// 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. // Converting constants between types must introduce rounding. package main import "fmt" const ( F32 = 0.00999999977648258209228515625 F64 = 0.01000000000000000020816681711721685132943093776702880859375 ) var F = float64(float32(0.01)) func main() { // 0.01 rounded to float32 then to float64 is F32. // 0.01 represented directly in float64 is F64. if F != F32 { panic(fmt.Sprintf("F=%.1000g, want %.1000g", F, F32)) } }