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Source file test/fixedbugs/bug434.go

Documentation: test/fixedbugs

  // 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)
  	}
  }
  

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