mirror of
https://github.com/golang/go
synced 2024-09-04 23:44:16 +00:00
![Matthew Dempsky](/assets/img/avatar_default.png)
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>
51 lines
937 B
Go
51 lines
937 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"
|
|
)
|
|
|
|
func Sum[T interface{ int | float64 }](vec []T) T {
|
|
var sum T
|
|
for _, elt := range vec {
|
|
sum = sum + elt
|
|
}
|
|
return sum
|
|
}
|
|
|
|
func Abs(f float64) float64 {
|
|
if f < 0.0 {
|
|
return -f
|
|
}
|
|
return f
|
|
}
|
|
|
|
func main() {
|
|
vec1 := []int{3, 4}
|
|
vec2 := []float64{5.8, 9.6}
|
|
got := Sum[int](vec1)
|
|
want := vec1[0] + vec1[1]
|
|
if got != want {
|
|
panic(fmt.Sprintf("got %d, want %d", got, want))
|
|
}
|
|
got = Sum(vec1)
|
|
if want != got {
|
|
panic(fmt.Sprintf("got %d, want %d", got, want))
|
|
}
|
|
|
|
fwant := vec2[0] + vec2[1]
|
|
fgot := Sum[float64](vec2)
|
|
if Abs(fgot-fwant) > 1e-10 {
|
|
panic(fmt.Sprintf("got %f, want %f", fgot, fwant))
|
|
}
|
|
fgot = Sum(vec2)
|
|
if Abs(fgot-fwant) > 1e-10 {
|
|
panic(fmt.Sprintf("got %f, want %f", fgot, fwant))
|
|
}
|
|
}
|