Created the list structure for the tokens to be stored and some helper functions.

scanner.h

@@ -1,6 +1,8 @@
 #ifndef SCANNER_H
 #define SCANNER_H
 
+#define DEFAULT_TOKENLIST_SIZE 32
+
 typedef enum {
     //Single-character tokens
     LParen, RParen,
@@ -27,6 +29,19 @@ typedef enum {
     EndOF
 } TokenType;
 
-void ScanTokens(const char*);
+typedef struct {
+    TokenType type;
+    char* lexeme;
+    int line;
+} Token;
+
+typedef struct {
+    Token** tokens;
+    int capacity;
+    int size;
+} TokenList;
+
+TokenList* ScanTokens(const char*);
+void DestroyTokenList(TokenList*);
 
 #endif