Split slice part of feature(half_open_range_patterns) to [...]_in_slices

1 files changed, 30 insertions, 0 deletions

diff --git a/src/doc/unstable-book/src/language-features/half-open-range-patterns-in-slices.md b/src/doc/unstable-book/src/language-features/half-open-range-patterns-in-slices.md
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+# `half_open_range_patterns_in_slices`
+
+The tracking issue for this feature is: [#67264]
+It is part of the `exclusive_range_pattern` feature,
+tracked at [#37854].
+
+[#67264]: https://github.com/rust-lang/rust/issues/67264
+[#37854]: https://github.com/rust-lang/rust/issues/37854
+-----
+
+This feature allow using top-level half-open range patterns in slices.
+
+```rust
+#![feature(half_open_range_patterns_in_slices)]
+#![feature(exclusive_range_pattern)]
+
+fn main() {
+    let xs = [13, 1, 5, 2, 3, 1, 21, 8];
+    let [a @ 3.., b @ ..3, c @ 4..6, ..] = xs else { return; };
+}
+```
+
+Note that this feature is not required if the patterns are wrapped between parenthesis.
+
+```rust
+fn main() {
+    let xs = [13, 1];
+    let [(a @ 3..), c] = xs else { return; };
+}
+```