// 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"