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 *);
+struct msg_location *lex_get_location (const struct lexer *, int n0, int n1);
+struct msg_location *lex_get_lines (const struct lexer *, int n0, int n1);
const char *lex_get_encoding (const struct lexer *);
/* Issuing errors. */