From b0f753e21d6fcaafd0b35dc02fdfe23b14e310d6 Mon Sep 17 00:00:00 2001 From: LemonBoy Date: Sat, 18 Jan 2020 19:58:05 +0100 Subject: Fix edge case in tagName handling of unions Closes #4226 --- src/ir.cpp | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'src/ir.cpp') diff --git a/src/ir.cpp b/src/ir.cpp index ae02ac9cae..ff4b552a9b 100644 --- a/src/ir.cpp +++ b/src/ir.cpp @@ -22354,6 +22354,15 @@ static IrInstruction *ir_analyze_instruction_enum_tag_name(IrAnalyze *ira, IrIns assert(target->value->type->id == ZigTypeIdEnum); + if (target->value->type->data.enumeration.src_field_count == 1 && + !target->value->type->data.enumeration.non_exhaustive) { + TypeEnumField *only_field = &target->value->type->data.enumeration.fields[0]; + ZigValue *array_val = create_const_str_lit(ira->codegen, only_field->name)->data.x_ptr.data.ref.pointee; + IrInstruction *result = ir_const(ira, &instruction->base, nullptr); + init_const_slice(ira->codegen, result->value, array_val, 0, buf_len(only_field->name), true); + return result; + } + if (instr_is_comptime(target)) { if ((err = type_resolve(ira->codegen, target->value->type, ResolveStatusZeroBitsKnown))) return ira->codegen->invalid_instruction; -- cgit v1.2.3