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Give spans their parent item during lowering.

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We only do this operation when incremental compilation is enabled. This
avoids pessimizing the span handling for non-incremental compilation.
This commit is contained in:
Camille GILLOT
2021-04-18 21:28:23 +02:00
parent 6f782c4e11
commit f84856cbb0
3 changed files with 11 additions and 3 deletions
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3
compiler/rustc_ast_lowering/src/expr.rs
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@@ -422,7 +422,8 @@ impl<'hir> LoweringContext<'_, 'hir> {
let if_kind = hir::ExprKind::If(new_cond, self.arena.alloc(then), Some(else_expr));
let if_expr = self.expr(span, if_kind, ThinVec::new());
let block = self.block_expr(self.arena.alloc(if_expr));
hir::ExprKind::Loop(block, opt_label, hir::LoopSource::While, span.with_hi(cond.span.hi()))
let span = self.lower_span(span.with_hi(cond.span.hi()));
hir::ExprKind::Loop(block, opt_label, hir::LoopSource::While, span)
}
/// Desugar `try { <stmts>; <expr> }` into `{ <stmts>; ::std::ops::Try::from_output(<expr>) }`,