mirror of
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synced 2026-04-02 09:20:29 +09:00
60dc96479a
Because our wrapper functions barf if the pointer is nil, even if we don't actually dereference the pointer. Fixes #77779 Change-Id: Ib1b93d9f0fdc771cd884137007508ba2b1da4b7a Reviewed-on: https://go-review.googlesource.com/c/go/+/748660 Reviewed-by: Ian Lance Taylor <iant@golang.org> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com> Reviewed-by: Cherry Mui <cherryyz@google.com> Reviewed-by: Keith Randall <khr@google.com>
46 lines
932 B
Go
46 lines
932 B
Go
// run
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// Copyright 2026 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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import (
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"reflect"
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)
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type Renderer interface {
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Render() error
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}
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type ZeroSize struct{}
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func (ZeroSize) Render() error { return nil }
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type Data struct {
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X, Y, Z int
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}
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// Container is pointer-sized (8 bytes): zero-size embed + one pointer field.
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// This triggers Go 1.26 interface inlining, which produces a nil data pointer
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// for the zero-size field when extracted via reflect.Value.Interface().
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type Container struct {
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ZeroSize
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Data *Data
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}
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func main() {
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render(Container{})
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render(&Container{})
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}
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func render(iface any) {
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if reflect.ValueOf(iface).Kind() == reflect.Ptr {
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_ = reflect.ValueOf(iface).Elem().Field(0).Interface().(Renderer).Render()
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return
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}
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_ = reflect.ValueOf(iface).Field(0).Interface().(Renderer).Render()
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}
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