 12 2.5 9.5 9.5 0 0 0 2.5 12"/></svg></span> <a href="https://hunter.readthedocs.io/en/latest/">Hunter website</a></li> </ul> </div> <p>If you are using <a href="https://github.com/cpp-pm/hunter">Hunter</a> on your project for external dependencies, then you can use the <a href="https://hunter.readthedocs.io/en/latest/packages/pkg/nlohmann_json.html">nlohmann_json package</a> via</p> <div class=highlight><pre><span></span><code><span class=nb>hunter_add_package</span><span class=p>(</span><span class=s>nlohmann_json</span><span class=p>)</span>
|
||||
</code></pre></div> <p>Please see the Hunter project for any issues regarding the packaging.</p> <details class=example> <summary>Example</summary> <ol> <li> <p>Create the following files:</p> <div class=highlight><span class=filename>CMakeLists.txt</span><pre><span></span><code><span class=nb>cmake_minimum_required</span><span class=p>(</span><span class=s>VERSION</span><span class=w> </span><span class=s>3.15</span><span class=p>)</span>
|
||||
|
||||
<span class=nb>include</span><span class=p>(</span><span class=s2>"cmake/HunterGate.cmake"</span><span class=p>)</span>
|
||||
<span class=nb>include</span><span class=p>(</span><span class=s2>"cmake/HunterGate.cmake"</span><span class=p>)</span>
|
||||
<span class=nb>HunterGate</span><span class=p>(</span>
|
||||
<span class=w> </span><span class=s>URL</span><span class=w> </span><span class=s2>"https://github.com/cpp-pm/hunter/archive/v0.23.297.tar.gz"</span>
|
||||
<span class=w> </span><span class=s>SHA1</span><span class=w> </span><span class=s2>"3319fe6a3b08090df7df98dee75134d68e2ef5a3"</span>
|
||||
<span class=w> </span><span class=s>URL</span><span class=w> </span><span class=s2>"https://github.com/cpp-pm/hunter/archive/v0.23.297.tar.gz"</span>
|
||||
<span class=w> </span><span class=s>SHA1</span><span class=w> </span><span class=s2>"3319fe6a3b08090df7df98dee75134d68e2ef5a3"</span>
|
||||
<span class=p>)</span>
|
||||
|
||||
<span class=nb>project</span><span class=p>(</span><span class=s>json_example</span><span class=p>)</span>
|
||||
@@ -225,12 +225,12 @@ cmake<span class=w> </span>--build<span class=w> </span>build
|
||||
</code></pre></div> </li> <li> <p>Build</p> <div class=highlight><pre><span></span><code>cmake<span class=w> </span>-S<span class=w> </span>.<span class=w> </span>-B<span class=w> </span>build<span class=w> </span>-DCMAKE_TOOLCHAIN_FILE<span class=o>=</span>cget/cget/cget.cmake
|
||||
cmake<span class=w> </span>--build<span class=w> </span>build
|
||||
</code></pre></div> </li> </ol> </details> <h2 id=swift-package-manager>Swift Package Manager<a class=headerlink href=#swift-package-manager title="Permanent link">¶</a></h2> <div class="admonition abstract"> <p class=admonition-title>Summary</p> <p>package: <strong><code>nlohmann/json</code></strong></p> <ul> <li><span class=twemoji><svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M7.75 6.5a1.25 1.25 0 1 0 0 2.5 1.25 1.25 0 0 0 0-2.5"/><path d="M2.5 1h8.44a1.5 1.5 0 0 1 1.06.44l10.25 10.25a1.5 1.5 0 0 1 0 2.12l-8.44 8.44a1.5 1.5 0 0 1-2.12 0L1.44 12A1.5 1.5 0 0 1 1 10.94V2.5A1.5 1.5 0 0 1 2.5 1m0 1.5v8.44l10.25 10.25 8.44-8.44L10.94 2.5Z"/></svg></span> Available versions: current version and older versions</li> <li><span class=twemoji><svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M20.322.75h1.176a1.75 1.75 0 0 1 1.75 1.749v1.177a10.75 10.75 0 0 1-2.925 7.374l-1.228 1.304a24 24 0 0 1-1.596 1.542v5.038c0 .615-.323 1.184-.85 1.5l-4.514 2.709a.75.75 0 0 1-1.12-.488l-.963-4.572a1.3 1.3 0 0 1-.14-.129L8.04 15.96l-1.994-1.873a1.3 1.3 0 0 1-.129-.14l-4.571-.963a.75.75 0 0 1-.49-1.12l2.71-4.514c.316-.527.885-.85 1.5-.85h5.037a24 24 0 0 1 1.542-1.594l1.304-1.23A10.75 10.75 0 0 1 20.321.75Zm-6.344 4.018v-.001l-1.304 1.23a22.3 22.3 0 0 0-3.255 3.851l-2.193 3.29 1.859 1.744.034.034 1.743 1.858 3.288-2.192a22.3 22.3 0 0 0 3.854-3.257l1.228-1.303a9.25 9.25 0 0 0 2.517-6.346V2.5a.25.25 0 0 0-.25-.25h-1.177a9.25 9.25 0 0 0-6.344 2.518M6.5 21c-1.209 1.209-3.901 1.445-4.743 1.49a.24.24 0 0 1-.18-.067.24.24 0 0 1-.067-.18c.045-.842.281-3.534 1.49-4.743.9-.9 2.6-.9 3.5 0s.9 2.6 0 3.5m-.592-8.588L8.17 9.017q.346-.519.717-1.017H5.066a.25.25 0 0 0-.214.121l-2.167 3.612ZM16 15.112q-.5.372-1.018.718l-3.393 2.262.678 3.223 3.612-2.167a.25.25 0 0 0 .121-.214ZM17.5 8a1.5 1.5 0 1 1-3.001-.001A1.5 1.5 0 0 1 17.5 8"/></svg></span> The package is updated with every release.</li> <li><span class=twemoji><svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M3 3a2 2 0 0 1 2-2h9.982a2 2 0 0 1 1.414.586l4.018 4.018A2 2 0 0 1 21 7.018V21a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2Zm2-.5a.5.5 0 0 0-.5.5v18a.5.5 0 0 0 .5.5h14a.5.5 0 0 0 .5-.5V8.5h-4a2 2 0 0 1-2-2v-4Zm10 0v4a.5.5 0 0 0 .5.5h4a.5.5 0 0 0-.146-.336l-4.018-4.018A.5.5 0 0 0 15 2.5"/></svg></span> File issues at the <a href="https://github.com/nlohmann/json/issues">library issue tracker</a></li> <li><span class=twemoji><svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M10.97 8.265a1.45 1.45 0 0 0-.487.57.75.75 0 0 1-1.341-.67c.2-.402.513-.826.997-1.148C10.627 6.69 11.244 6.5 12 6.5c.658 0 1.369.195 1.934.619a2.45 2.45 0 0 1 1.004 2.006c0 1.033-.513 1.72-1.027 2.215-.19.183-.399.358-.579.508l-.147.123a4 4 0 0 0-.435.409v1.37a.75.75 0 1 1-1.5 0v-1.473c0-.237.067-.504.247-.736.22-.28.486-.517.718-.714l.183-.153.001-.001c.172-.143.324-.27.47-.412.368-.355.569-.676.569-1.136a.95.95 0 0 0-.404-.806C12.766 8.118 12.384 8 12 8c-.494 0-.814.121-1.03.265M13 17a1 1 0 1 1-2 0 1 1 0 0 1 2 0"/><path d="M12 1c6.075 0 11 4.925 11 11s-4.925 11-11 11S1 18.075 1 12 5.925 1 12 1M2.5 12a9.5 9.5 0 0 0 9.5 9.5 9.5 9.5 0 0 0 9.5-9.5A9.5 9.5 0 0 0 12 2.5 9.5 9.5 0 0 0 2.5 12"/></svg></span> <a href="https://developer.apple.com/documentation/xcode/adding-package-dependencies-to-your-app">Xcode documentation</a></li> </ul> </div> <h2 id=nuget>NuGet<a class=headerlink href=#nuget title="Permanent link">¶</a></h2> <div class="admonition abstract"> <p class=admonition-title>Summary</p> <p>package: <a href="https://www.nuget.org/packages/nlohmann.json/"><strong><code>nlohmann.json</code></strong></a></p> <ul> <li><span class=twemoji><svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M7.75 6.5a1.25 1.25 0 1 0 0 2.5 1.25 1.25 0 0 0 0-2.5"/><path d="M2.5 1h8.44a1.5 1.5 0 0 1 1.06.44l10.25 10.25a1.5 1.5 0 0 1 0 2.12l-8.44 8.44a1.5 1.5 0 0 1-2.12 0L1.44 12A1.5 1.5 0 0 1 1 10.94V2.5A1.5 1.5 0 0 1 2.5 1m0 1.5v8.44l10.25 10.25 8.44-8.44L10.94 2.5Z"/></svg></span> Available versions: current and previous versions</li> <li><span class=twemoji><svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M20.322.75h1.176a1.75 1.75 0 0 1 1.75 1.749v1.177a10.75 10.75 0 0 1-2.925 7.374l-1.228 1.304a24 24 0 0 1-1.596 1.542v5.038c0 .615-.323 1.184-.85 1.5l-4.514 2.709a.75.75 0 0 1-1.12-.488l-.963-4.572a1.3 1.3 0 0 1-.14-.129L8.04 15.96l-1.994-1.873a1.3 1.3 0 0 1-.129-.14l-4.571-.963a.75.75 0 0 1-.49-1.12l2.71-4.514c.316-.527.885-.85 1.5-.85h5.037a24 24 0 0 1 1.542-1.594l1.304-1.23A10.75 10.75 0 0 1 20.321.75Zm-6.344 4.018v-.001l-1.304 1.23a22.3 22.3 0 0 0-3.255 3.851l-2.193 3.29 1.859 1.744.034.034 1.743 1.858 3.288-2.192a22.3 22.3 0 0 0 3.854-3.257l1.228-1.303a9.25 9.25 0 0 0 2.517-6.346V2.5a.25.25 0 0 0-.25-.25h-1.177a9.25 9.25 0 0 0-6.344 2.518M6.5 21c-1.209 1.209-3.901 1.445-4.743 1.49a.24.24 0 0 1-.18-.067.24.24 0 0 1-.067-.18c.045-.842.281-3.534 1.49-4.743.9-.9 2.6-.9 3.5 0s.9 2.6 0 3.5m-.592-8.588L8.17 9.017q.346-.519.717-1.017H5.066a.25Line truncated
|
||||
</code></pre></div> <details class=example> <summary>Example</summary> <p>Probably the easiest way to use NuGet packages is through Visual Studio graphical interface. Right-click on a project (any C++ project would do) in “Solution Explorer” and select “Manage NuGet Packages…”</p> <p><img alt src=../nuget/nuget-search-package.png></p> <p>Now you can click on “Browse” tab and find the package you like to install.</p> <p><img alt src=../nuget/nuget-select-package.png></p> <p>Most of the packages in NuGet gallery are .NET packages and would not be useful in a C++ project. Microsoft recommends adding “native” and “nativepackage” tags to C++ NuGet packages to distinguish them, but even adding “native” to search query would still show many .NET-only packages in the list.</p> <p>Nevertheless, after finding the package you want, click on “Install” button and accept confirmation dialogs. After the package is successfully added to the projects, you should be able to build and execute the project without the need for making any more changes to build settings.</p> <div class="admonition note"> <p class=admonition-title>Note</p> <p>A few notes:</p> <ul> <li>NuGet packages are installed per project and not system-wide. The header and binaries for the package are only available to the project it is added to, and not other projects (obviously unless we add the package to those projects as well)</li> <li>One of the many great things about your elegant work is that it is a header-only library, which makes deployment very straightforward. In case of libraries which need binary deployment (<code>.lib</code>, <code>.dll</code> and <code>.pdb</code> for debug info) the different binaries for each supported compiler version must be added to the NuGet package. Some library creators cram binary versions for all supported Visual C++ compiler versions in the same package, so a single package will support all compilers. Some others create a different package for each compiler version (and you usually see things like “v140” or “vc141” in package name to clarify which VC++ compiler this package supports).</li> <li>Packages can have dependency to other packages, and in this case, NuGet will install all dependencies as well as the requested package recursively.</li> </ul> </div> <p><strong>What happens behind the scenes</strong></p> <p>After you add a NuGet package, three changes occur in the project source directory. Of course, we could make these changes manually instead of using GUI:</p> <p><img alt src=../nuget/nuget-project-changes.png></p> <ol> <li> <p>A <code>packages.config</code> file will be created (or updated to include the package name if one such file already exists). This file contains a list of the packages required by this project (name and minimum version) and must be added to the project source code repository, so if you move the source code to a new machine, MSBuild/NuGet knows which packages it has to restore (which it does automatically before each build).</p> <div class=highlight><pre><span></span><code><span class=cp><?xml version="1.0" encoding="utf-8"?></span>
|
||||
</code></pre></div> <details class=example> <summary>Example</summary> <p>Probably the easiest way to use NuGet packages is through Visual Studio graphical interface. Right-click on a project (any C++ project would do) in “Solution Explorer” and select “Manage NuGet Packages…”</p> <p><img alt src=../nuget/nuget-search-package.png></p> <p>Now you can click on “Browse” tab and find the package you like to install.</p> <p><img alt src=../nuget/nuget-select-package.png></p> <p>Most of the packages in NuGet gallery are .NET packages and would not be useful in a C++ project. Microsoft recommends adding “native” and “nativepackage” tags to C++ NuGet packages to distinguish them, but even adding “native” to search query would still show many .NET-only packages in the list.</p> <p>Nevertheless, after finding the package you want, click on “Install” button and accept confirmation dialogs. After the package is successfully added to the projects, you should be able to build and execute the project without the need for making any more changes to build settings.</p> <div class="admonition note"> <p class=admonition-title>Note</p> <p>A few notes:</p> <ul> <li>NuGet packages are installed per project and not system-wide. The header and binaries for the package are only available to the project it is added to, and not other projects (obviously unless we add the package to those projects as well)</li> <li>One of the many great things about your elegant work is that it is a header-only library, which makes deployment very straightforward. In case of libraries which need binary deployment (<code>.lib</code>, <code>.dll</code> and <code>.pdb</code> for debug info) the different binaries for each supported compiler version must be added to the NuGet package. Some library creators cram binary versions for all supported Visual C++ compiler versions in the same package, so a single package will support all compilers. Some others create a different package for each compiler version (and you usually see things like “v140” or “vc141” in package name to clarify which VC++ compiler this package supports).</li> <li>Packages can have dependency to other packages, and in this case, NuGet will install all dependencies as well as the requested package recursively.</li> </ul> </div> <p><strong>What happens behind the scenes</strong></p> <p>After you add a NuGet package, three changes occur in the project source directory. Of course, we could make these changes manually instead of using GUI:</p> <p><img alt src=../nuget/nuget-project-changes.png></p> <ol> <li> <p>A <code>packages.config</code> file will be created (or updated to include the package name if one such file already exists). This file contains a list of the packages required by this project (name and minimum version) and must be added to the project source code repository, so if you move the source code to a new machine, MSBuild/NuGet knows which packages it has to restore (which it does automatically before each build).</p> <div class=highlight><pre><span></span><code><span class=cp><?xml version="1.0" encoding="utf-8"?></span>
|
||||
<span class=nt><packages></span>
|
||||
<span class=w> </span><span class=nt><package</span><span class=w> </span><span class=na>id=</span><span class=s>"nlohmann.json"</span><span class=w> </span><span class=na>version=</span><span class=s>"3.5.0"</span><span class=w> </span><span class=na>targetFramework=</span><span class=s>"native"</span><span class=w> </span><span class=nt>/></span>
|
||||
<span class=w> </span><span class=nt><package</span><span class=w> </span><span class=na>id=</span><span class=s>"nlohmann.json"</span><span class=w> </span><span class=na>version=</span><span class=s>"3.5.0"</span><span class=w> </span><span class=na>targetFramework=</span><span class=s>"native"</span><span class=w> </span><span class=nt>/></span>
|
||||
<span class=nt></packages></span>
|
||||
</code></pre></div> </li> <li> <p>A <code>packages</code> folder which contains actual files in the packages (these are header and binary files required for a successful build, plus a few metadata files). In case of this library for example, it contains <code>json.hpp</code>:</p> <p><img alt src=../nuget/nuget-package-content.png></p> <div class="admonition note"> <p class=admonition-title>Note</p> <p>This directory should not be added to the project source code repository, as it will be restored before each build by MSBuild/NuGet. If you go ahead and delete this folder, then build the project again, it will magically re-appear!</p> </div> </li> <li> <p>Project MSBuild makefile (which for Visual C++ projects has a .vcxproj extension) will be updated to include settings from the package.</p> <p><img alt src=../nuget/nuget-project-makefile.png></p> <p>The important bit for us here is line 170, which tells MSBuild to import settings from <code>packages\nlohmann.json.3.5.0\build\native\nlohmann.json.targets</code> file. This is a file the package creator created and added to the package (you can see it is one of the two files I created in this repository, the other just contains package attributes like name and version number). What does it contain?</p> <p>For our header-only repository, the only setting we need is to add our include directory to the list of <code>AdditionalIncludeDirectories</code>:</p> <div class=highlight><pre><span></span><code><span class=cp><?xml version="1.0" encoding="utf-8"?></span>
|
||||
<span class=nt><Project</span><span class=w> </span><span class=na>ToolsVersion=</span><span class=s>"4.0"</span><span class=w> </span><span class=na>xmlns=</span><span class=s>"http://schemas.microsoft.com/developer/msbuild/2003"</span><span class=nt>></span>
|
||||
</code></pre></div> </li> <li> <p>A <code>packages</code> folder which contains actual files in the packages (these are header and binary files required for a successful build, plus a few metadata files). In case of this library for example, it contains <code>json.hpp</code>:</p> <p><img alt src=../nuget/nuget-package-content.png></p> <div class="admonition note"> <p class=admonition-title>Note</p> <p>This directory should not be added to the project source code repository, as it will be restored before each build by MSBuild/NuGet. If you go ahead and delete this folder, then build the project again, it will magically re-appear!</p> </div> </li> <li> <p>Project MSBuild makefile (which for Visual C++ projects has a .vcxproj extension) will be updated to include settings from the package.</p> <p><img alt src=../nuget/nuget-project-makefile.png></p> <p>The important bit for us here is line 170, which tells MSBuild to import settings from <code>packages\nlohmann.json.3.5.0\build\native\nlohmann.json.targets</code> file. This is a file the package creator created and added to the package (you can see it is one of the two files I created in this repository, the other just contains package attributes like name and version number). What does it contain?</p> <p>For our header-only repository, the only setting we need is to add our include directory to the list of <code>AdditionalIncludeDirectories</code>:</p> <div class=highlight><pre><span></span><code><span class=cp><?xml version="1.0" encoding="utf-8"?></span>
|
||||
<span class=nt><Project</span><span class=w> </span><span class=na>ToolsVersion=</span><span class=s>"4.0"</span><span class=w> </span><span class=na>xmlns=</span><span class=s>"http://schemas.microsoft.com/developer/msbuild/2003"</span><span class=nt>></span>
|
||||
<span class=w> </span><span class=nt><ItemDefinitionGroup></span>
|
||||
<span class=w> </span><span class=nt><ClCompile></span>
|
||||
<span class=w> </span><span class=nt><AdditionalIncludeDirectories></span>$(MSBuildThisFileDirectory)include;%(AdditionalIncludeDirectories)<span class=nt></AdditionalIncludeDirectories></span>
|
||||
@@ -294,7 +294,7 @@ location: https://pkg.cppget.org/1/stable
|
||||
import nljson = nlohmann-json%lib{json}
|
||||
```
|
||||
|
||||
- then add the library's target as requirement for your target using it, for example:
|
||||
- then add the library's target as requirement for your target using it, for example:
|
||||
```
|
||||
exe{example} : ... $nljson
|
||||
```
|
||||
@@ -330,7 +330,7 @@ location: https://pkg.cppget.org/1/stable
|
||||
|
||||
<span class=nf>exe{example}</span><span class=o>:</span><span class=w> </span>{<span class=n>hxx</span> <span class=n>ixx</span> <span class=n>txx</span> <span class=n>cxx</span>}{**} $<span class=n>libs</span> <span class=n>testscript</span>
|
||||
|
||||
<span class=nv>cxx.poptions</span><span class=w> </span><span class=o>=</span>+<span class=w> </span><span class=s2>"-I</span><span class=nv>$out_root</span><span class=s2>"</span><span class=w> </span><span class=s2>"-I</span><span class=nv>$src_root</span><span class=s2>"</span>
|
||||
<span class=nv>cxx.poptions</span><span class=w> </span><span class=o>=</span>+<span class=w> </span><span class=s2>"-I</span><span class=nv>$out_root</span><span class=s2>"</span><span class=w> </span><span class=s2>"-I</span><span class=nv>$src_root</span><span class=s2>"</span>
|
||||
</code></pre></div> </li> <li> <p><code>example/example/example.cxx</code>: <code>bdep new</code> generates a "hello world" by default, replace it by this:</p> <div class=highlight><span class=filename>example.cxx</span><pre><span></span><code><span class=cp>#include</span><span class=w> </span><span class=cpf><nlohmann/json.hpp></span>
|
||||
<span class=cp>#include</span><span class=w> </span><span class=cpf><iostream></span>
|
||||
<span class=cp>#include</span><span class=w> </span><span class=cpf><iomanip></span>
|
||||
@@ -345,34 +345,34 @@ location: https://pkg.cppget.org/1/stable
|
||||
<span class=o>:</span>
|
||||
<span class=n>$</span><span class=o>*</span><span class=w> </span><span class=o>>>~/</span><span class=n>EOO</span><span class=o>/</span>
|
||||
<span class=p>{</span>
|
||||
<span class=w> </span><span class=s>"compiler"</span><span class=o>:</span><span class=w> </span><span class=p>{</span>
|
||||
<span class=o>/</span><span class=w> </span><span class=s>"c\+\+"</span><span class=o>:</span><span class=w> </span><span class=s>"\d+"</span><span class=p>,</span><span class=o>/</span>
|
||||
<span class=o>/</span><span class=w> </span><span class=s>"family"</span><span class=o>:</span><span class=w> </span><span class=s>"[\w\d]+"</span><span class=p>,</span><span class=o>/</span>
|
||||
<span class=o>/</span><span class=w> </span><span class=s>"version"</span><span class=o>:</span><span class=w> </span><span class=err>\</span><span class=n>d</span><span class=o>+/</span>
|
||||
<span class=w> </span><span class=s>"compiler"</span><span class=o>:</span><span class=w> </span><span class=p>{</span>
|
||||
<span class=o>/</span><span class=w> </span><span class=s>"c\+\+"</span><span class=o>:</span><span class=w> </span><span class=s>"\d+"</span><span class=p>,</span><span class=o>/</span>
|
||||
<span class=o>/</span><span class=w> </span><span class=s>"family"</span><span class=o>:</span><span class=w> </span><span class=s>"[\w\d]+"</span><span class=p>,</span><span class=o>/</span>
|
||||
<span class=o>/</span><span class=w> </span><span class=s>"version"</span><span class=o>:</span><span class=w> </span><span class=err>\</span><span class=n>d</span><span class=o>+/</span>
|
||||
<span class=w> </span><span class=p>},</span>
|
||||
<span class=o>/</span><span class=w> </span><span class=s>"copyright"</span><span class=o>:</span><span class=w> </span><span class=s>"\(C\) 2013-\d+ Niels Lohmann"</span><span class=p>,</span><span class=o>/</span>
|
||||
<span class=w> </span><span class=s>"name"</span><span class=o>:</span><span class=w> </span><span class=s>"JSON for Modern C++"</span><span class=p>,</span>
|
||||
<span class=o>/</span><span class=w> </span><span class=s>"platform"</span><span class=o>:</span><span class=w> </span><span class=s>"[\w\d]+"</span><span class=p>,</span><span class=o>/</span>
|
||||
<span class=w> </span><span class=s>"url"</span><span class=o>:</span><span class=w> </span><span class=s>"https://github.com/nlohmann/json"</span><span class=p>,</span>
|
||||
<span class=w> </span><span class=s>"version"</span><span class=o>:</span><span class=w> </span><span class=p>{</span>
|
||||
<span class=w> </span><span class=s>"major"</span><span class=o>:</span><span class=w> </span><span class=mi>3</span><span class=p>,</span>
|
||||
<span class=o>/</span><span class=w> </span><span class=s>"minor"</span><span class=o>:</span><span class=w> </span><span class=err>\</span><span class=n>d</span><span class=o>+</span><span class=p>,</span><span class=o>/</span>
|
||||
<span class=o>/</span><span class=w> </span><span class=s>"patch"</span><span class=o>:</span><span class=w> </span><span class=err>\</span><span class=n>d</span><span class=o>+</span><span class=p>,</span><span class=o>/</span>
|
||||
<span class=o>/</span><span class=w> </span><span class=s>"string"</span><span class=o>:</span><span class=w> </span><span class=s>"3\.\d+\.\d+"</span><span class=o>/</span>
|
||||
<span class=o>/</span><span class=w> </span><span class=s>"copyright"</span><span class=o>:</span><span class=w> </span><span class=s>"\(C\) 2013-\d+ Niels Lohmann"</span><span class=p>,</span><span class=o>/</span>
|
||||
<span class=w> </span><span class=s>"name"</span><span class=o>:</span><span class=w> </span><span class=s>"JSON for Modern C++"</span><span class=p>,</span>
|
||||
<span class=o>/</span><span class=w> </span><span class=s>"platform"</span><span class=o>:</span><span class=w> </span><span class=s>"[\w\d]+"</span><span class=p>,</span><span class=o>/</span>
|
||||
<span class=w> </span><span class=s>"url"</span><span class=o>:</span><span class=w> </span><span class=s>"https://github.com/nlohmann/json"</span><span class=p>,</span>
|
||||
<span class=w> </span><span class=s>"version"</span><span class=o>:</span><span class=w> </span><span class=p>{</span>
|
||||
<span class=w> </span><span class=s>"major"</span><span class=o>:</span><span class=w> </span><span class=mi>3</span><span class=p>,</span>
|
||||
<span class=o>/</span><span class=w> </span><span class=s>"minor"</span><span class=o>:</span><span class=w> </span><span class=err>\</span><span class=n>d</span><span class=o>+</span><span class=p>,</span><span class=o>/</span>
|
||||
<span class=o>/</span><span class=w> </span><span class=s>"patch"</span><span class=o>:</span><span class=w> </span><span class=err>\</span><span class=n>d</span><span class=o>+</span><span class=p>,</span><span class=o>/</span>
|
||||
<span class=o>/</span><span class=w> </span><span class=s>"string"</span><span class=o>:</span><span class=w> </span><span class=s>"3\.\d+\.\d+"</span><span class=o>/</span>
|
||||
<span class=w> </span><span class=p>}</span>
|
||||
<span class=p>}</span>
|
||||
<span class=n>EOO</span>
|
||||
</code></pre></div> </li> </ul> </li> <li> <p>Initialize the project in a default C/C++ build configuration directory, then build and test:</p> <div class=highlight><pre><span></span><code><span class=nb>cd</span><span class=w> </span>example/
|
||||
|
||||
<span class=c1># create default C/C++ build configuration in ../example-myconfig/, initialize the project in it (downloads it's dependencies in it too)</span>
|
||||
<span class=c1># create default C/C++ build configuration in ../example-myconfig/, initialize the project in it (downloads it's dependencies in it too)</span>
|
||||
bdep<span class=w> </span>init<span class=w> </span>-C<span class=w> </span>@myconfig<span class=w> </span>cc
|
||||
|
||||
<span class=c1># build only,</span>
|
||||
b
|
||||
|
||||
<span class=c1># or build and test the executable's output, will only work if the `testscript` is correct</span>
|
||||
<span class=c1># or build and test the executable's output, will only work if the `testscript` is correct</span>
|
||||
b<span class=w> </span><span class=nb>test</span>
|
||||
</code></pre></div> </li> </ol> </details> <h2 id=cpmcmake>CPM.cmake<a class=headerlink href=#cpmcmake title="Permanent link">¶</a></h2> <div class="admonition abstract"> <p class=admonition-title>Summary</p> <p>package: <strong><code>gh:nlohmann/json</code></strong></p> <ul> <li><span class=twemoji><svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M7.75 6.5a1.25 1.25 0 1 0 0 2.5 1.25 1.25 0 0 0 0-2.5"/><path d="M2.5 1h8.44a1.5 1.5 0 0 1 1.06.44l10.25 10.25a1.5 1.5 0 0 1 0 2.12l-8.44 8.44a1.5 1.5 0 0 1-2.12 0L1.44 12A1.5 1.5 0 0 1 1 10.94V2.5A1.5 1.5 0 0 1 2.5 1m0 1.5v8.44l10.25 10.25 8.44-8.44L10.94 2.5Z"/></svg></span> Available versions: current and previous versions</li> <li><span class=twemoji><svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M20.322.75h1.176a1.75 1.75 0 0 1 1.75 1.749v1.177a10.75 10.75 0 0 1-2.925 7.374l-1.228 1.304a24 24 0 0 1-1.596 1.542v5.038c0 .615-.323 1.184-.85 1.5l-4.514 2.709a.75.75 0 0 1-1.12-.488l-.963-4.572a1.3 1.3 0 0 1-.14-.129L8.04 15.96l-1.994-1.873a1.3 1.3 0 0 1-.129-.14l-4.571-.963a.75.75 0 0 1-.49-1.12l2.71-4.514c.316-.527.885-.85 1.5-.85h5.037a24 24 0 0 1 1.542-1.594l1.304-1.23A10.75 10.75 0 0 1 20.321.75Zm-6.344 4.018v-.001l-1.304 1.23a22.3 22.3 0 0 0-3.255 3.851l-2.193 3.29 1.859 1.744.034.034 1.743 1.858 3.288-2.192a22.3 22.3 0 0 0 3.854-3.257l1.228-1.303a9.25 9.25 0 0 0 2.517-6.346V2.5a.25.25 0 0 0-.25-.25h-1.177a9.25 9.25 0 0 0-6.344 2.518M6.5 21c-1.209 1.209-3.901 1.445-4.743 1.49a.24.24 0 0 1-.18-.067.24.24 0 0 1-.067-.18c.045-.842.281-3.534 1.49-4.743.9-.9 2.6-.9 3.5 0s.9 2.6 0 3.5m-.592-8.588L8.17 9.017q.346-.519.717-1.017H5.066a.25.25 0 0 0-.214.121l-2.167 3.612ZM16 15.112q-.5.372-1.018.718l-3.393 2.262.678 3.223 3.612-2.167a.25.25 0 0 0 .121-.214ZM17.5 8a1.5 1.5 0 1 1-3.001-.001A1.5 1.5 0 0 1 17.5 8"/></svg></span> The package is updated with every release.</li> <li><span class=twemoji><svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M3 3a2 2 0 0 1 2-2h9.982a2 2 0 0 1 1.414.586l4.018 4.018A2 2 0 0 1 21 7.018V21a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2Zm2-.5a.5.5 0 0 0-.5.5v18a.5.5 0 0 0 .5.5h14a.5.5 0 0 0 .5-.5V8.5h-4a2 2 0 0 1-2-2v-4Zm10 0v4a.5.5 0 0 0 .5.5h4a.5.5 0 0 0-.146-.336l-4.018-4.018A.5.5 0 0 0 15 2.5"/></svg></span> File issues at the <a href="https://github.com/cpm-cmake/CPM.cmake/issues">CPM.cmake issue tracker</a></li> <li><span class=twemoji><svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M10.97 8.265a1.45 1.45 0 0 0-.487.57.75.75 0 0 1-1.341-.67c.2-.402.513-.826.997-1.148C10.627 6.69 11.244 6.5 12 6.5c.658 0 1.369.195 1.934.619a2.45 2.45 0 0 1 1.004 2.006c0 1.033-.513 1.72-1.027 2.215-.19.183-.399.358-.579.508l-.147.123a4 4 0 0 0-.435.409v1.37a.75.75 0 1 1-1.5 0v-1.473c0-.237.067-.504.247-.736.22-.28.486-.517.718-.714l.183-.153.001-.001c.172-.143.324-.27.47-.412.368-.355.569-.676.569-1.136a.95.95 0 0 0-.404-.806C12.766 8.118 12.384 8 12 8c-.494 0-.814.121-1.03.265M13 17a1 1 0 1 1-2 0 1 1 0 0 1 2 0"/><path d="M12 1c6.075 0 11 4.925 11 11s-4.925 11-11 11S1 18.075 1 12 5.925 1 12 1M2.5 12a9.5 9.5 0 0 0 9.5 9.5 9.5 9.5 0 0 0 9.5-9.5A9.5 9.5 0 0 0 12 2.5 9.5 9.5 0 0 0 2.5 12"/></svg></span> <a href="https://github.com/cpm-cmake/CPM.cmake">CPM.cmake website</a></li> </ul> </div> <p>If you are using <a href="https://github.com/TheLartians/CPM.cmake"><code>CPM.cmake</code></a>, add the <a href="https://github.com/TheLartians/CPM.cmake#adding-cpm">CPM.cmake script</a> and the following snippet to your CMake project:</p> <div class=highlight><pre><span></span><code><span class=nb>CPMAddPackage</span><span class=p>(</span><span class=s2>"gh:nlohmann/json@3.12.0"</span><span class=p>)</span>
|
||||
</code></pre></div> </li> </ol> </details> <h2 id=cpmcmake>CPM.cmake<a class=headerlink href=#cpmcmake title="Permanent link">¶</a></h2> <div class="admonition abstract"> <p class=admonition-title>Summary</p> <p>package: <strong><code>gh:nlohmann/json</code></strong></p> <ul> <li><span class=twemoji><svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M7.75 6.5a1.25 1.25 0 1 0 0 2.5 1.25 1.25 0 0 0 0-2.5"/><path d="M2.5 1h8.44a1.5 1.5 0 0 1 1.06.44l10.25 10.25a1.5 1.5 0 0 1 0 2.12l-8.44 8.44a1.5 1.5 0 0 1-2.12 0L1.44 12A1.5 1.5 0 0 1 1 10.94V2.5A1.5 1.5 0 0 1 2.5 1m0 1.5v8.44l10.25 10.25 8.44-8.44L10.94 2.5Z"/></svg></span> Available versions: current and previous versions</li> <li><span class=twemoji><svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M20.322.75h1.176a1.75 1.75 0 0 1 1.75 1.749v1.177a10.75 10.75 0 0 1-2.925 7.374l-1.228 1.304a24 24 0 0 1-1.596 1.542v5.038c0 .615-.323 1.184-.85 1.5l-4.514 2.709a.75.75 0 0 1-1.12-.488l-.963-4.572a1.3 1.3 0 0 1-.14-.129L8.04 15.96l-1.994-1.873a1.3 1.3 0 0 1-.129-.14l-4.571-.963a.75.75 0 0 1-.49-1.12l2.71-4.514c.316-.527.885-.85 1.5-.85h5.037a24 24 0 0 1 1.542-1.594l1.304-1.23A10.75 10.75 0 0 1 20.321.75Zm-6.344 4.018v-.001l-1.304 1.23a22.3 22.3 0 0 0-3.255 3.851l-2.193 3.29 1.859 1.744.034.034 1.743 1.858 3.288-2.192a22.3 22.3 0 0 0 3.854-3.257l1.228-1.303a9.25 9.25 0 0 0 2.517-6.346V2.5a.25.25 0 0 0-.25-.25h-1.177a9.25 9.25 0 0 0-6.344 2.518M6.5 21c-1.209 1.209-3.901 1.445-4.743 1.49a.24.24 0 0 1-.18-.067.24.24 0 0 1-.067-.18c.045-.842.281-3.534 1.49-4.743.9-.9 2.6-.9 3.5 0s.9 2.6 0 3.5m-.592-8.588L8.17 9.017q.346-.519.717-1.017H5.066a.25.25 0 0 0-.214.121l-2.167 3.612ZM16 15.112q-.5.372-1.018.718l-3.393 2.262.678 3.223 3.612-2.167a.25.25 0 0 0 .121-.214ZM17.5 8a1.5 1.5 0 1 1-3.001-.001A1.5 1.5 0 0 1 17.5 8"/></svg></span> The package is updated with every release.</li> <li><span class=twemoji><svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M3 3a2 2 0 0 1 2-2h9.982a2 2 0 0 1 1.414.586l4.018 4.018A2 2 0 0 1 21 7.018V21a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2Zm2-.5a.5.5 0 0 0-.5.5v18a.5.5 0 0 0 .5.5h14a.5.5 0 0 0 .5-.5V8.5h-4a2 2 0 0 1-2-2v-4Zm10 0v4a.5.5 0 0 0 .5.5h4a.5.5 0 0 0-.146-.336l-4.018-4.018A.5.5 0 0 0 15 2.5"/></svg></span> File issues at the <a href="https://github.com/cpm-cmake/CPM.cmake/issues">CPM.cmake issue tracker</a></li> <li><span class=twemoji><svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M10.97 8.265a1.45 1.45 0 0 0-.487.57.75.75 0 0 1-1.341-.67c.2-.402.513-.826.997-1.148C10.627 6.69 11.244 6.5 12 6.5c.658 0 1.369.195 1.934.619a2.45 2.45 0 0 1 1.004 2.006c0 1.033-.513 1.72-1.027 2.215-.19.183-.399.358-.579.508l-.147.123a4 4 0 0 0-.435.409v1.37a.75.75 0 1 1-1.5 0v-1.473c0-.237.067-.504.247-.736.22-.28.486-.517.718-.714l.183-.153.001-.001c.172-.143.324-.27.47-.412.368-.355.569-.676.569-1.136a.95.95 0 0 0-.404-.806C12.766 8.118 12.384 8 12 8c-.494 0-.814.121-1.03.265M13 17a1 1 0 1 1-2 0 1 1 0 0 1 2 0"/><path d="M12 1c6.075 0 11 4.925 11 11s-4.925 11-11 11S1 18.075 1 12 5.925 1 12 1M2.5 12a9.5 9.5 0 0 0 9.5 9.5 9.5 9.5 0 0 0 9.5-9.5A9.5 9.5 0 0 0 12 2.5 9.5 9.5 0 0 0 2.5 12"/></svg></span> <a href="https://github.com/cpm-cmake/CPM.cmake">CPM.cmake website</a></li> </ul> </div> <p>If you are using <a href="https://github.com/TheLartians/CPM.cmake"><code>CPM.cmake</code></a>, add the <a href="https://github.com/TheLartians/CPM.cmake#adding-cpm">CPM.cmake script</a> and the following snippet to your CMake project:</p> <div class=highlight><pre><span></span><code><span class=nb>CPMAddPackage</span><span class=p>(</span><span class=s2>"gh:nlohmann/json@3.12.0"</span><span class=p>)</span>
|
||||
</code></pre></div> <details class=example> <summary>Example</summary> <ol> <li> <p>Create the following files:</p> <div class=highlight><span class=filename>example.cpp</span><pre><span></span><code><span class=cp>#include</span><span class=w> </span><span class=cpf><nlohmann/json.hpp></span>
|
||||
<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>
|
||||
@@ -388,7 +388,7 @@ b<span class=w> </span><span class=nb>test</span>
|
||||
|
||||
<span class=nb>include</span><span class=p>(</span><span class=o>${</span><span class=nv>CMAKE_SOURCE_DIR</span><span class=o>}</span><span class=s>/cmake/CPM.cmake</span><span class=p>)</span>
|
||||
|
||||
<span class=nb>CPMAddPackage</span><span class=p>(</span><span class=s2>"gh:nlohmann/json@3.12.0"</span><span class=p>)</span>
|
||||
<span class=nb>CPMAddPackage</span><span class=p>(</span><span class=s2>"gh:nlohmann/json@3.12.0"</span><span class=p>)</span>
|
||||
|
||||
<span class=nb>add_executable</span><span class=p>(</span><span class=s>json_example</span><span class=w> </span><span class=s>example.cpp</span><span class=p>)</span>
|
||||
<span class=nb>target_link_libraries</span><span class=p>(</span><span class=s>json_example</span><span class=w> </span><span class=s>PRIVATE</span><span class=w> </span><span class=s>nlohmann_json::nlohmann_json</span><span class=p>)</span>
|
||||
@@ -406,14 +406,14 @@ cmake<span class=w> </span>--build<span class=w> </span>build
|
||||
<span class=p>{</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>4</span><span class=p>)</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>meta</span><span class=p>()</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>endl</span><span class=p>;</span>
|
||||
<span class=p>}</span>
|
||||
</code></pre></div> <div class=highlight><span class=filename>xmake.lua</span><pre><span></span><code><span class=nf>add_requires</span><span class=p>(</span><span class=s2>"nlohmann_json"</span><span class=p>)</span>
|
||||
</code></pre></div> <div class=highlight><span class=filename>xmake.lua</span><pre><span></span><code><span class=nf>add_requires</span><span class=p>(</span><span class=s2>"nlohmann_json"</span><span class=p>)</span>
|
||||
|
||||
<span class=nf>add_rules</span><span class=p>(</span><span class=s2>"mode.debug"</span><span class=p>,</span><span class=w> </span><span class=s2>"mode.release"</span><span class=p>)</span>
|
||||
<span class=nf>target</span><span class=p>(</span><span class=s2>"xm"</span><span class=p>)</span>
|
||||
<span class=w> </span><span class=nf>set_kind</span><span class=p>(</span><span class=s2>"binary"</span><span class=p>)</span>
|
||||
<span class=w> </span><span class=nf>add_files</span><span class=p>(</span><span class=s2>"example.cpp"</span><span class=p>)</span>
|
||||
<span class=w> </span><span class=nf>add_packages</span><span class=p>(</span><span class=s2>"nlohmann_json"</span><span class=p>)</span>
|
||||
<span class=w> </span><span class=nf>set_languages</span><span class=p>(</span><span class=s2>"cxx11"</span><span class=p>)</span>
|
||||
<span class=nf>add_rules</span><span class=p>(</span><span class=s2>"mode.debug"</span><span class=p>,</span><span class=w> </span><span class=s2>"mode.release"</span><span class=p>)</span>
|
||||
<span class=nf>target</span><span class=p>(</span><span class=s2>"xm"</span><span class=p>)</span>
|
||||
<span class=w> </span><span class=nf>set_kind</span><span class=p>(</span><span class=s2>"binary"</span><span class=p>)</span>
|
||||
<span class=w> </span><span class=nf>add_files</span><span class=p>(</span><span class=s2>"example.cpp"</span><span class=p>)</span>
|
||||
<span class=w> </span><span class=nf>add_packages</span><span class=p>(</span><span class=s2>"nlohmann_json"</span><span class=p>)</span>
|
||||
<span class=w> </span><span class=nf>set_languages</span><span class=p>(</span><span class=s2>"cxx11"</span><span class=p>)</span>
|
||||
</code></pre></div> </li> <li> <p>Build</p> <div class=highlight><pre><span></span><code>xmake
|
||||
</code></pre></div> </li> <li> <p>Run</p> <div class=highlight><pre><span></span><code>xmake<span class=w> </span>run
|
||||
</code></pre></div> </li> </ol> </details> <hr> <h2 id=other-package-managers>Other package managers<a class=headerlink href=#other-package-managers title="Permanent link">¶</a></h2> <p>The library is also contained in many other package repositories: <a href="https://repology.org/project/nlohmann-json/versions"><img alt="Packaging status" src="../../assets/external/repology.org/badge/tiny-repos/nlohmann-json.svg"></a></p> <details class=example> <summary>Package version overview</summary> <p><a href="https://repology.org/project/nlohmann-json/versions"><img alt="Packaging status" src="../../assets/external/repology.org/badge/vertical-allrepos/nlohmann-json.svg"></a></p> </details> <hr> <h2 id=buckaroo>Buckaroo<a class=headerlink href=#buckaroo title="Permanent link">¶</a></h2> <p>If you are using <a href="https://buckaroo.pm">Buckaroo</a>, you can install this library's module with <code>buckaroo add github.com/buckaroo-pm/nlohmann-json</code>. There is a demo repo <a href="https://github.com/njlr/buckaroo-nholmann-json-example">here</a>.</p> <div class="admonition warning"> <p class=admonition-title>Warning</p> <p>The module is outdated as the respective <a href="https://github.com/buckaroo-pm/nlohmann-json">repository</a> has not been updated in years.</p> </div> <h2 id=cocoapods>CocoaPods<a class=headerlink href=#cocoapods title="Permanent link">¶</a></h2> <p>If you are using <a href="https://cocoapods.org">CocoaPods</a>, you can use the library by adding pod <code>"nlohmann_json", '~>3.1.2'</code> to your podfile (see <a href="https://bitbucket.org/benman/nlohmann_json-cocoapod/src/master/">an example</a>). Please file issues <a href="https://bitbucket.org/benman/nlohmann_json-cocoapod/issues?status=new&status=open">here</a>.</p> <h2 id=npm>npm<a class=headerlink href=#npm title="Permanent link">¶</a></h2> <p>This project does not publish an official <a href="https://www.npmjs.com">npm</a> package. The npm package <a href="https://www.npmjs.com/package/nlohmann-json"><code>nlohmann-json</code></a> (or similarly named packages) is not maintained or endorsed by this project. Use one of the package managers listed above, or integrate the single header directly.</p> <h2 id=esp-idf-and-platformio>ESP-IDF and PlatformIO<a class=headerlink href=#esp-idf-and-platformio title="Permanent link">¶</a></h2> <p>There is no official package published to the <a href="https://components.espressif.com">ESP-IDF Component Registry</a> or the <a href="https://registry.platformio.org">PlatformIO Registry</a>. A community-maintained fork, <a href="https://github.com/Johboh/nlohmann-json">Johboh/nlohmann-json</a>, publishes this library to both registries on each new release and can be used as an unofficial component/package for ESP-IDF and PlatformIO projects. As the library is header-only, it can otherwise be used directly by adding its <code>include/</code> directory to your component's/project's include paths, like any other integration method described on this page.</p> <p><img alt src="../../assets/external/img.shields.io/cocoapods/v/nlohmann_json.svg"></p> <div class="admonition warning"> <p class=admonition-title>Warning</p> <p>The module is outdated as the respective <a href="https://cocoapods.org/pods/nlohmann_json">pod</a> has not been updated in years.</p> </div> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="August 7, 2026 17:29:58 UTC">August 7, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=Line truncated
|
||||
</code></pre></div> </li> </ol> </details> <hr> <h2 id=other-package-managers>Other package managers<a class=headerlink href=#other-package-managers title="Permanent link">¶</a></h2> <p>The library is also contained in many other package repositories: <a href="https://repology.org/project/nlohmann-json/versions"><img alt="Packaging status" src="../../assets/external/repology.org/badge/tiny-repos/nlohmann-json.svg"></a></p> <details class=example> <summary>Package version overview</summary> <p><a href="https://repology.org/project/nlohmann-json/versions"><img alt="Packaging status" src="../../assets/external/repology.org/badge/vertical-allrepos/nlohmann-json.svg"></a></p> </details> <hr> <h2 id=buckaroo>Buckaroo<a class=headerlink href=#buckaroo title="Permanent link">¶</a></h2> <p>If you are using <a href="https://buckaroo.pm">Buckaroo</a>, you can install this library's module with <code>buckaroo add github.com/buckaroo-pm/nlohmann-json</code>. There is a demo repo <a href="https://github.com/njlr/buckaroo-nholmann-json-example">here</a>.</p> <div class="admonition warning"> <p class=admonition-title>Warning</p> <p>The module is outdated as the respective <a href="https://github.com/buckaroo-pm/nlohmann-json">repository</a> has not been updated in years.</p> </div> <h2 id=cocoapods>CocoaPods<a class=headerlink href=#cocoapods title="Permanent link">¶</a></h2> <p>If you are using <a href="https://cocoapods.org">CocoaPods</a>, you can use the library by adding pod <code>"nlohmann_json", '~>3.1.2'</code> to your podfile (see <a href="https://bitbucket.org/benman/nlohmann_json-cocoapod/src/master/">an example</a>). Please file issues <a href="https://bitbucket.org/benman/nlohmann_json-cocoapod/issues?status=new&status=open">here</a>.</p> <h2 id=npm>npm<a class=headerlink href=#npm title="Permanent link">¶</a></h2> <p>This project does not publish an official <a href="https://www.npmjs.com">npm</a> package. The npm package <a href="https://www.npmjs.com/package/nlohmann-json"><code>nlohmann-json</code></a> (or similarly named packages) is not maintained or endorsed by this project. Use one of the package managers listed above, or integrate the single header directly.</p> <h2 id=esp-idf-and-platformio>ESP-IDF and PlatformIO<a class=headerlink href=#esp-idf-and-platformio title="Permanent link">¶</a></h2> <p>There is no official package published to the <a href="https://components.espressif.com">ESP-IDF Component Registry</a> or the <a href="https://registry.platformio.org">PlatformIO Registry</a>. A community-maintained fork, <a href="https://github.com/Johboh/nlohmann-json">Johboh/nlohmann-json</a>, publishes this library to both registries on each new release and can be used as an unofficial component/package for ESP-IDF and PlatformIO projects. As the library is header-only, it can otherwise be used directly by adding its <code>include/</code> directory to your component's/project's include paths, like any other integration method described on this page.</p> <p><img alt src="../../assets/external/img.shields.io/cocoapods/v/nlohmann_json.svg"></p> <div class="admonition warning"> <p class=admonition-title>Warning</p> <p>The module is outdated as the respective <a href="https://cocoapods.org/pods/nlohmann_json">pod</a> has not been updated in years.</p> </div> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="August 19, 2026 18:19:47 UTC">August 19, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div clasLine truncated
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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=author content="Niels Lohmann"><link href="https://json.nlohmann.me/integration/pkg-config/" rel="canonical"><link href=../package_managers/ rel=prev><link href=../../api/basic_json/ rel=next><link rel=icon href=../../assets/images/favicon.png><meta name=generator content="mkdocs-1.6.1, mkdocs-material-9.7.7"><title>Pkg-config - JSON for Modern C++</title><link rel=stylesheet href=../../assets/stylesheets/main.ec1eaa64.min.css><link rel=stylesheet href=../../assets/stylesheets/palette.ab4e12ef.min.css><link rel="stylesheet" href="../../assets/external/fonts.googleapis.com/css.61a430c9.css"><style>:root{--md-text-font:"Roboto";--md-code-font:"JetBrains Mono"}</style><link rel=stylesheet href=../../css/custom.css><script>__md_scope=new 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6.52 0 0 1 9.5 16 6.5 6.5 0 0 1 3 9.5 6.5 6.5 0 0 1 9.5 3m0 2C7 5 5 7 5 9.5S7 14 9.5 14 14 12 14 9.5 12 5 9.5 5"/></svg> </label> <div cLine truncated
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</code></pre></div> <p>Users of the <a href=../package_managers/#meson>Meson build system</a> will also be able to use a system-wide library, which will be found by <code>pkg-config</code>:</p> <div class=highlight><pre><span></span><code><span class=n>json</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=nb>dependency</span><span class=p>(</span><span class=s>'nlohmann_json'</span><span class=p>,</span><span class=w> </span><span class=n>required</span><span class=p>:</span><span class=w> </span><span class=kc>true</span><span class=p>)</span>
|
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</code></pre></div> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="August 7, 2026 17:29:58 UTC">August 7, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - 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|
||||
</code></pre></div> <p>Users of the <a href=../package_managers/#meson>Meson build system</a> will also be able to use a system-wide library, which will be found by <code>pkg-config</code>:</p> <div class=highlight><pre><span></span><code><span class=n>json</span><span class=w> </span><span class=o>=</span><span class=w> </span><span class=nb>dependency</span><span class=p>(</span><span class=s>'nlohmann_json'</span><span class=p>,</span><span class=w> </span><span class=n>required</span><span class=p>:</span><span class=w> </span><span class=kc>true</span><span class=p>)</span>
|
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</code></pre></div> <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary --> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date" title="August 19, 2026 18:19:47 UTC">August 19, 2026</span> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> <div class=md-copyright__highlight> Copyright © 2013-2026 Niels Lohmann </div> </div> <div class=md-social> <a href="https://github.com/nlohmann" target="_blank" rel="noopener" title="github.com" class="md-social__link"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 512 512"><!-- Font Awesome Free 7.1.0 by @fontawesome - 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