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stabilize slice_patterns

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This commit is contained in:
Mazdak Farrokhzad 2019-12-30 00:16:16 +01:00
parent 35b5157db5
commit c41443a2b7
3 changed files with 2 additions and 24 deletions
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21
src/librustc_ast_passes/feature_gate.rs
View File

@ -470,29 +470,8 @@ impl<'a> Visitor<'a> for PostExpansionVisitor<'a> {
visit::walk_expr(self, e)
}
fn visit_arm(&mut self, arm: &'a ast::Arm) {
visit::walk_arm(self, arm)
}
fn visit_pat(&mut self, pattern: &'a ast::Pat) {
match &pattern.kind {
PatKind::Slice(pats) => {
for pat in &*pats {
let span = pat.span;
let inner_pat = match &pat.kind {
PatKind::Ident(.., Some(pat)) => pat,
_ => pat,
};
if inner_pat.is_rest() {
gate_feature_post!(
&self,
slice_patterns,
span,
"subslice patterns are unstable"
);
}
}
}
PatKind::Box(..) => {
gate_feature_post!(
&self,

2
src/librustc_feature/accepted.rs
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@ -257,6 +257,8 @@ declare_features! (
/// Allows relaxing the coherence rules such that
/// `impl<T> ForeignTrait<LocalType> for ForeignType<T>` is permitted.
(accepted, re_rebalance_coherence, "1.41.0", Some(55437), None),
/// Allows using subslice patterns, `[a, .., b]` and `[a, xs @ .., b]`.
(accepted, slice_patterns, "1.42.0", Some(62254), None),
// -------------------------------------------------------------------------
// feature-group-end: accepted features

3
src/librustc_feature/active.rs
View File

@ -262,9 +262,6 @@ declare_features! (
/// Allows using non lexical lifetimes (RFC 2094).
(active, nll, "1.0.0", Some(43234), None),
/// Allows using slice patterns.
(active, slice_patterns, "1.0.0", Some(62254), None),
/// Allows the definition of `const` functions with some advanced features.
(active, const_fn, "1.2.0", Some(57563), None),