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Reestablish feature gate for RangeFrom in slices

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This commit is contained in:
Jubilee Young 2021-05-27 14:36:45 -07:00
parent 45d9dd69a7
commit 43bad44ff0
6 changed files with 99 additions and 0 deletions
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16
compiler/rustc_ast_passes/src/feature_gate.rs
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@ -540,6 +540,22 @@ impl<'a> Visitor<'a> for PostExpansionVisitor<'a> {
fn visit_pat(&mut self, pattern: &'a ast::Pat) {
match &pattern.kind {
PatKind::Slice(pats) => {
for pat in pats {
let inner_pat = match &pat.kind {
PatKind::Ident(.., Some(pat)) => pat,
_ => pat,
};
if let PatKind::Range(Some(_), None, Spanned { .. }) = inner_pat.kind {
gate_feature_post!(
&self,
half_open_range_patterns,
pat.span,
"`X..` patterns in slices are experimental"
);
}
}
}
PatKind::Box(..) => {
gate_feature_post!(
&self,