mirror of
https://github.com/golang/go
synced 2024-11-22 19:44:57 -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>
51 lines
855 B
Go
51 lines
855 B
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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type I interface {
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foo() int
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}
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// There should be one instantiation of f for both squarer and doubler.
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// Similarly, there should be one instantiation of f for both *incrementer and *decrementer.
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func f[T I](x T) int {
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return x.foo()
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}
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type squarer int
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func (x squarer) foo() int {
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return int(x*x)
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}
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type doubler int
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func (x doubler) foo() int {
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return int(2*x)
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}
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type incrementer int16
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func (x *incrementer) foo() int {
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return int(*x+1)
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}
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type decrementer int32
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func (x *decrementer) foo() int{
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return int(*x-1)
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}
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func main() {
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println(f(squarer(5)))
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println(f(doubler(5)))
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var i incrementer = 5
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println(f(&i))
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var d decrementer = 5
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println(f(&d))
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}
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