bool lex_force_match (struct lexer *, enum token_type) WARN_UNUSED_RESULT;
bool lex_force_match_id (struct lexer *, const char *) WARN_UNUSED_RESULT;
bool lex_force_int (struct lexer *) WARN_UNUSED_RESULT;
bool lex_force_match (struct lexer *, enum token_type) WARN_UNUSED_RESULT;
bool lex_force_match_id (struct lexer *, const char *) WARN_UNUSED_RESULT;
bool lex_force_int (struct lexer *) WARN_UNUSED_RESULT;
bool lex_force_num (struct lexer *) WARN_UNUSED_RESULT;
bool lex_force_id (struct lexer *) WARN_UNUSED_RESULT;
bool lex_force_string (struct lexer *) WARN_UNUSED_RESULT;
bool lex_force_num (struct lexer *) WARN_UNUSED_RESULT;
bool lex_force_id (struct lexer *) WARN_UNUSED_RESULT;
bool lex_force_string (struct lexer *) WARN_UNUSED_RESULT;