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| <span id="972">972</span> |
| <span id="973">973</span> |
| <span id="974">974</span> |
| </pre><pre class="rust"><code><span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::detection::inside_proc_macro</span>; |
| <span class="kw">use</span> <span class="kw">crate</span>::{<span class="ident">fallback</span>, <span class="ident">Delimiter</span>, <span class="ident">Punct</span>, <span class="ident">Spacing</span>, <span class="ident">TokenTree</span>}; |
| <span class="kw">use</span> <span class="ident">std::fmt</span>::{<span class="self">self</span>, <span class="ident">Debug</span>, <span class="ident">Display</span>}; |
| <span class="kw">use</span> <span class="ident">std::iter::FromIterator</span>; |
| <span class="kw">use</span> <span class="ident">std::ops::RangeBounds</span>; |
| <span class="kw">use</span> <span class="ident">std::panic</span>; |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">super_unstable</span>)]</span> |
| <span class="kw">use</span> <span class="ident">std::path::PathBuf</span>; |
| <span class="kw">use</span> <span class="ident">std::str::FromStr</span>; |
| |
| <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>)]</span> |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">enum</span> <span class="ident">TokenStream</span> { |
| <span class="ident">Compiler</span>(<span class="ident">DeferredTokenStream</span>), |
| <span class="ident">Fallback</span>(<span class="ident">fallback::TokenStream</span>), |
| } |
| |
| <span class="comment">// Work around https://github.com/rust-lang/rust/issues/65080.</span> |
| <span class="comment">// In `impl Extend<TokenTree> for TokenStream` which is used heavily by quote,</span> |
| <span class="comment">// we hold on to the appended tokens and do proc_macro::TokenStream::extend as</span> |
| <span class="comment">// late as possible to batch together consecutive uses of the Extend impl.</span> |
| <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>)]</span> |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct</span> <span class="ident">DeferredTokenStream</span> { |
| <span class="ident">stream</span>: <span class="ident">proc_macro::TokenStream</span>, |
| <span class="ident">extra</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">proc_macro::TokenTree</span><span class="op">></span>, |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">enum</span> <span class="ident">LexError</span> { |
| <span class="ident">Compiler</span>(<span class="ident">proc_macro::LexError</span>), |
| <span class="ident">Fallback</span>(<span class="ident">fallback::LexError</span>), |
| } |
| |
| <span class="kw">impl</span> <span class="ident">LexError</span> { |
| <span class="kw">fn</span> <span class="ident">call_site</span>() -> <span class="self">Self</span> { |
| <span class="ident">LexError::Fallback</span>(<span class="ident">fallback::LexError</span> { |
| <span class="ident">span</span>: <span class="ident">fallback::Span::call_site</span>(), |
| }) |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">mismatch</span>() -> <span class="op">!</span> { |
| <span class="macro">panic!</span>(<span class="string">"stable/nightly mismatch"</span>) |
| } |
| |
| <span class="kw">impl</span> <span class="ident">DeferredTokenStream</span> { |
| <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">stream</span>: <span class="ident">proc_macro::TokenStream</span>) -> <span class="self">Self</span> { |
| <span class="ident">DeferredTokenStream</span> { |
| <span class="ident">stream</span>, |
| <span class="ident">extra</span>: <span class="ident">Vec::new</span>(), |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">is_empty</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">bool</span> { |
| <span class="self">self</span>.<span class="ident">stream</span>.<span class="ident">is_empty</span>() <span class="op">&&</span> <span class="self">self</span>.<span class="ident">extra</span>.<span class="ident">is_empty</span>() |
| } |
| |
| <span class="kw">fn</span> <span class="ident">evaluate_now</span>(<span class="kw-2">&mut</span> <span class="self">self</span>) { |
| <span class="comment">// If-check provides a fast short circuit for the common case of `extra`</span> |
| <span class="comment">// being empty, which saves a round trip over the proc macro bridge.</span> |
| <span class="comment">// Improves macro expansion time in winrt by 6% in debug mode.</span> |
| <span class="kw">if</span> <span class="op">!</span><span class="self">self</span>.<span class="ident">extra</span>.<span class="ident">is_empty</span>() { |
| <span class="self">self</span>.<span class="ident">stream</span>.<span class="ident">extend</span>(<span class="self">self</span>.<span class="ident">extra</span>.<span class="ident">drain</span>(..)); |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">into_token_stream</span>(<span class="kw-2">mut</span> <span class="self">self</span>) -> <span class="ident">proc_macro::TokenStream</span> { |
| <span class="self">self</span>.<span class="ident">evaluate_now</span>(); |
| <span class="self">self</span>.<span class="ident">stream</span> |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">TokenStream</span> { |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>() -> <span class="self">Self</span> { |
| <span class="kw">if</span> <span class="ident">inside_proc_macro</span>() { |
| <span class="ident">TokenStream::Compiler</span>(<span class="ident">DeferredTokenStream::new</span>(<span class="ident">proc_macro::TokenStream::new</span>())) |
| } <span class="kw">else</span> { |
| <span class="ident">TokenStream::Fallback</span>(<span class="ident">fallback::TokenStream::new</span>()) |
| } |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_empty</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">bool</span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="ident">TokenStream::Compiler</span>(<span class="ident">tts</span>) => <span class="ident">tts</span>.<span class="ident">is_empty</span>(), |
| <span class="ident">TokenStream::Fallback</span>(<span class="ident">tts</span>) => <span class="ident">tts</span>.<span class="ident">is_empty</span>(), |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">unwrap_nightly</span>(<span class="self">self</span>) -> <span class="ident">proc_macro::TokenStream</span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="ident">TokenStream::Compiler</span>(<span class="ident">s</span>) => <span class="ident">s</span>.<span class="ident">into_token_stream</span>(), |
| <span class="ident">TokenStream::Fallback</span>(<span class="kw">_</span>) => <span class="ident">mismatch</span>(), |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">unwrap_stable</span>(<span class="self">self</span>) -> <span class="ident">fallback::TokenStream</span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="ident">TokenStream::Compiler</span>(<span class="kw">_</span>) => <span class="ident">mismatch</span>(), |
| <span class="ident">TokenStream::Fallback</span>(<span class="ident">s</span>) => <span class="ident">s</span>, |
| } |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">FromStr</span> <span class="kw">for</span> <span class="ident">TokenStream</span> { |
| <span class="kw">type</span> <span class="prelude-val">Err</span> <span class="op">=</span> <span class="ident">LexError</span>; |
| |
| <span class="kw">fn</span> <span class="ident">from_str</span>(<span class="ident">src</span>: <span class="kw-2">&</span><span class="ident">str</span>) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">TokenStream</span>, <span class="ident">LexError</span><span class="op">></span> { |
| <span class="kw">if</span> <span class="ident">inside_proc_macro</span>() { |
| <span class="prelude-val">Ok</span>(<span class="ident">TokenStream::Compiler</span>(<span class="ident">DeferredTokenStream::new</span>( |
| <span class="ident">proc_macro_parse</span>(<span class="ident">src</span>)<span class="question-mark">?</span>, |
| ))) |
| } <span class="kw">else</span> { |
| <span class="prelude-val">Ok</span>(<span class="ident">TokenStream::Fallback</span>(<span class="ident">src</span>.<span class="ident">parse</span>()<span class="question-mark">?</span>)) |
| } |
| } |
| } |
| |
| <span class="comment">// Work around https://github.com/rust-lang/rust/issues/58736.</span> |
| <span class="kw">fn</span> <span class="ident">proc_macro_parse</span>(<span class="ident">src</span>: <span class="kw-2">&</span><span class="ident">str</span>) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">proc_macro::TokenStream</span>, <span class="ident">LexError</span><span class="op">></span> { |
| <span class="kw">let</span> <span class="ident">result</span> <span class="op">=</span> <span class="ident">panic::catch_unwind</span>(<span class="op">|</span><span class="op">|</span> <span class="ident">src</span>.<span class="ident">parse</span>().<span class="ident">map_err</span>(<span class="ident">LexError::Compiler</span>)); |
| <span class="ident">result</span>.<span class="ident">unwrap_or_else</span>(<span class="op">|</span><span class="kw">_</span><span class="op">|</span> <span class="prelude-val">Err</span>(<span class="ident">LexError::call_site</span>())) |
| } |
| |
| <span class="kw">impl</span> <span class="ident">Display</span> <span class="kw">for</span> <span class="ident">TokenStream</span> { |
| <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&mut</span> <span class="ident">fmt::Formatter</span>) -> <span class="ident">fmt::Result</span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="ident">TokenStream::Compiler</span>(<span class="ident">tts</span>) => <span class="ident">Display::fmt</span>(<span class="kw-2">&</span><span class="ident">tts</span>.<span class="ident">clone</span>().<span class="ident">into_token_stream</span>(), <span class="ident">f</span>), |
| <span class="ident">TokenStream::Fallback</span>(<span class="ident">tts</span>) => <span class="ident">Display::fmt</span>(<span class="ident">tts</span>, <span class="ident">f</span>), |
| } |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">From</span><span class="op"><</span><span class="ident">proc_macro::TokenStream</span><span class="op">></span> <span class="kw">for</span> <span class="ident">TokenStream</span> { |
| <span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">inner</span>: <span class="ident">proc_macro::TokenStream</span>) -> <span class="ident">TokenStream</span> { |
| <span class="ident">TokenStream::Compiler</span>(<span class="ident">DeferredTokenStream::new</span>(<span class="ident">inner</span>)) |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">From</span><span class="op"><</span><span class="ident">TokenStream</span><span class="op">></span> <span class="kw">for</span> <span class="ident">proc_macro::TokenStream</span> { |
| <span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">inner</span>: <span class="ident">TokenStream</span>) -> <span class="ident">proc_macro::TokenStream</span> { |
| <span class="kw">match</span> <span class="ident">inner</span> { |
| <span class="ident">TokenStream::Compiler</span>(<span class="ident">inner</span>) => <span class="ident">inner</span>.<span class="ident">into_token_stream</span>(), |
| <span class="ident">TokenStream::Fallback</span>(<span class="ident">inner</span>) => <span class="ident">inner</span>.<span class="ident">to_string</span>().<span class="ident">parse</span>().<span class="ident">unwrap</span>(), |
| } |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">From</span><span class="op"><</span><span class="ident">fallback::TokenStream</span><span class="op">></span> <span class="kw">for</span> <span class="ident">TokenStream</span> { |
| <span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">inner</span>: <span class="ident">fallback::TokenStream</span>) -> <span class="ident">TokenStream</span> { |
| <span class="ident">TokenStream::Fallback</span>(<span class="ident">inner</span>) |
| } |
| } |
| |
| <span class="comment">// Assumes inside_proc_macro().</span> |
| <span class="kw">fn</span> <span class="ident">into_compiler_token</span>(<span class="ident">token</span>: <span class="ident">TokenTree</span>) -> <span class="ident">proc_macro::TokenTree</span> { |
| <span class="kw">match</span> <span class="ident">token</span> { |
| <span class="ident">TokenTree::Group</span>(<span class="ident">tt</span>) => <span class="ident">tt</span>.<span class="ident">inner</span>.<span class="ident">unwrap_nightly</span>().<span class="ident">into</span>(), |
| <span class="ident">TokenTree::Punct</span>(<span class="ident">tt</span>) => { |
| <span class="kw">let</span> <span class="ident">spacing</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">tt</span>.<span class="ident">spacing</span>() { |
| <span class="ident">Spacing::Joint</span> => <span class="ident">proc_macro::Spacing::Joint</span>, |
| <span class="ident">Spacing::Alone</span> => <span class="ident">proc_macro::Spacing::Alone</span>, |
| }; |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">punct</span> <span class="op">=</span> <span class="ident">proc_macro::Punct::new</span>(<span class="ident">tt</span>.<span class="ident">as_char</span>(), <span class="ident">spacing</span>); |
| <span class="ident">punct</span>.<span class="ident">set_span</span>(<span class="ident">tt</span>.<span class="ident">span</span>().<span class="ident">inner</span>.<span class="ident">unwrap_nightly</span>()); |
| <span class="ident">punct</span>.<span class="ident">into</span>() |
| } |
| <span class="ident">TokenTree::Ident</span>(<span class="ident">tt</span>) => <span class="ident">tt</span>.<span class="ident">inner</span>.<span class="ident">unwrap_nightly</span>().<span class="ident">into</span>(), |
| <span class="ident">TokenTree::Literal</span>(<span class="ident">tt</span>) => <span class="ident">tt</span>.<span class="ident">inner</span>.<span class="ident">unwrap_nightly</span>().<span class="ident">into</span>(), |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">From</span><span class="op"><</span><span class="ident">TokenTree</span><span class="op">></span> <span class="kw">for</span> <span class="ident">TokenStream</span> { |
| <span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">token</span>: <span class="ident">TokenTree</span>) -> <span class="ident">TokenStream</span> { |
| <span class="kw">if</span> <span class="ident">inside_proc_macro</span>() { |
| <span class="ident">TokenStream::Compiler</span>(<span class="ident">DeferredTokenStream::new</span>(<span class="ident">into_compiler_token</span>(<span class="ident">token</span>).<span class="ident">into</span>())) |
| } <span class="kw">else</span> { |
| <span class="ident">TokenStream::Fallback</span>(<span class="ident">token</span>.<span class="ident">into</span>()) |
| } |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">FromIterator</span><span class="op"><</span><span class="ident">TokenTree</span><span class="op">></span> <span class="kw">for</span> <span class="ident">TokenStream</span> { |
| <span class="kw">fn</span> <span class="ident">from_iter</span><span class="op"><</span><span class="ident">I</span>: <span class="ident">IntoIterator</span><span class="op"><</span><span class="ident">Item</span> <span class="op">=</span> <span class="ident">TokenTree</span><span class="op">></span><span class="op">></span>(<span class="ident">trees</span>: <span class="ident">I</span>) -> <span class="self">Self</span> { |
| <span class="kw">if</span> <span class="ident">inside_proc_macro</span>() { |
| <span class="ident">TokenStream::Compiler</span>(<span class="ident">DeferredTokenStream::new</span>( |
| <span class="ident">trees</span>.<span class="ident">into_iter</span>().<span class="ident">map</span>(<span class="ident">into_compiler_token</span>).<span class="ident">collect</span>(), |
| )) |
| } <span class="kw">else</span> { |
| <span class="ident">TokenStream::Fallback</span>(<span class="ident">trees</span>.<span class="ident">into_iter</span>().<span class="ident">collect</span>()) |
| } |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">FromIterator</span><span class="op"><</span><span class="ident">TokenStream</span><span class="op">></span> <span class="kw">for</span> <span class="ident">TokenStream</span> { |
| <span class="kw">fn</span> <span class="ident">from_iter</span><span class="op"><</span><span class="ident">I</span>: <span class="ident">IntoIterator</span><span class="op"><</span><span class="ident">Item</span> <span class="op">=</span> <span class="ident">TokenStream</span><span class="op">></span><span class="op">></span>(<span class="ident">streams</span>: <span class="ident">I</span>) -> <span class="self">Self</span> { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">streams</span> <span class="op">=</span> <span class="ident">streams</span>.<span class="ident">into_iter</span>(); |
| <span class="kw">match</span> <span class="ident">streams</span>.<span class="ident">next</span>() { |
| <span class="prelude-val">Some</span>(<span class="ident">TokenStream::Compiler</span>(<span class="kw-2">mut</span> <span class="ident">first</span>)) => { |
| <span class="ident">first</span>.<span class="ident">evaluate_now</span>(); |
| <span class="ident">first</span>.<span class="ident">stream</span>.<span class="ident">extend</span>(<span class="ident">streams</span>.<span class="ident">map</span>(<span class="op">|</span><span class="ident">s</span><span class="op">|</span> <span class="kw">match</span> <span class="ident">s</span> { |
| <span class="ident">TokenStream::Compiler</span>(<span class="ident">s</span>) => <span class="ident">s</span>.<span class="ident">into_token_stream</span>(), |
| <span class="ident">TokenStream::Fallback</span>(<span class="kw">_</span>) => <span class="ident">mismatch</span>(), |
| })); |
| <span class="ident">TokenStream::Compiler</span>(<span class="ident">first</span>) |
| } |
| <span class="prelude-val">Some</span>(<span class="ident">TokenStream::Fallback</span>(<span class="kw-2">mut</span> <span class="ident">first</span>)) => { |
| <span class="ident">first</span>.<span class="ident">extend</span>(<span class="ident">streams</span>.<span class="ident">map</span>(<span class="op">|</span><span class="ident">s</span><span class="op">|</span> <span class="kw">match</span> <span class="ident">s</span> { |
| <span class="ident">TokenStream::Fallback</span>(<span class="ident">s</span>) => <span class="ident">s</span>, |
| <span class="ident">TokenStream::Compiler</span>(<span class="kw">_</span>) => <span class="ident">mismatch</span>(), |
| })); |
| <span class="ident">TokenStream::Fallback</span>(<span class="ident">first</span>) |
| } |
| <span class="prelude-val">None</span> => <span class="ident">TokenStream::new</span>(), |
| } |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">Extend</span><span class="op"><</span><span class="ident">TokenTree</span><span class="op">></span> <span class="kw">for</span> <span class="ident">TokenStream</span> { |
| <span class="kw">fn</span> <span class="ident">extend</span><span class="op"><</span><span class="ident">I</span>: <span class="ident">IntoIterator</span><span class="op"><</span><span class="ident">Item</span> <span class="op">=</span> <span class="ident">TokenTree</span><span class="op">></span><span class="op">></span>(<span class="kw-2">&mut</span> <span class="self">self</span>, <span class="ident">stream</span>: <span class="ident">I</span>) { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="ident">TokenStream::Compiler</span>(<span class="ident">tts</span>) => { |
| <span class="comment">// Here is the reason for DeferredTokenStream.</span> |
| <span class="kw">for</span> <span class="ident">token</span> <span class="kw">in</span> <span class="ident">stream</span> { |
| <span class="ident">tts</span>.<span class="ident">extra</span>.<span class="ident">push</span>(<span class="ident">into_compiler_token</span>(<span class="ident">token</span>)); |
| } |
| } |
| <span class="ident">TokenStream::Fallback</span>(<span class="ident">tts</span>) => <span class="ident">tts</span>.<span class="ident">extend</span>(<span class="ident">stream</span>), |
| } |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">Extend</span><span class="op"><</span><span class="ident">TokenStream</span><span class="op">></span> <span class="kw">for</span> <span class="ident">TokenStream</span> { |
| <span class="kw">fn</span> <span class="ident">extend</span><span class="op"><</span><span class="ident">I</span>: <span class="ident">IntoIterator</span><span class="op"><</span><span class="ident">Item</span> <span class="op">=</span> <span class="ident">TokenStream</span><span class="op">></span><span class="op">></span>(<span class="kw-2">&mut</span> <span class="self">self</span>, <span class="ident">streams</span>: <span class="ident">I</span>) { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="ident">TokenStream::Compiler</span>(<span class="ident">tts</span>) => { |
| <span class="ident">tts</span>.<span class="ident">evaluate_now</span>(); |
| <span class="ident">tts</span>.<span class="ident">stream</span> |
| .<span class="ident">extend</span>(<span class="ident">streams</span>.<span class="ident">into_iter</span>().<span class="ident">map</span>(<span class="ident">TokenStream::unwrap_nightly</span>)); |
| } |
| <span class="ident">TokenStream::Fallback</span>(<span class="ident">tts</span>) => { |
| <span class="ident">tts</span>.<span class="ident">extend</span>(<span class="ident">streams</span>.<span class="ident">into_iter</span>().<span class="ident">map</span>(<span class="ident">TokenStream::unwrap_stable</span>)); |
| } |
| } |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">TokenStream</span> { |
| <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&mut</span> <span class="ident">fmt::Formatter</span>) -> <span class="ident">fmt::Result</span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="ident">TokenStream::Compiler</span>(<span class="ident">tts</span>) => <span class="ident">Debug::fmt</span>(<span class="kw-2">&</span><span class="ident">tts</span>.<span class="ident">clone</span>().<span class="ident">into_token_stream</span>(), <span class="ident">f</span>), |
| <span class="ident">TokenStream::Fallback</span>(<span class="ident">tts</span>) => <span class="ident">Debug::fmt</span>(<span class="ident">tts</span>, <span class="ident">f</span>), |
| } |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">LexError</span> { |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn</span> <span class="ident">span</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">Span</span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="ident">LexError::Compiler</span>(<span class="kw">_</span>) => <span class="ident">Span::call_site</span>(), |
| <span class="ident">LexError::Fallback</span>(<span class="ident">e</span>) => <span class="ident">Span::Fallback</span>(<span class="ident">e</span>.<span class="ident">span</span>()), |
| } |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">From</span><span class="op"><</span><span class="ident">proc_macro::LexError</span><span class="op">></span> <span class="kw">for</span> <span class="ident">LexError</span> { |
| <span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">e</span>: <span class="ident">proc_macro::LexError</span>) -> <span class="ident">LexError</span> { |
| <span class="ident">LexError::Compiler</span>(<span class="ident">e</span>) |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">From</span><span class="op"><</span><span class="ident">fallback::LexError</span><span class="op">></span> <span class="kw">for</span> <span class="ident">LexError</span> { |
| <span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">e</span>: <span class="ident">fallback::LexError</span>) -> <span class="ident">LexError</span> { |
| <span class="ident">LexError::Fallback</span>(<span class="ident">e</span>) |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">LexError</span> { |
| <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&mut</span> <span class="ident">fmt::Formatter</span>) -> <span class="ident">fmt::Result</span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="ident">LexError::Compiler</span>(<span class="ident">e</span>) => <span class="ident">Debug::fmt</span>(<span class="ident">e</span>, <span class="ident">f</span>), |
| <span class="ident">LexError::Fallback</span>(<span class="ident">e</span>) => <span class="ident">Debug::fmt</span>(<span class="ident">e</span>, <span class="ident">f</span>), |
| } |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">Display</span> <span class="kw">for</span> <span class="ident">LexError</span> { |
| <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&mut</span> <span class="ident">fmt::Formatter</span>) -> <span class="ident">fmt::Result</span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">no_lexerror_display</span>))]</span> |
| <span class="ident">LexError::Compiler</span>(<span class="ident">e</span>) => <span class="ident">Display::fmt</span>(<span class="ident">e</span>, <span class="ident">f</span>), |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">no_lexerror_display</span>)]</span> |
| <span class="ident">LexError::Compiler</span>(<span class="ident">_e</span>) => <span class="ident">Display::fmt</span>( |
| <span class="kw-2">&</span><span class="ident">fallback::LexError</span> { |
| <span class="ident">span</span>: <span class="ident">fallback::Span::call_site</span>(), |
| }, |
| <span class="ident">f</span>, |
| ), |
| <span class="ident">LexError::Fallback</span>(<span class="ident">e</span>) => <span class="ident">Display::fmt</span>(<span class="ident">e</span>, <span class="ident">f</span>), |
| } |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>)]</span> |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">enum</span> <span class="ident">TokenTreeIter</span> { |
| <span class="ident">Compiler</span>(<span class="ident">proc_macro::token_stream::IntoIter</span>), |
| <span class="ident">Fallback</span>(<span class="ident">fallback::TokenTreeIter</span>), |
| } |
| |
| <span class="kw">impl</span> <span class="ident">IntoIterator</span> <span class="kw">for</span> <span class="ident">TokenStream</span> { |
| <span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="ident">TokenTree</span>; |
| <span class="kw">type</span> <span class="ident">IntoIter</span> <span class="op">=</span> <span class="ident">TokenTreeIter</span>; |
| |
| <span class="kw">fn</span> <span class="ident">into_iter</span>(<span class="self">self</span>) -> <span class="ident">TokenTreeIter</span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="ident">TokenStream::Compiler</span>(<span class="ident">tts</span>) => { |
| <span class="ident">TokenTreeIter::Compiler</span>(<span class="ident">tts</span>.<span class="ident">into_token_stream</span>().<span class="ident">into_iter</span>()) |
| } |
| <span class="ident">TokenStream::Fallback</span>(<span class="ident">tts</span>) => <span class="ident">TokenTreeIter::Fallback</span>(<span class="ident">tts</span>.<span class="ident">into_iter</span>()), |
| } |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">TokenTreeIter</span> { |
| <span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="ident">TokenTree</span>; |
| |
| <span class="kw">fn</span> <span class="ident">next</span>(<span class="kw-2">&mut</span> <span class="self">self</span>) -> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">TokenTree</span><span class="op">></span> { |
| <span class="kw">let</span> <span class="ident">token</span> <span class="op">=</span> <span class="kw">match</span> <span class="self">self</span> { |
| <span class="ident">TokenTreeIter::Compiler</span>(<span class="ident">iter</span>) => <span class="ident">iter</span>.<span class="ident">next</span>()<span class="question-mark">?</span>, |
| <span class="ident">TokenTreeIter::Fallback</span>(<span class="ident">iter</span>) => <span class="kw">return</span> <span class="ident">iter</span>.<span class="ident">next</span>(), |
| }; |
| <span class="prelude-val">Some</span>(<span class="kw">match</span> <span class="ident">token</span> { |
| <span class="ident">proc_macro::TokenTree::Group</span>(<span class="ident">tt</span>) => <span class="ident"><span class="kw">crate</span>::Group::_new</span>(<span class="ident">Group::Compiler</span>(<span class="ident">tt</span>)).<span class="ident">into</span>(), |
| <span class="ident">proc_macro::TokenTree::Punct</span>(<span class="ident">tt</span>) => { |
| <span class="kw">let</span> <span class="ident">spacing</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">tt</span>.<span class="ident">spacing</span>() { |
| <span class="ident">proc_macro::Spacing::Joint</span> => <span class="ident">Spacing::Joint</span>, |
| <span class="ident">proc_macro::Spacing::Alone</span> => <span class="ident">Spacing::Alone</span>, |
| }; |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">o</span> <span class="op">=</span> <span class="ident">Punct::new</span>(<span class="ident">tt</span>.<span class="ident">as_char</span>(), <span class="ident">spacing</span>); |
| <span class="ident">o</span>.<span class="ident">set_span</span>(<span class="ident"><span class="kw">crate</span>::Span::_new</span>(<span class="ident">Span::Compiler</span>(<span class="ident">tt</span>.<span class="ident">span</span>()))); |
| <span class="ident">o</span>.<span class="ident">into</span>() |
| } |
| <span class="ident">proc_macro::TokenTree::Ident</span>(<span class="ident">s</span>) => <span class="ident"><span class="kw">crate</span>::Ident::_new</span>(<span class="ident">Ident::Compiler</span>(<span class="ident">s</span>)).<span class="ident">into</span>(), |
| <span class="ident">proc_macro::TokenTree::Literal</span>(<span class="ident">l</span>) => <span class="ident"><span class="kw">crate</span>::Literal::_new</span>(<span class="ident">Literal::Compiler</span>(<span class="ident">l</span>)).<span class="ident">into</span>(), |
| }) |
| } |
| |
| <span class="kw">fn</span> <span class="ident">size_hint</span>(<span class="kw-2">&</span><span class="self">self</span>) -> (<span class="ident">usize</span>, <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span>) { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="ident">TokenTreeIter::Compiler</span>(<span class="ident">tts</span>) => <span class="ident">tts</span>.<span class="ident">size_hint</span>(), |
| <span class="ident">TokenTreeIter::Fallback</span>(<span class="ident">tts</span>) => <span class="ident">tts</span>.<span class="ident">size_hint</span>(), |
| } |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">TokenTreeIter</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">debug_struct</span>(<span class="string">"TokenTreeIter"</span>).<span class="ident">finish</span>() |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">PartialEq</span>, <span class="ident">Eq</span>)]</span> |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">super_unstable</span>)]</span> |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">enum</span> <span class="ident">SourceFile</span> { |
| <span class="ident">Compiler</span>(<span class="ident">proc_macro::SourceFile</span>), |
| <span class="ident">Fallback</span>(<span class="ident">fallback::SourceFile</span>), |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">super_unstable</span>)]</span> |
| <span class="kw">impl</span> <span class="ident">SourceFile</span> { |
| <span class="kw">fn</span> <span class="ident">nightly</span>(<span class="ident">sf</span>: <span class="ident">proc_macro::SourceFile</span>) -> <span class="self">Self</span> { |
| <span class="ident">SourceFile::Compiler</span>(<span class="ident">sf</span>) |
| } |
| |
| <span class="doccomment">/// Get the path to this source file as a string.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">path</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">PathBuf</span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="ident">SourceFile::Compiler</span>(<span class="ident">a</span>) => <span class="ident">a</span>.<span class="ident">path</span>(), |
| <span class="ident">SourceFile::Fallback</span>(<span class="ident">a</span>) => <span class="ident">a</span>.<span class="ident">path</span>(), |
| } |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_real</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">bool</span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="ident">SourceFile::Compiler</span>(<span class="ident">a</span>) => <span class="ident">a</span>.<span class="ident">is_real</span>(), |
| <span class="ident">SourceFile::Fallback</span>(<span class="ident">a</span>) => <span class="ident">a</span>.<span class="ident">is_real</span>(), |
| } |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">super_unstable</span>)]</span> |
| <span class="kw">impl</span> <span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">SourceFile</span> { |
| <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&mut</span> <span class="ident">fmt::Formatter</span>) -> <span class="ident">fmt::Result</span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="ident">SourceFile::Compiler</span>(<span class="ident">a</span>) => <span class="ident">Debug::fmt</span>(<span class="ident">a</span>, <span class="ident">f</span>), |
| <span class="ident">SourceFile::Fallback</span>(<span class="ident">a</span>) => <span class="ident">Debug::fmt</span>(<span class="ident">a</span>, <span class="ident">f</span>), |
| } |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">any</span>(<span class="ident">super_unstable</span>, <span class="ident">feature</span> <span class="op">=</span> <span class="string">"span-locations"</span>))]</span> |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct</span> <span class="ident">LineColumn</span> { |
| <span class="kw">pub</span> <span class="ident">line</span>: <span class="ident">usize</span>, |
| <span class="kw">pub</span> <span class="ident">column</span>: <span class="ident">usize</span>, |
| } |
| |
| <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Copy</span>, <span class="ident">Clone</span>)]</span> |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">enum</span> <span class="ident">Span</span> { |
| <span class="ident">Compiler</span>(<span class="ident">proc_macro::Span</span>), |
| <span class="ident">Fallback</span>(<span class="ident">fallback::Span</span>), |
| } |
| |
| <span class="kw">impl</span> <span class="ident">Span</span> { |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">call_site</span>() -> <span class="self">Self</span> { |
| <span class="kw">if</span> <span class="ident">inside_proc_macro</span>() { |
| <span class="ident">Span::Compiler</span>(<span class="ident">proc_macro::Span::call_site</span>()) |
| } <span class="kw">else</span> { |
| <span class="ident">Span::Fallback</span>(<span class="ident">fallback::Span::call_site</span>()) |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">no_hygiene</span>))]</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">mixed_site</span>() -> <span class="self">Self</span> { |
| <span class="kw">if</span> <span class="ident">inside_proc_macro</span>() { |
| <span class="ident">Span::Compiler</span>(<span class="ident">proc_macro::Span::mixed_site</span>()) |
| } <span class="kw">else</span> { |
| <span class="ident">Span::Fallback</span>(<span class="ident">fallback::Span::mixed_site</span>()) |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">super_unstable</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">def_site</span>() -> <span class="self">Self</span> { |
| <span class="kw">if</span> <span class="ident">inside_proc_macro</span>() { |
| <span class="ident">Span::Compiler</span>(<span class="ident">proc_macro::Span::def_site</span>()) |
| } <span class="kw">else</span> { |
| <span class="ident">Span::Fallback</span>(<span class="ident">fallback::Span::def_site</span>()) |
| } |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">resolved_at</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">other</span>: <span class="ident">Span</span>) -> <span class="ident">Span</span> { |
| <span class="kw">match</span> (<span class="self">self</span>, <span class="ident">other</span>) { |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">no_hygiene</span>))]</span> |
| (<span class="ident">Span::Compiler</span>(<span class="ident">a</span>), <span class="ident">Span::Compiler</span>(<span class="ident">b</span>)) => <span class="ident">Span::Compiler</span>(<span class="ident">a</span>.<span class="ident">resolved_at</span>(<span class="ident">b</span>)), |
| |
| <span class="comment">// Name resolution affects semantics, but location is only cosmetic</span> |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">no_hygiene</span>)]</span> |
| (<span class="ident">Span::Compiler</span>(<span class="kw">_</span>), <span class="ident">Span::Compiler</span>(<span class="kw">_</span>)) => <span class="ident">other</span>, |
| |
| (<span class="ident">Span::Fallback</span>(<span class="ident">a</span>), <span class="ident">Span::Fallback</span>(<span class="ident">b</span>)) => <span class="ident">Span::Fallback</span>(<span class="ident">a</span>.<span class="ident">resolved_at</span>(<span class="ident">b</span>)), |
| <span class="kw">_</span> => <span class="ident">mismatch</span>(), |
| } |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">located_at</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">other</span>: <span class="ident">Span</span>) -> <span class="ident">Span</span> { |
| <span class="kw">match</span> (<span class="self">self</span>, <span class="ident">other</span>) { |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">no_hygiene</span>))]</span> |
| (<span class="ident">Span::Compiler</span>(<span class="ident">a</span>), <span class="ident">Span::Compiler</span>(<span class="ident">b</span>)) => <span class="ident">Span::Compiler</span>(<span class="ident">a</span>.<span class="ident">located_at</span>(<span class="ident">b</span>)), |
| |
| <span class="comment">// Name resolution affects semantics, but location is only cosmetic</span> |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">no_hygiene</span>)]</span> |
| (<span class="ident">Span::Compiler</span>(<span class="kw">_</span>), <span class="ident">Span::Compiler</span>(<span class="kw">_</span>)) => <span class="kw-2">*</span><span class="self">self</span>, |
| |
| (<span class="ident">Span::Fallback</span>(<span class="ident">a</span>), <span class="ident">Span::Fallback</span>(<span class="ident">b</span>)) => <span class="ident">Span::Fallback</span>(<span class="ident">a</span>.<span class="ident">located_at</span>(<span class="ident">b</span>)), |
| <span class="kw">_</span> => <span class="ident">mismatch</span>(), |
| } |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">unwrap</span>(<span class="self">self</span>) -> <span class="ident">proc_macro::Span</span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="ident">Span::Compiler</span>(<span class="ident">s</span>) => <span class="ident">s</span>, |
| <span class="ident">Span::Fallback</span>(<span class="kw">_</span>) => <span class="macro">panic!</span>(<span class="string">"proc_macro::Span is only available in procedural macros"</span>), |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">super_unstable</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">source_file</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">SourceFile</span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="ident">Span::Compiler</span>(<span class="ident">s</span>) => <span class="ident">SourceFile::nightly</span>(<span class="ident">s</span>.<span class="ident">source_file</span>()), |
| <span class="ident">Span::Fallback</span>(<span class="ident">s</span>) => <span class="ident">SourceFile::Fallback</span>(<span class="ident">s</span>.<span class="ident">source_file</span>()), |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">any</span>(<span class="ident">super_unstable</span>, <span class="ident">feature</span> <span class="op">=</span> <span class="string">"span-locations"</span>))]</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">start</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">LineColumn</span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">proc_macro_span</span>)]</span> |
| <span class="ident">Span::Compiler</span>(<span class="ident">s</span>) => { |
| <span class="kw">let</span> <span class="ident">proc_macro::LineColumn</span> { <span class="ident">line</span>, <span class="ident">column</span> } <span class="op">=</span> <span class="ident">s</span>.<span class="ident">start</span>(); |
| <span class="ident">LineColumn</span> { <span class="ident">line</span>, <span class="ident">column</span> } |
| } |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">proc_macro_span</span>))]</span> |
| <span class="ident">Span::Compiler</span>(<span class="kw">_</span>) => <span class="ident">LineColumn</span> { <span class="ident">line</span>: <span class="number">0</span>, <span class="ident">column</span>: <span class="number">0</span> }, |
| <span class="ident">Span::Fallback</span>(<span class="ident">s</span>) => { |
| <span class="kw">let</span> <span class="ident">fallback::LineColumn</span> { <span class="ident">line</span>, <span class="ident">column</span> } <span class="op">=</span> <span class="ident">s</span>.<span class="ident">start</span>(); |
| <span class="ident">LineColumn</span> { <span class="ident">line</span>, <span class="ident">column</span> } |
| } |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">any</span>(<span class="ident">super_unstable</span>, <span class="ident">feature</span> <span class="op">=</span> <span class="string">"span-locations"</span>))]</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">end</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">LineColumn</span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">proc_macro_span</span>)]</span> |
| <span class="ident">Span::Compiler</span>(<span class="ident">s</span>) => { |
| <span class="kw">let</span> <span class="ident">proc_macro::LineColumn</span> { <span class="ident">line</span>, <span class="ident">column</span> } <span class="op">=</span> <span class="ident">s</span>.<span class="ident">end</span>(); |
| <span class="ident">LineColumn</span> { <span class="ident">line</span>, <span class="ident">column</span> } |
| } |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">proc_macro_span</span>))]</span> |
| <span class="ident">Span::Compiler</span>(<span class="kw">_</span>) => <span class="ident">LineColumn</span> { <span class="ident">line</span>: <span class="number">0</span>, <span class="ident">column</span>: <span class="number">0</span> }, |
| <span class="ident">Span::Fallback</span>(<span class="ident">s</span>) => { |
| <span class="kw">let</span> <span class="ident">fallback::LineColumn</span> { <span class="ident">line</span>, <span class="ident">column</span> } <span class="op">=</span> <span class="ident">s</span>.<span class="ident">end</span>(); |
| <span class="ident">LineColumn</span> { <span class="ident">line</span>, <span class="ident">column</span> } |
| } |
| } |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">join</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">other</span>: <span class="ident">Span</span>) -> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Span</span><span class="op">></span> { |
| <span class="kw">let</span> <span class="ident">ret</span> <span class="op">=</span> <span class="kw">match</span> (<span class="self">self</span>, <span class="ident">other</span>) { |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">proc_macro_span</span>)]</span> |
| (<span class="ident">Span::Compiler</span>(<span class="ident">a</span>), <span class="ident">Span::Compiler</span>(<span class="ident">b</span>)) => <span class="ident">Span::Compiler</span>(<span class="ident">a</span>.<span class="ident">join</span>(<span class="ident">b</span>)<span class="question-mark">?</span>), |
| (<span class="ident">Span::Fallback</span>(<span class="ident">a</span>), <span class="ident">Span::Fallback</span>(<span class="ident">b</span>)) => <span class="ident">Span::Fallback</span>(<span class="ident">a</span>.<span class="ident">join</span>(<span class="ident">b</span>)<span class="question-mark">?</span>), |
| <span class="kw">_</span> => <span class="kw">return</span> <span class="prelude-val">None</span>, |
| }; |
| <span class="prelude-val">Some</span>(<span class="ident">ret</span>) |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">super_unstable</span>)]</span> |
| <span class="kw">pub</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="ident">Span</span>) -> <span class="ident">bool</span> { |
| <span class="kw">match</span> (<span class="self">self</span>, <span class="ident">other</span>) { |
| (<span class="ident">Span::Compiler</span>(<span class="ident">a</span>), <span class="ident">Span::Compiler</span>(<span class="ident">b</span>)) => <span class="ident">a</span>.<span class="ident">eq</span>(<span class="ident">b</span>), |
| (<span class="ident">Span::Fallback</span>(<span class="ident">a</span>), <span class="ident">Span::Fallback</span>(<span class="ident">b</span>)) => <span class="ident">a</span>.<span class="ident">eq</span>(<span class="ident">b</span>), |
| <span class="kw">_</span> => <span class="bool-val">false</span>, |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">unwrap_nightly</span>(<span class="self">self</span>) -> <span class="ident">proc_macro::Span</span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="ident">Span::Compiler</span>(<span class="ident">s</span>) => <span class="ident">s</span>, |
| <span class="ident">Span::Fallback</span>(<span class="kw">_</span>) => <span class="ident">mismatch</span>(), |
| } |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">From</span><span class="op"><</span><span class="ident">proc_macro::Span</span><span class="op">></span> <span class="kw">for</span> <span class="ident"><span class="kw">crate</span>::Span</span> { |
| <span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">proc_span</span>: <span class="ident">proc_macro::Span</span>) -> <span class="ident"><span class="kw">crate</span>::Span</span> { |
| <span class="ident"><span class="kw">crate</span>::Span::_new</span>(<span class="ident">Span::Compiler</span>(<span class="ident">proc_span</span>)) |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">From</span><span class="op"><</span><span class="ident">fallback::Span</span><span class="op">></span> <span class="kw">for</span> <span class="ident">Span</span> { |
| <span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">inner</span>: <span class="ident">fallback::Span</span>) -> <span class="ident">Span</span> { |
| <span class="ident">Span::Fallback</span>(<span class="ident">inner</span>) |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">Span</span> { |
| <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&mut</span> <span class="ident">fmt::Formatter</span>) -> <span class="ident">fmt::Result</span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="ident">Span::Compiler</span>(<span class="ident">s</span>) => <span class="ident">Debug::fmt</span>(<span class="ident">s</span>, <span class="ident">f</span>), |
| <span class="ident">Span::Fallback</span>(<span class="ident">s</span>) => <span class="ident">Debug::fmt</span>(<span class="ident">s</span>, <span class="ident">f</span>), |
| } |
| } |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn</span> <span class="ident">debug_span_field_if_nontrivial</span>(<span class="ident">debug</span>: <span class="kw-2">&mut</span> <span class="ident">fmt::DebugStruct</span>, <span class="ident">span</span>: <span class="ident">Span</span>) { |
| <span class="kw">match</span> <span class="ident">span</span> { |
| <span class="ident">Span::Compiler</span>(<span class="ident">s</span>) => { |
| <span class="ident">debug</span>.<span class="ident">field</span>(<span class="string">"span"</span>, <span class="kw-2">&</span><span class="ident">s</span>); |
| } |
| <span class="ident">Span::Fallback</span>(<span class="ident">s</span>) => <span class="ident">fallback::debug_span_field_if_nontrivial</span>(<span class="ident">debug</span>, <span class="ident">s</span>), |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>)]</span> |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">enum</span> <span class="ident">Group</span> { |
| <span class="ident">Compiler</span>(<span class="ident">proc_macro::Group</span>), |
| <span class="ident">Fallback</span>(<span class="ident">fallback::Group</span>), |
| } |
| |
| <span class="kw">impl</span> <span class="ident">Group</span> { |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">delimiter</span>: <span class="ident">Delimiter</span>, <span class="ident">stream</span>: <span class="ident">TokenStream</span>) -> <span class="self">Self</span> { |
| <span class="kw">match</span> <span class="ident">stream</span> { |
| <span class="ident">TokenStream::Compiler</span>(<span class="ident">tts</span>) => { |
| <span class="kw">let</span> <span class="ident">delimiter</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">delimiter</span> { |
| <span class="ident">Delimiter::Parenthesis</span> => <span class="ident">proc_macro::Delimiter::Parenthesis</span>, |
| <span class="ident">Delimiter::Bracket</span> => <span class="ident">proc_macro::Delimiter::Bracket</span>, |
| <span class="ident">Delimiter::Brace</span> => <span class="ident">proc_macro::Delimiter::Brace</span>, |
| <span class="ident">Delimiter::None</span> => <span class="ident">proc_macro::Delimiter::None</span>, |
| }; |
| <span class="ident">Group::Compiler</span>(<span class="ident">proc_macro::Group::new</span>(<span class="ident">delimiter</span>, <span class="ident">tts</span>.<span class="ident">into_token_stream</span>())) |
| } |
| <span class="ident">TokenStream::Fallback</span>(<span class="ident">stream</span>) => { |
| <span class="ident">Group::Fallback</span>(<span class="ident">fallback::Group::new</span>(<span class="ident">delimiter</span>, <span class="ident">stream</span>)) |
| } |
| } |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">delimiter</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">Delimiter</span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="ident">Group::Compiler</span>(<span class="ident">g</span>) => <span class="kw">match</span> <span class="ident">g</span>.<span class="ident">delimiter</span>() { |
| <span class="ident">proc_macro::Delimiter::Parenthesis</span> => <span class="ident">Delimiter::Parenthesis</span>, |
| <span class="ident">proc_macro::Delimiter::Bracket</span> => <span class="ident">Delimiter::Bracket</span>, |
| <span class="ident">proc_macro::Delimiter::Brace</span> => <span class="ident">Delimiter::Brace</span>, |
| <span class="ident">proc_macro::Delimiter::None</span> => <span class="ident">Delimiter::None</span>, |
| }, |
| <span class="ident">Group::Fallback</span>(<span class="ident">g</span>) => <span class="ident">g</span>.<span class="ident">delimiter</span>(), |
| } |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">stream</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">TokenStream</span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="ident">Group::Compiler</span>(<span class="ident">g</span>) => <span class="ident">TokenStream::Compiler</span>(<span class="ident">DeferredTokenStream::new</span>(<span class="ident">g</span>.<span class="ident">stream</span>())), |
| <span class="ident">Group::Fallback</span>(<span class="ident">g</span>) => <span class="ident">TokenStream::Fallback</span>(<span class="ident">g</span>.<span class="ident">stream</span>()), |
| } |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">span</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">Span</span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="ident">Group::Compiler</span>(<span class="ident">g</span>) => <span class="ident">Span::Compiler</span>(<span class="ident">g</span>.<span class="ident">span</span>()), |
| <span class="ident">Group::Fallback</span>(<span class="ident">g</span>) => <span class="ident">Span::Fallback</span>(<span class="ident">g</span>.<span class="ident">span</span>()), |
| } |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">span_open</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">Span</span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">no_group_open_close</span>))]</span> |
| <span class="ident">Group::Compiler</span>(<span class="ident">g</span>) => <span class="ident">Span::Compiler</span>(<span class="ident">g</span>.<span class="ident">span_open</span>()), |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">no_group_open_close</span>)]</span> |
| <span class="ident">Group::Compiler</span>(<span class="ident">g</span>) => <span class="ident">Span::Compiler</span>(<span class="ident">g</span>.<span class="ident">span</span>()), |
| <span class="ident">Group::Fallback</span>(<span class="ident">g</span>) => <span class="ident">Span::Fallback</span>(<span class="ident">g</span>.<span class="ident">span_open</span>()), |
| } |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">span_close</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">Span</span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">no_group_open_close</span>))]</span> |
| <span class="ident">Group::Compiler</span>(<span class="ident">g</span>) => <span class="ident">Span::Compiler</span>(<span class="ident">g</span>.<span class="ident">span_close</span>()), |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">no_group_open_close</span>)]</span> |
| <span class="ident">Group::Compiler</span>(<span class="ident">g</span>) => <span class="ident">Span::Compiler</span>(<span class="ident">g</span>.<span class="ident">span</span>()), |
| <span class="ident">Group::Fallback</span>(<span class="ident">g</span>) => <span class="ident">Span::Fallback</span>(<span class="ident">g</span>.<span class="ident">span_close</span>()), |
| } |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_span</span>(<span class="kw-2">&mut</span> <span class="self">self</span>, <span class="ident">span</span>: <span class="ident">Span</span>) { |
| <span class="kw">match</span> (<span class="self">self</span>, <span class="ident">span</span>) { |
| (<span class="ident">Group::Compiler</span>(<span class="ident">g</span>), <span class="ident">Span::Compiler</span>(<span class="ident">s</span>)) => <span class="ident">g</span>.<span class="ident">set_span</span>(<span class="ident">s</span>), |
| (<span class="ident">Group::Fallback</span>(<span class="ident">g</span>), <span class="ident">Span::Fallback</span>(<span class="ident">s</span>)) => <span class="ident">g</span>.<span class="ident">set_span</span>(<span class="ident">s</span>), |
| <span class="kw">_</span> => <span class="ident">mismatch</span>(), |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">unwrap_nightly</span>(<span class="self">self</span>) -> <span class="ident">proc_macro::Group</span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="ident">Group::Compiler</span>(<span class="ident">g</span>) => <span class="ident">g</span>, |
| <span class="ident">Group::Fallback</span>(<span class="kw">_</span>) => <span class="ident">mismatch</span>(), |
| } |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">From</span><span class="op"><</span><span class="ident">fallback::Group</span><span class="op">></span> <span class="kw">for</span> <span class="ident">Group</span> { |
| <span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">g</span>: <span class="ident">fallback::Group</span>) -> <span class="self">Self</span> { |
| <span class="ident">Group::Fallback</span>(<span class="ident">g</span>) |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">Display</span> <span class="kw">for</span> <span class="ident">Group</span> { |
| <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">formatter</span>: <span class="kw-2">&mut</span> <span class="ident">fmt::Formatter</span>) -> <span class="ident">fmt::Result</span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="ident">Group::Compiler</span>(<span class="ident">group</span>) => <span class="ident">Display::fmt</span>(<span class="ident">group</span>, <span class="ident">formatter</span>), |
| <span class="ident">Group::Fallback</span>(<span class="ident">group</span>) => <span class="ident">Display::fmt</span>(<span class="ident">group</span>, <span class="ident">formatter</span>), |
| } |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">Group</span> { |
| <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">formatter</span>: <span class="kw-2">&mut</span> <span class="ident">fmt::Formatter</span>) -> <span class="ident">fmt::Result</span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="ident">Group::Compiler</span>(<span class="ident">group</span>) => <span class="ident">Debug::fmt</span>(<span class="ident">group</span>, <span class="ident">formatter</span>), |
| <span class="ident">Group::Fallback</span>(<span class="ident">group</span>) => <span class="ident">Debug::fmt</span>(<span class="ident">group</span>, <span class="ident">formatter</span>), |
| } |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>)]</span> |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">enum</span> <span class="ident">Ident</span> { |
| <span class="ident">Compiler</span>(<span class="ident">proc_macro::Ident</span>), |
| <span class="ident">Fallback</span>(<span class="ident">fallback::Ident</span>), |
| } |
| |
| <span class="kw">impl</span> <span class="ident">Ident</span> { |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">string</span>: <span class="kw-2">&</span><span class="ident">str</span>, <span class="ident">span</span>: <span class="ident">Span</span>) -> <span class="self">Self</span> { |
| <span class="kw">match</span> <span class="ident">span</span> { |
| <span class="ident">Span::Compiler</span>(<span class="ident">s</span>) => <span class="ident">Ident::Compiler</span>(<span class="ident">proc_macro::Ident::new</span>(<span class="ident">string</span>, <span class="ident">s</span>)), |
| <span class="ident">Span::Fallback</span>(<span class="ident">s</span>) => <span class="ident">Ident::Fallback</span>(<span class="ident">fallback::Ident::new</span>(<span class="ident">string</span>, <span class="ident">s</span>)), |
| } |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new_raw</span>(<span class="ident">string</span>: <span class="kw-2">&</span><span class="ident">str</span>, <span class="ident">span</span>: <span class="ident">Span</span>) -> <span class="self">Self</span> { |
| <span class="kw">match</span> <span class="ident">span</span> { |
| <span class="ident">Span::Compiler</span>(<span class="ident">s</span>) => { |
| <span class="kw">let</span> <span class="ident">p</span>: <span class="ident">proc_macro::TokenStream</span> <span class="op">=</span> <span class="ident">string</span>.<span class="ident">parse</span>().<span class="ident">unwrap</span>(); |
| <span class="kw">let</span> <span class="ident">ident</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">p</span>.<span class="ident">into_iter</span>().<span class="ident">next</span>() { |
| <span class="prelude-val">Some</span>(<span class="ident">proc_macro::TokenTree::Ident</span>(<span class="kw-2">mut</span> <span class="ident">i</span>)) => { |
| <span class="ident">i</span>.<span class="ident">set_span</span>(<span class="ident">s</span>); |
| <span class="ident">i</span> |
| } |
| <span class="kw">_</span> => <span class="macro">panic!</span>(), |
| }; |
| <span class="ident">Ident::Compiler</span>(<span class="ident">ident</span>) |
| } |
| <span class="ident">Span::Fallback</span>(<span class="ident">s</span>) => <span class="ident">Ident::Fallback</span>(<span class="ident">fallback::Ident::new_raw</span>(<span class="ident">string</span>, <span class="ident">s</span>)), |
| } |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">span</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">Span</span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="ident">Ident::Compiler</span>(<span class="ident">t</span>) => <span class="ident">Span::Compiler</span>(<span class="ident">t</span>.<span class="ident">span</span>()), |
| <span class="ident">Ident::Fallback</span>(<span class="ident">t</span>) => <span class="ident">Span::Fallback</span>(<span class="ident">t</span>.<span class="ident">span</span>()), |
| } |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_span</span>(<span class="kw-2">&mut</span> <span class="self">self</span>, <span class="ident">span</span>: <span class="ident">Span</span>) { |
| <span class="kw">match</span> (<span class="self">self</span>, <span class="ident">span</span>) { |
| (<span class="ident">Ident::Compiler</span>(<span class="ident">t</span>), <span class="ident">Span::Compiler</span>(<span class="ident">s</span>)) => <span class="ident">t</span>.<span class="ident">set_span</span>(<span class="ident">s</span>), |
| (<span class="ident">Ident::Fallback</span>(<span class="ident">t</span>), <span class="ident">Span::Fallback</span>(<span class="ident">s</span>)) => <span class="ident">t</span>.<span class="ident">set_span</span>(<span class="ident">s</span>), |
| <span class="kw">_</span> => <span class="ident">mismatch</span>(), |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">unwrap_nightly</span>(<span class="self">self</span>) -> <span class="ident">proc_macro::Ident</span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="ident">Ident::Compiler</span>(<span class="ident">s</span>) => <span class="ident">s</span>, |
| <span class="ident">Ident::Fallback</span>(<span class="kw">_</span>) => <span class="ident">mismatch</span>(), |
| } |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">PartialEq</span> <span class="kw">for</span> <span class="ident">Ident</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="ident">Ident</span>) -> <span class="ident">bool</span> { |
| <span class="kw">match</span> (<span class="self">self</span>, <span class="ident">other</span>) { |
| (<span class="ident">Ident::Compiler</span>(<span class="ident">t</span>), <span class="ident">Ident::Compiler</span>(<span class="ident">o</span>)) => <span class="ident">t</span>.<span class="ident">to_string</span>() <span class="op">==</span> <span class="ident">o</span>.<span class="ident">to_string</span>(), |
| (<span class="ident">Ident::Fallback</span>(<span class="ident">t</span>), <span class="ident">Ident::Fallback</span>(<span class="ident">o</span>)) => <span class="ident">t</span> <span class="op">==</span> <span class="ident">o</span>, |
| <span class="kw">_</span> => <span class="ident">mismatch</span>(), |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="ident">PartialEq</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">for</span> <span class="ident">Ident</span> |
| <span class="kw">where</span> |
| <span class="ident">T</span>: <span class="question-mark">?</span><span class="ident">Sized</span> <span class="op">+</span> <span class="ident">AsRef</span><span class="op"><</span><span class="ident">str</span><span class="op">></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="ident">T</span>) -> <span class="ident">bool</span> { |
| <span class="kw">let</span> <span class="ident">other</span> <span class="op">=</span> <span class="ident">other</span>.<span class="ident">as_ref</span>(); |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="ident">Ident::Compiler</span>(<span class="ident">t</span>) => <span class="ident">t</span>.<span class="ident">to_string</span>() <span class="op">==</span> <span class="ident">other</span>, |
| <span class="ident">Ident::Fallback</span>(<span class="ident">t</span>) => <span class="ident">t</span> <span class="op">==</span> <span class="ident">other</span>, |
| } |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">Display</span> <span class="kw">for</span> <span class="ident">Ident</span> { |
| <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&mut</span> <span class="ident">fmt::Formatter</span>) -> <span class="ident">fmt::Result</span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="ident">Ident::Compiler</span>(<span class="ident">t</span>) => <span class="ident">Display::fmt</span>(<span class="ident">t</span>, <span class="ident">f</span>), |
| <span class="ident">Ident::Fallback</span>(<span class="ident">t</span>) => <span class="ident">Display::fmt</span>(<span class="ident">t</span>, <span class="ident">f</span>), |
| } |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">Ident</span> { |
| <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&mut</span> <span class="ident">fmt::Formatter</span>) -> <span class="ident">fmt::Result</span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="ident">Ident::Compiler</span>(<span class="ident">t</span>) => <span class="ident">Debug::fmt</span>(<span class="ident">t</span>, <span class="ident">f</span>), |
| <span class="ident">Ident::Fallback</span>(<span class="ident">t</span>) => <span class="ident">Debug::fmt</span>(<span class="ident">t</span>, <span class="ident">f</span>), |
| } |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>)]</span> |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">enum</span> <span class="ident">Literal</span> { |
| <span class="ident">Compiler</span>(<span class="ident">proc_macro::Literal</span>), |
| <span class="ident">Fallback</span>(<span class="ident">fallback::Literal</span>), |
| } |
| |
| <span class="macro">macro_rules!</span> <span class="ident">suffixed_numbers</span> { |
| ($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span> => <span class="macro-nonterminal">$</span><span class="macro-nonterminal">kind</span>:<span class="ident">ident</span>,)<span class="kw-2">*</span>) => ($( |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>(<span class="ident">n</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">kind</span>) -> <span class="ident">Literal</span> { |
| <span class="kw">if</span> <span class="ident">inside_proc_macro</span>() { |
| <span class="ident">Literal::Compiler</span>(<span class="ident">proc_macro::Literal</span>::<span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>(<span class="ident">n</span>)) |
| } <span class="kw">else</span> { |
| <span class="ident">Literal::Fallback</span>(<span class="ident">fallback::Literal</span>::<span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>(<span class="ident">n</span>)) |
| } |
| } |
| )<span class="kw-2">*</span>) |
| } |
| |
| <span class="macro">macro_rules!</span> <span class="ident">unsuffixed_integers</span> { |
| ($(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">ident</span> => <span class="macro-nonterminal">$</span><span class="macro-nonterminal">kind</span>:<span class="ident">ident</span>,)<span class="kw-2">*</span>) => ($( |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>(<span class="ident">n</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">kind</span>) -> <span class="ident">Literal</span> { |
| <span class="kw">if</span> <span class="ident">inside_proc_macro</span>() { |
| <span class="ident">Literal::Compiler</span>(<span class="ident">proc_macro::Literal</span>::<span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>(<span class="ident">n</span>)) |
| } <span class="kw">else</span> { |
| <span class="ident">Literal::Fallback</span>(<span class="ident">fallback::Literal</span>::<span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>(<span class="ident">n</span>)) |
| } |
| } |
| )<span class="kw-2">*</span>) |
| } |
| |
| <span class="kw">impl</span> <span class="ident">Literal</span> { |
| <span class="kw">pub</span> <span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">from_str_unchecked</span>(<span class="ident">repr</span>: <span class="kw-2">&</span><span class="ident">str</span>) -> <span class="self">Self</span> { |
| <span class="kw">if</span> <span class="ident">inside_proc_macro</span>() { |
| <span class="ident">Literal::Compiler</span>(<span class="ident">compiler_literal_from_str</span>(<span class="ident">repr</span>).<span class="ident">expect</span>(<span class="string">"invalid literal"</span>)) |
| } <span class="kw">else</span> { |
| <span class="ident">Literal::Fallback</span>(<span class="ident">fallback::Literal::from_str_unchecked</span>(<span class="ident">repr</span>)) |
| } |
| } |
| |
| <span class="macro">suffixed_numbers!</span> { |
| <span class="ident">u8_suffixed</span> => <span class="ident">u8</span>, |
| <span class="ident">u16_suffixed</span> => <span class="ident">u16</span>, |
| <span class="ident">u32_suffixed</span> => <span class="ident">u32</span>, |
| <span class="ident">u64_suffixed</span> => <span class="ident">u64</span>, |
| <span class="ident">u128_suffixed</span> => <span class="ident">u128</span>, |
| <span class="ident">usize_suffixed</span> => <span class="ident">usize</span>, |
| <span class="ident">i8_suffixed</span> => <span class="ident">i8</span>, |
| <span class="ident">i16_suffixed</span> => <span class="ident">i16</span>, |
| <span class="ident">i32_suffixed</span> => <span class="ident">i32</span>, |
| <span class="ident">i64_suffixed</span> => <span class="ident">i64</span>, |
| <span class="ident">i128_suffixed</span> => <span class="ident">i128</span>, |
| <span class="ident">isize_suffixed</span> => <span class="ident">isize</span>, |
| |
| <span class="ident">f32_suffixed</span> => <span class="ident">f32</span>, |
| <span class="ident">f64_suffixed</span> => <span class="ident">f64</span>, |
| } |
| |
| <span class="macro">unsuffixed_integers!</span> { |
| <span class="ident">u8_unsuffixed</span> => <span class="ident">u8</span>, |
| <span class="ident">u16_unsuffixed</span> => <span class="ident">u16</span>, |
| <span class="ident">u32_unsuffixed</span> => <span class="ident">u32</span>, |
| <span class="ident">u64_unsuffixed</span> => <span class="ident">u64</span>, |
| <span class="ident">u128_unsuffixed</span> => <span class="ident">u128</span>, |
| <span class="ident">usize_unsuffixed</span> => <span class="ident">usize</span>, |
| <span class="ident">i8_unsuffixed</span> => <span class="ident">i8</span>, |
| <span class="ident">i16_unsuffixed</span> => <span class="ident">i16</span>, |
| <span class="ident">i32_unsuffixed</span> => <span class="ident">i32</span>, |
| <span class="ident">i64_unsuffixed</span> => <span class="ident">i64</span>, |
| <span class="ident">i128_unsuffixed</span> => <span class="ident">i128</span>, |
| <span class="ident">isize_unsuffixed</span> => <span class="ident">isize</span>, |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">f32_unsuffixed</span>(<span class="ident">f</span>: <span class="ident">f32</span>) -> <span class="ident">Literal</span> { |
| <span class="kw">if</span> <span class="ident">inside_proc_macro</span>() { |
| <span class="ident">Literal::Compiler</span>(<span class="ident">proc_macro::Literal::f32_unsuffixed</span>(<span class="ident">f</span>)) |
| } <span class="kw">else</span> { |
| <span class="ident">Literal::Fallback</span>(<span class="ident">fallback::Literal::f32_unsuffixed</span>(<span class="ident">f</span>)) |
| } |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">f64_unsuffixed</span>(<span class="ident">f</span>: <span class="ident">f64</span>) -> <span class="ident">Literal</span> { |
| <span class="kw">if</span> <span class="ident">inside_proc_macro</span>() { |
| <span class="ident">Literal::Compiler</span>(<span class="ident">proc_macro::Literal::f64_unsuffixed</span>(<span class="ident">f</span>)) |
| } <span class="kw">else</span> { |
| <span class="ident">Literal::Fallback</span>(<span class="ident">fallback::Literal::f64_unsuffixed</span>(<span class="ident">f</span>)) |
| } |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">string</span>(<span class="ident">t</span>: <span class="kw-2">&</span><span class="ident">str</span>) -> <span class="ident">Literal</span> { |
| <span class="kw">if</span> <span class="ident">inside_proc_macro</span>() { |
| <span class="ident">Literal::Compiler</span>(<span class="ident">proc_macro::Literal::string</span>(<span class="ident">t</span>)) |
| } <span class="kw">else</span> { |
| <span class="ident">Literal::Fallback</span>(<span class="ident">fallback::Literal::string</span>(<span class="ident">t</span>)) |
| } |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">character</span>(<span class="ident">t</span>: <span class="ident">char</span>) -> <span class="ident">Literal</span> { |
| <span class="kw">if</span> <span class="ident">inside_proc_macro</span>() { |
| <span class="ident">Literal::Compiler</span>(<span class="ident">proc_macro::Literal::character</span>(<span class="ident">t</span>)) |
| } <span class="kw">else</span> { |
| <span class="ident">Literal::Fallback</span>(<span class="ident">fallback::Literal::character</span>(<span class="ident">t</span>)) |
| } |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">byte_string</span>(<span class="ident">bytes</span>: <span class="kw-2">&</span>[<span class="ident">u8</span>]) -> <span class="ident">Literal</span> { |
| <span class="kw">if</span> <span class="ident">inside_proc_macro</span>() { |
| <span class="ident">Literal::Compiler</span>(<span class="ident">proc_macro::Literal::byte_string</span>(<span class="ident">bytes</span>)) |
| } <span class="kw">else</span> { |
| <span class="ident">Literal::Fallback</span>(<span class="ident">fallback::Literal::byte_string</span>(<span class="ident">bytes</span>)) |
| } |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">span</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">Span</span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="ident">Literal::Compiler</span>(<span class="ident">lit</span>) => <span class="ident">Span::Compiler</span>(<span class="ident">lit</span>.<span class="ident">span</span>()), |
| <span class="ident">Literal::Fallback</span>(<span class="ident">lit</span>) => <span class="ident">Span::Fallback</span>(<span class="ident">lit</span>.<span class="ident">span</span>()), |
| } |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">set_span</span>(<span class="kw-2">&mut</span> <span class="self">self</span>, <span class="ident">span</span>: <span class="ident">Span</span>) { |
| <span class="kw">match</span> (<span class="self">self</span>, <span class="ident">span</span>) { |
| (<span class="ident">Literal::Compiler</span>(<span class="ident">lit</span>), <span class="ident">Span::Compiler</span>(<span class="ident">s</span>)) => <span class="ident">lit</span>.<span class="ident">set_span</span>(<span class="ident">s</span>), |
| (<span class="ident">Literal::Fallback</span>(<span class="ident">lit</span>), <span class="ident">Span::Fallback</span>(<span class="ident">s</span>)) => <span class="ident">lit</span>.<span class="ident">set_span</span>(<span class="ident">s</span>), |
| <span class="kw">_</span> => <span class="ident">mismatch</span>(), |
| } |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">subspan</span><span class="op"><</span><span class="ident">R</span>: <span class="ident">RangeBounds</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span><span class="op">></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">range</span>: <span class="ident">R</span>) -> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Span</span><span class="op">></span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">proc_macro_span</span>)]</span> |
| <span class="ident">Literal::Compiler</span>(<span class="ident">lit</span>) => <span class="ident">lit</span>.<span class="ident">subspan</span>(<span class="ident">range</span>).<span class="ident">map</span>(<span class="ident">Span::Compiler</span>), |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">proc_macro_span</span>))]</span> |
| <span class="ident">Literal::Compiler</span>(<span class="ident">_lit</span>) => <span class="prelude-val">None</span>, |
| <span class="ident">Literal::Fallback</span>(<span class="ident">lit</span>) => <span class="ident">lit</span>.<span class="ident">subspan</span>(<span class="ident">range</span>).<span class="ident">map</span>(<span class="ident">Span::Fallback</span>), |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">unwrap_nightly</span>(<span class="self">self</span>) -> <span class="ident">proc_macro::Literal</span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="ident">Literal::Compiler</span>(<span class="ident">s</span>) => <span class="ident">s</span>, |
| <span class="ident">Literal::Fallback</span>(<span class="kw">_</span>) => <span class="ident">mismatch</span>(), |
| } |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">From</span><span class="op"><</span><span class="ident">fallback::Literal</span><span class="op">></span> <span class="kw">for</span> <span class="ident">Literal</span> { |
| <span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">s</span>: <span class="ident">fallback::Literal</span>) -> <span class="ident">Literal</span> { |
| <span class="ident">Literal::Fallback</span>(<span class="ident">s</span>) |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">FromStr</span> <span class="kw">for</span> <span class="ident">Literal</span> { |
| <span class="kw">type</span> <span class="prelude-val">Err</span> <span class="op">=</span> <span class="ident">LexError</span>; |
| |
| <span class="kw">fn</span> <span class="ident">from_str</span>(<span class="ident">repr</span>: <span class="kw-2">&</span><span class="ident">str</span>) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="self">Self</span>, <span class="ident"><span class="self">Self</span>::Err</span><span class="op">></span> { |
| <span class="kw">if</span> <span class="ident">inside_proc_macro</span>() { |
| <span class="ident">compiler_literal_from_str</span>(<span class="ident">repr</span>).<span class="ident">map</span>(<span class="ident">Literal::Compiler</span>) |
| } <span class="kw">else</span> { |
| <span class="kw">let</span> <span class="ident">literal</span> <span class="op">=</span> <span class="ident">fallback::Literal::from_str</span>(<span class="ident">repr</span>)<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(<span class="ident">Literal::Fallback</span>(<span class="ident">literal</span>)) |
| } |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">compiler_literal_from_str</span>(<span class="ident">repr</span>: <span class="kw-2">&</span><span class="ident">str</span>) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">proc_macro::Literal</span>, <span class="ident">LexError</span><span class="op">></span> { |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">no_literal_from_str</span>))]</span> |
| { |
| <span class="ident">proc_macro::Literal::from_str</span>(<span class="ident">repr</span>).<span class="ident">map_err</span>(<span class="ident">LexError::Compiler</span>) |
| } |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">no_literal_from_str</span>)]</span> |
| { |
| <span class="kw">let</span> <span class="ident">tokens</span> <span class="op">=</span> <span class="ident">proc_macro_parse</span>(<span class="ident">repr</span>)<span class="question-mark">?</span>; |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">iter</span> <span class="op">=</span> <span class="ident">tokens</span>.<span class="ident">into_iter</span>(); |
| <span class="kw">if</span> <span class="kw">let</span> (<span class="prelude-val">Some</span>(<span class="ident">proc_macro::TokenTree::Literal</span>(<span class="ident">literal</span>)), <span class="prelude-val">None</span>) <span class="op">=</span> (<span class="ident">iter</span>.<span class="ident">next</span>(), <span class="ident">iter</span>.<span class="ident">next</span>()) { |
| <span class="kw">if</span> <span class="ident">literal</span>.<span class="ident">to_string</span>().<span class="ident">len</span>() <span class="op">==</span> <span class="ident">repr</span>.<span class="ident">len</span>() { |
| <span class="kw">return</span> <span class="prelude-val">Ok</span>(<span class="ident">literal</span>); |
| } |
| } |
| <span class="prelude-val">Err</span>(<span class="ident">LexError::call_site</span>()) |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">Display</span> <span class="kw">for</span> <span class="ident">Literal</span> { |
| <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&mut</span> <span class="ident">fmt::Formatter</span>) -> <span class="ident">fmt::Result</span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="ident">Literal::Compiler</span>(<span class="ident">t</span>) => <span class="ident">Display::fmt</span>(<span class="ident">t</span>, <span class="ident">f</span>), |
| <span class="ident">Literal::Fallback</span>(<span class="ident">t</span>) => <span class="ident">Display::fmt</span>(<span class="ident">t</span>, <span class="ident">f</span>), |
| } |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">Literal</span> { |
| <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&mut</span> <span class="ident">fmt::Formatter</span>) -> <span class="ident">fmt::Result</span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="ident">Literal::Compiler</span>(<span class="ident">t</span>) => <span class="ident">Debug::fmt</span>(<span class="ident">t</span>, <span class="ident">f</span>), |
| <span class="ident">Literal::Fallback</span>(<span class="ident">t</span>) => <span class="ident">Debug::fmt</span>(<span class="ident">t</span>, <span class="ident">f</span>), |
| } |
| } |
| } |
| </code></pre></div> |
| </section><section id="search" class="content hidden"></section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="proc_macro2" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.60.0-nightly (1bd4fdc94 2022-01-12)" ></div> |
| </body></html> |