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<p class='location'>Trait Pointer</p><div class="block items"><ul><li><a href="#required-methods">Required Methods</a></li><li><a href="#implementors">Implementors</a></li></ul></div><p class='location'><a href='../index.html'>core</a>::<wbr><a href='index.html'>fmt</a></p><script>window.sidebarCurrent = {name: 'Pointer', ty: 'trait', relpath: ''};</script><script defer src="sidebar-items.js"></script>
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<h1 class='fqn'><span class='in-band'>Trait <a href='../index.html'>core</a>::<wbr><a href='index.html'>fmt</a>::<wbr><a class="trait" href=''>Pointer</a></span><span class='out-of-band'><span class='since' title='Stable since Rust version 1.0.0'>1.0.0</span><span id='render-detail'>
<a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">
[<span class='inner'>−</span>]
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</span><a class='srclink' href='../../src/core/fmt/mod.rs.html#808-812' title='goto source code'>[src]</a></span></h1>
<pre class='rust trait'>pub trait Pointer {
fn <a href='#tymethod.fmt' class='fnname'>fmt</a>(&self, f: &mut <a class="struct" href="../../core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a>) -> <a class="type" href="../../core/fmt/type.Result.html" title="type core::fmt::Result">Result</a>;
}</pre><div class='docblock'><p>Format trait for the <code>p</code> character.</p>
<p>The <code>Pointer</code> trait should format its output as a memory location. This is commonly presented
as hexadecimal.</p>
<p>For more information on formatters, see <a href="../../std/fmt/index.html">the module-level documentation</a>.</p>
<h1 id='examples' class='section-header'><a href='#examples'>Examples</a></h1>
<p>Basic usage with <code>&i32</code>:</p>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">x</span> <span class="op">=</span> <span class="kw-2">&</span><span class="number">42</span>;
<span class="kw">let</span> <span class="ident">address</span> <span class="op">=</span> <span class="macro">format</span><span class="macro">!</span>(<span class="string">"{:p}"</span>, <span class="ident">x</span>); <span class="comment">// this produces something like '0x7f06092ac6d0'</span><a class="test-arrow" target="_blank" href="https://play.rust-lang.org/?code=fn%20main()%20%7B%0Alet%20x%20%3D%20%2642%3B%0A%0Alet%20address%20%3D%20format!(%22%7B%3Ap%7D%22%2C%20x)%3B%20%2F%2F%20this%20produces%20something%20like%20'0x7f06092ac6d0'%0A%7D">Run</a></pre>
<p>Implementing <code>Pointer</code> on a type:</p>
<pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fmt</span>;
<span class="kw">struct</span> <span class="ident">Length</span>(<span class="ident">i32</span>);
<span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Pointer</span> <span class="kw">for</span> <span class="ident">Length</span> {
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="comment">// use `as` to convert to a `*const T`, which implements Pointer, which we can use</span>
<span class="macro">write</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">"{:p}"</span>, <span class="self">self</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">Length</span>)
}
}
<span class="kw">let</span> <span class="ident">l</span> <span class="op">=</span> <span class="ident">Length</span>(<span class="number">42</span>);
<span class="macro">println</span><span class="macro">!</span>(<span class="string">"l is in memory here: {:p}"</span>, <span class="ident">l</span>);<a class="test-arrow" target="_blank" href="https://play.rust-lang.org/?code=fn%20main()%20%7B%0Ause%20std%3A%3Afmt%3B%0A%0Astruct%20Length(i32)%3B%0A%0Aimpl%20fmt%3A%3APointer%20for%20Length%20%7B%0A%20%20%20%20fn%20fmt(%26self%2C%20f%3A%20%26mut%20fmt%3A%3AFormatter)%20-%3E%20fmt%3A%3AResult%20%7B%0A%20%20%20%20%20%20%20%20%2F%2F%20use%20%60as%60%20to%20convert%20to%20a%20%60*const%20T%60%2C%20which%20implements%20Pointer%2C%20which%20we%20can%20use%0A%0A%20%20%20%20%20%20%20%20write!(f%2C%20%22%7B%3Ap%7D%22%2C%20self%20as%20*const%20Length)%0A%20%20%20%20%7D%0A%7D%0A%0Alet%20l%20%3D%20Length(42)%3B%0A%0Aprintln!(%22l%20is%20in%20memory%20here%3A%20%7B%3Ap%7D%22%2C%20l)%3B%0A%7D">Run</a></pre>
</div>
<h2 id='required-methods'>Required Methods</h2>
<div class='methods'>
<h3 id='tymethod.fmt' class='method'><span id='fmt.v' class='invisible'><code>fn <a href='#tymethod.fmt' class='fnname'>fmt</a>(&self, f: &mut <a class="struct" href="../../core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a>) -> <a class="type" href="../../core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></code></span></h3><div class='docblock'><p>Formats the value using the given formatter.</p>
</div></div>
<h2 id='implementors'>Implementors</h2>
<ul class='item-list' id='implementors-list'>
<li><code>impl<Ret> Pointer for fn() -> Ret</code></li>
<li><code>impl<Ret> Pointer for extern "C" fn() -> Ret</code></li>
<li><code>impl<Ret> Pointer for unsafe fn() -> Ret</code></li>
<li><code>impl<Ret> Pointer for unsafe extern "C" fn() -> Ret</code></li>
<li><code>impl<Ret, A> Pointer for fn(_: A) -> Ret</code></li>
<li><code>impl<Ret, A> Pointer for extern "C" fn(_: A) -> Ret</code></li>
<li><code>impl<Ret, A> Pointer for extern "C" fn(_: A, ...) -> Ret</code></li>
<li><code>impl<Ret, A> Pointer for unsafe fn(_: A) -> Ret</code></li>
<li><code>impl<Ret, A> Pointer for unsafe extern "C" fn(_: A) -> Ret</code></li>
<li><code>impl<Ret, A> Pointer for unsafe extern "C" fn(_: A, ...) -> Ret</code></li>
<li><code>impl<Ret, A, B> Pointer for fn(_: A, _: B) -> Ret</code></li>
<li><code>impl<Ret, A, B> Pointer for extern "C" fn(_: A, _: B) -> Ret</code></li>
<li><code>impl<Ret, A, B> Pointer for extern "C" fn(_: A, _: B, ...) -> Ret</code></li>
<li><code>impl<Ret, A, B> Pointer for unsafe fn(_: A, _: B) -> Ret</code></li>
<li><code>impl<Ret, A, B> Pointer for unsafe extern "C" fn(_: A, _: B) -> Ret</code></li>
<li><code>impl<Ret, A, B> Pointer for unsafe extern "C" fn(_: A, _: B, ...) -> Ret</code></li>
<li><code>impl<Ret, A, B, C> Pointer for fn(_: A, _: B, _: C) -> Ret</code></li>
<li><code>impl<Ret, A, B, C> Pointer for extern "C" fn(_: A, _: B, _: C) -> Ret</code></li>
<li><code>impl<Ret, A, B, C> Pointer for extern "C" fn(_: A, _: B, _: C, ...) -> Ret</code></li>
<li><code>impl<Ret, A, B, C> Pointer for unsafe fn(_: A, _: B, _: C) -> Ret</code></li>
<li><code>impl<Ret, A, B, C> Pointer for unsafe extern "C" fn(_: A, _: B, _: C) -> Ret</code></li>
<li><code>impl<Ret, A, B, C> Pointer for unsafe extern "C" fn(_: A, _: B, _: C, ...) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D> Pointer for fn(_: A, _: B, _: C, _: D) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D> Pointer for extern "C" fn(_: A, _: B, _: C, _: D) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D> Pointer for extern "C" fn(_: A, _: B, _: C, _: D, ...) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D> Pointer for unsafe fn(_: A, _: B, _: C, _: D) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D> Pointer for unsafe extern "C" fn(_: A, _: B, _: C, _: D) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D> Pointer for unsafe extern "C" fn(_: A, _: B, _: C, _: D, ...) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E> Pointer for fn(_: A, _: B, _: C, _: D, _: E) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E> Pointer for extern "C" fn(_: A, _: B, _: C, _: D, _: E) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E> Pointer for extern "C" fn(_: A, _: B, _: C, _: D, _: E, ...) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E> Pointer for unsafe fn(_: A, _: B, _: C, _: D, _: E) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E> Pointer for unsafe extern "C" fn(_: A, _: B, _: C, _: D, _: E) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E> Pointer for unsafe extern "C" fn(_: A, _: B, _: C, _: D, _: E, ...) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F> Pointer for fn(_: A, _: B, _: C, _: D, _: E, _: F) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F> Pointer for extern "C" fn(_: A, _: B, _: C, _: D, _: E, _: F) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F> Pointer for extern "C" fn(_: A, _: B, _: C, _: D, _: E, _: F, ...) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F> Pointer for unsafe fn(_: A, _: B, _: C, _: D, _: E, _: F) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F> Pointer for unsafe extern "C" fn(_: A, _: B, _: C, _: D, _: E, _: F) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F> Pointer for unsafe extern "C" fn(_: A, _: B, _: C, _: D, _: E, _: F, ...) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F, G> Pointer for fn(_: A, _: B, _: C, _: D, _: E, _: F, _: G) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F, G> Pointer for extern "C" fn(_: A, _: B, _: C, _: D, _: E, _: F, _: G) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F, G> Pointer for extern "C" fn(_: A, _: B, _: C, _: D, _: E, _: F, _: G, ...) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F, G> Pointer for unsafe fn(_: A, _: B, _: C, _: D, _: E, _: F, _: G) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F, G> Pointer for unsafe extern "C" fn(_: A, _: B, _: C, _: D, _: E, _: F, _: G) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F, G> Pointer for unsafe extern "C" fn(_: A, _: B, _: C, _: D, _: E, _: F, _: G, ...) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F, G, H> Pointer for fn(_: A, _: B, _: C, _: D, _: E, _: F, _: G, _: H) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F, G, H> Pointer for extern "C" fn(_: A, _: B, _: C, _: D, _: E, _: F, _: G, _: H) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F, G, H> Pointer for extern "C" fn(_: A, _: B, _: C, _: D, _: E, _: F, _: G, _: H, ...) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F, G, H> Pointer for unsafe fn(_: A, _: B, _: C, _: D, _: E, _: F, _: G, _: H) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F, G, H> Pointer for unsafe extern "C" fn(_: A, _: B, _: C, _: D, _: E, _: F, _: G, _: H) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F, G, H> Pointer for unsafe extern "C" fn(_: A, _: B, _: C, _: D, _: E, _: F, _: G, _: H, ...) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F, G, H, I> Pointer for fn(_: A, _: B, _: C, _: D, _: E, _: F, _: G, _: H, _: I) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F, G, H, I> Pointer for extern "C" fn(_: A, _: B, _: C, _: D, _: E, _: F, _: G, _: H, _: I) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F, G, H, I> Pointer for extern "C" fn(_: A, _: B, _: C, _: D, _: E, _: F, _: G, _: H, _: I, ...) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F, G, H, I> Pointer for unsafe fn(_: A, _: B, _: C, _: D, _: E, _: F, _: G, _: H, _: I) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F, G, H, I> Pointer for unsafe extern "C" fn(_: A, _: B, _: C, _: D, _: E, _: F, _: G, _: H, _: I) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F, G, H, I> Pointer for unsafe extern "C" fn(_: A, _: B, _: C, _: D, _: E, _: F, _: G, _: H, _: I, ...) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F, G, H, I, J> Pointer for fn(_: A, _: B, _: C, _: D, _: E, _: F, _: G, _: H, _: I, _: J) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F, G, H, I, J> Pointer for extern "C" fn(_: A, _: B, _: C, _: D, _: E, _: F, _: G, _: H, _: I, _: J) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F, G, H, I, J> Pointer for extern "C" fn(_: A, _: B, _: C, _: D, _: E, _: F, _: G, _: H, _: I, _: J, ...) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F, G, H, I, J> Pointer for unsafe fn(_: A, _: B, _: C, _: D, _: E, _: F, _: G, _: H, _: I, _: J) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F, G, H, I, J> Pointer for unsafe extern "C" fn(_: A, _: B, _: C, _: D, _: E, _: F, _: G, _: H, _: I, _: J) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F, G, H, I, J> Pointer for unsafe extern "C" fn(_: A, _: B, _: C, _: D, _: E, _: F, _: G, _: H, _: I, _: J, ...) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F, G, H, I, J, K> Pointer for fn(_: A, _: B, _: C, _: D, _: E, _: F, _: G, _: H, _: I, _: J, _: K) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F, G, H, I, J, K> Pointer for extern "C" fn(_: A, _: B, _: C, _: D, _: E, _: F, _: G, _: H, _: I, _: J, _: K) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F, G, H, I, J, K> Pointer for extern "C" fn(_: A, _: B, _: C, _: D, _: E, _: F, _: G, _: H, _: I, _: J, _: K, ...) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F, G, H, I, J, K> Pointer for unsafe fn(_: A, _: B, _: C, _: D, _: E, _: F, _: G, _: H, _: I, _: J, _: K) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F, G, H, I, J, K> Pointer for unsafe extern "C" fn(_: A, _: B, _: C, _: D, _: E, _: F, _: G, _: H, _: I, _: J, _: K) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F, G, H, I, J, K> Pointer for unsafe extern "C" fn(_: A, _: B, _: C, _: D, _: E, _: F, _: G, _: H, _: I, _: J, _: K, ...) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F, G, H, I, J, K, L> Pointer for fn(_: A, _: B, _: C, _: D, _: E, _: F, _: G, _: H, _: I, _: J, _: K, _: L) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F, G, H, I, J, K, L> Pointer for extern "C" fn(_: A, _: B, _: C, _: D, _: E, _: F, _: G, _: H, _: I, _: J, _: K, _: L) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F, G, H, I, J, K, L> Pointer for extern "C" fn(_: A, _: B, _: C, _: D, _: E, _: F, _: G, _: H, _: I, _: J, _: K, _: L, ...) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F, G, H, I, J, K, L> Pointer for unsafe fn(_: A, _: B, _: C, _: D, _: E, _: F, _: G, _: H, _: I, _: J, _: K, _: L) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F, G, H, I, J, K, L> Pointer for unsafe extern "C" fn(_: A, _: B, _: C, _: D, _: E, _: F, _: G, _: H, _: I, _: J, _: K, _: L) -> Ret</code></li>
<li><code>impl<Ret, A, B, C, D, E, F, G, H, I, J, K, L> Pointer for unsafe extern "C" fn(_: A, _: B, _: C, _: D, _: E, _: F, _: G, _: H, _: I, _: J, _: K, _: L, ...) -> Ret</code></li>
<li><code>impl<T: ?<a class="trait" href="../../core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>> Pointer for <a class="struct" href="../../core/ptr/struct.Unique.html" title="struct core::ptr::Unique">Unique</a><T></code></li>
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<li><code>impl<T: ?<a class="trait" href="../../core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>> Pointer for *const T</code></li>
<li><code>impl<T: ?<a class="trait" href="../../core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>> Pointer for *mut T</code></li>
<li><code>impl<'a, T: ?<a class="trait" href="../../core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>> Pointer for &'a T</code></li>
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core-updates
>
by-pkgid
>
878cdd00a13d17a73c6619a777ef5d74
>
files
>
1017
