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https://github.com/golang/go
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6f5590edf6
runtime.getitab need filled fun[0] to identify whether implemented the interface. Fixes #51700 Fixes #52228 Change-Id: I0173b98f4e1b45e3a0183a5b60229d289140d1e6 Reviewed-on: https://go-review.googlesource.com/c/go/+/399058 Reviewed-by: Keith Randall <khr@golang.org> Run-TryBot: Keith Randall <khr@golang.org> Auto-Submit: Keith Randall <khr@golang.org> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@google.com> Reviewed-by: David Chase <drchase@google.com>
31 lines
476 B
Go
31 lines
476 B
Go
// run
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// Copyright 2022 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 main
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type SomeInterface interface {
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Whatever()
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}
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func X[T any]() T {
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var m T
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// for this example, this block should never run
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if _, ok := any(m).(SomeInterface); ok {
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var dst SomeInterface
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_, _ = dst.(T)
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return dst.(T)
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}
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return m
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}
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type holder struct{}
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func main() {
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X[holder]()
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}
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