| <!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 `/root/.cargo/registry/src/github.com-1ecc6299db9ec823/quote-1.0.28/src/to_tokens.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>to_tokens.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" href="../../normalize.css"><link rel="stylesheet" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../ayu.css" disabled><link rel="stylesheet" href="../../dark.css" disabled><link rel="stylesheet" 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="sidebar"><a class="sidebar-logo" href="../../quote/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../quote/index.html"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
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| </pre><pre class="rust"><code><span class="kw">use </span><span class="kw">super</span>::TokenStreamExt; |
| <span class="kw">use </span>core::iter; |
| <span class="kw">use </span>proc_macro2::{Group, Ident, Literal, Punct, Span, TokenStream, TokenTree}; |
| <span class="kw">use </span>std::borrow::Cow; |
| <span class="kw">use </span>std::rc::Rc; |
| |
| <span class="doccomment">/// Types that can be interpolated inside a `quote!` invocation. |
| /// |
| /// [`quote!`]: macro.quote.html |
| </span><span class="kw">pub trait </span>ToTokens { |
| <span class="doccomment">/// Write `self` to the given `TokenStream`. |
| /// |
| /// The token append methods provided by the [`TokenStreamExt`] extension |
| /// trait may be useful for implementing `ToTokens`. |
| /// |
| /// [`TokenStreamExt`]: trait.TokenStreamExt.html |
| /// |
| /// # Example |
| /// |
| /// Example implementation for a struct representing Rust paths like |
| /// `std::cmp::PartialEq`: |
| /// |
| /// ``` |
| /// use proc_macro2::{TokenTree, Spacing, Span, Punct, TokenStream}; |
| /// use quote::{TokenStreamExt, ToTokens}; |
| /// |
| /// pub struct Path { |
| /// pub global: bool, |
| /// pub segments: Vec<PathSegment>, |
| /// } |
| /// |
| /// impl ToTokens for Path { |
| /// fn to_tokens(&self, tokens: &mut TokenStream) { |
| /// for (i, segment) in self.segments.iter().enumerate() { |
| /// if i > 0 || self.global { |
| /// // Double colon `::` |
| /// tokens.append(Punct::new(':', Spacing::Joint)); |
| /// tokens.append(Punct::new(':', Spacing::Alone)); |
| /// } |
| /// segment.to_tokens(tokens); |
| /// } |
| /// } |
| /// } |
| /// # |
| /// # pub struct PathSegment; |
| /// # |
| /// # impl ToTokens for PathSegment { |
| /// # fn to_tokens(&self, tokens: &mut TokenStream) { |
| /// # unimplemented!() |
| /// # } |
| /// # } |
| /// ``` |
| </span><span class="kw">fn </span>to_tokens(<span class="kw-2">&</span><span class="self">self</span>, tokens: <span class="kw-2">&mut </span>TokenStream); |
| |
| <span class="doccomment">/// Convert `self` directly into a `TokenStream` object. |
| /// |
| /// This method is implicitly implemented using `to_tokens`, and acts as a |
| /// convenience method for consumers of the `ToTokens` trait. |
| </span><span class="kw">fn </span>to_token_stream(<span class="kw-2">&</span><span class="self">self</span>) -> TokenStream { |
| <span class="kw">let </span><span class="kw-2">mut </span>tokens = TokenStream::new(); |
| <span class="self">self</span>.to_tokens(<span class="kw-2">&mut </span>tokens); |
| tokens |
| } |
| |
| <span class="doccomment">/// Convert `self` directly into a `TokenStream` object. |
| /// |
| /// This method is implicitly implemented using `to_tokens`, and acts as a |
| /// convenience method for consumers of the `ToTokens` trait. |
| </span><span class="kw">fn </span>into_token_stream(<span class="self">self</span>) -> TokenStream |
| <span class="kw">where |
| </span><span class="self">Self</span>: Sized, |
| { |
| <span class="self">self</span>.to_token_stream() |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>, T: <span class="question-mark">?</span>Sized + ToTokens> ToTokens <span class="kw">for </span><span class="kw-2">&</span><span class="lifetime">'a </span>T { |
| <span class="kw">fn </span>to_tokens(<span class="kw-2">&</span><span class="self">self</span>, tokens: <span class="kw-2">&mut </span>TokenStream) { |
| (<span class="kw-2">**</span><span class="self">self</span>).to_tokens(tokens); |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>, T: <span class="question-mark">?</span>Sized + ToTokens> ToTokens <span class="kw">for </span><span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>T { |
| <span class="kw">fn </span>to_tokens(<span class="kw-2">&</span><span class="self">self</span>, tokens: <span class="kw-2">&mut </span>TokenStream) { |
| (<span class="kw-2">**</span><span class="self">self</span>).to_tokens(tokens); |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>, T: <span class="question-mark">?</span>Sized + ToOwned + ToTokens> ToTokens <span class="kw">for </span>Cow<<span class="lifetime">'a</span>, T> { |
| <span class="kw">fn </span>to_tokens(<span class="kw-2">&</span><span class="self">self</span>, tokens: <span class="kw-2">&mut </span>TokenStream) { |
| (<span class="kw-2">**</span><span class="self">self</span>).to_tokens(tokens); |
| } |
| } |
| |
| <span class="kw">impl</span><T: <span class="question-mark">?</span>Sized + ToTokens> ToTokens <span class="kw">for </span>Box<T> { |
| <span class="kw">fn </span>to_tokens(<span class="kw-2">&</span><span class="self">self</span>, tokens: <span class="kw-2">&mut </span>TokenStream) { |
| (<span class="kw-2">**</span><span class="self">self</span>).to_tokens(tokens); |
| } |
| } |
| |
| <span class="kw">impl</span><T: <span class="question-mark">?</span>Sized + ToTokens> ToTokens <span class="kw">for </span>Rc<T> { |
| <span class="kw">fn </span>to_tokens(<span class="kw-2">&</span><span class="self">self</span>, tokens: <span class="kw-2">&mut </span>TokenStream) { |
| (<span class="kw-2">**</span><span class="self">self</span>).to_tokens(tokens); |
| } |
| } |
| |
| <span class="kw">impl</span><T: ToTokens> ToTokens <span class="kw">for </span><span class="prelude-ty">Option</span><T> { |
| <span class="kw">fn </span>to_tokens(<span class="kw-2">&</span><span class="self">self</span>, tokens: <span class="kw-2">&mut </span>TokenStream) { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(<span class="kw-2">ref </span>t) = <span class="kw-2">*</span><span class="self">self </span>{ |
| t.to_tokens(tokens); |
| } |
| } |
| } |
| |
| <span class="kw">impl </span>ToTokens <span class="kw">for </span>str { |
| <span class="kw">fn </span>to_tokens(<span class="kw-2">&</span><span class="self">self</span>, tokens: <span class="kw-2">&mut </span>TokenStream) { |
| tokens.append(Literal::string(<span class="self">self</span>)); |
| } |
| } |
| |
| <span class="kw">impl </span>ToTokens <span class="kw">for </span>String { |
| <span class="kw">fn </span>to_tokens(<span class="kw-2">&</span><span class="self">self</span>, tokens: <span class="kw-2">&mut </span>TokenStream) { |
| <span class="self">self</span>.as_str().to_tokens(tokens); |
| } |
| } |
| |
| <span class="macro">macro_rules! </span>primitive { |
| ($(<span class="macro-nonterminal">$t</span>:ident => <span class="macro-nonterminal">$name</span>:ident)<span class="kw-2">*</span>) => { |
| $( |
| <span class="kw">impl </span>ToTokens <span class="kw">for </span><span class="macro-nonterminal">$t </span>{ |
| <span class="kw">fn </span>to_tokens(<span class="kw-2">&</span><span class="self">self</span>, tokens: <span class="kw-2">&mut </span>TokenStream) { |
| tokens.append(Literal::<span class="macro-nonterminal">$name</span>(<span class="kw-2">*</span><span class="self">self</span>)); |
| } |
| } |
| )* |
| }; |
| } |
| |
| <span class="macro">primitive! </span>{ |
| i8 => i8_suffixed |
| i16 => i16_suffixed |
| i32 => i32_suffixed |
| i64 => i64_suffixed |
| i128 => i128_suffixed |
| isize => isize_suffixed |
| |
| u8 => u8_suffixed |
| u16 => u16_suffixed |
| u32 => u32_suffixed |
| u64 => u64_suffixed |
| u128 => u128_suffixed |
| usize => usize_suffixed |
| |
| f32 => f32_suffixed |
| f64 => f64_suffixed |
| } |
| |
| <span class="kw">impl </span>ToTokens <span class="kw">for </span>char { |
| <span class="kw">fn </span>to_tokens(<span class="kw-2">&</span><span class="self">self</span>, tokens: <span class="kw-2">&mut </span>TokenStream) { |
| tokens.append(Literal::character(<span class="kw-2">*</span><span class="self">self</span>)); |
| } |
| } |
| |
| <span class="kw">impl </span>ToTokens <span class="kw">for </span>bool { |
| <span class="kw">fn </span>to_tokens(<span class="kw-2">&</span><span class="self">self</span>, tokens: <span class="kw-2">&mut </span>TokenStream) { |
| <span class="kw">let </span>word = <span class="kw">if </span><span class="kw-2">*</span><span class="self">self </span>{ <span class="string">"true" </span>} <span class="kw">else </span>{ <span class="string">"false" </span>}; |
| tokens.append(Ident::new(word, Span::call_site())); |
| } |
| } |
| |
| <span class="kw">impl </span>ToTokens <span class="kw">for </span>Group { |
| <span class="kw">fn </span>to_tokens(<span class="kw-2">&</span><span class="self">self</span>, tokens: <span class="kw-2">&mut </span>TokenStream) { |
| tokens.append(<span class="self">self</span>.clone()); |
| } |
| } |
| |
| <span class="kw">impl </span>ToTokens <span class="kw">for </span>Ident { |
| <span class="kw">fn </span>to_tokens(<span class="kw-2">&</span><span class="self">self</span>, tokens: <span class="kw-2">&mut </span>TokenStream) { |
| tokens.append(<span class="self">self</span>.clone()); |
| } |
| } |
| |
| <span class="kw">impl </span>ToTokens <span class="kw">for </span>Punct { |
| <span class="kw">fn </span>to_tokens(<span class="kw-2">&</span><span class="self">self</span>, tokens: <span class="kw-2">&mut </span>TokenStream) { |
| tokens.append(<span class="self">self</span>.clone()); |
| } |
| } |
| |
| <span class="kw">impl </span>ToTokens <span class="kw">for </span>Literal { |
| <span class="kw">fn </span>to_tokens(<span class="kw-2">&</span><span class="self">self</span>, tokens: <span class="kw-2">&mut </span>TokenStream) { |
| tokens.append(<span class="self">self</span>.clone()); |
| } |
| } |
| |
| <span class="kw">impl </span>ToTokens <span class="kw">for </span>TokenTree { |
| <span class="kw">fn </span>to_tokens(<span class="kw-2">&</span><span class="self">self</span>, dst: <span class="kw-2">&mut </span>TokenStream) { |
| dst.append(<span class="self">self</span>.clone()); |
| } |
| } |
| |
| <span class="kw">impl </span>ToTokens <span class="kw">for </span>TokenStream { |
| <span class="kw">fn </span>to_tokens(<span class="kw-2">&</span><span class="self">self</span>, dst: <span class="kw-2">&mut </span>TokenStream) { |
| dst.extend(iter::once(<span class="self">self</span>.clone())); |
| } |
| |
| <span class="kw">fn </span>into_token_stream(<span class="self">self</span>) -> TokenStream { |
| <span class="self">self |
| </span>} |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="quote" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
