// 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 ( "fmt" ) type AddType interface { type int, int64, string } // _Add can add numbers or strings func _Add[T AddType](a, b T) T { return a + b } func main() { if got, want := _Add(5, 3), 8; got != want { panic(fmt.Sprintf("got %d, want %d", got, want)) } if got, want := _Add("ab", "cd"), "abcd"; got != want { panic(fmt.Sprintf("got %d, want %d", got, want)) } }