-// errchk $G -e $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 overflow is detected when using numeric constants.
+// Does not compile.
+
package main
-type I interface {}
+import "unsafe"
+
+type I interface{}
+
const (
// assume all types behave similarly to int8/uint8
- Int8 int8 = 101;
- Minus1 int8 = -1;
- Uint8 uint8 = 102;
- Const = 103;
+ Int8 int8 = 101
+ Minus1 int8 = -1
+ Uint8 uint8 = 102
+ Const = 103
- Float32 float32 = 104.5;
- Float float = 105.5;
- ConstFloat = 106.5;
- Big float64 = 1e300;
+ Float32 float32 = 104.5
+ Float64 float64 = 105.5
+ ConstFloat = 106.5
+ Big float64 = 1e300
- String = "abc";
- Bool = true;
+ String = "abc"
+ Bool = true
)
var (
- a1 = Int8 * 100; // ERROR "overflow"
- a2 = Int8 * -1; // OK
- a3 = Int8 * 1000; // ERROR "overflow"
- a4 = Int8 * int8(1000); // ERROR "overflow"
- a5 = int8(Int8 * 1000); // ERROR "overflow"
- a6 = int8(Int8 * int8(1000)); // ERROR "overflow"
- a7 = Int8 - 2*Int8 - 2*Int8; // ERROR "overflow"
- a8 = Int8 * Const / 100; // ERROR "overflow"
- a9 = Int8 * (Const / 100); // OK
+ a1 = Int8 * 100 // ERROR "overflow|cannot convert"
+ a2 = Int8 * -1 // OK
+ a3 = Int8 * 1000 // ERROR "overflow|cannot convert"
+ a4 = Int8 * int8(1000) // ERROR "overflow|cannot convert"
+ a5 = int8(Int8 * 1000) // ERROR "overflow|cannot convert"
+ a6 = int8(Int8 * int8(1000)) // ERROR "overflow|cannot convert"
+ a7 = Int8 - 2*Int8 - 2*Int8 // ERROR "overflow|cannot convert"
+ a8 = Int8 * Const / 100 // ERROR "overflow|cannot convert"
+ a9 = Int8 * (Const / 100) // OK
- b1 = Uint8 * Uint8; // ERROR "overflow"
- b2 = Uint8 * -1; // ERROR "overflow"
- b3 = Uint8 - Uint8; // OK
- b4 = Uint8 - Uint8 - Uint8; // ERROR "overflow"
- b5 = uint8(^0); // ERROR "overflow"
- b6 = ^uint8(0); // OK
- b7 = uint8(Minus1); // ERROR "overflow"
- b8 = uint8(int8(-1)); // ERROR "overflow"
- b8a = uint8(-1); // ERROR "overflow"
- b9 byte = (1<<10) >> 8; // OK
- b10 byte = (1<<10); // ERROR "overflow"
- b11 byte = (byte(1)<<10) >> 8; // ERROR "overflow"
- b12 byte = 1000; // ERROR "overflow"
- b13 byte = byte(1000); // ERROR "overflow"
- b14 byte = byte(100) * byte(100); // ERROR "overflow"
- b15 byte = byte(100) * 100; // ERROR "overflow"
- b16 byte = byte(0) * 1000; // ERROR "overflow"
- b16a byte = 0 * 1000; // OK
- b17 byte = byte(0) * byte(1000); // ERROR "overflow"
- b18 byte = Uint8/0; // ERROR "division by zero"
+ b1 = Uint8 * Uint8 // ERROR "overflow|cannot convert"
+ b2 = Uint8 * -1 // ERROR "overflow|cannot convert"
+ b3 = Uint8 - Uint8 // OK
+ b4 = Uint8 - Uint8 - Uint8 // ERROR "overflow|cannot convert"
+ b5 = uint8(^0) // ERROR "overflow|cannot convert"
+ b5a = int64(^0) // OK
+ b6 = ^uint8(0) // OK
+ b6a = ^int64(0) // OK
+ b7 = uint8(Minus1) // ERROR "overflow|cannot convert"
+ b8 = uint8(int8(-1)) // ERROR "overflow|cannot convert"
+ b8a = uint8(-1) // ERROR "overflow|cannot convert"
+ b9 byte = (1 << 10) >> 8 // OK
+ b10 byte = (1 << 10) // ERROR "overflow|cannot convert"
+ b11 byte = (byte(1) << 10) >> 8 // ERROR "overflow|cannot convert"
+ b12 byte = 1000 // ERROR "overflow|cannot convert"
+ b13 byte = byte(1000) // ERROR "overflow|cannot convert"
+ b14 byte = byte(100) * byte(100) // ERROR "overflow|cannot convert"
+ b15 byte = byte(100) * 100 // ERROR "overflow|cannot convert"
+ b16 byte = byte(0) * 1000 // ERROR "overflow|cannot convert"
+ b16a byte = 0 * 1000 // OK
+ b17 byte = byte(0) * byte(1000) // ERROR "overflow|cannot convert"
+ b18 byte = Uint8 / 0 // ERROR "division by zero"
- c1 float64 = Big;
- c2 float64 = Big*Big; // ERROR "overflow"
- c3 float64 = float64(Big)*Big; // ERROR "overflow"
- c4 = Big*Big; // ERROR "overflow"
- c5 = Big/0; // ERROR "division by zero"
+ c1 float64 = Big
+ c2 float64 = Big * Big // ERROR "overflow|cannot convert"
+ c3 float64 = float64(Big) * Big // ERROR "overflow|cannot convert"
+ c4 = Big * Big // ERROR "overflow|cannot convert"
+ c5 = Big / 0 // ERROR "division by zero"
+ c6 = 1000 % 1e3 // ERROR "invalid operation|expected integer type"
)
-func f(int);
+func f(int)
func main() {
- f(Int8); // ERROR "convert|wrong type"
- f(Minus1); // ERROR "convert|wrong type"
- f(Uint8); // ERROR "convert|wrong type"
- f(Const); // OK
- f(Float32); // ERROR "convert|wrong type"
- f(Float); // ERROR "convert|wrong type"
- f(ConstFloat); // ERROR "truncate"
- f(ConstFloat - 0.5); // OK
- f(Big); // ERROR "convert|wrong type"
- f(String); // ERROR "convert|wrong type"
- f(Bool); // ERROR "convert|wrong type"
+ f(Int8) // ERROR "convert|wrong type|cannot"
+ f(Minus1) // ERROR "convert|wrong type|cannot"
+ f(Uint8) // ERROR "convert|wrong type|cannot"
+ f(Const) // OK
+ f(Float32) // ERROR "convert|wrong type|cannot"
+ f(Float64) // ERROR "convert|wrong type|cannot"
+ f(ConstFloat) // ERROR "truncate"
+ f(ConstFloat - 0.5) // OK
+ f(Big) // ERROR "convert|wrong type|cannot"
+ f(String) // ERROR "convert|wrong type|cannot|incompatible"
+ f(Bool) // ERROR "convert|wrong type|cannot|incompatible"
}
+
+const ptr = nil // ERROR "const.*nil|not constant"
+const _ = string([]byte(nil)) // ERROR "is not a? ?constant"
+const _ = uintptr(unsafe.Pointer((*int)(nil))) // ERROR "is not a? ?constant"
+const _ = unsafe.Pointer((*int)(nil)) // ERROR "cannot be nil|invalid constant type|is not a constant|not constant"
+const _ = (*int)(nil) // ERROR "cannot be nil|invalid constant type|is not a constant|not constant"