| // 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 |
| |
| import "reflect" |
| |
| func f[T any](i interface{}) { |
| switch x := i.(type) { |
| case T: |
| println("T", x) |
| case int: |
| println("int", x) |
| case int32, int16: |
| println("int32/int16", reflect.ValueOf(x).Int()) |
| case struct{ a, b T }: |
| println("struct{T,T}", x.a, x.b) |
| default: |
| println("other", reflect.ValueOf(x).Int()) |
| } |
| } |
| func main() { |
| f[float64](float64(6)) |
| f[float64](int(7)) |
| f[float64](int32(8)) |
| f[float64](struct{ a, b float64 }{a: 1, b: 2}) |
| f[float64](int8(9)) |
| f[int32](int32(7)) |
| f[int](int32(7)) |
| } |
