<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source to the Rust file `libstd/../stdsimd/stdsimd/arch/detect/error_macros.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>error_macros.rs.html -- source</title><link rel="stylesheet" type="text/css" href="../../../../../../../normalize.css"><link rel="stylesheet" type="text/css" href="../../../../../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../../../../../../dark.css"><link rel="stylesheet" type="text/css" href="../../../../../../../light.css" id="themeStyle"><script src="../../../../../../../storage.js"></script><link rel="shortcut icon" href="https://doc.rust-lang.org/favicon.ico"></head><body class="rustdoc source"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><a href='../../../../../../../std/index.html'><img src='https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png' alt='logo' width='100'></a></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../../../../../../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../../../../../../../theme.js"></script><nav class="sub"><form class="search-form js-only"><div class="search-container"><input class="search-input" name="search" autocomplete="off" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><a id="settings-menu" href="../../../../../../../settings.html"><img src="../../../../../../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><pre class="line-numbers"><span id="1"> 1</span> <span id="2"> 2</span> <span id="3"> 3</span> <span id="4"> 4</span> <span id="5"> 5</span> <span id="6"> 6</span> <span id="7"> 7</span> <span id="8"> 8</span> <span id="9"> 9</span> <span id="10"> 10</span> <span id="11"> 11</span> <span id="12"> 12</span> <span id="13"> 13</span> <span id="14"> 14</span> <span id="15"> 15</span> <span id="16"> 16</span> <span id="17"> 17</span> <span id="18"> 18</span> <span id="19"> 19</span> <span id="20"> 20</span> <span id="21"> 21</span> <span id="22"> 22</span> <span id="23"> 23</span> <span id="24"> 24</span> <span id="25"> 25</span> <span id="26"> 26</span> <span id="27"> 27</span> <span id="28"> 28</span> <span id="29"> 29</span> <span id="30"> 30</span> <span id="31"> 31</span> <span id="32"> 32</span> <span id="33"> 33</span> <span id="34"> 34</span> <span id="35"> 35</span> <span id="36"> 36</span> <span id="37"> 37</span> <span id="38"> 38</span> <span id="39"> 39</span> <span id="40"> 40</span> <span id="41"> 41</span> <span id="42"> 42</span> <span id="43"> 43</span> <span id="44"> 44</span> <span id="45"> 45</span> <span id="46"> 46</span> <span id="47"> 47</span> <span id="48"> 48</span> <span id="49"> 49</span> <span id="50"> 50</span> <span id="51"> 51</span> <span id="52"> 52</span> <span id="53"> 53</span> <span id="54"> 54</span> <span id="55"> 55</span> <span id="56"> 56</span> <span id="57"> 57</span> <span id="58"> 58</span> <span id="59"> 59</span> <span id="60"> 60</span> <span id="61"> 61</span> <span id="62"> 62</span> <span id="63"> 63</span> <span id="64"> 64</span> <span id="65"> 65</span> <span id="66"> 66</span> <span id="67"> 67</span> <span id="68"> 68</span> <span id="69"> 69</span> <span id="70"> 70</span> <span id="71"> 71</span> <span id="72"> 72</span> <span id="73"> 73</span> <span id="74"> 74</span> <span id="75"> 75</span> <span id="76"> 76</span> <span id="77"> 77</span> <span id="78"> 78</span> <span id="79"> 79</span> <span id="80"> 80</span> <span id="81"> 81</span> <span id="82"> 82</span> <span id="83"> 83</span> <span id="84"> 84</span> <span id="85"> 85</span> <span id="86"> 86</span> <span id="87"> 87</span> <span id="88"> 88</span> <span id="89"> 89</span> <span id="90"> 90</span> <span id="91"> 91</span> <span id="92"> 92</span> <span id="93"> 93</span> <span id="94"> 94</span> <span id="95"> 95</span> <span id="96"> 96</span> <span id="97"> 97</span> <span id="98"> 98</span> <span id="99"> 99</span> <span id="100">100</span> <span id="101">101</span> <span id="102">102</span> <span id="103">103</span> <span id="104">104</span> <span id="105">105</span> <span id="106">106</span> <span id="107">107</span> <span id="108">108</span> <span id="109">109</span> <span id="110">110</span> <span id="111">111</span> <span id="112">112</span> <span id="113">113</span> <span id="114">114</span> <span id="115">115</span> </pre><pre class="rust "> <span class="doccomment">//! The `is_{target_arch}_feature_detected!` macro are only available on their</span> <span class="doccomment">//! architecture. These macros provide a better error messages when the user</span> <span class="doccomment">//! attempts to call them in a different architecture.</span> <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">any</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"x86"</span>, <span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"x86_64"</span>)))]</span> <span class="attribute">#[<span class="ident">macro_export</span>]</span> <span class="attribute">#[<span class="ident">unstable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"stdsimd"</span>, <span class="ident">issue</span> <span class="op">=</span> <span class="string">"0"</span>)]</span> <span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">is_x86_feature_detected</span> { (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>: <span class="ident">tt</span>) <span class="op">=></span> { <span class="macro">compile_error</span><span class="macro">!</span>( <span class="string">r#" is_x86_feature_detected can only be used on x86 and x86_64 targets. You can prevent it from being used in other architectures by guarding it behind a cfg(target_arch) as follows: #[cfg(any(target_arch = "x86", target_arch = "x86_64"))] { if is_x86_feature_detected(...) { ... } } "#</span> ) }; } <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"arm"</span>))]</span> <span class="attribute">#[<span class="ident">macro_export</span>]</span> <span class="attribute">#[<span class="ident">unstable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"stdsimd"</span>, <span class="ident">issue</span> <span class="op">=</span> <span class="string">"0"</span>)]</span> <span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">is_arm_feature_detected</span> { (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>: <span class="ident">tt</span>) <span class="op">=></span> { <span class="macro">compile_error</span><span class="macro">!</span>( <span class="string">r#" is_arm_feature_detected can only be used on ARM targets. You can prevent it from being used in other architectures by guarding it behind a cfg(target_arch) as follows: #[cfg(target_arch = "arm")] { if is_arm_feature_detected(...) { ... } } "#</span> ) }; } <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"aarch64"</span>))]</span> <span class="attribute">#[<span class="ident">macro_export</span>]</span> <span class="attribute">#[<span class="ident">unstable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"stdsimd"</span>, <span class="ident">issue</span> <span class="op">=</span> <span class="string">"0"</span>)]</span> <span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">is_aarch64_feature_detected</span> { (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>: <span class="ident">tt</span>) <span class="op">=></span> { <span class="macro">compile_error</span><span class="macro">!</span>( <span class="string">r#" is_aarch64_feature_detected can only be used on AArch64 targets. You can prevent it from being used in other architectures by guarding it behind a cfg(target_arch) as follows: #[cfg(target_arch = "aarch64")] { if is_aarch64_feature_detected(...) { ... } } "#</span> ) }; } <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"powerpc64"</span>))]</span> <span class="attribute">#[<span class="ident">macro_export</span>]</span> <span class="attribute">#[<span class="ident">unstable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"stdsimd"</span>, <span class="ident">issue</span> <span class="op">=</span> <span class="string">"0"</span>)]</span> <span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">is_powerpc64_feature_detected</span> { (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>:<span class="ident">tt</span>) <span class="op">=></span> { <span class="macro">compile_error</span><span class="macro">!</span>(<span class="string">r#" is_powerpc64_feature_detected can only be used on PowerPC64 targets. You can prevent it from being used in other architectures by guarding it behind a cfg(target_arch) as follows: #[cfg(target_arch = "powerpc64")] { if is_powerpc64_feature_detected(...) { ... } } "#</span>) }; } <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"mips"</span>))]</span> <span class="attribute">#[<span class="ident">macro_export</span>]</span> <span class="attribute">#[<span class="ident">unstable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"stdsimd"</span>, <span class="ident">issue</span> <span class="op">=</span> <span class="string">"0"</span>)]</span> <span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">is_mips_feature_detected</span> { (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>: <span class="ident">tt</span>) <span class="op">=></span> { <span class="macro">compile_error</span><span class="macro">!</span>( <span class="string">r#" is_mips_feature_detected can only be used on MIPS targets. You can prevent it from being used in other architectures by guarding it behind a cfg(target_arch) as follows: #[cfg(target_arch = "mips")] { if is_mips_feature_detected(...) { ... } } "#</span> ) }; } <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"mips64"</span>))]</span> <span class="attribute">#[<span class="ident">macro_export</span>]</span> <span class="attribute">#[<span class="ident">unstable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"stdsimd"</span>, <span class="ident">issue</span> <span class="op">=</span> <span class="string">"0"</span>)]</span> <span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">is_mips64_feature_detected</span> { (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>: <span class="ident">tt</span>) <span class="op">=></span> { <span class="macro">compile_error</span><span class="macro">!</span>( <span class="string">r#" is_mips64_feature_detected can only be used on MIPS64 targets. You can prevent it from being used in other architectures by guarding it behind a cfg(target_arch) as follows: #[cfg(target_arch = "mips64")] { if is_mips64_feature_detected(...) { ... } } "#</span> ) }; } </pre> </section><section id="search" class="content hidden"></section><section class="footer"></section><aside id="help" class="hidden"><div><h1 class="hidden">Help</h1><div class="shortcuts"><h2>Keyboard Shortcuts</h2><dl><dt><kbd>?</kbd></dt><dd>Show this help dialog</dd><dt><kbd>S</kbd></dt><dd>Focus the search field</dd><dt><kbd>↑</kbd></dt><dd>Move up in search results</dd><dt><kbd>↓</kbd></dt><dd>Move down in search results</dd><dt><kbd>↹</kbd></dt><dd>Switch tab</dd><dt><kbd>⏎</kbd></dt><dd>Go to active search result</dd><dt><kbd>+</kbd></dt><dd>Expand all sections</dd><dt><kbd>-</kbd></dt><dd>Collapse all sections</dd></dl></div><div class="infos"><h2>Search Tricks</h2><p>Prefix searches with a type followed by a colon (e.g. <code>fn:</code>) to restrict the search to a given type.</p><p>Accepted types are: <code>fn</code>, <code>mod</code>, <code>struct</code>, <code>enum</code>, <code>trait</code>, <code>type</code>, <code>macro</code>, and <code>const</code>.</p><p>Search functions by type signature (e.g. <code>vec -> usize</code> or <code>* -> vec</code>)</p><p>Search multiple things at once by splitting your query with comma (e.g. <code>str,u8</code> or <code>String,struct:Vec,test</code>)</p></div></div></aside><script>window.rootPath = "../../../../../../../";window.currentCrate = "std";</script><script src="../../../../../../../aliases.js"></script><script src="../../../../../../../main.js"></script><script defer src="../../../../../../../search-index.js"></script></body></html>