void-payloads, multi-pattern arms, and range patterns (match statements)

2026-06-29 19:52:05 +02:00
parent 462632554c
commit c82f070d55
8 changed files with 499 additions and 106 deletions
@@ -211,7 +211,9 @@ lower_compound_expr :: proc(state: ^State, expr_id: hir.Expr_Id) -> ir.Instructi
 	case .Array, .Struct:
 		args := make([]ir.Instruction_Id, len(expr.args), state.allocator)
 		for arg, index in expr.args {
-			args[index] = lower_nested_expr(state, arg)
+			// A void union variant (`T{ variant }`) has no payload operand; leave it
+			// invalid so codegen emits only the tag, not a trapping recovery value.
+			args[index] = lower_nested_expr(state, arg) if arg != hir.INVALID_EXPR else ir.INVALID_INSTRUCTION
 		}
 		return append_instruction(state, ir.Instruction{
 			op=.Aggregate, span=expr.span, type=expr.type, args=args, integer=expr.integer,