https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124487
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
--- gcc/cp/mangle.cc.jj 2026-03-09 10:05:44.653968731 +0100
+++ gcc/cp/mangle.cc 2026-03-13 16:15:44.546198337 +0100
@@ -2744,9 +2744,9 @@ write_type (tree type)
break;
case PACK_INDEX_TYPE:
- /* TODO Mangle pack indexing
- <https://github.com/itanium-cxx-abi/cxx-abi/issues/175>. */
- sorry ("mangling type pack index");
+ write_string ("Dy");
+ write_type (PACK_INDEX_PACK (type));
+ write_expression (PACK_INDEX_INDEX (type));
break;
case LANG_TYPE:
@@ -3602,6 +3602,13 @@ write_expression (tree expr)
else
goto normal_expr;
}
+ else if (code == PACK_INDEX_EXPR)
+ {
+ /* sy rather than sysp. */
+ write_string ("sy");
+ write_expression (PACK_EXPANSION_PATTERN (TREE_OPERAND (expr, 0)));
+ write_expression (TREE_OPERAND (expr, 1));
+ }
else if (TREE_CODE (expr) == ALIGNOF_EXPR)
{
if (!ALIGNOF_EXPR_STD_P (expr))
+ demangler + testsuite? The baz case doesn't work (but it doesn't work in the
2025-ish clang patch either. And clang trunk still doesn't have it.
