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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>
33 lines
635 B
Go
33 lines
635 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 "fmt"
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func fact[T interface { ~int | ~int64 | ~float64 }](n T) T {
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if n == 1 {
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return 1
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}
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return n * fact(n - 1)
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}
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func main() {
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const want = 120
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if got := fact(5); got != want {
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panic(fmt.Sprintf("got %d, want %d", got, want))
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}
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if got := fact[int64](5); got != want {
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panic(fmt.Sprintf("got %d, want %d", got, want))
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}
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if got := fact(5.0); got != want {
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panic(fmt.Sprintf("got %f, want %f", got, want))
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}
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}
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