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rustc_parse: correct span on cast expr with attrs

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This commit is contained in:
Caleb Cartwright 2020-10-09 23:40:27 -05:00
parent 38d911dfc5
commit 7280f6aa41
1 changed files with 16 additions and 6 deletions
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22
compiler/rustc_parse/src/parser/expr.rs
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@ -245,11 +245,7 @@ impl<'a> Parser<'a> {
this.parse_assoc_expr_with(prec + prec_adjustment, LhsExpr::NotYetParsed)
})?;
// Make sure that the span of the parent node is larger than the span of lhs and rhs,
// including the attributes.
let lhs_span =
lhs.attrs.iter().find(|a| a.style == AttrStyle::Outer).map_or(lhs_span, |a| a.span);
let span = lhs_span.to(rhs.span);
let span = self.mk_expr_sp(&lhs, lhs_span, rhs.span);
lhs = match op {
AssocOp::Add
| AssocOp::Subtract
@ -570,7 +566,11 @@ impl<'a> Parser<'a> {
expr_kind: fn(P<Expr>, P<Ty>) -> ExprKind,
) -> PResult<'a, P<Expr>> {
let mk_expr = |this: &mut Self, rhs: P<Ty>| {
this.mk_expr(lhs_span.to(rhs.span), expr_kind(lhs, rhs), AttrVec::new())
this.mk_expr(
this.mk_expr_sp(&lhs, lhs_span, rhs.span),
expr_kind(lhs, rhs),
AttrVec::new(),
)
};
// Save the state of the parser before parsing type normally, in case there is a
@ -2298,4 +2298,14 @@ impl<'a> Parser<'a> {
pub(super) fn mk_expr_err(&self, span: Span) -> P<Expr> {
self.mk_expr(span, ExprKind::Err, AttrVec::new())
}
/// Create expression span ensuring the span of the parent node
/// is larger than the span of lhs and rhs, including the attributes.
fn mk_expr_sp(&self, lhs: &P<Expr>, lhs_span: Span, rhs_span: Span) -> Span {
lhs.attrs
.iter()
.find(|a| a.style == AttrStyle::Outer)
.map_or(lhs_span, |a| a.span)
.to(rhs_span)
}
}