-// errchk $G $D/$F.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 .=."
+ 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"