mirror of
https://github.com/golang/go
synced 2024-11-18 13:34:41 -07:00
6f5590edf6
runtime.getitab need filled fun[0] to identify whether implemented the interface. Fixes #51700 Fixes #52228 Change-Id: I0173b98f4e1b45e3a0183a5b60229d289140d1e6 Reviewed-on: https://go-review.googlesource.com/c/go/+/399058 Reviewed-by: Keith Randall <khr@golang.org> Run-TryBot: Keith Randall <khr@golang.org> Auto-Submit: Keith Randall <khr@golang.org> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@google.com> Reviewed-by: David Chase <drchase@google.com>
31 lines
476 B
Go
31 lines
476 B
Go
// run
|
|
|
|
// 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
|
|
|
|
type SomeInterface interface {
|
|
Whatever()
|
|
}
|
|
|
|
func X[T any]() T {
|
|
var m T
|
|
|
|
// for this example, this block should never run
|
|
if _, ok := any(m).(SomeInterface); ok {
|
|
var dst SomeInterface
|
|
_, _ = dst.(T)
|
|
return dst.(T)
|
|
}
|
|
|
|
return m
|
|
}
|
|
|
|
type holder struct{}
|
|
|
|
func main() {
|
|
X[holder]()
|
|
}
|