| // run |
| |
| // Copyright 2026 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package main |
| |
| import ( |
| "reflect" |
| ) |
| |
| type Renderer interface { |
| Render() error |
| } |
| |
| type ZeroSize struct{} |
| |
| func (ZeroSize) Render() error { return nil } |
| |
| type Data struct { |
| X, Y, Z int |
| } |
| |
| // Container is pointer-sized (8 bytes): zero-size embed + one pointer field. |
| // This triggers Go 1.26 interface inlining, which produces a nil data pointer |
| // for the zero-size field when extracted via reflect.Value.Interface(). |
| type Container struct { |
| ZeroSize |
| Data *Data |
| } |
| |
| func main() { |
| render(Container{}) |
| render(&Container{}) |
| } |
| |
| func render(iface any) { |
| if reflect.ValueOf(iface).Kind() == reflect.Ptr { |
| _ = reflect.ValueOf(iface).Elem().Field(0).Interface().(Renderer).Render() |
| return |
| } |
| |
| _ = reflect.ValueOf(iface).Field(0).Interface().(Renderer).Render() |
| } |
