| // run | |
| // Copyright 2021 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 | |
| import ( | |
| "fmt" | |
| "strconv" | |
| ) | |
| func test1[T any](fn func(T) int, v T) int { | |
| fn1 := func() int { | |
| var i interface{} = v | |
| val := fn(i.(T)) | |
| return val | |
| } | |
| return fn1() | |
| } | |
| func main() { | |
| want := 123 | |
| got := test1(func(s string) int { | |
| r, err := strconv.Atoi(s) | |
| if err != nil { | |
| return 0 | |
| } | |
| return r | |
| }, "123") | |
| if got != want { | |
| panic(fmt.Sprintf("got %f, want %f", got, want)) | |
| } | |
| } |