Put slicing syntax behind a feature gate.

[breaking-change]

If you are using slicing syntax you will need to add #![feature(slicing_syntax)] to your crate.

Author: Nick Cameron

src/compiletest/compiletest.rs

@@ -9,7 +9,7 @@
 // except according to those terms.
 
 #![crate_type = "bin"]
-#![feature(phase)]
+#![feature(phase, slicing_syntax)]
 
 #![deny(warnings)]
 

src/doc/reference.md

@@ -3828,7 +3828,7 @@ type signature of `print`, and the cast expression in `main`.
 Within the body of an item that has type parameter declarations, the names of
 its type parameters are types:
 
-```
+```ignore
 fn map<A: Clone, B: Clone>(f: |A| -> B, xs: &[A]) -> Vec<B> {
     if xs.len() == 0 {
        return vec![];

src/libcollections/lib.rs

@@ -19,8 +19,9 @@
        html_root_url = "http://doc.rust-lang.org/master/",
        html_playground_url = "http://play.rust-lang.org/")]
 
+#![allow(unknown_features)]
 #![feature(macro_rules, managed_boxes, default_type_params, phase, globs)]
-#![feature(unsafe_destructor, import_shadowing)]
+#![feature(unsafe_destructor, import_shadowing, slicing_syntax)]
 #![no_std]
 
 #[phase(plugin, link)] extern crate core;

src/libcollections/slice.rs

@@ -51,9 +51,12 @@
 //! interval `[a, b)`:
 //!
 //! ```rust
-//! let numbers = [0i, 1i, 2i];
-//! let last_numbers = numbers[1..3];
-//! // last_numbers is now &[1i, 2i]
+//! #![feature(slicing_syntax)]
+//! fn main() {
+//!     let numbers = [0i, 1i, 2i];
+//!     let last_numbers = numbers[1..3];
+//!     // last_numbers is now &[1i, 2i]
+//! }
 //! ```
 //!
 //! ## Implementations of other traits

src/libcollections/string.rs

@@ -160,7 +160,7 @@ impl String {
 
         if i > 0 {
             unsafe {
-                res.as_mut_vec().push_all(v.[..i])
+                res.as_mut_vec().push_all(v[..i])
             };
         }
 
@@ -177,7 +177,7 @@ impl String {
             macro_rules! error(() => ({
                 unsafe {
                     if subseqidx != i_ {
-                        res.as_mut_vec().push_all(vv[subseqidx..i_]);
+                        res.as_mut_vec().push_all(v[subseqidx..i_]);
                     }
                     subseqidx = i;
                     res.as_mut_vec().push_all(REPLACEMENT);

src/libcore/lib.rs

@@ -57,8 +57,9 @@
        html_playground_url = "http://play.rust-lang.org/")]
 
 #![no_std]
+#![allow(unknown_features)]
 #![feature(globs, intrinsics, lang_items, macro_rules, managed_boxes, phase)]
-#![feature(simd, unsafe_destructor)]
+#![feature(simd, unsafe_destructor, slicing_syntax)]
 #![deny(missing_doc)]
 
 mod macros;

src/libcore/ops.rs

@@ -684,7 +684,7 @@ pub trait IndexMut<Index, Result> {
  * A trivial implementation of `Slice`. When `Foo[..Foo]` happens, it ends up
  * calling `slice_to`, and therefore, `main` prints `Slicing!`.
  *
- * ```
+ * ```ignore
  * struct Foo;
  *
  * impl ::core::ops::Slice<Foo, Foo> for Foo {
@@ -749,7 +749,7 @@ pub trait Slice<Idx, Sized? Result> for Sized? {
  * A trivial implementation of `SliceMut`. When `Foo[Foo..]` happens, it ends up
  * calling `slice_from_mut`, and therefore, `main` prints `Slicing!`.
  *
- * ```
+ * ```ignore
  * struct Foo;
  *
  * impl ::core::ops::SliceMut<Foo, Foo> for Foo {
@@ -771,7 +771,7 @@ pub trait Slice<Idx, Sized? Result> for Sized? {
  *     }
  * }
  *
- * fn main() {
+ * pub fn main() {
  *     Foo[mut Foo..];
  * }
  * ```

src/libcore/slice.rs

@@ -814,13 +814,13 @@ impl<'a,T> MutableSlice<'a, T> for &'a mut [T] {
     #[inline]
     fn tail_mut(self) -> &'a mut [T] {
         let len = self.len();
-        self.slice_mut(1, len)
+        self[mut 1..len]
     }
 
     #[inline]
     fn init_mut(self) -> &'a mut [T] {
         let len = self.len();
-        self.slice_mut(0, len - 1)
+        self[mut 0..len - 1]
     }
 
     #[inline]

src/libcoretest/lib.rs

@@ -7,7 +7,7 @@
 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
-#![feature(globs, unsafe_destructor, macro_rules)]
+#![feature(globs, unsafe_destructor, macro_rules, slicing_syntax)]
 
 extern crate core;
 extern crate test;

src/libnative/lib.rs

@@ -57,7 +57,8 @@
 
 #![deny(unused_result, unused_must_use)]
 #![allow(non_camel_case_types, deprecated)]
-#![feature(default_type_params, lang_items)]
+#![allow(unknown_features)]
+#![feature(default_type_params, lang_items, slicing_syntax)]
 
 // NB this crate explicitly does *not* allow glob imports, please seriously
 //    consider whether they're needed before adding that feature here (the