hphp/hack/test/hover/vector_literal.php.exp

   1 final class Vector
   2 `Vector` is a stack-like collection. HHVM provides a native implementation
   3 for this class. The PHP class definition below is not actually used at run
   4 time; it is simply provided for the typechecker and for developer reference.
   5
   6 Like all objects in PHP, `Vector`s have reference-like semantics. When a
   7 caller passes a `Vector` to a callee, the callee can modify the `Vector` and
   8 the caller will see the changes. `Vector`s do not have "copy-on-write"
   9 semantics.
  10
  11 `Vector`s only support integer keys. If a non-integer key is used, an
  12 exception will be thrown.
  13
  14 `Vector`s support `$m[$k]` style syntax for getting and setting values by
  15 key. `Vector`s also support `isset($m[$k])` and `empty($m[$k])` syntax, and
  16 they provide similar semantics as arrays. Elements can be added to a
  17 `Vector` using `$m[] = ..` syntax.
  18
  19 `Vector`s do not support iterating while new elements are being added or
  20 elements are being removed. When a new element is added or removed, all
  21 iterators that point to the `Vector` shall be considered invalid.
  22
  23 @guide /hack/collections/introduction
  24 @guide /hack/collections/classes