go issue47708 源码
golang issue47708 代码
文件路径：/test/typeparam/issue47708.go
// 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
type FooType[T any] interface {
Foo(BarType[T]) string
}
type BarType[T any] interface {
Bar(FooType[T]) string
}
// For now, a lone type parameter is not permitted as RHS in a type declaration (issue #45639).
// type Baz[T any] T
// func (l Baz[T]) Foo(v BarType[T]) string {
// return v.Bar(l)
// }
// type Bob[T any] T
// func (l Bob[T]) Bar(v FooType[T]) string {
// if v,ok := v.(Baz[T]);ok{
// return fmt.Sprintf("%v%v",v,l)
// }
// return ""
// }
func main() {
// For now, a lone type parameter is not permitted as RHS in a type declaration (issue #45639).
// var baz Baz[int] = 123
// var bob Bob[int] = 456
//
// if got, want := baz.Foo(bob), "123456"; got != want {
// panic(fmt.Sprintf("got %s want %s", got, want))
// }
}
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