codekingpro/portable-devtools

1// run2 3// Copyright 2021 The Go Authors. All rights reserved.4// Use of this source code is governed by a BSD-style5// license that can be found in the LICENSE file.6 7// Make sure we handle instantiated empty interfaces.8 9package main10 11type E[T any] interface {12}13 14//go:noinline15func f[T any](x E[T]) interface{} {16	return x17}18 19//go:noinline20func g[T any](x interface{}) E[T] {21	return x22}23 24type I[T any] interface {25	foo()26}27 28type myint int29 30func (x myint) foo() {}31 32//go:noinline33func h[T any](x I[T]) interface{ foo() } {34	return x35}36 37//go:noinline38func i[T any](x interface{ foo() }) I[T] {39	return x40}41 42func main() {43	if f[int](1) != 1 {44		println("test 1 failed")45	}46	if f[int](2) != (interface{})(2) {47		println("test 2 failed")48	}49	if g[int](3) != 3 {50		println("test 3 failed")51	}52	if g[int](4) != (E[int])(4) {53		println("test 4 failed")54	}55	if h[int](myint(5)) != myint(5) {56		println("test 5 failed")57	}58	if h[int](myint(6)) != interface{ foo() }(myint(6)) {59		println("test 6 failed")60	}61	if i[int](myint(7)) != myint(7) {62		println("test 7 failed")63	}64	if i[int](myint(8)) != I[int](myint(8)) {65		println("test 8 failed")66	}67}68