src/doc/unstable-book/src/box-syntax.md

   1 # `box_syntax`
   2
   3 The tracking issue for this feature is: [#27779]
   4
   5 [#27779]: https://github.com/rust-lang/rust/issues/27779
   6
   7 See also [`box_patterns`](box-patterns.html)
   8
   9 ------------------------
  10
  11 Currently the only stable way to create a `Box` is via the `Box::new` method.
  12 Also it is not possible in stable Rust to destructure a `Box` in a match
  13 pattern. The unstable `box` keyword can be used to create a `Box`. An example
  14 usage would be:
  15
  16 ```rust
  17 #![feature(box_syntax)]
  18
  19 fn main() {
  20     let b = box 5;
  21 }
  22 ```