Add string and char support

tests/include/tast2.h

@@ -23,6 +23,12 @@ extern "C" {
 #define BOOL true
 #define MATHEXPR (1 + 2/3*20 - 100)
 #define ANDEXPR (100 & 11000)
+#define CASTEXPR (char) 34
+
+#define NULLCHAR '\0'
+#define OCTCHAR '\012'
+#define HEXCHAR '\xFE'
+#define TRICKYSTR "\x4E\034\nfoo\0\'\"\r\v\a\b\e\f\t\\\?bar"
 
 #define ALLSHL (SHL1 | SHL2 | SHL3)
 

tests/tast2.nim

@@ -118,6 +118,12 @@ assert BINEXPR == 5
 assert BOOL == true
 assert MATHEXPR == -99
 assert ANDEXPR == 96
+assert CASTEXPR == 34.chr
+
+assert TRICKYSTR == "N\x1C\nfoo\x00\'\"\c\v\a\b\e\f\t\\\\?bar"
+assert NULLCHAR == '\0'
+assert OCTCHAR == '\n'
+assert HEXCHAR.int == 0xFE
 
 assert SHL1 == (1.uint shl 1)
 assert SHL2 == (1.uint shl 2)