Add more unit tests for math expression casting fix ups

(taken from #3)

tests/highlevel/math-casts.bi

@@ -1,5 +1,7 @@
 #pragma once
 
+extern "C"
+
 type E as long
 enum
 	ENUMCONST1 = 0
@@ -43,3 +45,12 @@ const B20 = culng(0u - 100u)
 #define B31 culng(B30 - 1)
 #define B32 culng(B31 - 1)
 const B30 = culng(0u - 100u)
+type UINT as ulong
+const C00_MAX_UINT32 = cuint(culng(not 0u))
+const C01_MAX_UINT32 = cuint(culng(not culng(0)))
+const C02_MAX_UINT32 = cuint(not cast(UINT, 0))
+const C03_MAX_UINTPTR = cuint(not 0)
+dim shared C04(0 to cuint(not cast(UINT, 0)) - 1) as uinteger = {cuint(not cast(UINT, 0))}
+declare sub C05(byval param as uinteger = cuint(not cast(UINT, 0)))
+
+end extern

tests/highlevel/math-casts.h

@@ -49,3 +49,11 @@ enum E {
 #define B31 (B30 - 1)
 #define B32 (B31 - 1) // isn't a fwdref itself, but refers to one
 #define B30 (0u - 100u)
+
+typedef unsigned int UINT;
+#define C00_MAX_UINT32 ((size_t)~0u)
+#define C01_MAX_UINT32 ((size_t)~(unsigned int)0)
+#define C02_MAX_UINT32 ((size_t)~(UINT)0)
+#define C03_MAX_UINTPTR ((size_t)~0) // ~0 gives a 32bit -1, which (on a 64bit system) will be sign-extended to 64bit size_t before being converted to unsigned
+static size_t C04[(size_t)~(UINT)0] = {(size_t)~(UINT)0};
+void C05(size_t param = (size_t)~((UINT)0));

tests/highlevel/math-casts.txt

@@ -22,4 +22,4 @@
 [22/23] cygwin-x86_64
 [23/23] dos
 	tests/highlevel/math-casts.h
-emitting: tests/highlevel/math-casts.bi (34 declarations, 0 TODOs)
+emitting: tests/highlevel/math-casts.bi (41 declarations, 0 TODOs)