1 // Copyright 2022 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 package p 6 7 func _[T interface { 8 int 9 string 10 }](x T) { 11 _ = x /* ERROR "empty type set" */ == x 12 _ = x /* ERROR "empty type set" */ + x 13 <-x /* ERROR "empty type set" */ 14 x <- /* ERROR "empty type set" */ 0 15 close(x /* ERROR "empty type set" */) 16 } 17 18 func _[T interface{ int | []byte }](x T) { 19 _ = x /* ERROR "incomparable types in type set" */ == x 20 } 21