add mulitple variable declaration, with null default. add call

src/lexer/lex.l

@@ -108,7 +108,7 @@ int yywrap(void * unused_param) {
 
 .   {
     GET_STATE
-    fprintf(stderr, "%s:%u:%u error: unexpected character '%s'\n", state->path, yylineno, COLUMN_NO+1, yytext);
+    fprintf(stderr, "%s:%zu:%zu error: unexpected character '%s'\n", state->path, state->current_line+1, COLUMN_NO+1, yytext);
     exit(1);
 }
 %%

src/lexer/lexer.c

@@ -13,11 +13,12 @@ void lexer(LexerState state) {
   int token;
   while ((token = yylex(scanner)) != 0) {
     Token *token_struct =
-        create_token(token, yyget_lineno(scanner), state.current_column + 1,
+        create_token(token, state.current_line+1, state.current_column + 1,
                      yyget_text(scanner));
     darray_push(state.tokens, token_struct);
     free(token_struct);
     if (token == TOKEN_NEW_LINE) {
+      state.current_line += 1;
       state.current_column = 0;
     } else {
       state.current_column += yyget_leng(scanner);

src/lexer/lexer.h

@@ -8,7 +8,8 @@
 typedef struct {
   const char *path;
   FILE *file;
-  int current_column;
+  size_t current_line;
+  size_t current_column;
   DArray *tokens;
   // add more fields as needed
 } LexerState;

src/lexer/token.h

@@ -1,6 +1,7 @@
 #ifndef TOKEN_H
 #define TOKEN_H
 
+#include <stddef.h>
 typedef enum {
   TOKEN_STRING = 256,
   TOKEN_NUMBER,
@@ -76,8 +77,8 @@ typedef enum {
 
 typedef struct {
   TokenType type;
-  int line;
-  int column;
+  size_t line;
+  size_t column;
   char *value;
 } Token;