mirror of
https://github.com/golang/go
synced 2024-11-23 17:40:03 -07:00
e24977d231
The next CL will remove the -G flag, effectively hard-coding it to its current default (-G=3). Change-Id: Ib4743b529206928f9f1cca9fdb19989728327831 Reviewed-on: https://go-review.googlesource.com/c/go/+/388534 Reviewed-by: Keith Randall <khr@golang.org> Trust: Matthew Dempsky <mdempsky@google.com> Run-TryBot: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gopher Robot <gobot@golang.org>
76 lines
1.5 KiB
Go
76 lines
1.5 KiB
Go
// run
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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 "fmt"
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type value[T any] struct {
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val T
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}
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func get[T any](v *value[T]) T {
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return v.val
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}
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func set[T any](v *value[T], val T) {
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v.val = val
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}
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func (v *value[T]) set(val T) {
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v.val = val
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}
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func (v *value[T]) get() T {
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return v.val
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}
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func main() {
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var v1 value[int]
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set(&v1, 1)
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if got, want := get(&v1), 1; got != want {
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panic(fmt.Sprintf("get() == %d, want %d", got, want))
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}
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v1.set(2)
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if got, want := v1.get(), 2; got != want {
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panic(fmt.Sprintf("get() == %d, want %d", got, want))
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}
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v1p := new(value[int])
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set(v1p, 3)
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if got, want := get(v1p), 3; got != want {
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panic(fmt.Sprintf("get() == %d, want %d", got, want))
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}
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v1p.set(4)
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if got, want := v1p.get(), 4; got != want {
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panic(fmt.Sprintf("get() == %d, want %d", got, want))
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}
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var v2 value[string]
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set(&v2, "a")
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if got, want := get(&v2), "a"; got != want {
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panic(fmt.Sprintf("get() == %q, want %q", got, want))
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}
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v2.set("b")
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if got, want := get(&v2), "b"; got != want {
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panic(fmt.Sprintf("get() == %q, want %q", got, want))
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}
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v2p := new(value[string])
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set(v2p, "c")
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if got, want := get(v2p), "c"; got != want {
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panic(fmt.Sprintf("get() == %d, want %d", got, want))
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}
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v2p.set("d")
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if got, want := v2p.get(), "d"; got != want {
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panic(fmt.Sprintf("get() == %d, want %d", got, want))
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}
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}
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