| // run -gcflags=-G=3 |
| |
| // 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 |
| |
| type I interface{ foo() int } |
| |
| type myint int |
| |
| func (x myint) foo() int { return int(x) } |
| |
| type myfloat float64 |
| |
| func (x myfloat) foo() int { return int(x) } |
| |
| type myint32 int32 |
| |
| func (x myint32) foo() int { return int(x) } |
| |
| func f[T I](i I) { |
| switch x := i.(type) { |
| case T: |
| println("T", x.foo()) |
| case myint: |
| println("myint", x.foo()) |
| default: |
| println("other", x.foo()) |
| } |
| } |
| func main() { |
| f[myfloat](myint(6)) |
| f[myfloat](myfloat(7)) |
| f[myfloat](myint32(8)) |
| f[myint32](myint32(8)) |
| f[myint32](myfloat(7)) |
| f[myint](myint32(9)) |
| } |
