mirror of
https://github.com/golang/go
synced 2024-11-11 23:50:22 -07:00
85de30e72f
Currently an expression like var v = 0 >> 1000 is rejected by gc with a "stupid shift" error, while gotype compiles it successfully. As suggested by gri on the issue tracker, allow an rsh right operand to be any valid uint value. Fixes #11328 Change-Id: I6ccb3b7f842338d91fd26ae37dd4fa279d7fc440 Reviewed-on: https://go-review.googlesource.com/13777 Reviewed-by: Robert Griesemer <gri@golang.org>
133 lines
2.6 KiB
Go
133 lines
2.6 KiB
Go
// run
|
|
|
|
// 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.
|
|
|
|
// Test simple boolean and numeric constants.
|
|
|
|
package main
|
|
|
|
import "os"
|
|
|
|
const (
|
|
c0 = 0
|
|
cm1 = -1
|
|
chuge = 1 << 100
|
|
chuge_1 = chuge - 1
|
|
c1 = chuge >> 100
|
|
c3div2 = 3 / 2
|
|
c1e3 = 1e3
|
|
|
|
rsh1 = 1e100 >> 1000
|
|
rsh2 = 1e302 >> 1000
|
|
|
|
ctrue = true
|
|
cfalse = !ctrue
|
|
)
|
|
|
|
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")
|
|
assert(rsh1 == 0, "rsh1")
|
|
assert(rsh2 == 9, "rsh2")
|
|
|
|
// 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")
|
|
// TODO(gri): exp/ssa/interp constant folding is incorrect.
|
|
if os.Getenv("GOSSAINTERP") == "" {
|
|
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()
|
|
|
|
assert(ctrue == true, "ctrue == true")
|
|
assert(cfalse == false, "cfalse == false")
|
|
}
|