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Remove `box-syntax` from unstable book

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clubby789 2023-02-27 13:18:13 +00:00
parent 0932452fa4
commit a8d5950b4d
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src/doc/unstable-book/src/language-features/box-syntax.md
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# `box_syntax`
The tracking issue for this feature is: [#49733]
[#49733]: https://github.com/rust-lang/rust/issues/49733
See also [`box_patterns`](box-patterns.md)
------------------------
Currently the only stable way to create a `Box` is via the `Box::new` method.
Also it is not possible in stable Rust to destructure a `Box` in a match
pattern. The unstable `box` keyword can be used to create a `Box`. An example
usage would be:
```rust
#![feature(box_syntax)]
fn main() {
let b = box 5;
}
```