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https://github.com/golang/go
synced 2024-09-05 16:04:50 +00:00
ecfff58fb8
Add OCALL, OCALLFUNC, OCALLMETH, OCALLINTER, ODYNAMICDOTTYPE transformations to the CALL check switch statement. Fixes #48042 Change-Id: Ied93efd979c5b2c56b72fad26fccfd9f887361d3 Reviewed-on: https://go-review.googlesource.com/c/go/+/345949 Trust: Keith Randall <khr@golang.org> Trust: Dan Scales <danscales@google.com> Reviewed-by: Dan Scales <danscales@google.com>
77 lines
1.3 KiB
Go
77 lines
1.3 KiB
Go
// run -gcflags=-G=3
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// Copyright 2021 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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"fmt"
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"reflect"
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)
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type G[T any] interface {
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g() func()(*T)
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}
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type Foo[T any] struct {
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}
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// OCALL
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func (l *Foo[T]) f1() (*T) {
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return g[T]()()
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}
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// OCALLFUNC
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func (l *Foo[T]) f2() (*T) {
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var f = g[T]
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return f()()
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}
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// OCALLMETH
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func (l *Foo[T]) f3() (*T) {
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return l.g()()
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}
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// OCALLINTER
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func (l *Foo[T]) f4() (*T) {
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var g G[T] = l
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return g.g()()
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}
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// ODYNAMICDOTTYPE
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func (l *Foo[T]) f5() (*T) {
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var x interface{}
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x = g[T]
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return x.(func()func()(*T))()()
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}
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func (l *Foo[T]) g() func() (*T) {
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return func() (*T) {
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t := new(T)
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reflect.ValueOf(t).Elem().SetInt(100)
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return t
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}
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}
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func g[T any]() func() (*T) {
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return func() (*T) {
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t := new(T)
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reflect.ValueOf(t).Elem().SetInt(100)
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return t
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}
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}
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func main() {
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foo := Foo[int]{}
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// Make sure the function conversion is correct
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if n := *(foo.f1()) ; n != 100{
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panic(fmt.Sprintf("%v",n))
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}
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if n := *(foo.f2()) ; n != 100{
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panic(fmt.Sprintf("%v",n))
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}
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if n := *(foo.f3()) ; n != 100{
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panic(fmt.Sprintf("%v",n))
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}
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if n := *(foo.f4()) ; n != 100{
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panic(fmt.Sprintf("%v",n))
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}
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if n := *(foo.f5()) ; n != 100{
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panic(fmt.Sprintf("%v",n))
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}
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} |