mirror of
https://github.com/golang/go
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370ff5ff96
Did a mix of tilde and non-tilde usage. Tilde notation is not quite fully functional, so no tests are currently trying to distinguish (fail/not fail) based on tilde usage. Change-Id: Ib50cec2fc0684f9d9f3561c889fd44c7a7af458c Reviewed-on: https://go-review.googlesource.com/c/go/+/324572 Trust: Dan Scales <danscales@google.com> Trust: Robert Griesemer <gri@golang.org> Run-TryBot: Dan Scales <danscales@google.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Robert Griesemer <gri@golang.org>
51 lines
941 B
Go
51 lines
941 B
Go
// run -gcflags=-G=3
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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 (
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"fmt"
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)
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func Sum[T interface{ int | float64 }](vec []T) T {
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var sum T
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for _, elt := range vec {
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sum = sum + elt
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}
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return sum
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}
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func Abs(f float64) float64 {
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if f < 0.0 {
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return -f
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}
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return f
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}
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func main() {
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vec1 := []int{3, 4}
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vec2 := []float64{5.8, 9.6}
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got := Sum[int](vec1)
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want := vec1[0] + vec1[1]
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if got != want {
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panic(fmt.Sprintf("got %d, want %d", got, want))
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}
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got = Sum(vec1)
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if want != got {
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panic(fmt.Sprintf("got %d, want %d", got, want))
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}
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fwant := vec2[0] + vec2[1]
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fgot := Sum[float64](vec2)
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if Abs(fgot - fwant) > 1e-10 {
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panic(fmt.Sprintf("got %f, want %f", fgot, fwant))
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}
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fgot = Sum(vec2)
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if Abs(fgot - fwant) > 1e-10 {
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panic(fmt.Sprintf("got %f, want %f", fgot, fwant))
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}
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}
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