mirror of
https://github.com/golang/go
synced 2024-11-25 06:17:58 -07:00
115 lines
2.3 KiB
Go
115 lines
2.3 KiB
Go
// $G $F.go && $L $F.$A && ./$A.out
|
|
|
|
// Copyright 2009 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.
|
|
|
|
package main
|
|
|
|
const (
|
|
c0 = 0;
|
|
cm1 = -1;
|
|
chuge = 1 << 100;
|
|
chuge_1 = chuge - 1;
|
|
c1 = chuge >> 100;
|
|
c3div2 = 3/2;
|
|
c1e3 = 1e3;
|
|
)
|
|
|
|
const (
|
|
f0 = 0.0;
|
|
fm1 = -1.;
|
|
fhuge float64 = 1 << 100;
|
|
fhuge_1 float64 = chuge - 1;
|
|
f1 float64 = chuge >> 100;
|
|
f3div2 = 3./2.;
|
|
f1e3 float64 = 1e3;
|
|
)
|
|
|
|
func assert(t bool, s string) {
|
|
if !t {
|
|
panic(s)
|
|
}
|
|
}
|
|
|
|
func ints() {
|
|
assert(c0 == 0, "c0");
|
|
assert(c1 == 1, "c1");
|
|
assert(chuge > chuge_1, "chuge");
|
|
assert(chuge_1 + 1 == chuge, "chuge 1");
|
|
assert(chuge + cm1 +1 == chuge, "cm1");
|
|
assert(c3div2 == 1, "3/2");
|
|
assert(c1e3 == 1000, "c1e3 int");
|
|
assert(c1e3 == 1e3, "c1e3 float");
|
|
|
|
// verify that all (in range) are assignable as ints
|
|
var i int;
|
|
i = c0;
|
|
assert(i == c0, "i == c0");
|
|
i = cm1;
|
|
assert(i == cm1, "i == cm1");
|
|
i = c1;
|
|
assert(i == c1, "i == c1");
|
|
i = c3div2;
|
|
assert(i == c3div2, "i == c3div2");
|
|
i = c1e3;
|
|
assert(i == c1e3, "i == c1e3");
|
|
|
|
// verify that all are assignable as floats
|
|
var f float64;
|
|
f = c0;
|
|
assert(f == c0, "f == c0");
|
|
f = cm1;
|
|
assert(f == cm1, "f == cm1");
|
|
f = chuge;
|
|
assert(f == chuge, "f == chuge");
|
|
f = chuge_1;
|
|
assert(f == chuge_1, "f == chuge_1");
|
|
f = c1;
|
|
assert(f == c1, "f == c1");
|
|
f = c3div2;
|
|
assert(f == c3div2, "f == c3div2");
|
|
f = c1e3;
|
|
assert(f == c1e3, "f == c1e3");
|
|
}
|
|
|
|
func floats() {
|
|
assert(f0 == c0, "f0");
|
|
assert(f1 == c1, "f1");
|
|
assert(fhuge == fhuge_1, "fhuge"); // float64 can't distinguish fhuge, fhuge_1.
|
|
assert(fhuge_1 + 1 == fhuge, "fhuge 1");
|
|
assert(fhuge + fm1 +1 == fhuge, "fm1");
|
|
assert(f3div2 == 1.5, "3./2.");
|
|
assert(f1e3 == 1000, "f1e3 int");
|
|
assert(f1e3 == 1.e3, "f1e3 float");
|
|
|
|
// verify that all (in range) are assignable as ints
|
|
var i int;
|
|
i = f0;
|
|
assert(i == f0, "i == f0");
|
|
i = fm1;
|
|
assert(i == fm1, "i == fm1");
|
|
|
|
// verify that all are assignable as floats
|
|
var f float64;
|
|
f = f0;
|
|
assert(f == f0, "f == f0");
|
|
f = fm1;
|
|
assert(f == fm1, "f == fm1");
|
|
f = fhuge;
|
|
assert(f == fhuge, "f == fhuge");
|
|
f = fhuge_1;
|
|
assert(f == fhuge_1, "f == fhuge_1");
|
|
f = f1;
|
|
assert(f == f1, "f == f1");
|
|
f = f3div2;
|
|
assert(f == f3div2, "f == f3div2");
|
|
f = f1e3;
|
|
assert(f == f1e3, "f == f1e3");
|
|
}
|
|
|
|
func main() {
|
|
ints();
|
|
floats();
|
|
}
|