go source for verification 2026-05-22

test/typeparam/issue51250a.dir/a.go

@@ -0,0 +1,9 @@
+// Copyright 2022 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package a
+
+type G[T any] struct {
+	x T
+}

test/typeparam/issue51250a.dir/b.go

@@ -0,0 +1,24 @@
+// Copyright 2022 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package b
+
+import "./a"
+
+type T struct { a int }
+
+var I interface{} = a.G[T]{}
+
+//go:noinline
+func F(x interface{}) {
+	switch x.(type) {
+	case a.G[T]:
+	case int:
+		panic("bad")
+	case float64:
+		panic("bad")
+	default:
+		panic("bad")
+	}
+}

test/typeparam/issue51250a.dir/main.go

@@ -0,0 +1,24 @@
+// Copyright 2022 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+import (
+	"./a"
+	"./b"
+)
+
+func main() {
+	switch b.I.(type) {
+	case a.G[b.T]:
+	case int:
+		panic("bad")
+	case float64:
+		panic("bad")
+	default:
+		panic("bad")
+	}
+
+	b.F(a.G[b.T]{})
+}