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support ref-patterns

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This commit is contained in:
Aleksey Kladov 2019-01-13 13:34:57 +03:00
parent 40686722ba
commit 8e554ea5fa
5 changed files with 46 additions and 11 deletions
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12
crates/ra_hir/src/expr.rs
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@ -315,15 +315,20 @@ pub enum Pat {
path: Option<Path>,
args: Vec<PatId>,
},
Ref {
pat: PatId,
mutability: Mutability,
},
}
impl Pat {
pub fn walk_child_pats(&self, f: impl FnMut(PatId)) {
pub fn walk_child_pats(&self, mut f: impl FnMut(PatId)) {
match self {
Pat::Missing | Pat::Bind { .. } => {}
Pat::TupleStruct { args, .. } => {
args.iter().map(|pat| *pat).for_each(f);
}
Pat::Ref { pat, .. } => f(*pat),
}
}
}
@ -684,6 +689,11 @@ impl ExprCollector {
let args = p.args().map(|p| self.collect_pat(p)).collect();
self.alloc_pat(Pat::TupleStruct { path, args }, syntax_ptr)
}
ast::PatKind::RefPat(p) => {
let pat = self.collect_pat_opt(p.pat());
let mutability = Mutability::from_mutable(p.is_mut());
self.alloc_pat(Pat::Ref { pat, mutability }, syntax_ptr)
}
_ => {
// TODO
self.alloc_pat(Pat::Missing, syntax_ptr)