void lex_error (struct lexer *, const char *, ...) PRINTF_FORMAT (2, 3);
void lex_next_error (struct lexer *, int n0, int n1, const char *, ...)
PRINTF_FORMAT (4, 5);
void lex_error (struct lexer *, const char *, ...) PRINTF_FORMAT (2, 3);
void lex_next_error (struct lexer *, int n0, int n1, const char *, ...)
PRINTF_FORMAT (4, 5);