hphp/test/slow/keyset/to-keyset.php

   1 <?hh
   2
   3 class IObj implements Iterator {
   4   public function __construct(private dict $arr) {}
   5   public function rewind() { reset($this->arr); }
   6   public function current() { return current($this->arr); }
   7   public function key() { return key($this->arr); }
   8   public function next() { return next($this->arr); }
   9   public function valid() { return key($this->arr); }
  10 }
  11
  12 function gen() {
  13   yield 'a' => 'b';
  14   yield '1' => 'one';
  15   yield 1 => 'ONE';
  16 }
  17
  18 $arr = dict['q' => 'r', 1 => 'un', '1' => 'uno'];
  19
  20 var_dump(keyset(new IObj($arr)));
  21 var_dump(keyset(gen()));