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<section id='main' class="content trait">
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<h1 class='fqn'><span class='in-band'>Trait <a href='../../index.html'>bitflags</a>::<wbr><a href='../index.html'>__core</a>::<wbr><a href='index.html'>ops</a>::<wbr><a class='trait' href=''>AddAssign</a></span><span class='out-of-band'><span id='render-detail'>
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[<span class='inner'>−</span>]
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</span><a id='src-20284' class='srclink' href='https://doc.rust-lang.org/nightly/core/ops/trait.AddAssign.html?gotosrc=20284' title='goto source code'>[src]</a></span></h1>
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<pre class='rust trait'>pub trait AddAssign<Rhs = Self> {
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fn <a href='#tymethod.add_assign' class='fnname'>add_assign</a>(&mut self, Rhs);
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}</pre><div class='docblock'><p>The <code>AddAssign</code> trait is used to specify the functionality of <code>+=</code>.</p>
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<h1 id='examples' class='section-header'><a href='#examples'>Examples</a></h1>
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<p>A trivial implementation of <code>AddAssign</code>. When <code>Foo += Foo</code> happens, it ends up
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calling <code>add_assign</code>, and therefore, <code>main</code> prints <code>Adding!</code>.</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'>ops</span>::<span class='ident'>AddAssign</span>;
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<span class='kw'>struct</span> <span class='ident'>Foo</span>;
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<span class='kw'>impl</span> <span class='ident'>AddAssign</span> <span class='kw'>for</span> <span class='ident'>Foo</span> {
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<span class='kw'>fn</span> <span class='ident'>add_assign</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>_rhs</span>: <span class='ident'>Foo</span>) {
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<span class='macro'>println</span><span class='macro'>!</span>(<span class='string'>"Adding!"</span>);
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}
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}
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<span class='kw'>fn</span> <span class='ident'>main</span>() {
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<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>foo</span> <span class='op'>=</span> <span class='ident'>Foo</span>;
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<span class='ident'>foo</span> <span class='op'>+=</span> <span class='ident'>Foo</span>;
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}</pre>
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<h2 id='required-methods'>Required Methods</h2>
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<div class='methods'>
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<h3 id='tymethod.add_assign' class='method stab '><code>fn <a href='#tymethod.add_assign' class='fnname'>add_assign</a>(&mut self, Rhs)</code></h3><div class='docblock'><p>The method for the <code>+=</code> operator</p>
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</div></div>
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<h2 id='implementors'>Implementors</h2>
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<ul class='item-list' id='implementors-list'>
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<li><code>impl AddAssign for <a class='primitive' href='https://doc.rust-lang.org/nightly/bitflags/primitive.f64.html'>f64</a></code></li>
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<li><code>impl AddAssign for <a class='primitive' href='https://doc.rust-lang.org/nightly/bitflags/primitive.f32.html'>f32</a></code></li>
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<li><code>impl AddAssign for <a class='primitive' href='https://doc.rust-lang.org/nightly/bitflags/primitive.i64.html'>i64</a></code></li>
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<li><code>impl AddAssign for <a class='primitive' href='https://doc.rust-lang.org/nightly/bitflags/primitive.i32.html'>i32</a></code></li>
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<li><code>impl AddAssign for <a class='primitive' href='https://doc.rust-lang.org/nightly/bitflags/primitive.i16.html'>i16</a></code></li>
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<li><code>impl AddAssign for <a class='primitive' href='https://doc.rust-lang.org/nightly/bitflags/primitive.i8.html'>i8</a></code></li>
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<li><code>impl AddAssign for <a class='primitive' href='https://doc.rust-lang.org/nightly/bitflags/primitive.isize.html'>isize</a></code></li>
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<li><code>impl AddAssign for <a class='primitive' href='https://doc.rust-lang.org/nightly/bitflags/primitive.u64.html'>u64</a></code></li>
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<li><code>impl AddAssign for <a class='primitive' href='https://doc.rust-lang.org/nightly/bitflags/primitive.u32.html'>u32</a></code></li>
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<li><code>impl AddAssign for <a class='primitive' href='https://doc.rust-lang.org/nightly/bitflags/primitive.u16.html'>u16</a></code></li>
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<li><code>impl AddAssign for <a class='primitive' href='https://doc.rust-lang.org/nightly/bitflags/primitive.u8.html'>u8</a></code></li>
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<li><code>impl AddAssign for <a class='primitive' href='https://doc.rust-lang.org/nightly/bitflags/primitive.usize.html'>usize</a></code></li>
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<li><code>impl AddAssign for <a class='struct' href='../../../bitflags/__core/num/struct.Wrapping.html' title='bitflags::__core::num::Wrapping'>Wrapping</a><<a class='primitive' href='https://doc.rust-lang.org/nightly/bitflags/primitive.i64.html'>i64</a>></code></li>
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<li><code>impl AddAssign for <a class='struct' href='../../../bitflags/__core/num/struct.Wrapping.html' title='bitflags::__core::num::Wrapping'>Wrapping</a><<a class='primitive' href='https://doc.rust-lang.org/nightly/bitflags/primitive.i32.html'>i32</a>></code></li>
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<li><code>impl AddAssign for <a class='struct' href='../../../bitflags/__core/num/struct.Wrapping.html' title='bitflags::__core::num::Wrapping'>Wrapping</a><<a class='primitive' href='https://doc.rust-lang.org/nightly/bitflags/primitive.i16.html'>i16</a>></code></li>
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<li><code>impl AddAssign for <a class='struct' href='../../../bitflags/__core/num/struct.Wrapping.html' title='bitflags::__core::num::Wrapping'>Wrapping</a><<a class='primitive' href='https://doc.rust-lang.org/nightly/bitflags/primitive.i8.html'>i8</a>></code></li>
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<li><code>impl AddAssign for <a class='struct' href='../../../bitflags/__core/num/struct.Wrapping.html' title='bitflags::__core::num::Wrapping'>Wrapping</a><<a class='primitive' href='https://doc.rust-lang.org/nightly/bitflags/primitive.isize.html'>isize</a>></code></li>
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<li><code>impl AddAssign for <a class='struct' href='../../../bitflags/__core/num/struct.Wrapping.html' title='bitflags::__core::num::Wrapping'>Wrapping</a><<a class='primitive' href='https://doc.rust-lang.org/nightly/bitflags/primitive.u64.html'>u64</a>></code></li>
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<li><code>impl AddAssign for <a class='struct' href='../../../bitflags/__core/num/struct.Wrapping.html' title='bitflags::__core::num::Wrapping'>Wrapping</a><<a class='primitive' href='https://doc.rust-lang.org/nightly/bitflags/primitive.u32.html'>u32</a>></code></li>
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<li><code>impl AddAssign for <a class='struct' href='../../../bitflags/__core/num/struct.Wrapping.html' title='bitflags::__core::num::Wrapping'>Wrapping</a><<a class='primitive' href='https://doc.rust-lang.org/nightly/bitflags/primitive.u16.html'>u16</a>></code></li>
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<li><code>impl AddAssign for <a class='struct' href='../../../bitflags/__core/num/struct.Wrapping.html' title='bitflags::__core::num::Wrapping'>Wrapping</a><<a class='primitive' href='https://doc.rust-lang.org/nightly/bitflags/primitive.u8.html'>u8</a>></code></li>
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<li><code>impl AddAssign for <a class='struct' href='../../../bitflags/__core/num/struct.Wrapping.html' title='bitflags::__core::num::Wrapping'>Wrapping</a><<a class='primitive' href='https://doc.rust-lang.org/nightly/bitflags/primitive.usize.html'>usize</a>></code></li>
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