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// 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
type P *struct{}
func _() {
// want an error even if the switch is empty
var a struct{ _ func() }
switch a /* ERROR "cannot switch on a" */ {
}
switch a /* ERROR "cannot switch on a" */ {
case a: // no follow-on error here
}
// this is ok because f can be compared to nil
var f func()
switch f {
}
switch f {
case nil:
}
switch (func())(nil) {
case nil:
}
switch (func())(nil) {
case f /* ERRORx `invalid case f in switch on .* \(func can only be compared to nil\)` */ :
}
switch nil /* ERROR "use of untyped nil in switch expression" */ {
}
// this is ok
switch P(nil) {
case P(nil):
}
}