4004dd1b15
compiler: Temporarily re-export `assert_matches!` to reduce stabilization churn https://github.com/rust-lang/rust/pull/137487 proposes to stabilize `feature(assert_matches)`, while simultaneously moving the `assert_matches!` and `debug_assert_matches!` macros out of the `std::assert_matches` submodule and exporting them directly from the `std` crate root instead. Unfortunately, that moving step would cause a lot of `cfg(bootstrap)` churn and noise in the compiler, because the compiler imports and uses those macros in dozens of places. This PR therefore aims to reduce the overall compiler churn, by temporarily adjusting the compiler to always use `assert_matches!` via a re-export from `rustc_data_structures`. That way, the stabilization itself would only need to add `cfg(bootstrap)` to that single re-export (plus the associated `#![feature(assert_matches)]` attributes), greatly reducing the immediate impact on the compiler. Once `assert_matches!` is stable in the stage0 bootstrap compiler, we can go back and delete the re-export, and adjust the rest of the compiler to import directly from `std` instead. |
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| Cargo.toml | ||
| messages.ftl | ||
| README.md | ||
Please read the rustc-dev-guide chapter on Backend Agnostic Codegen.