hacklang - 如何在hacklang中迭代形状的字段？

Question

说我有这样的形状

$something = shape(
  'some_key' => ...,
  'another_key' => ...,
  ...
);

如何迭代形状的每个字段？我正在寻找这样的东西

foreach ($something as $key) {
  ...
}

Answer 1

dict使用内置HH\Shapes::toDict然后迭代转换为第一个：

foreach(HH\Shapes::toDict($something) as $k => $v) {
  // ...
}