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<!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="Procedural macro for defining global constructor/destructor functions."><meta name="keywords" content="rust, rustlang, rust-lang, ctor"><title>ctor - Rust</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="../light.css" id="themeStyle"><link rel="stylesheet" type="text/css" href="../dark.css" disabled ><link rel="stylesheet" type="text/css" href="../ayu.css" disabled ><script id="default-settings"></script><script src="../storage.js"></script><script src="../crates.js"></script><noscript><link rel="stylesheet" href="../noscript.css"></noscript><link rel="icon" type="image/svg+xml" href="../favicon.svg">
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<link rel="alternate icon" type="image/png" href="../favicon-32x32.png"><style type="text/css">#crate-search{background-image:url("../down-arrow.svg");}</style></head><body class="rustdoc mod"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu" role="button">☰</div><a href='../ctor/index.html'><div class='logo-container rust-logo'><img src='../rust-logo.png' alt='logo'></div></a><p class="location">Crate ctor</p><div class="block version"><p>Version 0.1.20</p></div><div class="sidebar-elems"><a id="all-types" href="all.html"><p>See all ctor's items</p></a><p class="location"></p><div id="sidebar-vars" data-name="ctor" data-ty="mod" data-relpath="../"></div><script defer src="../sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu"><img src="../brush.svg" width="18" height="18" alt="Pick another theme!"></button><div id="theme-choices" role="menu"></div></div><nav class="sub"><form class="search-form"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" disabled autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><button type="button" class="help-button">?</button>
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<a id="settings-menu" href="../settings.html"><img src="../wheel.svg" width="18" height="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class="fqn"><span class="in-band">Crate <a class="mod" href="">ctor</a><button id="copy-path" onclick="copy_path(this)">⎘</button></span><span class="out-of-band"><span id="render-detail"><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span><a class="srclink" href="../src/ctor/lib.rs.html#1-394" title="goto source code">[src]</a></span></h1><div class="docblock"><p>Procedural macro for defining global constructor/destructor functions.</p>
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<p>This provides module initialization/teardown functions for Rust (like
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<code>__attribute__((constructor))</code> in C/C++) for Linux, OSX, and Windows via
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the <code>#[ctor]</code> and <code>#[dtor]</code> macros.</p>
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<p>This library works and has been tested for Linux, OSX and Windows. This
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library will also work as expected in both <code>bin</code> and <code>cdylib</code> outputs,
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ie: the <code>ctor</code> and <code>dtor</code> will run at executable or library
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startup/shutdown respectively.</p>
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<p>This library currently requires Rust > <code>1.31.0</code> at a minimum for the
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procedural macro support.</p>
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</div><h2 id="attributes" class="section-header"><a href="#attributes">Attribute Macros</a></h2>
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<table><tr class="module-item"><td><a class="attr" href="attr.ctor.html" title="ctor::ctor attr">ctor</a></td><td class="docblock-short"><p>Marks a function or static variable as a library/executable constructor.
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This uses OS-specific linker sections to call a specific function at
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load time.</p>
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</td></tr><tr class="module-item"><td><a class="attr" href="attr.dtor.html" title="ctor::dtor attr">dtor</a></td><td class="docblock-short"><p>Marks a function as a library/executable destructor. This uses OS-specific
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linker sections to call a specific function at termination time.</p>
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