Code cleanup. Converting a number lexeme to a proper integer setup but not done yet. So number tokens don't have a valid value.

src/token.c

@@ -1,11 +1,16 @@
 #include "../includes/token.h"
 
-Token* CreateToken(TokenType type, char* value) {
+Token* CreateToken(char* lexeme, void* value, int lineNumber, TokenType type) {
     Token* token = calloc(1, sizeof(Token));
 
-    if (!token) return NULL;
+    if (!token) { 
+        fprintf(stderr, "Failed to calloc memory for Token. %s.\n", strerror(errno));
+        return NULL;
+    }
 
     token->type = type;
+    token->line = lineNumber;
+    token->lexeme = lexeme;
     token->value = value;
 
     return token;
@@ -14,7 +19,7 @@ Token* CreateToken(TokenType type, char* value) {
 void FreeToken(Token* token) {
     if (!token) return;
 
-    if (token->value) free(token->value);
+    if (token->value && token->type >= STRING) free(token->value);
 
     free(token);
 }