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Correct case nil: handling for unions

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gingerBill
2026-03-15 17:24:38 +00:00
parent c51391f8cb
commit 70dd93db8f
1 changed files with 7 additions and 1 deletions
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8
src/llvm_backend_stmt.cpp
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@@ -2137,7 +2137,13 @@ gb_internal void lb_build_type_switch_stmt(lbProcedure *p, AstTypeSwitchStmt *ss
lbValue on_val = {};
if (switch_kind == TypeSwitch_Union) {
Type *ut = base_type(type_deref(parent.type));
on_val = lb_const_union_tag(m, ut, case_type);
if (is_type_untyped_nil(case_type)) {
GB_ASSERT(type_has_nil(ut));
saw_nil = true;
on_val = lb_const_int(m, union_tag_type(ut), 0);
} else {
on_val = lb_const_union_tag(m, ut, case_type);
}
} else if (switch_kind == TypeSwitch_Any) {
if (is_type_untyped_nil(case_type)) {