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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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