go/test/typeparam/issue376214.go

// run

// Copyright 2022 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

func add[S ~string | ~[]byte](buf *[]byte, s S) {
	*buf = append(*buf, s...)
}

func main() {
	var buf []byte
	add(&buf, "foo")
	add(&buf, []byte("bar"))
	if string(buf) != "foobar" {
		panic("got " + string(buf))
	}
}
all: avoid use of cmd/compile -G flag in tests 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> 2022-02-28 15:32:19 -07:00			`// run`
cmd/compile: accept string\|[]byte-constrained 2nd argument in append Similarly to what we do for the built-in function `copy`, where we allow a string as 2nd argument to append, also permit a type parameter constrained by string\|[]byte. While at it, change date in the manual.go2 test files so that we don't need to constantly correct it when copying a test case from that file into a proper test file. Fixes #50281. Change-Id: I23fed66736aa07bb3c481fe97313e828425ac448 Reviewed-on: https://go-review.googlesource.com/c/go/+/376214 Trust: Robert Griesemer <gri@golang.org> Reviewed-by: Robert Findley <rfindley@google.com> 2022-01-06 19:02:30 -07:00
			`// Copyright 2022 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`

			`func add[S ~string \| ~[]byte](buf *[]byte, s S) {`
			`buf = append(buf, s...)`
			`}`

			`func main() {`
			`var buf []byte`
			`add(&buf, "foo")`
			`add(&buf, []byte("bar"))`
			`if string(buf) != "foobar" {`
			`panic("got " + string(buf))`
			`}`
			`}`