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<p class='location'><a href='../../index.html'>bitflags</a>::<wbr><a href='../index.html'>__core</a>::<wbr><a href='index.html'>ptr</a></p><script>window.sidebarCurrent = {name: 'write', ty: 'fn', relpath: ''};</script><script defer src="sidebar-items.js"></script>
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<h1 class='fqn'><span class='in-band'>Function <a href='../../index.html'>bitflags</a>::<wbr><a href='../index.html'>__core</a>::<wbr><a href='index.html'>ptr</a>::<wbr><a class='fn' href=''>write</a></span><span class='out-of-band'><span id='render-detail'>
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<pre class='rust fn'>pub unsafe fn write<T>(dst: <a class='primitive' href='https://doc.rust-lang.org/nightly/bitflags/primitive.pointer.html'>*mut T</a>, src: T)</pre><span class="since">1.0.0</span><div class='docblock'><p>Overwrites a memory location with the given value without reading or
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dropping the old value.</p>
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<h1 id='safety' class='section-header'><a href='#safety'>Safety</a></h1>
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<p>This operation is marked unsafe because it accepts a raw pointer.</p>
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<p>It does not drop the contents of <code>dst</code>. This is safe, but it could leak
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<p>This is appropriate for initializing uninitialized memory, or overwriting
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memory that has previously been <code>read</code> from.</p>
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<p>Basic usage:</p>
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<pre class='rust rust-example-rendered'>
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<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>x</span> <span class='op'>=</span> <span class='number'>0</span>;
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<span class='kw'>let</span> <span class='ident'>y</span> <span class='op'>=</span> <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>x</span> <span class='kw'>as</span> <span class='op'>*</span><span class='kw-2'>mut</span> <span class='ident'>i32</span>;
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<span class='kw'>let</span> <span class='ident'>z</span> <span class='op'>=</span> <span class='number'>12</span>;
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<span class='kw'>unsafe</span> {
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<span class='ident'>std</span>::<span class='ident'>ptr</span>::<span class='ident'>write</span>(<span class='ident'>y</span>, <span class='ident'>z</span>);
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<span class='macro'>println</span><span class='macro'>!</span>(<span class='string'>"{}"</span>, <span class='ident'>std</span>::<span class='ident'>ptr</span>::<span class='ident'>read</span>(<span class='ident'>y</span>));
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