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fix: Add binding definition for for-expr iterator desugared binding

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This commit is contained in:
Lukas Wirth 2023-06-18 11:41:20 +02:00
parent fcfc6afe05
commit 83d7724629
3 changed files with 42 additions and 35 deletions
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46
crates/hir-def/src/body/lower.rs
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@ -188,7 +188,7 @@ impl ExprCollector<'_> {
param_list.self_param().filter(|_| attr_enabled.next().unwrap_or(false))
{
let ptr = AstPtr::new(&self_param);
let binding_id = self.alloc_binding(
let binding_id: la_arena::Idx<Binding> = self.alloc_binding(
name![self],
BindingAnnotation::new(
self_param.mut_token().is_some() && self_param.amp_token().is_none(),
@ -745,16 +745,14 @@ impl ExprCollector<'_> {
/// }
/// ```
fn collect_for_loop(&mut self, syntax_ptr: AstPtr<ast::Expr>, e: ast::ForExpr) -> ExprId {
let (into_iter_fn, iter_next_fn, option_some, option_none) = 'if_chain: {
if let Some(into_iter_fn) = LangItem::IntoIterIntoIter.path(self.db, self.krate) {
if let Some(iter_next_fn) = LangItem::IteratorNext.path(self.db, self.krate) {
if let Some(option_some) = LangItem::OptionSome.path(self.db, self.krate) {
if let Some(option_none) = LangItem::OptionNone.path(self.db, self.krate) {
break 'if_chain (into_iter_fn, iter_next_fn, option_some, option_none);
}
}
}
}
let Some((into_iter_fn, iter_next_fn, option_some, option_none)) = (|| {
Some((
LangItem::IntoIterIntoIter.path(self.db, self.krate)?,
LangItem::IteratorNext.path(self.db, self.krate)?,
LangItem::OptionSome.path(self.db, self.krate)?,
LangItem::OptionNone.path(self.db, self.krate)?,
))
})() else {
// Some of the needed lang items are missing, so we can't desugar
return self.alloc_expr(Expr::Missing, syntax_ptr);
};
@ -787,8 +785,8 @@ impl ExprCollector<'_> {
}),
};
let iter_name = Name::generate_new_name();
let iter_binding = self.alloc_binding(iter_name.clone(), BindingAnnotation::Mutable);
let iter_expr = self.alloc_expr(Expr::Path(Path::from(iter_name)), syntax_ptr.clone());
let iter_expr =
self.alloc_expr(Expr::Path(Path::from(iter_name.clone())), syntax_ptr.clone());
let iter_expr_mut = self.alloc_expr(
Expr::Ref { expr: iter_expr, rawness: Rawness::Ref, mutability: Mutability::Mut },
syntax_ptr.clone(),
@ -808,7 +806,9 @@ impl ExprCollector<'_> {
);
let loop_outer =
self.alloc_expr(Expr::Loop { body: loop_inner, label }, syntax_ptr.clone());
let iter_binding = self.alloc_binding(iter_name, BindingAnnotation::Mutable);
let iter_pat = self.alloc_pat_desugared(Pat::Bind { id: iter_binding, subpat: None });
self.add_definition_to_binding(iter_binding, iter_pat);
self.alloc_expr(
Expr::Match {
expr: iterator,
@ -830,18 +830,14 @@ impl ExprCollector<'_> {
/// }
/// ```
fn collect_try_operator(&mut self, syntax_ptr: AstPtr<ast::Expr>, e: ast::TryExpr) -> ExprId {
let (try_branch, cf_continue, cf_break, try_from_residual) = 'if_chain: {
if let Some(try_branch) = LangItem::TryTraitBranch.path(self.db, self.krate) {
if let Some(cf_continue) = LangItem::ControlFlowContinue.path(self.db, self.krate) {
if let Some(cf_break) = LangItem::ControlFlowBreak.path(self.db, self.krate) {
if let Some(try_from_residual) =
LangItem::TryTraitFromResidual.path(self.db, self.krate)
{
break 'if_chain (try_branch, cf_continue, cf_break, try_from_residual);
}
}
}
}
let Some((try_branch, cf_continue, cf_break, try_from_residual)) = (|| {
Some((
LangItem::TryTraitBranch.path(self.db, self.krate)?,
LangItem::ControlFlowContinue.path(self.db, self.krate)?,
LangItem::ControlFlowBreak.path(self.db, self.krate)?,
LangItem::TryTraitFromResidual.path(self.db, self.krate)?,
))
})() else {
// Some of the needed lang items are missing, so we can't desugar
return self.alloc_expr(Expr::Missing, syntax_ptr);
};