From 9db084f43d6f253f36484b9e3b76ea483917a893 Mon Sep 17 00:00:00 2001
From: Ryan Liptak <squeek502@hotmail.com>
Date: Thu, 2 Feb 2023 00:54:07 -0800
Subject: [PATCH] Add test for optional error set return types

Closes #5820
---
 test/behavior/error.zig | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/test/behavior/error.zig b/test/behavior/error.zig
index b2a6cc5a5052659f3264b80a86551bcb77e81f19..f30290eb918bcd5280e93a9867f6a7b0f2fd6743 100644
--- a/test/behavior/error.zig
+++ b/test/behavior/error.zig
@@ -896,3 +896,18 @@ test "optional error union return type" {
     };
     try expect(1234 == try S.foo().?);
 }
+
+test "optional error set return type" {
+    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
+    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
+
+    const E = error{ A, B };
+    const S = struct {
+        fn foo(return_null: bool) ?E {
+            return if (return_null) null else E.A;
+        }
+    };
+
+    try expect(null == S.foo(true));
+    try expect(E.A == S.foo(false).?);
+}
-- 
2.54.0