modify some and define types for token

include/globals.h

@@ -0,0 +1,30 @@
+#pragma once
+
+typedef enum {
+    LBRACK,
+    RBRACK,
+    LCURLY,
+    RCURLY,
+
+    ID,
+    SEMI,
+    COMMA,
+    ARROW,
+    STAR,
+    COMMENT,
+    NUM,
+
+    RETURN,
+    IF,
+    ELSE,
+
+    STRING_LITERAL,
+
+    ERROR
+} TokenType;
+
+typedef struct {
+    TokenType type;
+    char *data;
+    int line;
+} Token;