mirror of
https://github.com/golang/go
synced 2024-11-18 02:54:47 -07:00
33 lines
565 B
Go
33 lines
565 B
Go
|
// run
|
||
|
|
|
||
|
|
// Copyright 2012 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.
|
||
|
|
|
||
|
|
// Test that typed and untyped negative zero floating point constants
|
||
|
|
// are treated as equivalent to zero constants.
|
||
|
|
|
||
|
|
package main
|
||
|
|
|
||
|
|
import "math"
|
||
|
|
|
||
|
|
const zero = 0.0
|
||
|
|
|
||
|
|
func main() {
|
||
|
|
x := -zero
|
||
|
|
b := math.Float64bits(x)
|
||
|
|
if b != 0 {
|
||
|
|
panic(b)
|
||
|
|
}
|
||
|
|
x = -float64(zero)
|
||
|
|
b = math.Float64bits(x)
|
||
|
|
if b != 0 {
|
||
|
|
panic(b)
|
||
|
|
}
|
||
|
|
v := x
|
||
|
|
b = math.Float64bits(-v)
|
||
|
|
if b != 0x8000000000000000 {
|
||
|
|
panic(b)
|
||
|
|
}
|
||
|
|
}
|