blob: dd66e9648b56326f364b4ade15b459a506a5bb9d [file] [log] [blame]
// Copyright 2020 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 p
func _[T any](x interface{}){
switch x.(type) {
case T: // ok to use a type parameter
case int:
}
switch x.(type) {
case T:
case T /* ERROR duplicate case */ :
}
}
type constraint interface {
~int
}
func _[T constraint](x interface{}){
switch x.(type) {
case T: // ok to use a type parameter even if type list contains int
case int:
}
}
func _(x constraint /* ERROR contains type constraints */ ) {
switch x.(type) { // no need to report another error
}
}