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https://github.com/golang/go
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8f194bf5ff
various bug fixes and tests involving constants. test/const1.go is the major new test case. R=ken OCL=26216 CL=26224
121 lines
2.4 KiB
Go
121 lines
2.4 KiB
Go
// $G $F.go && $L $F.$A && ./$A.out
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// Copyright 2009 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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const (
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c0 = 0;
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cm1 = -1;
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chuge = 1 << 100;
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chuge_1 = chuge - 1;
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c1 = chuge >> 100;
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c3div2 = 3/2;
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c1e3 = 1e3;
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ctrue = true;
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cfalse = !ctrue;
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)
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const (
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f0 = 0.0;
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fm1 = -1.;
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fhuge float64 = 1 << 100;
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fhuge_1 float64 = chuge - 1;
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f1 float64 = chuge >> 100;
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f3div2 = 3./2.;
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f1e3 float64 = 1e3;
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)
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func assert(t bool, s string) {
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if !t {
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panic(s)
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}
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}
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func ints() {
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assert(c0 == 0, "c0");
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assert(c1 == 1, "c1");
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assert(chuge > chuge_1, "chuge");
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assert(chuge_1 + 1 == chuge, "chuge 1");
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assert(chuge + cm1 +1 == chuge, "cm1");
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assert(c3div2 == 1, "3/2");
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assert(c1e3 == 1000, "c1e3 int");
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assert(c1e3 == 1e3, "c1e3 float");
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// verify that all (in range) are assignable as ints
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var i int;
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i = c0;
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assert(i == c0, "i == c0");
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i = cm1;
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assert(i == cm1, "i == cm1");
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i = c1;
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assert(i == c1, "i == c1");
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i = c3div2;
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assert(i == c3div2, "i == c3div2");
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i = c1e3;
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assert(i == c1e3, "i == c1e3");
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// verify that all are assignable as floats
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var f float64;
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f = c0;
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assert(f == c0, "f == c0");
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f = cm1;
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assert(f == cm1, "f == cm1");
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f = chuge;
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assert(f == chuge, "f == chuge");
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f = chuge_1;
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assert(f == chuge_1, "f == chuge_1");
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f = c1;
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assert(f == c1, "f == c1");
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f = c3div2;
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assert(f == c3div2, "f == c3div2");
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f = c1e3;
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assert(f == c1e3, "f == c1e3");
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}
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func floats() {
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assert(f0 == c0, "f0");
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assert(f1 == c1, "f1");
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assert(fhuge == fhuge_1, "fhuge"); // float64 can't distinguish fhuge, fhuge_1.
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assert(fhuge_1 + 1 == fhuge, "fhuge 1");
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assert(fhuge + fm1 +1 == fhuge, "fm1");
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assert(f3div2 == 1.5, "3./2.");
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assert(f1e3 == 1000, "f1e3 int");
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assert(f1e3 == 1.e3, "f1e3 float");
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// verify that all (in range) are assignable as ints
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var i int;
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i = f0;
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assert(i == f0, "i == f0");
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i = fm1;
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assert(i == fm1, "i == fm1");
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// verify that all are assignable as floats
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var f float64;
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f = f0;
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assert(f == f0, "f == f0");
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f = fm1;
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assert(f == fm1, "f == fm1");
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f = fhuge;
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assert(f == fhuge, "f == fhuge");
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f = fhuge_1;
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assert(f == fhuge_1, "f == fhuge_1");
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f = f1;
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assert(f == f1, "f == f1");
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f = f3div2;
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assert(f == f3div2, "f == f3div2");
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f = f1e3;
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assert(f == f1e3, "f == f1e3");
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}
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func main() {
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ints();
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floats();
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assert(ctrue == true, "ctrue == true");
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assert(cfalse == false, "cfalse == false");
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}
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