File: issue52228.go

package info (click to toggle)
golang-1.22 1.22.3-1
  • links: PTS, VCS
  • area: main
  • in suites: experimental
  • size: 151,816 kB
  • sloc: asm: 126,284; ansic: 6,945; sh: 2,265; javascript: 1,559; perl: 1,041; python: 366; makefile: 88; cpp: 39; f90: 8; awk: 7; objc: 4
file content (30 lines) | stat: -rw-r--r-- 476 bytes parent folder | download | duplicates (25)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
// 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]()
}