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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: 'copy', 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=''>copy</a></span><span class='out-of-band'><span id='render-detail'>
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</span><a id='src-5476' class='srclink' href='https://doc.rust-lang.org/nightly/core/intrinsics//fn.copy.html?gotosrc=5476' title='goto source code'>[src]</a></span></h1>
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<pre class='rust fn'>pub unsafe extern "rust-intrinsic" fn copy<T>(src: <a class='primitive' href='https://doc.rust-lang.org/nightly/bitflags/primitive.pointer.html'>*const T</a>, dst: <a class='primitive' href='https://doc.rust-lang.org/nightly/bitflags/primitive.pointer.html'>*mut T</a>, count: <a class='primitive' href='https://doc.rust-lang.org/nightly/bitflags/primitive.usize.html'>usize</a>)</pre><span class="since">1.0.0</span><div class='docblock'><p>Copies <code>count * size_of<T></code> bytes from <code>src</code> to <code>dst</code>. The source
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and destination may overlap.</p>
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<p><code>copy</code> is semantically equivalent to C's <code>memmove</code>.</p>
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<h1 id='safety' class='section-header'><a href='#safety'>Safety</a></h1>
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<p>Care must be taken with the ownership of <code>src</code> and <code>dst</code>.
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This method semantically moves the values of <code>src</code> into <code>dst</code>.
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However it does not drop the contents of <code>dst</code>, or prevent the contents of <code>src</code>
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from being dropped or used.</p>
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<h1 id='examples' class='section-header'><a href='#examples'>Examples</a></h1>
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<p>Efficiently create a Rust vector from an unsafe buffer:</p>
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<pre class='rust rust-example-rendered'>
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<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>ptr</span>;
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<span class='kw'>unsafe</span> <span class='kw'>fn</span> <span class='ident'>from_buf_raw</span><span class='op'><</span><span class='ident'>T</span><span class='op'>></span>(<span class='ident'>ptr</span>: <span class='op'>*</span><span class='kw'>const</span> <span class='ident'>T</span>, <span class='ident'>elts</span>: <span class='ident'>usize</span>) <span class='op'>-></span> <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>T</span><span class='op'>></span> {
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<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>dst</span> <span class='op'>=</span> <span class='ident'>Vec</span>::<span class='ident'>with_capacity</span>(<span class='ident'>elts</span>);
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<span class='ident'>dst</span>.<span class='ident'>set_len</span>(<span class='ident'>elts</span>);
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<span class='ident'>ptr</span>::<span class='ident'>copy</span>(<span class='ident'>ptr</span>, <span class='ident'>dst</span>.<span class='ident'>as_mut_ptr</span>(), <span class='ident'>elts</span>);
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<span class='ident'>dst</span>
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