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| -rw-r--r-- | src/doc/unstable-book/src/the-unstable-book.md | 20 |
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diff --git a/src/doc/unstable-book/src/the-unstable-book.md b/src/doc/unstable-book/src/the-unstable-book.md index 022f57b7ee5..dfbfe4cab97 100644 --- a/src/doc/unstable-book/src/the-unstable-book.md +++ b/src/doc/unstable-book/src/the-unstable-book.md @@ -1,2 +1,22 @@ # The Unstable Book +Welcome to the Unstable Book! This book consists of a number of chapters, +each one organized by a "feature flag." That is, when using an unstable +feature of Rust, you must use a flag, like this: + +```rust +#![feature(box_syntax)] + +fn main() { + let five = box 5; +} +``` + +The `box_syntax` feature [has a chapter][box] describing how to use it. + +[box]: box-syntax.html + +Because this documentation relates to unstable features, we make no guarantees +that what is contained here is accurate or up to date. It's developed on a +best-effort basis. Each page will have a link to its tracking issue with the +latest developments; you might want to check those as well. |