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-rw-r--r--src/doc/unstable-book/src/language-features/extern-in-paths.md40
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-# `extern_in_paths`
-
-The tracking issue for this feature is: [#44660]
-
-[#44660]: https://github.com/rust-lang/rust/issues/44660
-
-------------------------
-
-The `extern_in_paths` feature allows to refer to names from other crates "inline", without
-introducing `extern crate` items, using keyword `extern`.
-
-For example, `extern::my_crat::a::b` will resolve to path `a::b` in crate `my_crate`.
-
-Absolute paths on 2018 edition (e.g. `::my_crate::a::b`) provide the same effect
-and resolve to extern crates (built-in or passed with `--extern`).
-
-```rust,ignore
-#![feature(extern_in_paths)]
-
-// Suppose we have a dependency crate `xcrate` available through `Cargo.toml`, or `--extern`
-// options, or standard Rust distribution, or some other means.
-
-use extern::xcrate::Z;
-
-fn f() {
-    use extern::xcrate;
-    use extern::xcrate as ycrate;
-    let s = xcrate::S;
-    assert_eq!(format!("{:?}", s), "S");
-    let z = ycrate::Z;
-    assert_eq!(format!("{:?}", z), "Z");
-}
-
-fn main() {
-    let s = extern::xcrate::S;
-    assert_eq!(format!("{:?}", s), "S");
-    let z = Z;
-    assert_eq!(format!("{:?}", z), "Z");
-}
-```