#include "symbol_table_t.h"
#include "token_t.h"
-void lexer_next_token(token_t *token);
+extern token_t lexer_token;
+
+void lexer_next_token(void);
/* for debugging */
-void lexer_next_preprocessing_token(token_t *token);
+void lexer_next_preprocessing_token(void);
+
+void init_lexer(void);
+void exit_lexer(void);
+
+void lexer_open_stream(FILE *stream, const char *input_name);
+
+const char *concat_strings(const char *string1, const char *string2);
#endif