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Remove #[rustc_box] attr during lowering

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This commit is contained in:
est31 2022-05-25 02:30:55 +02:00
parent 535e28b6c6
commit 0a24b9493b
1 changed files with 6 additions and 3 deletions
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9
compiler/rustc_ast_lowering/src/expr.rs
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@ -42,13 +42,16 @@ impl<'hir> LoweringContext<'_, 'hir> {
ExprKind::Tup(ref elts) => hir::ExprKind::Tup(self.lower_exprs(elts)),
ExprKind::Call(ref f, ref args) => {
if e.attrs.get(0).map_or(false, |a| a.has_name(sym::rustc_box)) {
if let [inner] = &args[..] {
hir::ExprKind::Box(self.lower_expr(&inner))
if let [inner] = &args[..] && e.attrs.len() == 1 {
let kind = hir::ExprKind::Box(self.lower_expr(&inner));
let hir_id = self.lower_node_id(e.id);
return hir::Expr { hir_id, kind, span: self.lower_span(e.span) };
} else {
self.sess
.struct_span_err(
e.span,
"rustc_box requires precisely one argument",
"#[rustc_box] requires precisely one argument \
and no other attributes are allowed",
)
.emit();
hir::ExprKind::Err