bjoernager/rust
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Implement macro-based deref!() syntax for deref patterns

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Stop using `box PAT` syntax for deref patterns, as it's misleading and
also causes their semantics being tangled up.
This commit is contained in:
Michael Goulet 2024-03-20 16:53:50 -04:00
parent 2627e9f301
commit 2d633317f3
31 changed files with 123 additions and 35 deletions
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7
compiler/rustc_ast/src/ast.rs
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@ -621,7 +621,9 @@ impl Pat {
| PatKind::Or(s) => s.iter().for_each(|p| p.walk(it)),
// Trivial wrappers over inner patterns.
PatKind::Box(s) | PatKind::Ref(s, _) | PatKind::Paren(s) => s.walk(it),
PatKind::Box(s) | PatKind::Deref(s) | PatKind::Ref(s, _) | PatKind::Paren(s) => {
s.walk(it)
}
// These patterns do not contain subpatterns, skip.
PatKind::Wild
@ -792,6 +794,9 @@ pub enum PatKind {
/// A `box` pattern.
Box(P<Pat>),
/// A `deref` pattern (currently `deref!()` macro-based syntax).
Deref(P<Pat>),
/// A reference pattern (e.g., `&mut (a, b)`).
Ref(P<Pat>, Mutability),