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https://github.com/golang/go
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7eeec1f6e4
For type assertions, if either src or dst type has shape, we must convert them to dynamic type assertions. Fixes #53309 Change-Id: Ia3362fa67c011febcbdb5b26f856d081b5c366de Reviewed-on: https://go-review.googlesource.com/c/go/+/411617 Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com> Reviewed-by: Cherry Mui <cherryyz@google.com> Reviewed-by: Keith Randall <khr@golang.org>
43 lines
657 B
Go
43 lines
657 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 TaskInput interface {
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deps() []*taskDefinition
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}
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type Value[T any] interface {
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metaValue
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}
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type metaValue interface {
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TaskInput
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}
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type taskDefinition struct {
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}
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type taskResult struct {
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task *taskDefinition
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}
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func (tr *taskResult) deps() []*taskDefinition {
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return nil
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}
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func use[T any](v Value[T]) {
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_, ok := v.(*taskResult)
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if !ok {
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panic("output must be *taskResult")
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}
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}
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func main() {
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tr := &taskResult{&taskDefinition{}}
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use(Value[string](tr))
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}
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