curry.php 1.3 KB

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  1. <?php
  2. /*
  3. * StatusNet - the distributed open-source microblogging tool
  4. * Copyright (C) 2008, 2009, StatusNet, Inc.
  5. *
  6. * This program is free software: you can redistribute it and/or modify
  7. * it under the terms of the GNU Affero General Public License as published by
  8. * the Free Software Foundation, either version 3 of the License, or
  9. * (at your option) any later version.
  10. *
  11. * This program is distributed in the hope that it will be useful,
  12. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14. * GNU Affero General Public License for more details.
  15. *
  16. * You should have received a copy of the GNU Affero General Public License
  17. * along with this program. If not, see <http://www.gnu.org/licenses/>.
  18. */
  19. /**
  20. * PHP 5.3 implementation of function currying, using native closures.
  21. * On 5.2 and lower we use the fallback implementation in util.php
  22. *
  23. * @param callback $fn
  24. * @param ... any remaining arguments will be appended to call-time params
  25. * @return callback
  26. */
  27. function curry($fn) {
  28. $extra_args = func_get_args();
  29. array_shift($extra_args);
  30. return function() use ($fn, $extra_args) {
  31. $args = func_get_args();
  32. return call_user_func_array($fn,
  33. array_merge($args, $extra_args));
  34. };
  35. }