mirror of https://go.googlesource.com/go
33 lines
1008 B
Go
33 lines
1008 B
Go
// errorcheck
|
|
|
|
// 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.
|
|
|
|
// Verify that large integer constant expressions cause overflow.
|
|
// Does not compile.
|
|
|
|
package main
|
|
|
|
const (
|
|
A int = 1
|
|
B byte; // ERROR "type without expr|expected .=.|missing init expr"
|
|
)
|
|
|
|
const LargeA = 1000000000000000000
|
|
const LargeB = LargeA * LargeA * LargeA
|
|
const LargeC = LargeB * LargeB * LargeB // GC_ERROR "constant multiplication overflow"
|
|
|
|
const AlsoLargeA = LargeA << 400 << 400 >> 400 >> 400 // GC_ERROR "constant shift overflow"
|
|
|
|
// Issue #42732.
|
|
|
|
const a = 1e+500000000
|
|
const b = a * a // ERROR "constant multiplication overflow|not representable"
|
|
const c = b * b
|
|
|
|
const MaxInt512 = (1<<256 - 1) * (1<<256 + 1)
|
|
const _ = MaxInt512 + 1 // ERROR "constant addition overflow"
|
|
const _ = MaxInt512 ^ -1 // ERROR "constant bitwise XOR overflow"
|
|
const _ = ^MaxInt512 // ERROR "constant bitwise complement overflow"
|