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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 `crates/common/src/utils/ron.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>ron.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><script defer src="../../../main.js"></script><script defer src="../../../source-script.js"></script><script defer src="../../../source-files.js"></script>
<noscript><link rel="stylesheet" href="../../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../../favicon.svg"><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='../../../fe_common/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" 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"><code><span class="kw">use</span> <span class="ident">difference</span>::{<span class="ident">Changeset</span>, <span class="ident">Difference</span>};
<span class="kw">use</span> <span class="ident">serde::Serialize</span>;
<span class="kw">use</span> <span class="ident">std::fmt</span>;
<span class="doccomment">/// Return the lines of text in the string `lines` prefixed with the prefix in</span>
<span class="doccomment">/// the string `prefix`.</span>
<span class="kw">fn</span> <span class="ident">prefix_lines</span>(<span class="ident">prefix</span>: <span class="kw-2">&</span><span class="ident">str</span>, <span class="ident">lines</span>: <span class="kw-2">&</span><span class="ident">str</span>) -> <span class="ident">String</span> {
<span class="ident">lines</span>
.<span class="ident">lines</span>()
.<span class="ident">map</span>(<span class="op">|</span><span class="ident">i</span><span class="op">|</span> [<span class="ident">prefix</span>, <span class="ident">i</span>].<span class="ident">concat</span>())
.<span class="ident">collect</span>::<span class="op"><</span><span class="ident">Vec</span><span class="op"><</span><span class="ident">String</span><span class="op">></span><span class="op">></span>()
.<span class="ident">join</span>(<span class="string">"\n"</span>)
}
<span class="doccomment">/// Wrapper struct for formatting changesets from the `difference` package.</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Diff</span>(<span class="ident">Changeset</span>);
<span class="kw">impl</span> <span class="ident">Diff</span> {
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">left</span>: <span class="kw-2">&</span><span class="ident">str</span>, <span class="ident">right</span>: <span class="kw-2">&</span><span class="ident">str</span>) -> <span class="self">Self</span> {
<span class="self">Self</span>(<span class="ident">Changeset::new</span>(<span class="ident">left</span>, <span class="ident">right</span>, <span class="string">"\n"</span>))
}
}
<span class="kw">impl</span> <span class="ident">fmt::Display</span> <span class="kw">for</span> <span class="ident">Diff</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">&mut</span> <span class="ident">fmt::Formatter</span>) -> <span class="ident">fmt::Result</span> {
<span class="kw">for</span> <span class="ident">d</span> <span class="kw">in</span> <span class="kw-2">&</span><span class="self">self</span>.<span class="number">0</span>.<span class="ident">diffs</span> {
<span class="kw">match</span> <span class="kw-2">*</span><span class="ident">d</span> {
<span class="ident">Difference::Same</span>(<span class="kw-2">ref</span> <span class="ident">x</span>) => {
<span class="macro">write!</span>(<span class="ident">f</span>, <span class="string">"{}{}"</span>, <span class="ident">prefix_lines</span>(<span class="string">" "</span>, <span class="ident">x</span>), <span class="self">self</span>.<span class="number">0</span>.<span class="ident">split</span>)<span class="question-mark">?</span>;
}
<span class="ident">Difference::Add</span>(<span class="kw-2">ref</span> <span class="ident">x</span>) => {
<span class="macro">write!</span>(<span class="ident">f</span>, <span class="string">"\x1b[92m{}\x1b[0m{}"</span>, <span class="ident">prefix_lines</span>(<span class="string">"+"</span>, <span class="ident">x</span>), <span class="self">self</span>.<span class="number">0</span>.<span class="ident">split</span>)<span class="question-mark">?</span>;
}
<span class="ident">Difference::Rem</span>(<span class="kw-2">ref</span> <span class="ident">x</span>) => {
<span class="macro">write!</span>(<span class="ident">f</span>, <span class="string">"\x1b[91m{}\x1b[0m{}"</span>, <span class="ident">prefix_lines</span>(<span class="string">"-"</span>, <span class="ident">x</span>), <span class="self">self</span>.<span class="number">0</span>.<span class="ident">split</span>)<span class="question-mark">?</span>;
}
}
}
<span class="prelude-val">Ok</span>(())
}
}
<span class="doccomment">/// Compare the given strings and panic when not equal with a colorized line</span>
<span class="doccomment">/// diff.</span>
<span class="attribute">#[<span class="ident">macro_export</span>]</span>
<span class="macro">macro_rules!</span> <span class="ident">assert_strings_eq</span> {
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">left</span>:<span class="ident">expr</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">right</span>:<span class="ident">expr</span>,) => {{
<span class="macro">assert_strings_eq!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">left</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">right</span>)
}};
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">left</span>:<span class="ident">expr</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">right</span>:<span class="ident">expr</span>) => {{
<span class="kw">match</span> (<span class="kw-2">&</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">left</span>), <span class="kw-2">&</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">right</span>)) {
(<span class="ident">left_val</span>, <span class="ident">right_val</span>) => {
<span class="kw">if</span> <span class="kw-2">*</span><span class="ident">left_val</span> <span class="op">!</span><span class="op">=</span> <span class="kw-2">*</span><span class="ident">right_val</span> {
<span class="macro">panic!</span>(
<span class="string">"assertion failed: `(left == right)`\ndiff:\n{}"</span>,
<span class="ident">Diff::new</span>(<span class="ident">left_val</span>, <span class="ident">right_val</span>),
)
}
}
}
}};
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">left</span>:<span class="ident">expr</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">right</span>:<span class="ident">expr</span>, $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">args</span>:<span class="ident">tt</span>)<span class="kw-2">*</span>) => {{
<span class="kw">match</span> (<span class="kw-2">&</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">left</span>), <span class="kw-2">&</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">right</span>)) {
(<span class="ident">left_val</span>, <span class="ident">right_val</span>) => {
<span class="kw">if</span> <span class="kw-2">*</span><span class="ident">left_val</span> <span class="op">!</span><span class="op">=</span> <span class="kw-2">*</span><span class="ident">right_val</span> {
<span class="macro">panic!</span>(
<span class="string">"assertion failed: `(left == right)`: {}\ndiff:\n{}"</span>,
<span class="macro">format_args!</span>($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">args</span>)<span class="kw-2">*</span>),
<span class="ident">Diff::new</span>(<span class="ident">left_val</span>, <span class="ident">right_val</span>),
)
}
}
}
}};
}
<span class="doccomment">/// Convenience function to serialize objects in RON format with custom pretty</span>
<span class="doccomment">/// printing config and struct names.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">to_ron_string_pretty</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>(<span class="ident">value</span>: <span class="kw-2">&</span><span class="ident">T</span>) -> <span class="ident">ron::ser::Result</span><span class="op"><</span><span class="ident">String</span><span class="op">></span>
<span class="kw">where</span>
<span class="ident">T</span>: <span class="ident">Serialize</span>,
{
<span class="kw">let</span> <span class="ident">config</span> <span class="op">=</span> <span class="ident">ron::ser::PrettyConfig</span> {
<span class="ident">indentor</span>: <span class="string">" "</span>.<span class="ident">to_string</span>(),
..<span class="ident">Default::default</span>()
};
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">serializer</span> <span class="op">=</span> <span class="ident">ron::ser::Serializer::new</span>(<span class="prelude-val">Some</span>(<span class="ident">config</span>), <span class="bool-val">true</span>);
<span class="ident">value</span>.<span class="ident">serialize</span>(<span class="kw-2">&mut</span> <span class="ident">serializer</span>)<span class="question-mark">?</span>;
<span class="prelude-val">Ok</span>(<span class="ident">serializer</span>.<span class="ident">into_output_string</span>())
}
</code></pre></div>
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