Merge pull request #2084 from bbbradsmith/numerical_constant_errors-int

Numerical constant errors and improvements (integer)

test/err/huge-integer-constant.c

@@ -0,0 +1,7 @@
+/* too big for internal integer representation */
+unsigned long huge = 4294967296;
+
+int main(void)
+{
+    return 0;
+}

test/err/integer-const-overflow.c

@@ -0,0 +1,20 @@
+/* Integer constant overflow warnings. */
+
+/* Warnings as errors. */
+#pragma warn(error,on)
+
+/* Warn on const overflow */
+#pragma warn(const-overflow,on)
+
+unsigned char      a = 256;
+signed char        b = 128;
+unsigned char      c = -129;
+unsigned short int d = 0x00010000;
+unsigned short int e = 0x80000000;
+signed short int   f = 32768L;
+signed short int   g = -32769L;
+
+int main(void)
+{
+    return 0;
+}