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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="Source of the Rust file `/home/runner/.cargo/registry/src/github.com-1ecc6299db9ec823/quickcheck-0.4.1/src/lib.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>lib.rs - 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="../../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"><link rel="alternate icon" type="image/png" href="../../favicon-16x16.png"><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 source"><!--[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='../../quickcheck/index.html'><div class='logo-container rust-logo'><img src='../../rust-logo.png' alt='logo'></div></a></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu" title="themes"><img width="18" height="18" alt="Pick another theme!" src="../../brush.svg"></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" id="help-button" title="help">?</button><a id="settings-menu" href="../../settings.html" title="settings"><img width="18" height="18" alt="Change settings" src="../../wheel.svg"></a></div></form></nav><section id="main" class="content"><div class="example-wrap"><pre class="line-numbers"><span id="1"> 1</span>
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</pre><pre class="rust">
<span class="doccomment">//! This crate is a port of</span>
<span class="doccomment">//! [Haskell's QuickCheck](http://hackage.haskell.org/package/QuickCheck).</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! For detailed examples, please see the</span>
<span class="doccomment">//! [README](https://github.com/BurntSushi/quickcheck).</span>
<span class="attribute">#![<span class="ident">allow</span>(<span class="ident">deprecated</span>)]</span> <span class="comment">// for connect -> join in 1.3</span>
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"use_logging"</span>)]</span>
<span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">env_logger</span>;
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"use_logging"</span>)]</span>
<span class="attribute">#[<span class="ident">macro_use</span>]</span> <span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">log</span>;
<span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">rand</span>;
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">arbitrary</span>::{
<span class="ident">Arbitrary</span>, <span class="ident">Gen</span>, <span class="ident">StdGen</span>,
<span class="ident">empty_shrinker</span>, <span class="ident">single_shrinker</span>,
};
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">rand::Rng</span>;
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">tester</span>::{<span class="ident">QuickCheck</span>, <span class="ident">Testable</span>, <span class="ident">TestResult</span>, <span class="ident">quickcheck</span>};
<span class="doccomment">/// A macro for writing quickcheck tests.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This macro takes as input one or more property functions to test, and</span>
<span class="doccomment">/// produces a proper `#[test]` function for each property. If the property</span>
<span class="doccomment">/// fails, the behavior is as if `quickcheck` were called on the property</span>
<span class="doccomment">/// (i.e., it panics and fails the test).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Note that this macro doesn't support `mut` or patterns in parameters.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Example</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```rust</span>
<span class="doccomment">/// # #[macro_use] extern crate quickcheck; fn main() {</span>
<span class="doccomment">/// quickcheck! {</span>
<span class="doccomment">/// fn prop_reverse_reverse(xs: Vec<usize>) -> bool {</span>
<span class="doccomment">/// let rev: Vec<_> = xs.clone().into_iter().rev().collect();</span>
<span class="doccomment">/// let revrev: Vec<_> = rev.into_iter().rev().collect();</span>
<span class="doccomment">/// xs == revrev</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// };</span>
<span class="doccomment">/// # }</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">macro_export</span>]</span>
<span class="macro">macro_rules!</span> <span class="ident">quickcheck</span> {
(@<span class="ident">as_items</span> $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span>:<span class="ident">item</span>)<span class="kw-2">*</span>) <span class="op">=</span><span class="op">></span> ($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">i</span>)<span class="kw-2">*</span>);
{
$(
$(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">m</span>:<span class="ident">meta</span>]</span>)<span class="op">*</span>
<span class="kw">fn</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">fn_name</span>:<span class="ident">ident</span>($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">arg_name</span>:<span class="ident">ident</span> : <span class="macro-nonterminal">$</span><span class="macro-nonterminal">arg_ty</span>:<span class="ident">ty</span>),<span class="kw-2">*</span>) <span class="op">-</span><span class="op">></span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ret</span>:<span class="ident">ty</span> {
$(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">code</span>:<span class="ident">tt</span>)<span class="op">*</span>
}
)<span class="op">*</span>
} <span class="op">=</span><span class="op">></span> (
<span class="macro">quickcheck!</span> {
@<span class="ident">as_items</span>
$(
<span class="attribute">#[<span class="ident">test</span>]</span>
$(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">m</span>]</span>)<span class="op">*</span>
<span class="kw">fn</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">fn_name</span>() {
<span class="kw">fn</span> <span class="ident">prop</span>($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">arg_name</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">arg_ty</span>),<span class="kw-2">*</span>) <span class="op">-</span><span class="op">></span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ret</span> {
$(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">code</span>)<span class="op">*</span>
}
<span class="macro-nonterminal">$</span><span class="kw">crate</span><span class="macro-nonterminal">::quickcheck</span>(<span class="ident">prop</span> <span class="kw">as</span> <span class="kw">fn</span>($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">arg_ty</span>),<span class="kw-2">*</span>) <span class="op">-</span><span class="op">></span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ret</span>);
}
)<span class="op">*</span>
}
)
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"use_logging"</span>)]</span>
<span class="kw">fn</span> <span class="ident">env_logger_init</span>() <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span>(), <span class="ident">log::SetLoggerError</span><span class="op">></span> {
<span class="ident">env_logger::init</span>()
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"use_logging"</span>))]</span>
<span class="kw">fn</span> <span class="ident">env_logger_init</span>() { }
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"use_logging"</span>))]</span>
<span class="macro">macro_rules!</span> <span class="ident">info</span> {
($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">_ignore</span>:<span class="ident">tt</span>)<span class="kw-2">*</span>) <span class="op">=</span><span class="op">></span> { () };
}
<span class="kw">mod</span> <span class="ident">arbitrary</span>;
<span class="kw">mod</span> <span class="ident">tester</span>;
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">test</span>)]</span>
<span class="kw">mod</span> <span class="ident">tests</span>;
</pre></div>
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