/* Current position. */
int lex_get_first_line_number (const struct lexer *, int n);
int lex_get_last_line_number (const struct lexer *, int n);
int lex_get_first_column (const struct lexer *, int n);
int lex_get_last_column (const struct lexer *, int n);
const char *lex_get_file_name (const struct lexer *);
/* Current position. */
int lex_get_first_line_number (const struct lexer *, int n);
int lex_get_last_line_number (const struct lexer *, int n);
int lex_get_first_column (const struct lexer *, int n);
int lex_get_last_column (const struct lexer *, int n);
const char *lex_get_file_name (const struct lexer *);