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| <span id="996"> 996</span> |
| <span id="997"> 997</span> |
| <span id="998"> 998</span> |
| <span id="999"> 999</span> |
| <span id="1000">1000</span> |
| <span id="1001">1001</span> |
| <span id="1002">1002</span> |
| <span id="1003">1003</span> |
| <span id="1004">1004</span> |
| <span id="1005">1005</span> |
| <span id="1006">1006</span> |
| <span id="1007">1007</span> |
| <span id="1008">1008</span> |
| <span id="1009">1009</span> |
| <span id="1010">1010</span> |
| <span id="1011">1011</span> |
| <span id="1012">1012</span> |
| <span id="1013">1013</span> |
| </pre><pre class="rust"><code><span class="doccomment">//! Tokens representing Rust punctuation, keywords, and delimiters.</span> |
| <span class="doccomment">//!</span> |
| <span class="doccomment">//! The type names in this module can be difficult to keep straight, so we</span> |
| <span class="doccomment">//! prefer to use the [`Token!`] macro instead. This is a type-macro that</span> |
| <span class="doccomment">//! expands to the token type of the given token.</span> |
| <span class="doccomment">//!</span> |
| <span class="doccomment">//! [`Token!`]: crate::Token</span> |
| <span class="doccomment">//!</span> |
| <span class="doccomment">//! # Example</span> |
| <span class="doccomment">//!</span> |
| <span class="doccomment">//! The [`ItemStatic`] syntax tree node is defined like this.</span> |
| <span class="doccomment">//!</span> |
| <span class="doccomment">//! [`ItemStatic`]: crate::ItemStatic</span> |
| <span class="doccomment">//!</span> |
| <span class="doccomment">//! ```</span> |
| <span class="doccomment">//! # use syn::{Attribute, Expr, Ident, Token, Type, Visibility};</span> |
| <span class="doccomment">//! #</span> |
| <span class="doccomment">//! pub struct ItemStatic {</span> |
| <span class="doccomment">//! pub attrs: Vec<Attribute>,</span> |
| <span class="doccomment">//! pub vis: Visibility,</span> |
| <span class="doccomment">//! pub static_token: Token![static],</span> |
| <span class="doccomment">//! pub mutability: Option<Token![mut]>,</span> |
| <span class="doccomment">//! pub ident: Ident,</span> |
| <span class="doccomment">//! pub colon_token: Token![:],</span> |
| <span class="doccomment">//! pub ty: Box<Type>,</span> |
| <span class="doccomment">//! pub eq_token: Token![=],</span> |
| <span class="doccomment">//! pub expr: Box<Expr>,</span> |
| <span class="doccomment">//! pub semi_token: Token![;],</span> |
| <span class="doccomment">//! }</span> |
| <span class="doccomment">//! ```</span> |
| <span class="doccomment">//!</span> |
| <span class="doccomment">//! # Parsing</span> |
| <span class="doccomment">//!</span> |
| <span class="doccomment">//! Keywords and punctuation can be parsed through the [`ParseStream::parse`]</span> |
| <span class="doccomment">//! method. Delimiter tokens are parsed using the [`parenthesized!`],</span> |
| <span class="doccomment">//! [`bracketed!`] and [`braced!`] macros.</span> |
| <span class="doccomment">//!</span> |
| <span class="doccomment">//! [`ParseStream::parse`]: crate::parse::ParseBuffer::parse()</span> |
| <span class="doccomment">//! [`parenthesized!`]: crate::parenthesized!</span> |
| <span class="doccomment">//! [`bracketed!`]: crate::bracketed!</span> |
| <span class="doccomment">//! [`braced!`]: crate::braced!</span> |
| <span class="doccomment">//!</span> |
| <span class="doccomment">//! ```</span> |
| <span class="doccomment">//! use syn::{Attribute, Result};</span> |
| <span class="doccomment">//! use syn::parse::{Parse, ParseStream};</span> |
| <span class="doccomment">//! #</span> |
| <span class="doccomment">//! # enum ItemStatic {}</span> |
| <span class="doccomment">//!</span> |
| <span class="doccomment">//! // Parse the ItemStatic struct shown above.</span> |
| <span class="doccomment">//! impl Parse for ItemStatic {</span> |
| <span class="doccomment">//! fn parse(input: ParseStream) -> Result<Self> {</span> |
| <span class="doccomment">//! # use syn::ItemStatic;</span> |
| <span class="doccomment">//! # fn parse(input: ParseStream) -> Result<ItemStatic> {</span> |
| <span class="doccomment">//! Ok(ItemStatic {</span> |
| <span class="doccomment">//! attrs: input.call(Attribute::parse_outer)?,</span> |
| <span class="doccomment">//! vis: input.parse()?,</span> |
| <span class="doccomment">//! static_token: input.parse()?,</span> |
| <span class="doccomment">//! mutability: input.parse()?,</span> |
| <span class="doccomment">//! ident: input.parse()?,</span> |
| <span class="doccomment">//! colon_token: input.parse()?,</span> |
| <span class="doccomment">//! ty: input.parse()?,</span> |
| <span class="doccomment">//! eq_token: input.parse()?,</span> |
| <span class="doccomment">//! expr: input.parse()?,</span> |
| <span class="doccomment">//! semi_token: input.parse()?,</span> |
| <span class="doccomment">//! })</span> |
| <span class="doccomment">//! # }</span> |
| <span class="doccomment">//! # unimplemented!()</span> |
| <span class="doccomment">//! }</span> |
| <span class="doccomment">//! }</span> |
| <span class="doccomment">//! ```</span> |
| <span class="doccomment">//!</span> |
| <span class="doccomment">//! # Other operations</span> |
| <span class="doccomment">//!</span> |
| <span class="doccomment">//! Every keyword and punctuation token supports the following operations.</span> |
| <span class="doccomment">//!</span> |
| <span class="doccomment">//! - [Peeking] — `input.peek(Token![...])`</span> |
| <span class="doccomment">//!</span> |
| <span class="doccomment">//! - [Parsing] — `input.parse::<Token![...]>()?`</span> |
| <span class="doccomment">//!</span> |
| <span class="doccomment">//! - [Printing] — `quote!( ... #the_token ... )`</span> |
| <span class="doccomment">//!</span> |
| <span class="doccomment">//! - Construction from a [`Span`] — `let the_token = Token`</span> |
| <span class="doccomment">//!</span> |
| <span class="doccomment">//! - Field access to its span — `let sp = the_token.span`</span> |
| <span class="doccomment">//!</span> |
| <span class="doccomment">//! [Peeking]: crate::parse::ParseBuffer::peek()</span> |
| <span class="doccomment">//! [Parsing]: crate::parse::ParseBuffer::parse()</span> |
| <span class="doccomment">//! [Printing]: https://docs.rs/quote/1.0/quote/trait.ToTokens.html</span> |
| <span class="doccomment">//! [`Span`]: https://docs.rs/proc-macro2/1.0/proc_macro2/struct.Span.html</span> |
| |
| <span class="kw">use</span> <span class="ident"><span class="self">self</span>::private::WithSpan</span>; |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)]</span> |
| <span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::buffer::Cursor</span>; |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)]</span> |
| <span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::error::Result</span>; |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)]</span> |
| <span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::lifetime::Lifetime</span>; |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)]</span> |
| <span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::lit</span>::{<span class="ident">Lit</span>, <span class="ident">LitBool</span>, <span class="ident">LitByte</span>, <span class="ident">LitByteStr</span>, <span class="ident">LitChar</span>, <span class="ident">LitFloat</span>, <span class="ident">LitInt</span>, <span class="ident">LitStr</span>}; |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)]</span> |
| <span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::lookahead</span>; |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)]</span> |
| <span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::parse</span>::{<span class="ident">Parse</span>, <span class="ident">ParseStream</span>}; |
| <span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::span::IntoSpans</span>; |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">any</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>, <span class="ident">feature</span> <span class="op">=</span> <span class="string">"printing"</span>))]</span> |
| <span class="kw">use</span> <span class="ident">proc_macro2::Ident</span>; |
| <span class="kw">use</span> <span class="ident">proc_macro2::Span</span>; |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"printing"</span>)]</span> |
| <span class="kw">use</span> <span class="ident">proc_macro2::TokenStream</span>; |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)]</span> |
| <span class="kw">use</span> <span class="ident">proc_macro2</span>::{<span class="ident">Delimiter</span>, <span class="ident">Literal</span>, <span class="ident">Punct</span>, <span class="ident">TokenTree</span>}; |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"printing"</span>)]</span> |
| <span class="kw">use</span> <span class="ident">quote</span>::{<span class="ident">ToTokens</span>, <span class="ident">TokenStreamExt</span>}; |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"extra-traits"</span>)]</span> |
| <span class="kw">use</span> <span class="ident">std::cmp</span>; |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"extra-traits"</span>)]</span> |
| <span class="kw">use</span> <span class="ident">std::fmt</span>::{<span class="self">self</span>, <span class="ident">Debug</span>}; |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"extra-traits"</span>)]</span> |
| <span class="kw">use</span> <span class="ident">std::hash</span>::{<span class="ident">Hash</span>, <span class="ident">Hasher</span>}; |
| <span class="kw">use</span> <span class="ident">std::ops</span>::{<span class="ident">Deref</span>, <span class="ident">DerefMut</span>}; |
| |
| <span class="doccomment">/// Marker trait for types that represent single tokens.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// This trait is sealed and cannot be implemented for types outside of Syn.</span> |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">Token</span>: <span class="ident">private::Sealed</span> { |
| <span class="comment">// Not public API.</span> |
| <span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span> |
| <span class="kw">fn</span> <span class="ident">peek</span>(<span class="ident">cursor</span>: <span class="ident">Cursor</span>) -> <span class="ident">bool</span>; |
| |
| <span class="comment">// Not public API.</span> |
| <span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span> |
| <span class="kw">fn</span> <span class="ident">display</span>() -> <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span>; |
| } |
| |
| <span class="kw">mod</span> <span class="ident">private</span> { |
| <span class="kw">use</span> <span class="ident">proc_macro2::Span</span>; |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">Sealed</span> {} |
| |
| <span class="doccomment">/// Support writing `token.span` rather than `token.spans[0]` on tokens that</span> |
| <span class="doccomment">/// hold a single span.</span> |
| <span class="attribute">#[<span class="ident">repr</span>(<span class="ident">C</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">WithSpan</span> { |
| <span class="kw">pub</span> <span class="ident">span</span>: <span class="ident">Span</span>, |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)]</span> |
| <span class="kw">impl</span> <span class="ident">private::Sealed</span> <span class="kw">for</span> <span class="ident">Ident</span> {} |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)]</span> |
| <span class="kw">fn</span> <span class="ident">peek_impl</span>(<span class="ident">cursor</span>: <span class="ident">Cursor</span>, <span class="ident">peek</span>: <span class="kw">fn</span>(<span class="ident">ParseStream</span>) -> <span class="ident">bool</span>) -> <span class="ident">bool</span> { |
| <span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::parse::Unexpected</span>; |
| <span class="kw">use</span> <span class="ident">std::cell::Cell</span>; |
| <span class="kw">use</span> <span class="ident">std::rc::Rc</span>; |
| |
| <span class="kw">let</span> <span class="ident">scope</span> <span class="op">=</span> <span class="ident">Span::call_site</span>(); |
| <span class="kw">let</span> <span class="ident">unexpected</span> <span class="op">=</span> <span class="ident">Rc::new</span>(<span class="ident">Cell::new</span>(<span class="ident">Unexpected::None</span>)); |
| <span class="kw">let</span> <span class="ident">buffer</span> <span class="op">=</span> <span class="ident"><span class="kw">crate</span>::parse::new_parse_buffer</span>(<span class="ident">scope</span>, <span class="ident">cursor</span>, <span class="ident">unexpected</span>); |
| <span class="ident">peek</span>(<span class="kw-2">&</span><span class="ident">buffer</span>) |
| } |
| |
| <span class="macro">macro_rules!</span> <span class="ident">impl_token</span> { |
| (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">display</span>:<span class="ident">tt</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ty</span>) => { |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)]</span> |
| <span class="kw">impl</span> <span class="ident">Token</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="kw">fn</span> <span class="ident">peek</span>(<span class="ident">cursor</span>: <span class="ident">Cursor</span>) -> <span class="ident">bool</span> { |
| <span class="kw">fn</span> <span class="ident">peek</span>(<span class="ident">input</span>: <span class="ident">ParseStream</span>) -> <span class="ident">bool</span> { |
| <span class="op"><</span><span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> <span class="kw">as</span> <span class="ident">Parse</span><span class="op">></span><span class="ident">::parse</span>(<span class="ident">input</span>).<span class="ident">is_ok</span>() |
| } |
| <span class="ident">peek_impl</span>(<span class="ident">cursor</span>, <span class="ident">peek</span>) |
| } |
| |
| <span class="kw">fn</span> <span class="ident">display</span>() -> <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> { |
| <span class="macro-nonterminal">$</span><span class="macro-nonterminal">display</span> |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)]</span> |
| <span class="kw">impl</span> <span class="ident">private::Sealed</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> {} |
| }; |
| } |
| |
| <span class="macro">impl_token!</span>(<span class="string">"lifetime"</span> <span class="ident">Lifetime</span>); |
| <span class="macro">impl_token!</span>(<span class="string">"literal"</span> <span class="ident">Lit</span>); |
| <span class="macro">impl_token!</span>(<span class="string">"string literal"</span> <span class="ident">LitStr</span>); |
| <span class="macro">impl_token!</span>(<span class="string">"byte string literal"</span> <span class="ident">LitByteStr</span>); |
| <span class="macro">impl_token!</span>(<span class="string">"byte literal"</span> <span class="ident">LitByte</span>); |
| <span class="macro">impl_token!</span>(<span class="string">"character literal"</span> <span class="ident">LitChar</span>); |
| <span class="macro">impl_token!</span>(<span class="string">"integer literal"</span> <span class="ident">LitInt</span>); |
| <span class="macro">impl_token!</span>(<span class="string">"floating point literal"</span> <span class="ident">LitFloat</span>); |
| <span class="macro">impl_token!</span>(<span class="string">"boolean literal"</span> <span class="ident">LitBool</span>); |
| <span class="macro">impl_token!</span>(<span class="string">"group token"</span> <span class="ident">proc_macro2::Group</span>); |
| |
| <span class="macro">macro_rules!</span> <span class="ident">impl_low_level_token</span> { |
| (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">display</span>:<span class="ident">tt</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ty</span>:<span class="ident">ident</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">get</span>:<span class="ident">ident</span>) => { |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)]</span> |
| <span class="kw">impl</span> <span class="ident">Token</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ty</span> { |
| <span class="kw">fn</span> <span class="ident">peek</span>(<span class="ident">cursor</span>: <span class="ident">Cursor</span>) -> <span class="ident">bool</span> { |
| <span class="ident">cursor</span>.<span class="macro-nonterminal">$</span><span class="macro-nonterminal">get</span>().<span class="ident">is_some</span>() |
| } |
| |
| <span class="kw">fn</span> <span class="ident">display</span>() -> <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> { |
| <span class="macro-nonterminal">$</span><span class="macro-nonterminal">display</span> |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)]</span> |
| <span class="kw">impl</span> <span class="ident">private::Sealed</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">ty</span> {} |
| }; |
| } |
| |
| <span class="macro">impl_low_level_token!</span>(<span class="string">"punctuation token"</span> <span class="ident">Punct</span> <span class="ident">punct</span>); |
| <span class="macro">impl_low_level_token!</span>(<span class="string">"literal"</span> <span class="ident">Literal</span> <span class="ident">literal</span>); |
| <span class="macro">impl_low_level_token!</span>(<span class="string">"token"</span> <span class="ident">TokenTree</span> <span class="ident">token_tree</span>); |
| |
| <span class="comment">// Not public API.</span> |
| <span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span> |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">CustomToken</span> { |
| <span class="kw">fn</span> <span class="ident">peek</span>(<span class="ident">cursor</span>: <span class="ident">Cursor</span>) -> <span class="ident">bool</span>; |
| <span class="kw">fn</span> <span class="ident">display</span>() -> <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span>; |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)]</span> |
| <span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">CustomToken</span><span class="op">></span> <span class="ident">private::Sealed</span> <span class="kw">for</span> <span class="ident">T</span> {} |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)]</span> |
| <span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">CustomToken</span><span class="op">></span> <span class="ident">Token</span> <span class="kw">for</span> <span class="ident">T</span> { |
| <span class="kw">fn</span> <span class="ident">peek</span>(<span class="ident">cursor</span>: <span class="ident">Cursor</span>) -> <span class="ident">bool</span> { |
| <span class="op"><</span><span class="self">Self</span> <span class="kw">as</span> <span class="ident">CustomToken</span><span class="op">></span><span class="ident">::peek</span>(<span class="ident">cursor</span>) |
| } |
| |
| <span class="kw">fn</span> <span class="ident">display</span>() -> <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> { |
| <span class="op"><</span><span class="self">Self</span> <span class="kw">as</span> <span class="ident">CustomToken</span><span class="op">></span><span class="ident">::display</span>() |
| } |
| } |
| |
| <span class="macro">macro_rules!</span> <span class="ident">define_keywords</span> { |
| ($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">token</span>:<span class="ident">tt</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span> <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">doc</span>:<span class="ident">meta</span>]</span>)<span class="kw-2">*</span>) => { |
| $( |
| <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">doc</span>]</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// Don't try to remember the name of this type &mdash; use the</span> |
| <span class="doccomment">/// [`Token!`] macro instead.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// [`Token!`]: crate::token</span> |
| <span class="kw">pub</span> <span class="kw">struct</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="kw">pub</span> <span class="ident">span</span>: <span class="ident">Span</span>, |
| } |
| |
| <span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span> |
| <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">non_snake_case</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span><span class="op"><</span><span class="ident">S</span>: <span class="ident">IntoSpans</span><span class="op"><</span>[<span class="ident">Span</span>; <span class="number">1</span>]<span class="op">></span><span class="op">></span>(<span class="ident">span</span>: <span class="ident">S</span>) -> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="ident">span</span>: <span class="ident">span</span>.<span class="ident">into_spans</span>()[<span class="number">0</span>], |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">std::default::Default</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="kw">fn</span> <span class="ident">default</span>() -> <span class="self">Self</span> { |
| <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="ident">span</span>: <span class="ident">Span::call_site</span>(), |
| } |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"clone-impls"</span>)]</span> |
| <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">doc_cfg</span>, <span class="ident">doc</span>(<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"clone-impls"</span>)))]</span> |
| <span class="kw">impl</span> <span class="ident">Copy</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> {} |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"clone-impls"</span>)]</span> |
| <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">doc_cfg</span>, <span class="ident">doc</span>(<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"clone-impls"</span>)))]</span> |
| <span class="kw">impl</span> <span class="ident">Clone</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="kw">fn</span> <span class="ident">clone</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="self">Self</span> { |
| <span class="kw-2">*</span><span class="self">self</span> |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"extra-traits"</span>)]</span> |
| <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">doc_cfg</span>, <span class="ident">doc</span>(<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"extra-traits"</span>)))]</span> |
| <span class="kw">impl</span> <span class="ident">Debug</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&mut</span> <span class="ident">fmt::Formatter</span>) -> <span class="ident">fmt::Result</span> { |
| <span class="ident">f</span>.<span class="ident">write_str</span>(<span class="macro">stringify!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>)) |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"extra-traits"</span>)]</span> |
| <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">doc_cfg</span>, <span class="ident">doc</span>(<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"extra-traits"</span>)))]</span> |
| <span class="kw">impl</span> <span class="ident">cmp::Eq</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> {} |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"extra-traits"</span>)]</span> |
| <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">doc_cfg</span>, <span class="ident">doc</span>(<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"extra-traits"</span>)))]</span> |
| <span class="kw">impl</span> <span class="ident">PartialEq</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="kw">fn</span> <span class="ident">eq</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">_other</span>: <span class="kw-2">&</span><span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>) -> <span class="ident">bool</span> { |
| <span class="bool-val">true</span> |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"extra-traits"</span>)]</span> |
| <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">doc_cfg</span>, <span class="ident">doc</span>(<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"extra-traits"</span>)))]</span> |
| <span class="kw">impl</span> <span class="ident">Hash</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="kw">fn</span> <span class="ident">hash</span><span class="op"><</span><span class="ident">H</span>: <span class="ident">Hasher</span><span class="op">></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">_state</span>: <span class="kw-2">&mut</span> <span class="ident">H</span>) {} |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"printing"</span>)]</span> |
| <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">doc_cfg</span>, <span class="ident">doc</span>(<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"printing"</span>)))]</span> |
| <span class="kw">impl</span> <span class="ident">ToTokens</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="kw">fn</span> <span class="ident">to_tokens</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">tokens</span>: <span class="kw-2">&mut</span> <span class="ident">TokenStream</span>) { |
| <span class="ident">printing::keyword</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">token</span>, <span class="self">self</span>.<span class="ident">span</span>, <span class="ident">tokens</span>); |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)]</span> |
| <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">doc_cfg</span>, <span class="ident">doc</span>(<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)))]</span> |
| <span class="kw">impl</span> <span class="ident">Parse</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="kw">fn</span> <span class="ident">parse</span>(<span class="ident">input</span>: <span class="ident">ParseStream</span>) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="self">Self</span><span class="op">></span> { |
| <span class="prelude-val">Ok</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="ident">span</span>: <span class="ident">parsing::keyword</span>(<span class="ident">input</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">token</span>)<span class="question-mark">?</span>, |
| }) |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)]</span> |
| <span class="kw">impl</span> <span class="ident">Token</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="kw">fn</span> <span class="ident">peek</span>(<span class="ident">cursor</span>: <span class="ident">Cursor</span>) -> <span class="ident">bool</span> { |
| <span class="ident">parsing::peek_keyword</span>(<span class="ident">cursor</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">token</span>) |
| } |
| |
| <span class="kw">fn</span> <span class="ident">display</span>() -> <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> { |
| <span class="macro">concat!</span>(<span class="string">"`"</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">token</span>, <span class="string">"`"</span>) |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)]</span> |
| <span class="kw">impl</span> <span class="ident">private::Sealed</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> {} |
| )<span class="op">*</span> |
| }; |
| } |
| |
| <span class="macro">macro_rules!</span> <span class="ident">impl_deref_if_len_is_1</span> { |
| (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span><span class="op">/</span><span class="number">1</span>) => { |
| <span class="kw">impl</span> <span class="ident">Deref</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="kw">type</span> <span class="ident">Target</span> <span class="op">=</span> <span class="ident">WithSpan</span>; |
| |
| <span class="kw">fn</span> <span class="ident">deref</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span><span class="ident"><span class="self">Self</span>::Target</span> { |
| <span class="kw">unsafe</span> { <span class="kw-2">&</span><span class="kw-2">*</span>(<span class="self">self</span> <span class="kw">as</span> <span class="kw-2">*const</span> <span class="self">Self</span> <span class="kw">as</span> <span class="kw-2">*const</span> <span class="ident">WithSpan</span>) } |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">DerefMut</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="kw">fn</span> <span class="ident">deref_mut</span>(<span class="kw-2">&mut</span> <span class="self">self</span>) -> <span class="kw-2">&mut</span> <span class="ident"><span class="self">Self</span>::Target</span> { |
| <span class="kw">unsafe</span> { <span class="kw-2">&mut</span> <span class="kw-2">*</span>(<span class="self">self</span> <span class="kw">as</span> <span class="kw-2">*mut</span> <span class="self">Self</span> <span class="kw">as</span> <span class="kw-2">*mut</span> <span class="ident">WithSpan</span>) } |
| } |
| } |
| }; |
| |
| (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span><span class="op">/</span><span class="macro-nonterminal">$</span><span class="macro-nonterminal">len</span>:<span class="ident">tt</span>) => {}; |
| } |
| |
| <span class="macro">macro_rules!</span> <span class="ident">define_punctuation_structs</span> { |
| ($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">token</span>:<span class="ident">tt</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span><span class="op">/</span><span class="macro-nonterminal">$</span><span class="macro-nonterminal">len</span>:<span class="ident">tt</span> <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">doc</span>:<span class="ident">meta</span>]</span>)<span class="kw-2">*</span>) => { |
| $( |
| <span class="attribute">#[<span class="ident">repr</span>(<span class="ident">C</span>)]</span> |
| <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">doc</span>]</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// Don't try to remember the name of this type &mdash; use the</span> |
| <span class="doccomment">/// [`Token!`] macro instead.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// [`Token!`]: crate::token</span> |
| <span class="kw">pub</span> <span class="kw">struct</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="kw">pub</span> <span class="ident">spans</span>: [<span class="ident">Span</span>; <span class="macro-nonterminal">$</span><span class="macro-nonterminal">len</span>], |
| } |
| |
| <span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span> |
| <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">non_snake_case</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span><span class="op"><</span><span class="ident">S</span>: <span class="ident">IntoSpans</span><span class="op"><</span>[<span class="ident">Span</span>; <span class="macro-nonterminal">$</span><span class="macro-nonterminal">len</span>]<span class="op">></span><span class="op">></span>(<span class="ident">spans</span>: <span class="ident">S</span>) -> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="ident">spans</span>: <span class="ident">spans</span>.<span class="ident">into_spans</span>(), |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">std::default::Default</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="kw">fn</span> <span class="ident">default</span>() -> <span class="self">Self</span> { |
| <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="ident">spans</span>: [<span class="ident">Span::call_site</span>(); <span class="macro-nonterminal">$</span><span class="macro-nonterminal">len</span>], |
| } |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"clone-impls"</span>)]</span> |
| <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">doc_cfg</span>, <span class="ident">doc</span>(<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"clone-impls"</span>)))]</span> |
| <span class="kw">impl</span> <span class="ident">Copy</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> {} |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"clone-impls"</span>)]</span> |
| <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">doc_cfg</span>, <span class="ident">doc</span>(<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"clone-impls"</span>)))]</span> |
| <span class="kw">impl</span> <span class="ident">Clone</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="kw">fn</span> <span class="ident">clone</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="self">Self</span> { |
| <span class="kw-2">*</span><span class="self">self</span> |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"extra-traits"</span>)]</span> |
| <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">doc_cfg</span>, <span class="ident">doc</span>(<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"extra-traits"</span>)))]</span> |
| <span class="kw">impl</span> <span class="ident">Debug</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</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="ident">f</span>.<span class="ident">write_str</span>(<span class="macro">stringify!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>)) |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"extra-traits"</span>)]</span> |
| <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">doc_cfg</span>, <span class="ident">doc</span>(<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"extra-traits"</span>)))]</span> |
| <span class="kw">impl</span> <span class="ident">cmp::Eq</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> {} |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"extra-traits"</span>)]</span> |
| <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">doc_cfg</span>, <span class="ident">doc</span>(<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"extra-traits"</span>)))]</span> |
| <span class="kw">impl</span> <span class="ident">PartialEq</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="kw">fn</span> <span class="ident">eq</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">_other</span>: <span class="kw-2">&</span><span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>) -> <span class="ident">bool</span> { |
| <span class="bool-val">true</span> |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"extra-traits"</span>)]</span> |
| <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">doc_cfg</span>, <span class="ident">doc</span>(<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"extra-traits"</span>)))]</span> |
| <span class="kw">impl</span> <span class="ident">Hash</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="kw">fn</span> <span class="ident">hash</span><span class="op"><</span><span class="ident">H</span>: <span class="ident">Hasher</span><span class="op">></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">_state</span>: <span class="kw-2">&mut</span> <span class="ident">H</span>) {} |
| } |
| |
| <span class="macro">impl_deref_if_len_is_1!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span><span class="op">/</span><span class="macro-nonterminal">$</span><span class="macro-nonterminal">len</span>); |
| )<span class="op">*</span> |
| }; |
| } |
| |
| <span class="macro">macro_rules!</span> <span class="ident">define_punctuation</span> { |
| ($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">token</span>:<span class="ident">tt</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span><span class="op">/</span><span class="macro-nonterminal">$</span><span class="macro-nonterminal">len</span>:<span class="ident">tt</span> <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">doc</span>:<span class="ident">meta</span>]</span>)<span class="kw-2">*</span>) => { |
| $( |
| <span class="macro">define_punctuation_structs!</span> { |
| <span class="macro-nonterminal">$</span><span class="macro-nonterminal">token</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span><span class="op">/</span><span class="macro-nonterminal">$</span><span class="macro-nonterminal">len</span> <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">doc</span>]</span> |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"printing"</span>)]</span> |
| <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">doc_cfg</span>, <span class="ident">doc</span>(<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"printing"</span>)))]</span> |
| <span class="kw">impl</span> <span class="ident">ToTokens</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="kw">fn</span> <span class="ident">to_tokens</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">tokens</span>: <span class="kw-2">&mut</span> <span class="ident">TokenStream</span>) { |
| <span class="ident">printing::punct</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">token</span>, <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">spans</span>, <span class="ident">tokens</span>); |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)]</span> |
| <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">doc_cfg</span>, <span class="ident">doc</span>(<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)))]</span> |
| <span class="kw">impl</span> <span class="ident">Parse</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="kw">fn</span> <span class="ident">parse</span>(<span class="ident">input</span>: <span class="ident">ParseStream</span>) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="self">Self</span><span class="op">></span> { |
| <span class="prelude-val">Ok</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="ident">spans</span>: <span class="ident">parsing::punct</span>(<span class="ident">input</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">token</span>)<span class="question-mark">?</span>, |
| }) |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)]</span> |
| <span class="kw">impl</span> <span class="ident">Token</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="kw">fn</span> <span class="ident">peek</span>(<span class="ident">cursor</span>: <span class="ident">Cursor</span>) -> <span class="ident">bool</span> { |
| <span class="ident">parsing::peek_punct</span>(<span class="ident">cursor</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">token</span>) |
| } |
| |
| <span class="kw">fn</span> <span class="ident">display</span>() -> <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> { |
| <span class="macro">concat!</span>(<span class="string">"`"</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">token</span>, <span class="string">"`"</span>) |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)]</span> |
| <span class="kw">impl</span> <span class="ident">private::Sealed</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> {} |
| )<span class="op">*</span> |
| }; |
| } |
| |
| <span class="macro">macro_rules!</span> <span class="ident">define_delimiters</span> { |
| ($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">token</span>:<span class="ident">tt</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span> <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">doc</span>:<span class="ident">meta</span>]</span>)<span class="kw-2">*</span>) => { |
| $( |
| <span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">doc</span>]</span> |
| <span class="kw">pub</span> <span class="kw">struct</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="kw">pub</span> <span class="ident">span</span>: <span class="ident">Span</span>, |
| } |
| |
| <span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span> |
| <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">non_snake_case</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span><span class="op"><</span><span class="ident">S</span>: <span class="ident">IntoSpans</span><span class="op"><</span>[<span class="ident">Span</span>; <span class="number">1</span>]<span class="op">></span><span class="op">></span>(<span class="ident">span</span>: <span class="ident">S</span>) -> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="ident">span</span>: <span class="ident">span</span>.<span class="ident">into_spans</span>()[<span class="number">0</span>], |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">std::default::Default</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="kw">fn</span> <span class="ident">default</span>() -> <span class="self">Self</span> { |
| <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="ident">span</span>: <span class="ident">Span::call_site</span>(), |
| } |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"clone-impls"</span>)]</span> |
| <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">doc_cfg</span>, <span class="ident">doc</span>(<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"clone-impls"</span>)))]</span> |
| <span class="kw">impl</span> <span class="ident">Copy</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> {} |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"clone-impls"</span>)]</span> |
| <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">doc_cfg</span>, <span class="ident">doc</span>(<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"clone-impls"</span>)))]</span> |
| <span class="kw">impl</span> <span class="ident">Clone</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="kw">fn</span> <span class="ident">clone</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="self">Self</span> { |
| <span class="kw-2">*</span><span class="self">self</span> |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"extra-traits"</span>)]</span> |
| <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">doc_cfg</span>, <span class="ident">doc</span>(<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"extra-traits"</span>)))]</span> |
| <span class="kw">impl</span> <span class="ident">Debug</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&mut</span> <span class="ident">fmt::Formatter</span>) -> <span class="ident">fmt::Result</span> { |
| <span class="ident">f</span>.<span class="ident">write_str</span>(<span class="macro">stringify!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>)) |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"extra-traits"</span>)]</span> |
| <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">doc_cfg</span>, <span class="ident">doc</span>(<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"extra-traits"</span>)))]</span> |
| <span class="kw">impl</span> <span class="ident">cmp::Eq</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> {} |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"extra-traits"</span>)]</span> |
| <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">doc_cfg</span>, <span class="ident">doc</span>(<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"extra-traits"</span>)))]</span> |
| <span class="kw">impl</span> <span class="ident">PartialEq</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="kw">fn</span> <span class="ident">eq</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">_other</span>: <span class="kw-2">&</span><span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>) -> <span class="ident">bool</span> { |
| <span class="bool-val">true</span> |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"extra-traits"</span>)]</span> |
| <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">doc_cfg</span>, <span class="ident">doc</span>(<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"extra-traits"</span>)))]</span> |
| <span class="kw">impl</span> <span class="ident">Hash</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="kw">fn</span> <span class="ident">hash</span><span class="op"><</span><span class="ident">H</span>: <span class="ident">Hasher</span><span class="op">></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">_state</span>: <span class="kw-2">&mut</span> <span class="ident">H</span>) {} |
| } |
| |
| <span class="kw">impl</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> { |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"printing"</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">surround</span><span class="op"><</span><span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">tokens</span>: <span class="kw-2">&mut</span> <span class="ident">TokenStream</span>, <span class="ident">f</span>: <span class="ident">F</span>) |
| <span class="kw">where</span> |
| <span class="ident">F</span>: <span class="ident">FnOnce</span>(<span class="kw-2">&mut</span> <span class="ident">TokenStream</span>), |
| { |
| <span class="ident">printing::delim</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">token</span>, <span class="self">self</span>.<span class="ident">span</span>, <span class="ident">tokens</span>, <span class="ident">f</span>); |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)]</span> |
| <span class="kw">impl</span> <span class="ident">private::Sealed</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span> {} |
| )<span class="op">*</span> |
| }; |
| } |
| |
| <span class="macro">define_punctuation_structs!</span> { |
| <span class="string">"_"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Underscore</span><span class="op">/</span><span class="number">1</span> <span class="doccomment">/// `_`</span> |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"printing"</span>)]</span> |
| <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">doc_cfg</span>, <span class="ident">doc</span>(<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"printing"</span>)))]</span> |
| <span class="kw">impl</span> <span class="ident">ToTokens</span> <span class="kw">for</span> <span class="ident">Underscore</span> { |
| <span class="kw">fn</span> <span class="ident">to_tokens</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">tokens</span>: <span class="kw-2">&mut</span> <span class="ident">TokenStream</span>) { |
| <span class="ident">tokens</span>.<span class="ident">append</span>(<span class="ident">Ident::new</span>(<span class="string">"_"</span>, <span class="self">self</span>.<span class="ident">span</span>)); |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)]</span> |
| <span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">doc_cfg</span>, <span class="ident">doc</span>(<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)))]</span> |
| <span class="kw">impl</span> <span class="ident">Parse</span> <span class="kw">for</span> <span class="ident">Underscore</span> { |
| <span class="kw">fn</span> <span class="ident">parse</span>(<span class="ident">input</span>: <span class="ident">ParseStream</span>) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="self">Self</span><span class="op">></span> { |
| <span class="ident">input</span>.<span class="ident">step</span>(<span class="op">|</span><span class="ident">cursor</span><span class="op">|</span> { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>((<span class="ident">ident</span>, <span class="ident">rest</span>)) <span class="op">=</span> <span class="ident">cursor</span>.<span class="ident">ident</span>() { |
| <span class="kw">if</span> <span class="ident">ident</span> <span class="op">==</span> <span class="string">"_"</span> { |
| <span class="kw">return</span> <span class="prelude-val">Ok</span>((<span class="ident">Underscore</span>(<span class="ident">ident</span>.<span class="ident">span</span>()), <span class="ident">rest</span>)); |
| } |
| } |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>((<span class="ident">punct</span>, <span class="ident">rest</span>)) <span class="op">=</span> <span class="ident">cursor</span>.<span class="ident">punct</span>() { |
| <span class="kw">if</span> <span class="ident">punct</span>.<span class="ident">as_char</span>() <span class="op">==</span> <span class="string">'_'</span> { |
| <span class="kw">return</span> <span class="prelude-val">Ok</span>((<span class="ident">Underscore</span>(<span class="ident">punct</span>.<span class="ident">span</span>()), <span class="ident">rest</span>)); |
| } |
| } |
| <span class="prelude-val">Err</span>(<span class="ident">cursor</span>.<span class="ident">error</span>(<span class="string">"expected `_`"</span>)) |
| }) |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)]</span> |
| <span class="kw">impl</span> <span class="ident">Token</span> <span class="kw">for</span> <span class="ident">Underscore</span> { |
| <span class="kw">fn</span> <span class="ident">peek</span>(<span class="ident">cursor</span>: <span class="ident">Cursor</span>) -> <span class="ident">bool</span> { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>((<span class="ident">ident</span>, <span class="ident">_rest</span>)) <span class="op">=</span> <span class="ident">cursor</span>.<span class="ident">ident</span>() { |
| <span class="kw">return</span> <span class="ident">ident</span> <span class="op">==</span> <span class="string">"_"</span>; |
| } |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>((<span class="ident">punct</span>, <span class="ident">_rest</span>)) <span class="op">=</span> <span class="ident">cursor</span>.<span class="ident">punct</span>() { |
| <span class="kw">return</span> <span class="ident">punct</span>.<span class="ident">as_char</span>() <span class="op">==</span> <span class="string">'_'</span>; |
| } |
| <span class="bool-val">false</span> |
| } |
| |
| <span class="kw">fn</span> <span class="ident">display</span>() -> <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> { |
| <span class="string">"`_`"</span> |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)]</span> |
| <span class="kw">impl</span> <span class="ident">private::Sealed</span> <span class="kw">for</span> <span class="ident">Underscore</span> {} |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)]</span> |
| <span class="kw">impl</span> <span class="ident">Token</span> <span class="kw">for</span> <span class="ident">Paren</span> { |
| <span class="kw">fn</span> <span class="ident">peek</span>(<span class="ident">cursor</span>: <span class="ident">Cursor</span>) -> <span class="ident">bool</span> { |
| <span class="ident">lookahead::is_delimiter</span>(<span class="ident">cursor</span>, <span class="ident">Delimiter::Parenthesis</span>) |
| } |
| |
| <span class="kw">fn</span> <span class="ident">display</span>() -> <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> { |
| <span class="string">"parentheses"</span> |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)]</span> |
| <span class="kw">impl</span> <span class="ident">Token</span> <span class="kw">for</span> <span class="ident">Brace</span> { |
| <span class="kw">fn</span> <span class="ident">peek</span>(<span class="ident">cursor</span>: <span class="ident">Cursor</span>) -> <span class="ident">bool</span> { |
| <span class="ident">lookahead::is_delimiter</span>(<span class="ident">cursor</span>, <span class="ident">Delimiter::Brace</span>) |
| } |
| |
| <span class="kw">fn</span> <span class="ident">display</span>() -> <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> { |
| <span class="string">"curly braces"</span> |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)]</span> |
| <span class="kw">impl</span> <span class="ident">Token</span> <span class="kw">for</span> <span class="ident">Bracket</span> { |
| <span class="kw">fn</span> <span class="ident">peek</span>(<span class="ident">cursor</span>: <span class="ident">Cursor</span>) -> <span class="ident">bool</span> { |
| <span class="ident">lookahead::is_delimiter</span>(<span class="ident">cursor</span>, <span class="ident">Delimiter::Bracket</span>) |
| } |
| |
| <span class="kw">fn</span> <span class="ident">display</span>() -> <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> { |
| <span class="string">"square brackets"</span> |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)]</span> |
| <span class="kw">impl</span> <span class="ident">Token</span> <span class="kw">for</span> <span class="ident">Group</span> { |
| <span class="kw">fn</span> <span class="ident">peek</span>(<span class="ident">cursor</span>: <span class="ident">Cursor</span>) -> <span class="ident">bool</span> { |
| <span class="ident">lookahead::is_delimiter</span>(<span class="ident">cursor</span>, <span class="ident">Delimiter::None</span>) |
| } |
| |
| <span class="kw">fn</span> <span class="ident">display</span>() -> <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> { |
| <span class="string">"invisible group"</span> |
| } |
| } |
| |
| <span class="macro">define_keywords!</span> { |
| <span class="string">"abstract"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Abstract</span> <span class="doccomment">/// `abstract`</span> |
| <span class="string">"as"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">As</span> <span class="doccomment">/// `as`</span> |
| <span class="string">"async"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Async</span> <span class="doccomment">/// `async`</span> |
| <span class="string">"auto"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Auto</span> <span class="doccomment">/// `auto`</span> |
| <span class="string">"await"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Await</span> <span class="doccomment">/// `await`</span> |
| <span class="string">"become"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Become</span> <span class="doccomment">/// `become`</span> |
| <span class="string">"box"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Box</span> <span class="doccomment">/// `box`</span> |
| <span class="string">"break"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Break</span> <span class="doccomment">/// `break`</span> |
| <span class="string">"const"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Const</span> <span class="doccomment">/// `const`</span> |
| <span class="string">"continue"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Continue</span> <span class="doccomment">/// `continue`</span> |
| <span class="string">"crate"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Crate</span> <span class="doccomment">/// `crate`</span> |
| <span class="string">"default"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Default</span> <span class="doccomment">/// `default`</span> |
| <span class="string">"do"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Do</span> <span class="doccomment">/// `do`</span> |
| <span class="string">"dyn"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Dyn</span> <span class="doccomment">/// `dyn`</span> |
| <span class="string">"else"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Else</span> <span class="doccomment">/// `else`</span> |
| <span class="string">"enum"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Enum</span> <span class="doccomment">/// `enum`</span> |
| <span class="string">"extern"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Extern</span> <span class="doccomment">/// `extern`</span> |
| <span class="string">"final"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Final</span> <span class="doccomment">/// `final`</span> |
| <span class="string">"fn"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Fn</span> <span class="doccomment">/// `fn`</span> |
| <span class="string">"for"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">For</span> <span class="doccomment">/// `for`</span> |
| <span class="string">"if"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">If</span> <span class="doccomment">/// `if`</span> |
| <span class="string">"impl"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Impl</span> <span class="doccomment">/// `impl`</span> |
| <span class="string">"in"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">In</span> <span class="doccomment">/// `in`</span> |
| <span class="string">"let"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Let</span> <span class="doccomment">/// `let`</span> |
| <span class="string">"loop"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Loop</span> <span class="doccomment">/// `loop`</span> |
| <span class="string">"macro"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Macro</span> <span class="doccomment">/// `macro`</span> |
| <span class="string">"match"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Match</span> <span class="doccomment">/// `match`</span> |
| <span class="string">"mod"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Mod</span> <span class="doccomment">/// `mod`</span> |
| <span class="string">"move"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Move</span> <span class="doccomment">/// `move`</span> |
| <span class="string">"mut"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Mut</span> <span class="doccomment">/// `mut`</span> |
| <span class="string">"override"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Override</span> <span class="doccomment">/// `override`</span> |
| <span class="string">"priv"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Priv</span> <span class="doccomment">/// `priv`</span> |
| <span class="string">"pub"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Pub</span> <span class="doccomment">/// `pub`</span> |
| <span class="string">"ref"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Ref</span> <span class="doccomment">/// `ref`</span> |
| <span class="string">"return"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Return</span> <span class="doccomment">/// `return`</span> |
| <span class="string">"Self"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">SelfType</span> <span class="doccomment">/// `Self`</span> |
| <span class="string">"self"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">SelfValue</span> <span class="doccomment">/// `self`</span> |
| <span class="string">"static"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Static</span> <span class="doccomment">/// `static`</span> |
| <span class="string">"struct"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Struct</span> <span class="doccomment">/// `struct`</span> |
| <span class="string">"super"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Super</span> <span class="doccomment">/// `super`</span> |
| <span class="string">"trait"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Trait</span> <span class="doccomment">/// `trait`</span> |
| <span class="string">"try"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Try</span> <span class="doccomment">/// `try`</span> |
| <span class="string">"type"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Type</span> <span class="doccomment">/// `type`</span> |
| <span class="string">"typeof"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Typeof</span> <span class="doccomment">/// `typeof`</span> |
| <span class="string">"union"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Union</span> <span class="doccomment">/// `union`</span> |
| <span class="string">"unsafe"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Unsafe</span> <span class="doccomment">/// `unsafe`</span> |
| <span class="string">"unsized"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Unsized</span> <span class="doccomment">/// `unsized`</span> |
| <span class="string">"use"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Use</span> <span class="doccomment">/// `use`</span> |
| <span class="string">"virtual"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Virtual</span> <span class="doccomment">/// `virtual`</span> |
| <span class="string">"where"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Where</span> <span class="doccomment">/// `where`</span> |
| <span class="string">"while"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">While</span> <span class="doccomment">/// `while`</span> |
| <span class="string">"yield"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Yield</span> <span class="doccomment">/// `yield`</span> |
| } |
| |
| <span class="macro">define_punctuation!</span> { |
| <span class="string">"+"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Add</span><span class="op">/</span><span class="number">1</span> <span class="doccomment">/// `+`</span> |
| <span class="string">"+="</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">AddEq</span><span class="op">/</span><span class="number">2</span> <span class="doccomment">/// `+=`</span> |
| <span class="string">"&"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">And</span><span class="op">/</span><span class="number">1</span> <span class="doccomment">/// `&`</span> |
| <span class="string">"&&"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">AndAnd</span><span class="op">/</span><span class="number">2</span> <span class="doccomment">/// `&&`</span> |
| <span class="string">"&="</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">AndEq</span><span class="op">/</span><span class="number">2</span> <span class="doccomment">/// `&=`</span> |
| <span class="string">"@"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">At</span><span class="op">/</span><span class="number">1</span> <span class="doccomment">/// `@`</span> |
| <span class="string">"!"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Bang</span><span class="op">/</span><span class="number">1</span> <span class="doccomment">/// `!`</span> |
| <span class="string">"^"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Caret</span><span class="op">/</span><span class="number">1</span> <span class="doccomment">/// `^`</span> |
| <span class="string">"^="</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">CaretEq</span><span class="op">/</span><span class="number">2</span> <span class="doccomment">/// `^=`</span> |
| <span class="string">":"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Colon</span><span class="op">/</span><span class="number">1</span> <span class="doccomment">/// `:`</span> |
| <span class="string">"::"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Colon2</span><span class="op">/</span><span class="number">2</span> <span class="doccomment">/// `::`</span> |
| <span class="string">","</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Comma</span><span class="op">/</span><span class="number">1</span> <span class="doccomment">/// `,`</span> |
| <span class="string">"/"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Div</span><span class="op">/</span><span class="number">1</span> <span class="doccomment">/// `/`</span> |
| <span class="string">"/="</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">DivEq</span><span class="op">/</span><span class="number">2</span> <span class="doccomment">/// `/=`</span> |
| <span class="string">"$"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Dollar</span><span class="op">/</span><span class="number">1</span> <span class="doccomment">/// `$`</span> |
| <span class="string">"."</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Dot</span><span class="op">/</span><span class="number">1</span> <span class="doccomment">/// `.`</span> |
| <span class="string">".."</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Dot2</span><span class="op">/</span><span class="number">2</span> <span class="doccomment">/// `..`</span> |
| <span class="string">"..."</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Dot3</span><span class="op">/</span><span class="number">3</span> <span class="doccomment">/// `...`</span> |
| <span class="string">"..="</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">DotDotEq</span><span class="op">/</span><span class="number">3</span> <span class="doccomment">/// `..=`</span> |
| <span class="string">"="</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Eq</span><span class="op">/</span><span class="number">1</span> <span class="doccomment">/// `=`</span> |
| <span class="string">"=="</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">EqEq</span><span class="op">/</span><span class="number">2</span> <span class="doccomment">/// `==`</span> |
| <span class="string">">="</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Ge</span><span class="op">/</span><span class="number">2</span> <span class="doccomment">/// `>=`</span> |
| <span class="string">">"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Gt</span><span class="op">/</span><span class="number">1</span> <span class="doccomment">/// `>`</span> |
| <span class="string">"<="</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Le</span><span class="op">/</span><span class="number">2</span> <span class="doccomment">/// `<=`</span> |
| <span class="string">"<"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Lt</span><span class="op">/</span><span class="number">1</span> <span class="doccomment">/// `<`</span> |
| <span class="string">"*="</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">MulEq</span><span class="op">/</span><span class="number">2</span> <span class="doccomment">/// `*=`</span> |
| <span class="string">"!="</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Ne</span><span class="op">/</span><span class="number">2</span> <span class="doccomment">/// `!=`</span> |
| <span class="string">"|"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Or</span><span class="op">/</span><span class="number">1</span> <span class="doccomment">/// `|`</span> |
| <span class="string">"|="</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">OrEq</span><span class="op">/</span><span class="number">2</span> <span class="doccomment">/// `|=`</span> |
| <span class="string">"||"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">OrOr</span><span class="op">/</span><span class="number">2</span> <span class="doccomment">/// `||`</span> |
| <span class="string">"#"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Pound</span><span class="op">/</span><span class="number">1</span> <span class="doccomment">/// `#`</span> |
| <span class="string">"?"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Question</span><span class="op">/</span><span class="number">1</span> <span class="doccomment">/// `?`</span> |
| <span class="string">"->"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">RArrow</span><span class="op">/</span><span class="number">2</span> <span class="doccomment">/// `->`</span> |
| <span class="string">"<-"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">LArrow</span><span class="op">/</span><span class="number">2</span> <span class="doccomment">/// `<-`</span> |
| <span class="string">"%"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Rem</span><span class="op">/</span><span class="number">1</span> <span class="doccomment">/// `%`</span> |
| <span class="string">"%="</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">RemEq</span><span class="op">/</span><span class="number">2</span> <span class="doccomment">/// `%=`</span> |
| <span class="string">"=>"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">FatArrow</span><span class="op">/</span><span class="number">2</span> <span class="doccomment">/// `=>`</span> |
| <span class="string">";"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Semi</span><span class="op">/</span><span class="number">1</span> <span class="doccomment">/// `;`</span> |
| <span class="string">"<<"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Shl</span><span class="op">/</span><span class="number">2</span> <span class="doccomment">/// `<<`</span> |
| <span class="string">"<<="</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">ShlEq</span><span class="op">/</span><span class="number">3</span> <span class="doccomment">/// `<<=`</span> |
| <span class="string">">>"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Shr</span><span class="op">/</span><span class="number">2</span> <span class="doccomment">/// `>>`</span> |
| <span class="string">">>="</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">ShrEq</span><span class="op">/</span><span class="number">3</span> <span class="doccomment">/// `>>=`</span> |
| <span class="string">"*"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Star</span><span class="op">/</span><span class="number">1</span> <span class="doccomment">/// `*`</span> |
| <span class="string">"-"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Sub</span><span class="op">/</span><span class="number">1</span> <span class="doccomment">/// `-`</span> |
| <span class="string">"-="</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">SubEq</span><span class="op">/</span><span class="number">2</span> <span class="doccomment">/// `-=`</span> |
| <span class="string">"~"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Tilde</span><span class="op">/</span><span class="number">1</span> <span class="doccomment">/// `~`</span> |
| } |
| |
| <span class="macro">define_delimiters!</span> { |
| <span class="string">"{"</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Brace</span> <span class="doccomment">/// `{...}`</span> |
| <span class="string">"["</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Bracket</span> <span class="doccomment">/// `[...]`</span> |
| <span class="string">"("</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Paren</span> <span class="doccomment">/// `(...)`</span> |
| <span class="string">" "</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Group</span> <span class="doccomment">/// None-delimited group</span> |
| } |
| |
| <span class="macro">macro_rules!</span> <span class="ident">export_token_macro</span> { |
| ($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">await_rule</span>:<span class="ident">tt</span>)<span class="kw-2">*</span>) => { |
| <span class="doccomment">/// A type-macro that expands to the name of the Rust type representation of a</span> |
| <span class="doccomment">/// given token.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// See the [token module] documentation for details and examples.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// [token module]: crate::token</span> |
| <span class="comment">// Unfortunate duplication due to a rustdoc bug.</span> |
| <span class="comment">// https://github.com/rust-lang/rust/issues/45939</span> |
| <span class="attribute">#[<span class="ident">macro_export</span>]</span> |
| <span class="macro">macro_rules!</span> <span class="ident">Token</span> { |
| [<span class="kw">abstract</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Abstract</span> }; |
| [<span class="kw">as</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::As</span> }; |
| [<span class="kw">async</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Async</span> }; |
| [<span class="ident">auto</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Auto</span> }; |
| $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">await_rule</span> => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Await</span> };)<span class="op">*</span> |
| [<span class="kw">become</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Become</span> }; |
| [<span class="kw">box</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Box</span> }; |
| [<span class="kw">break</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Break</span> }; |
| [<span class="kw">const</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Const</span> }; |
| [<span class="kw">continue</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Continue</span> }; |
| [<span class="kw">crate</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Crate</span> }; |
| [<span class="ident">default</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Default</span> }; |
| [<span class="kw">do</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Do</span> }; |
| [<span class="kw">dyn</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Dyn</span> }; |
| [<span class="kw">else</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Else</span> }; |
| [<span class="kw">enum</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Enum</span> }; |
| [<span class="kw">extern</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Extern</span> }; |
| [<span class="kw">final</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Final</span> }; |
| [<span class="kw">fn</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Fn</span> }; |
| [<span class="kw">for</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::For</span> }; |
| [<span class="kw">if</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::If</span> }; |
| [<span class="kw">impl</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Impl</span> }; |
| [<span class="kw">in</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::In</span> }; |
| [<span class="kw">let</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Let</span> }; |
| [<span class="kw">loop</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Loop</span> }; |
| [<span class="kw">macro</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Macro</span> }; |
| [<span class="kw">match</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Match</span> }; |
| [<span class="kw">mod</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Mod</span> }; |
| [<span class="kw">move</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Move</span> }; |
| [<span class="kw-2">mut</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Mut</span> }; |
| [<span class="kw">override</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Override</span> }; |
| [<span class="kw">priv</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Priv</span> }; |
| [<span class="kw">pub</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Pub</span> }; |
| [<span class="kw-2">ref</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Ref</span> }; |
| [<span class="kw">return</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Return</span> }; |
| [<span class="self">Self</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::SelfType</span> }; |
| [<span class="self">self</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::SelfValue</span> }; |
| [<span class="kw">static</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Static</span> }; |
| [<span class="kw">struct</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Struct</span> }; |
| [<span class="kw">super</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Super</span> }; |
| [<span class="kw">trait</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Trait</span> }; |
| [<span class="kw">try</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Try</span> }; |
| [<span class="kw">type</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Type</span> }; |
| [<span class="kw">typeof</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Typeof</span> }; |
| [<span class="ident">union</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Union</span> }; |
| [<span class="kw">unsafe</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Unsafe</span> }; |
| [<span class="kw">unsized</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Unsized</span> }; |
| [<span class="kw">use</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Use</span> }; |
| [<span class="kw">virtual</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Virtual</span> }; |
| [<span class="kw">where</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Where</span> }; |
| [<span class="kw">while</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::While</span> }; |
| [<span class="kw">yield</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Yield</span> }; |
| [<span class="op">+</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Add</span> }; |
| [<span class="op">+</span><span class="op">=</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::AddEq</span> }; |
| [<span class="kw-2">&</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::And</span> }; |
| [<span class="op">&&</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::AndAnd</span> }; |
| [<span class="op">&=</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::AndEq</span> }; |
| [@] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::At</span> }; |
| [<span class="op">!</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Bang</span> }; |
| [<span class="op">^</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Caret</span> }; |
| [<span class="op">^</span><span class="op">=</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::CaretEq</span> }; |
| [:] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Colon</span> }; |
| [::] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Colon2</span> }; |
| [,] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Comma</span> }; |
| [<span class="op">/</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Div</span> }; |
| [<span class="op">/</span><span class="op">=</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::DivEq</span> }; |
| [$] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Dollar</span> }; |
| [.] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Dot</span> }; |
| [..] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Dot2</span> }; |
| [...] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Dot3</span> }; |
| [..<span class="op">=</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::DotDotEq</span> }; |
| [<span class="op">=</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Eq</span> }; |
| [<span class="op">==</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::EqEq</span> }; |
| [<span class="op">></span><span class="op">=</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Ge</span> }; |
| [<span class="op">></span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Gt</span> }; |
| [<span class="op"><</span><span class="op">=</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Le</span> }; |
| [<span class="op"><</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Lt</span> }; |
| [<span class="kw-2">*</span><span class="op">=</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::MulEq</span> }; |
| [<span class="op">!</span><span class="op">=</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Ne</span> }; |
| [<span class="op">|</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Or</span> }; |
| [<span class="op">|</span><span class="op">=</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::OrEq</span> }; |
| [<span class="op">|</span><span class="op">|</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::OrOr</span> }; |
| [#] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Pound</span> }; |
| [<span class="question-mark">?</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Question</span> }; |
| [->] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::RArrow</span> }; |
| [<span class="op"><</span><span class="op">-</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::LArrow</span> }; |
| [<span class="op">%</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Rem</span> }; |
| [<span class="op">%</span><span class="op">=</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::RemEq</span> }; |
| [=>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::FatArrow</span> }; |
| [;] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Semi</span> }; |
| [<span class="op"><</span><span class="op"><</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Shl</span> }; |
| [<span class="op"><</span><span class="op"><</span><span class="op">=</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::ShlEq</span> }; |
| [<span class="op">></span><span class="op">></span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Shr</span> }; |
| [<span class="op">></span><span class="op">></span><span class="op">=</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::ShrEq</span> }; |
| [<span class="kw-2">*</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Star</span> }; |
| [<span class="op">-</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Sub</span> }; |
| [<span class="op">-</span><span class="op">=</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::SubEq</span> }; |
| [~] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Tilde</span> }; |
| [<span class="kw">_</span>] => { <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::token::Underscore</span> }; |
| } |
| }; |
| } |
| |
| <span class="comment">// Old rustc does not permit `await` appearing anywhere in the source file.</span> |
| <span class="comment">// https://github.com/rust-lang/rust/issues/57919</span> |
| <span class="comment">// We put the Token![await] rule in a place that is not lexed by old rustc.</span> |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">syn_omit_await_from_token_macro</span>))]</span> |
| <span class="macro">include!</span>(<span class="string">"await.rs"</span>); <span class="comment">// export_token_macro! {[await]}</span> |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">syn_omit_await_from_token_macro</span>)]</span> |
| <span class="macro">export_token_macro!</span> {} |
| |
| <span class="comment">// Not public API.</span> |
| <span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span> |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"parsing"</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">parsing</span> { |
| <span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::buffer::Cursor</span>; |
| <span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::error</span>::{<span class="ident">Error</span>, <span class="prelude-ty">Result</span>}; |
| <span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::parse::ParseStream</span>; |
| <span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::span::FromSpans</span>; |
| <span class="kw">use</span> <span class="ident">proc_macro2</span>::{<span class="ident">Spacing</span>, <span class="ident">Span</span>}; |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">keyword</span>(<span class="ident">input</span>: <span class="ident">ParseStream</span>, <span class="ident">token</span>: <span class="kw-2">&</span><span class="ident">str</span>) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">Span</span><span class="op">></span> { |
| <span class="ident">input</span>.<span class="ident">step</span>(<span class="op">|</span><span class="ident">cursor</span><span class="op">|</span> { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>((<span class="ident">ident</span>, <span class="ident">rest</span>)) <span class="op">=</span> <span class="ident">cursor</span>.<span class="ident">ident</span>() { |
| <span class="kw">if</span> <span class="ident">ident</span> <span class="op">==</span> <span class="ident">token</span> { |
| <span class="kw">return</span> <span class="prelude-val">Ok</span>((<span class="ident">ident</span>.<span class="ident">span</span>(), <span class="ident">rest</span>)); |
| } |
| } |
| <span class="prelude-val">Err</span>(<span class="ident">cursor</span>.<span class="ident">error</span>(<span class="macro">format!</span>(<span class="string">"expected `{}`"</span>, <span class="ident">token</span>))) |
| }) |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">peek_keyword</span>(<span class="ident">cursor</span>: <span class="ident">Cursor</span>, <span class="ident">token</span>: <span class="kw-2">&</span><span class="ident">str</span>) -> <span class="ident">bool</span> { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>((<span class="ident">ident</span>, <span class="ident">_rest</span>)) <span class="op">=</span> <span class="ident">cursor</span>.<span class="ident">ident</span>() { |
| <span class="ident">ident</span> <span class="op">==</span> <span class="ident">token</span> |
| } <span class="kw">else</span> { |
| <span class="bool-val">false</span> |
| } |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">punct</span><span class="op"><</span><span class="ident">S</span>: <span class="ident">FromSpans</span><span class="op">></span>(<span class="ident">input</span>: <span class="ident">ParseStream</span>, <span class="ident">token</span>: <span class="kw-2">&</span><span class="ident">str</span>) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">S</span><span class="op">></span> { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">spans</span> <span class="op">=</span> [<span class="ident">input</span>.<span class="ident">span</span>(); <span class="number">3</span>]; |
| <span class="ident">punct_helper</span>(<span class="ident">input</span>, <span class="ident">token</span>, <span class="kw-2">&mut</span> <span class="ident">spans</span>)<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(<span class="ident">S::from_spans</span>(<span class="kw-2">&</span><span class="ident">spans</span>)) |
| } |
| |
| <span class="kw">fn</span> <span class="ident">punct_helper</span>(<span class="ident">input</span>: <span class="ident">ParseStream</span>, <span class="ident">token</span>: <span class="kw-2">&</span><span class="ident">str</span>, <span class="ident">spans</span>: <span class="kw-2">&mut</span> [<span class="ident">Span</span>; <span class="number">3</span>]) -> <span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { |
| <span class="ident">input</span>.<span class="ident">step</span>(<span class="op">|</span><span class="ident">cursor</span><span class="op">|</span> { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">cursor</span> <span class="op">=</span> <span class="kw-2">*</span><span class="ident">cursor</span>; |
| <span class="macro">assert!</span>(<span class="ident">token</span>.<span class="ident">len</span>() <span class="op"><</span><span class="op">=</span> <span class="ident">spans</span>.<span class="ident">len</span>()); |
| |
| <span class="kw">for</span> (<span class="ident">i</span>, <span class="ident">ch</span>) <span class="kw">in</span> <span class="ident">token</span>.<span class="ident">chars</span>().<span class="ident">enumerate</span>() { |
| <span class="kw">match</span> <span class="ident">cursor</span>.<span class="ident">punct</span>() { |
| <span class="prelude-val">Some</span>((<span class="ident">punct</span>, <span class="ident">rest</span>)) => { |
| <span class="ident">spans</span>[<span class="ident">i</span>] <span class="op">=</span> <span class="ident">punct</span>.<span class="ident">span</span>(); |
| <span class="kw">if</span> <span class="ident">punct</span>.<span class="ident">as_char</span>() <span class="op">!</span><span class="op">=</span> <span class="ident">ch</span> { |
| <span class="kw">break</span>; |
| } <span class="kw">else</span> <span class="kw">if</span> <span class="ident">i</span> <span class="op">==</span> <span class="ident">token</span>.<span class="ident">len</span>() <span class="op">-</span> <span class="number">1</span> { |
| <span class="kw">return</span> <span class="prelude-val">Ok</span>(((), <span class="ident">rest</span>)); |
| } <span class="kw">else</span> <span class="kw">if</span> <span class="ident">punct</span>.<span class="ident">spacing</span>() <span class="op">!</span><span class="op">=</span> <span class="ident">Spacing::Joint</span> { |
| <span class="kw">break</span>; |
| } |
| <span class="ident">cursor</span> <span class="op">=</span> <span class="ident">rest</span>; |
| } |
| <span class="prelude-val">None</span> => <span class="kw">break</span>, |
| } |
| } |
| |
| <span class="prelude-val">Err</span>(<span class="ident">Error::new</span>(<span class="ident">spans</span>[<span class="number">0</span>], <span class="macro">format!</span>(<span class="string">"expected `{}`"</span>, <span class="ident">token</span>))) |
| }) |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">peek_punct</span>(<span class="kw-2">mut</span> <span class="ident">cursor</span>: <span class="ident">Cursor</span>, <span class="ident">token</span>: <span class="kw-2">&</span><span class="ident">str</span>) -> <span class="ident">bool</span> { |
| <span class="kw">for</span> (<span class="ident">i</span>, <span class="ident">ch</span>) <span class="kw">in</span> <span class="ident">token</span>.<span class="ident">chars</span>().<span class="ident">enumerate</span>() { |
| <span class="kw">match</span> <span class="ident">cursor</span>.<span class="ident">punct</span>() { |
| <span class="prelude-val">Some</span>((<span class="ident">punct</span>, <span class="ident">rest</span>)) => { |
| <span class="kw">if</span> <span class="ident">punct</span>.<span class="ident">as_char</span>() <span class="op">!</span><span class="op">=</span> <span class="ident">ch</span> { |
| <span class="kw">break</span>; |
| } <span class="kw">else</span> <span class="kw">if</span> <span class="ident">i</span> <span class="op">==</span> <span class="ident">token</span>.<span class="ident">len</span>() <span class="op">-</span> <span class="number">1</span> { |
| <span class="kw">return</span> <span class="bool-val">true</span>; |
| } <span class="kw">else</span> <span class="kw">if</span> <span class="ident">punct</span>.<span class="ident">spacing</span>() <span class="op">!</span><span class="op">=</span> <span class="ident">Spacing::Joint</span> { |
| <span class="kw">break</span>; |
| } |
| <span class="ident">cursor</span> <span class="op">=</span> <span class="ident">rest</span>; |
| } |
| <span class="prelude-val">None</span> => <span class="kw">break</span>, |
| } |
| } |
| <span class="bool-val">false</span> |
| } |
| } |
| |
| <span class="comment">// Not public API.</span> |
| <span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span> |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"printing"</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">printing</span> { |
| <span class="kw">use</span> <span class="ident">proc_macro2</span>::{<span class="ident">Delimiter</span>, <span class="ident">Group</span>, <span class="ident">Ident</span>, <span class="ident">Punct</span>, <span class="ident">Spacing</span>, <span class="ident">Span</span>, <span class="ident">TokenStream</span>}; |
| <span class="kw">use</span> <span class="ident">quote::TokenStreamExt</span>; |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">punct</span>(<span class="ident">s</span>: <span class="kw-2">&</span><span class="ident">str</span>, <span class="ident">spans</span>: <span class="kw-2">&</span>[<span class="ident">Span</span>], <span class="ident">tokens</span>: <span class="kw-2">&mut</span> <span class="ident">TokenStream</span>) { |
| <span class="macro">assert_eq!</span>(<span class="ident">s</span>.<span class="ident">len</span>(), <span class="ident">spans</span>.<span class="ident">len</span>()); |
| |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">chars</span> <span class="op">=</span> <span class="ident">s</span>.<span class="ident">chars</span>(); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">spans</span> <span class="op">=</span> <span class="ident">spans</span>.<span class="ident">iter</span>(); |
| <span class="kw">let</span> <span class="ident">ch</span> <span class="op">=</span> <span class="ident">chars</span>.<span class="ident">next_back</span>().<span class="ident">unwrap</span>(); |
| <span class="kw">let</span> <span class="ident">span</span> <span class="op">=</span> <span class="ident">spans</span>.<span class="ident">next_back</span>().<span class="ident">unwrap</span>(); |
| <span class="kw">for</span> (<span class="ident">ch</span>, <span class="ident">span</span>) <span class="kw">in</span> <span class="ident">chars</span>.<span class="ident">zip</span>(<span class="ident">spans</span>) { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">op</span> <span class="op">=</span> <span class="ident">Punct::new</span>(<span class="ident">ch</span>, <span class="ident">Spacing::Joint</span>); |
| <span class="ident">op</span>.<span class="ident">set_span</span>(<span class="kw-2">*</span><span class="ident">span</span>); |
| <span class="ident">tokens</span>.<span class="ident">append</span>(<span class="ident">op</span>); |
| } |
| |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">op</span> <span class="op">=</span> <span class="ident">Punct::new</span>(<span class="ident">ch</span>, <span class="ident">Spacing::Alone</span>); |
| <span class="ident">op</span>.<span class="ident">set_span</span>(<span class="kw-2">*</span><span class="ident">span</span>); |
| <span class="ident">tokens</span>.<span class="ident">append</span>(<span class="ident">op</span>); |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">keyword</span>(<span class="ident">s</span>: <span class="kw-2">&</span><span class="ident">str</span>, <span class="ident">span</span>: <span class="ident">Span</span>, <span class="ident">tokens</span>: <span class="kw-2">&mut</span> <span class="ident">TokenStream</span>) { |
| <span class="ident">tokens</span>.<span class="ident">append</span>(<span class="ident">Ident::new</span>(<span class="ident">s</span>, <span class="ident">span</span>)); |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">delim</span><span class="op"><</span><span class="ident">F</span><span class="op">></span>(<span class="ident">s</span>: <span class="kw-2">&</span><span class="ident">str</span>, <span class="ident">span</span>: <span class="ident">Span</span>, <span class="ident">tokens</span>: <span class="kw-2">&mut</span> <span class="ident">TokenStream</span>, <span class="ident">f</span>: <span class="ident">F</span>) |
| <span class="kw">where</span> |
| <span class="ident">F</span>: <span class="ident">FnOnce</span>(<span class="kw-2">&mut</span> <span class="ident">TokenStream</span>), |
| { |
| <span class="kw">let</span> <span class="ident">delim</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">s</span> { |
| <span class="string">"("</span> => <span class="ident">Delimiter::Parenthesis</span>, |
| <span class="string">"["</span> => <span class="ident">Delimiter::Bracket</span>, |
| <span class="string">"{"</span> => <span class="ident">Delimiter::Brace</span>, |
| <span class="string">" "</span> => <span class="ident">Delimiter::None</span>, |
| <span class="kw">_</span> => <span class="macro">panic!</span>(<span class="string">"unknown delimiter: {}"</span>, <span class="ident">s</span>), |
| }; |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">inner</span> <span class="op">=</span> <span class="ident">TokenStream::new</span>(); |
| <span class="ident">f</span>(<span class="kw-2">&mut</span> <span class="ident">inner</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">g</span> <span class="op">=</span> <span class="ident">Group::new</span>(<span class="ident">delim</span>, <span class="ident">inner</span>); |
| <span class="ident">g</span>.<span class="ident">set_span</span>(<span class="ident">span</span>); |
| <span class="ident">tokens</span>.<span class="ident">append</span>(<span class="ident">g</span>); |
| } |
| } |
| </code></pre></div> |
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