make 6g constants behave as ken proposes. (i hope.)
various bug fixes and tests involving constants.
test/const1.go is the major new test case.
R=ken
OCL=26216
CL=26224
diff --git a/test/const1.go b/test/const1.go
new file mode 100644
index 0000000..09125a1
--- /dev/null
+++ b/test/const1.go
@@ -0,0 +1,79 @@
+// errchk $G -e $F.go
+
+// 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.
+
+package main
+
+type I interface {}
+const (
+ // assume all types behave similarly to int8/uint8
+ 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;
+
+ String = "abc";
+ Bool = true;
+)
+
+var (
+ a1 = Int8 * 100; // ERROR "overflows"
+ a2 = Int8 * -1; // OK
+ a3 = Int8 * 1000; // ERROR "overflows"
+ a4 = Int8 * int8(1000); // ERROR "overflows"
+ a5 = int8(Int8 * 1000); // ERROR "overflows"
+ a6 = int8(Int8 * int8(1000)); // ERROR "overflows"
+ a7 = Int8 - 2*Int8 - 2*Int8; // ERROR "overflows"
+ a8 = Int8 * Const / 100; // ERROR "overflows"
+ a9 = Int8 * (Const / 100); // OK
+
+ b1 = Uint8 * Uint8; // ERROR "overflows"
+ b2 = Uint8 * -1; // ERROR "overflows"
+ b3 = Uint8 - Uint8; // OK
+ b4 = Uint8 - Uint8 - Uint8; // ERROR "overflows"
+ b5 = uint8(^0); // ERROR "overflows"
+ b6 = ^uint8(0); // ERROR "overflows"
+ b7 = uint8(Minus1); // ERROR "overflows"
+ b8 = uint8(int8(-1)); // ERROR "overflows"
+ b8a = uint8(-1); // ERROR "overflows"
+ b9 byte = (1<<10) >> 8; // OK
+ b10 byte = (1<<10); // ERROR "overflows"
+ b11 byte = (byte(1)<<10) >> 8; // ERROR "overflows"
+ b12 byte = 1000; // ERROR "overflows"
+ b13 byte = byte(1000); // ERROR "overflows"
+ b14 byte = byte(100) * byte(100); // ERROR "overflows"
+ b15 byte = byte(100) * 100; // ERROR "overflows"
+ b16 byte = byte(0) * 1000; // ERROR "overflows"
+ b16a byte = 0 * 1000; // OK
+ b17 byte = byte(0) * byte(1000); // ERROR "overflows"
+ b18 byte = Uint8/0; // ERROR "division by zero"
+
+ c1 float64 = Big;
+ c2 float64 = Big*Big; // ERROR "overflows"
+ c3 float64 = float64(Big)*Big; // ERROR "overflows"
+ c4 = Big*Big; // ERROR "overflows"
+ c5 = Big/0; // ERROR "division by zero"
+)
+
+func f(int);
+
+func main() {
+ f(Int8); // ERROR "convert"
+ f(Minus1); // ERROR "convert"
+ f(Uint8); // ERROR "convert"
+ f(Const); // OK
+ f(Float32); // ERROR "convert"
+ f(Float); // ERROR "convert"
+ f(ConstFloat); // ERROR "truncate"
+ f(ConstFloat - 0.5); // OK
+ f(Big); // ERROR "convert"
+ f(String); // ERROR "convert"
+ f(Bool); // ERROR "convert"
+}
