bjoernager/rust
bjoernager/rust
1
Fork 0
Code Activity

Add barest-bones deref patterns

Browse source 
Co-authored-by: Deadbeef <ent3rm4n@gmail.com>
This commit is contained in:
Nadrieril 2024-03-08 19:17:23 +01:00
parent a128516cf9
commit 120d3570aa
16 changed files with 139 additions and 17 deletions
Download patch file Download diff file Expand all files Collapse all files

10
compiler/rustc_ast_passes/src/feature_gate.rs
View file

@ -413,7 +413,10 @@ impl<'a> Visitor<'a> for PostExpansionVisitor<'a> {
}
}
PatKind::Box(..) => {
gate!(&self, box_patterns, pattern.span, "box pattern syntax is experimental");
if !self.features.deref_patterns {
// Allow box patterns under `deref_patterns`.
gate!(&self, box_patterns, pattern.span, "box pattern syntax is experimental");
}
}
PatKind::Range(_, Some(_), Spanned { node: RangeEnd::Excluded, .. }) => {
gate!(
@ -607,13 +610,16 @@ pub fn check_crate(krate: &ast::Crate, sess: &Session, features: &Features) {
};
}
if !visitor.features.deref_patterns {
// Allow box patterns under `deref_patterns`.
gate_all_legacy_dont_use!(box_patterns, "box pattern syntax is experimental");
}
gate_all_legacy_dont_use!(trait_alias, "trait aliases are experimental");
// Despite being a new feature, `where T: Trait<Assoc(): Sized>`, which is RTN syntax now,
// used to be gated under associated_type_bounds, which are right above, so RTN needs to
// be too.
gate_all_legacy_dont_use!(return_type_notation, "return type notation is experimental");
gate_all_legacy_dont_use!(decl_macro, "`macro` is experimental");
gate_all_legacy_dont_use!(box_patterns, "box pattern syntax is experimental");
gate_all_legacy_dont_use!(
exclusive_range_pattern,
"exclusive range pattern syntax is experimental"