mirror of
https://github.com/golang/go
synced 2024-11-24 18:50:05 -07:00
e24977d231
The next CL will remove the -G flag, effectively hard-coding it to its current default (-G=3). Change-Id: Ib4743b529206928f9f1cca9fdb19989728327831 Reviewed-on: https://go-review.googlesource.com/c/go/+/388534 Reviewed-by: Keith Randall <khr@golang.org> Trust: Matthew Dempsky <mdempsky@google.com> Run-TryBot: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gopher Robot <gobot@golang.org>
53 lines
901 B
Go
53 lines
901 B
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.
|
|
|
|
// Test wrappers/interfaces for generic type embedding another generic type.
|
|
|
|
package main
|
|
|
|
import "fmt"
|
|
|
|
type A[T any] struct {
|
|
B[T]
|
|
}
|
|
|
|
type B[T any] struct {
|
|
val T
|
|
}
|
|
|
|
func (b *B[T]) get() T {
|
|
return b.val
|
|
}
|
|
|
|
type getter[T any] interface {
|
|
get() T
|
|
}
|
|
|
|
//go:noinline
|
|
func doGet[T any](i getter[T]) T {
|
|
return i.get()
|
|
}
|
|
|
|
//go:noline
|
|
func doGet2[T any](i interface{}) T {
|
|
i2 := i.(getter[T])
|
|
return i2.get()
|
|
}
|
|
|
|
func main() {
|
|
a := A[int]{B: B[int]{3}}
|
|
var i getter[int] = &a
|
|
|
|
if got, want := doGet(i), 3; got != want {
|
|
panic(fmt.Sprintf("got %v, want %v", got, want))
|
|
}
|
|
|
|
as := A[string]{B: B[string]{"abc"}}
|
|
if got, want := doGet2[string](&as), "abc"; got != want {
|
|
panic(fmt.Sprintf("got %v, want %v", got, want))
|
|
}
|
|
}
|