1// Copyright 2016 The Go Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style 3// license that can be found in the LICENSE file. 4 5package a 6 7// F is an exported function, small enough to be inlined. 8// It defines a local interface with an unexported method 9// f, which will appear with a package-qualified method 10// name in the export data. 11func F(x interface{}) bool { 12 _, ok := x.(interface { 13 f() 14 }) 15 return ok 16} 17 18// Like F but with the unexported interface method f 19// defined via an embedded interface t. The compiler 20// always flattens embedded interfaces so there should 21// be no difference between F and G. Alas, currently 22// G is not inlineable (at least via export data), so 23// the issue is moot, here. 24func G(x interface{}) bool { 25 type t0 interface { 26 f() 27 } 28 _, ok := x.(interface { 29 t0 30 }) 31 return ok 32} 33 34// Like G but now the embedded interface is declared 35// at package level. This function is inlineable via 36// export data. The export data representation is like 37// for F. 38func H(x interface{}) bool { 39 _, ok := x.(interface { 40 t1 41 }) 42 return ok 43} 44 45type t1 interface { 46 f() 47} 48