bjoernager/rust
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Plumb awaitness of for loops

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This commit is contained in:
Eric Holk 2023-12-08 14:51:50 -08:00
parent bf9229a2e3
commit 27d6539a46
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GPG key ID: 8EA6B43ED4CE0911
26 changed files with 137 additions and 53 deletions
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9
compiler/rustc_ast_lowering/src/expr.rs
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@ -56,12 +56,12 @@ impl<'hir> LoweringContext<'_, 'hir> {
return ex;
}
// Desugar `ExprForLoop`
// from: `[opt_ident]: for <pat> in <head> <body>`
// from: `[opt_ident]: for await? <pat> in <iter> <body>`
//
// This also needs special handling because the HirId of the returned `hir::Expr` will not
// correspond to the `e.id`, so `lower_expr_for` handles attribute lowering itself.
ExprKind::ForLoop(pat, head, body, opt_label) => {
return self.lower_expr_for(e, pat, head, body, *opt_label);
ExprKind::ForLoop { pat, iter, body, label, kind } => {
return self.lower_expr_for(e, pat, iter, body, *label, *kind);
}
_ => (),
}
@ -337,7 +337,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
),
ExprKind::Try(sub_expr) => self.lower_expr_try(e.span, sub_expr),
ExprKind::Paren(_) | ExprKind::ForLoop(..) => {
ExprKind::Paren(_) | ExprKind::ForLoop{..} => {
unreachable!("already handled")
}
@ -1673,6 +1673,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
head: &Expr,
body: &Block,
opt_label: Option<Label>,
_loop_kind: ForLoopKind,
) -> hir::Expr<'hir> {
let head = self.lower_expr_mut(head);
let pat = self.lower_pat(pat);