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d37d76af43
Fixes #14164. Change-Id: Ib1d1d29674c99cf88e0ae12724823a31f5dbb95c Reviewed-on: https://go-review.googlesource.com/19087 Run-TryBot: Robert Griesemer <gri@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Russ Cox <rsc@golang.org>
48 lines
1.1 KiB
Go
48 lines
1.1 KiB
Go
// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package a
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// F is an exported function, small enough to be inlined.
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// It defines a local interface with an unexported method
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// f, which will appear with a package-qualified method
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// name in the export data.
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func F(x interface{}) bool {
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_, ok := x.(interface {
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f()
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})
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return ok
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}
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// Like F but with the unexported interface method f
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// defined via an embedded interface t. The compiler
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// always flattens embedded interfaces so there should
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// be no difference between F and G. Alas, currently
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// G is not inlineable (at least via export data), so
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// the issue is moot, here.
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func G(x interface{}) bool {
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type t0 interface {
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f()
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}
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_, ok := x.(interface {
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t0
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})
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return ok
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}
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// Like G but now the embedded interface is declared
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// at package level. This function is inlineable via
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// export data. The export data representation is like
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// for F.
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func H(x interface{}) bool {
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_, ok := x.(interface {
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t1
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})
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return ok
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}
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type t1 interface {
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f()
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}
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