go/test/typeparam/pair.go
Matthew Dempsky 5355753009 [dev.typeparams] test/typeparam: gofmt -w
We don't usually reformat the test directory, but all of the files in
test/typeparam are syntactically valid. I suspect the misformattings
here are because developers aren't re-installing gofmt with
-tags=typeparams, not intentionally exercising non-standard
formatting.

Change-Id: I3767d480434c19225568f3c7d656dc8589197183
Reviewed-on: https://go-review.googlesource.com/c/go/+/338093
Trust: Matthew Dempsky <mdempsky@google.com>
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2021-07-28 21:40:40 +00:00

36 lines
753 B
Go

// run -gcflags=-G=3
// Copyright 2021 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
import (
"fmt"
"unsafe"
)
type pair[F1, F2 any] struct {
f1 F1
f2 F2
}
func main() {
p := pair[int32, int64]{1, 2}
if got, want := unsafe.Sizeof(p.f1), uintptr(4); got != want {
panic(fmt.Sprintf("unexpected f1 size == %d, want %d", got, want))
}
if got, want := unsafe.Sizeof(p.f2), uintptr(8); got != want {
panic(fmt.Sprintf("unexpected f2 size == %d, want %d", got, want))
}
type mypair struct {
f1 int32
f2 int64
}
mp := mypair(p)
if mp.f1 != 1 || mp.f2 != 2 {
panic(fmt.Sprintf("mp == %#v, want %#v", mp, mypair{1, 2}))
}
}