bjoernager/rust
bjoernager/rust
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use hir::Let in hir::Guard

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This commit is contained in:
SparrowLii 2022-05-09 20:35:58 +08:00
parent 4799baa70d
commit 5251a80c0a
13 changed files with 41 additions and 45 deletions
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10
compiler/rustc_ast_lowering/src/expr.rs
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@ -505,8 +505,14 @@ impl<'hir> LoweringContext<'_, 'hir> {
fn lower_arm(&mut self, arm: &Arm) -> hir::Arm<'hir> {
let pat = self.lower_pat(&arm.pat);
let guard = arm.guard.as_ref().map(|cond| {
if let ExprKind::Let(ref pat, ref scrutinee, _) = cond.kind {
hir::Guard::IfLet(self.lower_pat(pat), self.lower_expr(scrutinee))
if let ExprKind::Let(ref pat, ref scrutinee, span) = cond.kind {
hir::Guard::IfLet(self.arena.alloc(hir::Let {
hir_id: self.next_id(),
span: self.lower_span(span),
pat: self.lower_pat(pat),
ty: None,
init: self.lower_expr(scrutinee),
}))
} else {
hir::Guard::If(self.lower_expr(cond))
}