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f68a0449ed
`parse_tt` needs a way to get from within submatchers make to the enclosing submatchers. Currently it has two distinct mechanisms for this: - `Delimited` submatchers use `MatcherPos::stack` to record stuff about the parent (and further back ancestors). - `Sequence` submatchers use `MatcherPosSequence::parent` to point to the parent matcher position. Having two mechanisms is really confusing, and it took me a long time to understand all this. This commit eliminates `MatcherPos::stack`, and changes `Delimited` submatchers to use the same mechanism as sequence submatchers. That mechanism is also changed a bit: instead of storing the entire parent `MatcherPos`, we now only store the necessary parts from the parent `MatcherPos`. Overall this is a small performance win, with the positives outweighing the negatives, but it's mostly for clarity.
56 lines
1.2 KiB
Rust
56 lines
1.2 KiB
Rust
#![feature(associated_type_bounds)]
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#![feature(associated_type_defaults)]
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#![feature(box_patterns)]
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#![feature(box_syntax)]
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#![feature(crate_visibility_modifier)]
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#![feature(decl_macro)]
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#![feature(if_let_guard)]
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#![feature(let_chains)]
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#![feature(let_else)]
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#![feature(proc_macro_diagnostic)]
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#![feature(proc_macro_internals)]
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#![feature(proc_macro_span)]
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#![feature(try_blocks)]
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#![recursion_limit = "256"]
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#![allow(rustc::potential_query_instability)]
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#[macro_use]
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extern crate rustc_macros;
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extern crate proc_macro as pm;
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mod placeholders;
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mod proc_macro_server;
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pub use mbe::macro_rules::compile_declarative_macro;
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crate use rustc_span::hygiene;
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pub mod base;
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pub mod build;
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#[macro_use]
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pub mod config;
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pub mod expand;
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pub mod module;
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pub mod proc_macro;
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crate mod mbe;
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// HACK(Centril, #64197): These shouldn't really be here.
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// Rather, they should be with their respective modules which are defined in other crates.
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// However, since for now constructing a `ParseSess` sorta requires `config` from this crate,
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// these tests will need to live here in the interim.
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#[cfg(test)]
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mod tests;
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#[cfg(test)]
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mod parse {
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mod tests;
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}
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#[cfg(test)]
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mod tokenstream {
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mod tests;
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}
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#[cfg(test)]
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mod mut_visit {
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mod tests;
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}
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