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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/quote-1.0.20/src/ext.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>ext.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Semibold.ttf.woff2"><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="../../ayu.css" disabled><link rel="stylesheet" type="text/css" href="../../dark.css" disabled><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../storage.js"></script><script defer src="../../source-script.js"></script><script defer src="../../source-files.js"></script><script defer src="../../main.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"></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="mobile-topbar"><button class="sidebar-menu-toggle">☰</button><a class="sidebar-logo" href="../../quote/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div>
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</pre><pre class="rust"><code><span class="kw">use</span> <span class="ident"><span class="kw">super</span>::ToTokens</span>;
<span class="kw">use</span> <span class="ident">std::iter</span>;
<span class="kw">use</span> <span class="ident">proc_macro2</span>::{<span class="ident">TokenStream</span>, <span class="ident">TokenTree</span>};
<span class="doccomment">/// TokenStream extension trait with methods for appending tokens.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This trait is sealed and cannot be implemented outside of the `quote` crate.</span>
<span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">TokenStreamExt</span>: <span class="ident">private::Sealed</span> {
<span class="doccomment">/// For use by `ToTokens` implementations.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Appends the token specified to this list of tokens.</span>
<span class="kw">fn</span> <span class="ident">append</span><span class="op"><</span><span class="ident">U</span><span class="op">></span>(<span class="kw-2">&mut</span> <span class="self">self</span>, <span class="ident">token</span>: <span class="ident">U</span>)
<span class="kw">where</span>
<span class="ident">U</span>: <span class="ident">Into</span><span class="op"><</span><span class="ident">TokenTree</span><span class="op">></span>;
<span class="doccomment">/// For use by `ToTokens` implementations.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// # use quote::{quote, TokenStreamExt, ToTokens};</span>
<span class="doccomment">/// # use proc_macro2::TokenStream;</span>
<span class="doccomment">/// #</span>
<span class="doccomment">/// struct X;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// impl ToTokens for X {</span>
<span class="doccomment">/// fn to_tokens(&self, tokens: &mut TokenStream) {</span>
<span class="doccomment">/// tokens.append_all(&[true, false]);</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// }</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let tokens = quote!(#X);</span>
<span class="doccomment">/// assert_eq!(tokens.to_string(), "true false");</span>
<span class="doccomment">/// ```</span>
<span class="kw">fn</span> <span class="ident">append_all</span><span class="op"><</span><span class="ident">I</span><span class="op">></span>(<span class="kw-2">&mut</span> <span class="self">self</span>, <span class="ident">iter</span>: <span class="ident">I</span>)
<span class="kw">where</span>
<span class="ident">I</span>: <span class="ident">IntoIterator</span>,
<span class="ident">I::Item</span>: <span class="ident">ToTokens</span>;
<span class="doccomment">/// For use by `ToTokens` implementations.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Appends all of the items in the iterator `I`, separated by the tokens</span>
<span class="doccomment">/// `U`.</span>
<span class="kw">fn</span> <span class="ident">append_separated</span><span class="op"><</span><span class="ident">I</span>, <span class="ident">U</span><span class="op">></span>(<span class="kw-2">&mut</span> <span class="self">self</span>, <span class="ident">iter</span>: <span class="ident">I</span>, <span class="ident">op</span>: <span class="ident">U</span>)
<span class="kw">where</span>
<span class="ident">I</span>: <span class="ident">IntoIterator</span>,
<span class="ident">I::Item</span>: <span class="ident">ToTokens</span>,
<span class="ident">U</span>: <span class="ident">ToTokens</span>;
<span class="doccomment">/// For use by `ToTokens` implementations.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Appends all tokens in the iterator `I`, appending `U` after each</span>
<span class="doccomment">/// element, including after the last element of the iterator.</span>
<span class="kw">fn</span> <span class="ident">append_terminated</span><span class="op"><</span><span class="ident">I</span>, <span class="ident">U</span><span class="op">></span>(<span class="kw-2">&mut</span> <span class="self">self</span>, <span class="ident">iter</span>: <span class="ident">I</span>, <span class="ident">term</span>: <span class="ident">U</span>)
<span class="kw">where</span>
<span class="ident">I</span>: <span class="ident">IntoIterator</span>,
<span class="ident">I::Item</span>: <span class="ident">ToTokens</span>,
<span class="ident">U</span>: <span class="ident">ToTokens</span>;
}
<span class="kw">impl</span> <span class="ident">TokenStreamExt</span> <span class="kw">for</span> <span class="ident">TokenStream</span> {
<span class="kw">fn</span> <span class="ident">append</span><span class="op"><</span><span class="ident">U</span><span class="op">></span>(<span class="kw-2">&mut</span> <span class="self">self</span>, <span class="ident">token</span>: <span class="ident">U</span>)
<span class="kw">where</span>
<span class="ident">U</span>: <span class="ident">Into</span><span class="op"><</span><span class="ident">TokenTree</span><span class="op">></span>,
{
<span class="self">self</span>.<span class="ident">extend</span>(<span class="ident">iter::once</span>(<span class="ident">token</span>.<span class="ident">into</span>()));
}
<span class="kw">fn</span> <span class="ident">append_all</span><span class="op"><</span><span class="ident">I</span><span class="op">></span>(<span class="kw-2">&mut</span> <span class="self">self</span>, <span class="ident">iter</span>: <span class="ident">I</span>)
<span class="kw">where</span>
<span class="ident">I</span>: <span class="ident">IntoIterator</span>,
<span class="ident">I::Item</span>: <span class="ident">ToTokens</span>,
{
<span class="kw">for</span> <span class="ident">token</span> <span class="kw">in</span> <span class="ident">iter</span> {
<span class="ident">token</span>.<span class="ident">to_tokens</span>(<span class="self">self</span>);
}
}
<span class="kw">fn</span> <span class="ident">append_separated</span><span class="op"><</span><span class="ident">I</span>, <span class="ident">U</span><span class="op">></span>(<span class="kw-2">&mut</span> <span class="self">self</span>, <span class="ident">iter</span>: <span class="ident">I</span>, <span class="ident">op</span>: <span class="ident">U</span>)
<span class="kw">where</span>
<span class="ident">I</span>: <span class="ident">IntoIterator</span>,
<span class="ident">I::Item</span>: <span class="ident">ToTokens</span>,
<span class="ident">U</span>: <span class="ident">ToTokens</span>,
{
<span class="kw">for</span> (<span class="ident">i</span>, <span class="ident">token</span>) <span class="kw">in</span> <span class="ident">iter</span>.<span class="ident">into_iter</span>().<span class="ident">enumerate</span>() {
<span class="kw">if</span> <span class="ident">i</span> <span class="op">></span> <span class="number">0</span> {
<span class="ident">op</span>.<span class="ident">to_tokens</span>(<span class="self">self</span>);
}
<span class="ident">token</span>.<span class="ident">to_tokens</span>(<span class="self">self</span>);
}
}
<span class="kw">fn</span> <span class="ident">append_terminated</span><span class="op"><</span><span class="ident">I</span>, <span class="ident">U</span><span class="op">></span>(<span class="kw-2">&mut</span> <span class="self">self</span>, <span class="ident">iter</span>: <span class="ident">I</span>, <span class="ident">term</span>: <span class="ident">U</span>)
<span class="kw">where</span>
<span class="ident">I</span>: <span class="ident">IntoIterator</span>,
<span class="ident">I::Item</span>: <span class="ident">ToTokens</span>,
<span class="ident">U</span>: <span class="ident">ToTokens</span>,
{
<span class="kw">for</span> <span class="ident">token</span> <span class="kw">in</span> <span class="ident">iter</span> {
<span class="ident">token</span>.<span class="ident">to_tokens</span>(<span class="self">self</span>);
<span class="ident">term</span>.<span class="ident">to_tokens</span>(<span class="self">self</span>);
}
}
}
<span class="kw">mod</span> <span class="ident">private</span> {
<span class="kw">use</span> <span class="ident">proc_macro2::TokenStream</span>;
<span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">Sealed</span> {}
<span class="kw">impl</span> <span class="ident">Sealed</span> <span class="kw">for</span> <span class="ident">TokenStream</span> {}
}
</code></pre></div>
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