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Implement AST visitors using a derive macro.

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This commit is contained in:
Camille GILLOT
2025-07-03 22:24:21 +00:00
parent ca9eecda36
commit 3c81faec23
7 changed files with 1219 additions and 1675 deletions
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11
compiler/rustc_macros/src/lib.rs
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@@ -21,6 +21,7 @@ mod symbols;
mod try_from;
mod type_foldable;
mod type_visitable;
mod visitable;
// Reads the rust version (e.g. "1.75.0") from the CFG_RELEASE env var and
// produces a `RustcVersion` literal containing that version (e.g.
@@ -101,6 +102,16 @@ decl_derive!(
/// visited (and its type is not required to implement `TypeVisitable`).
type_visitable::type_visitable_derive
);
decl_derive!(
[Walkable, attributes(visitable)] =>
/// Derives `Walkable` for the annotated `struct` or `enum` (`union` is not supported).
///
/// Each field of the struct or enum variant will be visited in definition order, using the
/// `Walkable` implementation for its type. However, if a field of a struct or an enum
/// variant is annotated with `#[visitable(ignore)]` then that field will not be
/// visited (and its type is not required to implement `Walkable`).
visitable::visitable_derive
);
decl_derive!([Lift, attributes(lift)] => lift::lift_derive);
decl_derive!(
[Diagnostic, attributes(