https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100252
--- Comment #10 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Proof of concept:
--- a/gcc/cp/semantics.cc
+++ b/gcc/cp/semantics.cc
@@ -3296,6 +3296,14 @@ finish_compound_literal (tree type, tree
compound_literal,
if (TREE_CODE (compound_literal) == CONSTRUCTOR)
TREE_HAS_CONSTRUCTOR (compound_literal) = false;
compound_literal = get_target_expr_sfinae (compound_literal, complain);
+ if (parsing_nsdmi ())
+ {
+ tree obj = TARGET_EXPR_SLOT (compound_literal);
+ tree &ctor = TARGET_EXPR_INITIAL (compound_literal);
+ replace_placeholders (compound_literal, obj);
+ if (TREE_CODE (ctor) == CONSTRUCTOR)
+ CONSTRUCTOR_PLACEHOLDER_BOUNDARY (ctor) = false;
+ }
}
else
/* For e.g. int{42} just make sure it's a prvalue. */
