devdocs/c/string%2Fmultibyte%2Fchar32_t.html


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    <h1 id="firstHeading" class="firstHeading">char32_t</h1>            <table class="t-dcl-begin"> <tr class="t-dsc-header"> <th> Defined in header <code>&lt;uchar.h&gt;</code> </th> <th> </th> <th> </th> </tr> <tr class="t-dcl t-since-c11"> <td> <pre data-language="c">typedef uint_least32_t char32_t;</pre>
</td> <td class="t-dcl-nopad"> </td> <td> <span class="t-mark-rev t-since-c11">(since C11)</span> </td> </tr>  </table> <p><code>char32_t</code> is an unsigned integer type used for 32-bit wide characters and is the same type as <code><a href="http://en.cppreference.com/w/c/types/integer"><span class="kw130">uint_least32_t</span></a></code>.</p>
<h3 id="Notes"> Notes</h3> <p>On any given platform, by the definition of <code><a href="http://en.cppreference.com/w/c/types/integer"><span class="kw130">uint_least32_t</span></a></code>, the width of type <code>char32_t</code> can be greater than 32 bits, but the actual values stored in an object of type <code>char32_t</code> will always have a width of 32 bits.</p>
<h3 id="Example"> Example</h3> <div class="t-example"> <div class="c source-c"><pre data-language="c">#include &lt;stdio.h&gt;
#include &lt;uchar.h&gt;
 
int main(void)
{
    const char32_t wc[] = U"zß水🍌"; // or "z\u00df\u6c34\U0001f34c"
    const size_t wc_sz = sizeof wc / sizeof *wc;
    printf("%zu UTF-32 code units: [ ", wc_sz);
    for (size_t n = 0; n &lt; wc_sz; ++n)
        printf("%#x ", wc[n]);
    printf("]\n");
}</pre></div> <p>Possible output:</p>
<div class="text source-text"><pre data-language="c">5 UTF-32 code units: [ 0x7a 0xdf 0x6c34 0x1f34c 0 ]</pre></div> </div> <h3 id="References"> References</h3>  <ul>
<li> C17 standard (ISO/IEC 9899:2018): </li>
<ul>
<li> 7.28 Unicode utilities &lt;uchar.h&gt; (p: 292) </li>
<li> 7.20.1.2 Minimum-width integer types (p: 212-213) </li>
</ul>
<li> C11 standard (ISO/IEC 9899:2011): </li>
<ul>
<li> 7.28 Unicode utilities &lt;uchar.h&gt; (p: 398) </li>
<li> 7.20.1.2 Minimum-width integer types (p: 290) </li>
</ul>
<li> C99 standard (ISO/IEC 9899:1999): </li>
<ul><li> 7.18.1.2 Minimum-width integer types (p: 256) </li></ul>
</ul>             <h3 id="See_also"> See also</h3> <table class="t-dsc-begin"> <tr class="t-dsc"> <td colspan="2"> <span><a href="https://en.cppreference.com/w/cpp/language/types" title="cpp/language/types">C++ documentation</a></span> for <span class=""><span>Fundamental types</span></span> </td>
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