---

yaml
---
r: 272813
b: refs/heads/beta
c: 3029e09
h: refs/heads/master
i:
  272811: ee99151

Author: bors

[refs]

@@ -23,7 +23,7 @@ refs/tags/0.9: 36870b185fc5f5486636d4515f0e22677493f225
 refs/tags/0.10: ac33f2b15782272ae348dbd7b14b8257b2148b5a
 refs/tags/0.11.0: e1247cb1d0d681be034adb4b558b5a0c0d5720f9
 refs/tags/0.12.0: f0c419429ef30723ceaf6b42f9b5a2aeb5d2e2d1
-refs/heads/beta: b3572ae15a8e5d9a8a1cdc1055425a4c3e0cf5f9
+refs/heads/beta: 3029e0918de00162932132a7972e566f3a3372f5
 refs/tags/1.0.0-alpha: e42bd6d93a1d3433c486200587f8f9e12590a4d7
 refs/heads/tmp: e06d2ad9fcd5027bcaac5b08fc9aa39a49d0ecd3
 refs/tags/1.0.0-alpha.2: 4c705f6bc559886632d3871b04f58aab093bfa2f

branches/beta/src/bootstrap/build/sanity.rs

@@ -79,7 +79,7 @@ pub fn check(build: &mut Build) {
         }
 
         // Make sure musl-root is valid if specified
-        if target.contains("musl") {
+        if target.contains("musl") && target.contains("x86_64") {
             match build.config.musl_root {
                 Some(ref root) => {
                     if fs::metadata(root.join("lib/libc.a")).is_err() {

branches/beta/src/doc/book/vectors.md

@@ -115,6 +115,36 @@ for i in v {
 }
 ```
 
+Note: You cannot use the vector again once you have iterated by taking ownership of the vector.
+You can iterate the vector multiple times by taking a reference to the vector whilst iterating. 
+For example, the following code does not compile.
+
+```rust,ignore
+let mut v = vec![1, 2, 3, 4, 5];
+
+for i in v {
+    println!("Take ownership of the vector and its element {}", i);
+}
+
+for i in v {
+    println!("Take ownership of the vector and its element {}", i);
+}
+```
+
+Whereas the following works perfectly,
+
+```rust
+let mut v = vec![1, 2, 3, 4, 5];
+
+for i in &v {
+    println!("This is a reference to {}", i);
+}
+
+for i in &v {
+    println!("This is a reference to {}", i);
+}
+```
+
 Vectors have many more useful methods, which you can read about in [their
 API documentation][vec].
 

branches/beta/src/libcore/iter.rs

@@ -1532,7 +1532,7 @@ pub trait Iterator {
     /// An iterator adaptor that applies a function, producing a single, final value.
     ///
     /// `fold()` takes two arguments: an initial value, and a closure with two
-    /// arguments: an 'accumulator', and an element. It returns the value that
+    /// arguments: an 'accumulator', and an element. The closure returns the value that
     /// the accumulator should have for the next iteration.
     ///
     /// The initial value is the value the accumulator will have on the first
@@ -3851,6 +3851,17 @@ impl<I> Iterator for Skip<I> where I: Iterator {
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<I> ExactSizeIterator for Skip<I> where I: ExactSizeIterator {}
 
+#[stable(feature = "double_ended_skip_iterator", since = "1.8.0")]
+impl<I> DoubleEndedIterator for Skip<I> where I: DoubleEndedIterator + ExactSizeIterator {
+    fn next_back(&mut self) -> Option<Self::Item> {
+        if self.len() > 0 {
+            self.iter.next_back()
+        } else {
+            None
+        }
+    }
+}
+
 /// An iterator that only iterates over the first `n` iterations of `iter`.
 ///
 /// This `struct` is created by the [`take()`] method on [`Iterator`]. See its

branches/beta/src/libcore/str/mod.rs

@@ -1095,8 +1095,6 @@ fn eq_slice(a: &str, b: &str) -> bool {
 /// faster than comparing each byte in a loop.
 #[inline]
 unsafe fn cmp_slice(a: &str, b: &str, len: usize) -> i32 {
-    // NOTE: In theory n should be libc::size_t and not usize, but libc is not available here
-    #[allow(improper_ctypes)]
     extern { fn memcmp(s1: *const i8, s2: *const i8, n: usize) -> i32; }
     memcmp(a.as_ptr() as *const i8, b.as_ptr() as *const i8, len)
 }

branches/beta/src/libcoretest/iter.rs

@@ -303,6 +303,44 @@ fn test_iterator_skip() {
     assert_eq!(it.len(), 0);
 }
 
+#[test]
+fn test_iterator_skip_doubleended() {
+    let xs = [0, 1, 2, 3, 5, 13, 15, 16, 17, 19, 20, 30];
+    let mut it = xs.iter().rev().skip(5);
+    assert_eq!(it.next(), Some(&15));
+    assert_eq!(it.by_ref().rev().next(), Some(&0));
+    assert_eq!(it.next(), Some(&13));
+    assert_eq!(it.by_ref().rev().next(), Some(&1));
+    assert_eq!(it.next(), Some(&5));
+    assert_eq!(it.by_ref().rev().next(), Some(&2));
+    assert_eq!(it.next(), Some(&3));
+    assert_eq!(it.next(), None);
+    let mut it = xs.iter().rev().skip(5).rev();
+    assert_eq!(it.next(), Some(&0));
+    assert_eq!(it.rev().next(), Some(&15));
+    let mut it_base = xs.iter();
+    {
+        let mut it = it_base.by_ref().skip(5).rev();
+        assert_eq!(it.next(), Some(&30));
+        assert_eq!(it.next(), Some(&20));
+        assert_eq!(it.next(), Some(&19));
+        assert_eq!(it.next(), Some(&17));
+        assert_eq!(it.next(), Some(&16));
+        assert_eq!(it.next(), Some(&15));
+        assert_eq!(it.next(), Some(&13));
+        assert_eq!(it.next(), None);
+    }
+    // make sure the skipped parts have not been consumed
+    assert_eq!(it_base.next(), Some(&0));
+    assert_eq!(it_base.next(), Some(&1));
+    assert_eq!(it_base.next(), Some(&2));
+    assert_eq!(it_base.next(), Some(&3));
+    assert_eq!(it_base.next(), Some(&5));
+    assert_eq!(it_base.next(), None);
+    let it = xs.iter().skip(5).rev();
+    assert_eq!(it.last(), Some(&13));
+}
+
 #[test]
 fn test_iterator_skip_nth() {
     let xs = [0, 1, 2, 3, 5, 13, 15, 16, 17, 19, 20, 30];

branches/beta/src/librustc_typeck/check/_match.rs

@@ -203,7 +203,7 @@ pub fn check_pat<'a, 'tcx>(pcx: &pat_ctxt<'a, 'tcx>,
             check_pat_enum(pcx, pat, path, subpats.as_ref().map(|v| &v[..]), expected, true);
         }
         PatKind::Path(ref path) => {
-            check_pat_enum(pcx, pat, path, None, expected, false);
+            check_pat_enum(pcx, pat, path, Some(&[]), expected, false);
         }
         PatKind::QPath(ref qself, ref path) => {
             let self_ty = fcx.to_ty(&qself.ty);
@@ -597,12 +597,12 @@ fn bad_struct_kind_err(sess: &Session, pat: &hir::Pat, path: &hir::Path, lint: b
     }
 }
 
-pub fn check_pat_enum<'a, 'tcx>(pcx: &pat_ctxt<'a, 'tcx>,
-                                pat: &hir::Pat,
-                                path: &hir::Path,
-                                subpats: Option<&'tcx [P<hir::Pat>]>,
-                                expected: Ty<'tcx>,
-                                is_tuple_struct_pat: bool)
+fn check_pat_enum<'a, 'tcx>(pcx: &pat_ctxt<'a, 'tcx>,
+                            pat: &hir::Pat,
+                            path: &hir::Path,
+                            subpats: Option<&'tcx [P<hir::Pat>]>,
+                            expected: Ty<'tcx>,
+                            is_tuple_struct_pat: bool)
 {
     // Typecheck the path.
     let fcx = pcx.fcx;
@@ -685,59 +685,41 @@ pub fn check_pat_enum<'a, 'tcx>(pcx: &pat_ctxt<'a, 'tcx>,
     demand::eqtype(fcx, pat.span, expected, pat_ty);
 
     let real_path_ty = fcx.node_ty(pat.id);
-    let (arg_tys, kind_name): (Vec<_>, &'static str) = match real_path_ty.sty {
+    let (kind_name, variant, expected_substs) = match real_path_ty.sty {
         ty::TyEnum(enum_def, expected_substs) => {
             let variant = enum_def.variant_of_def(def);
-            if variant.kind() == ty::VariantKind::Struct {
-                report_bad_struct_kind(false);
-                return;
-            }
-            if is_tuple_struct_pat && variant.kind() != ty::VariantKind::Tuple {
-                // Matching unit variants with tuple variant patterns (`UnitVariant(..)`)
-                // is allowed for backward compatibility.
-                let is_special_case = variant.kind() == ty::VariantKind::Unit;
-                report_bad_struct_kind(is_special_case);
-                if !is_special_case {
-                    return
-                }
-            }
-            (variant.fields
-                    .iter()
-                    .map(|f| fcx.instantiate_type_scheme(pat.span,
-                                                         expected_substs,
-                                                         &f.unsubst_ty()))
-                    .collect(),
-             "variant")
+            ("variant", variant, expected_substs)
         }
         ty::TyStruct(struct_def, expected_substs) => {
             let variant = struct_def.struct_variant();
-            if is_tuple_struct_pat && variant.kind() != ty::VariantKind::Tuple {
-                // Matching unit structs with tuple variant patterns (`UnitVariant(..)`)
-                // is allowed for backward compatibility.
-                let is_special_case = variant.kind() == ty::VariantKind::Unit;
-                report_bad_struct_kind(is_special_case);
-                return;
-            }
-            (variant.fields
-                    .iter()
-                    .map(|f| fcx.instantiate_type_scheme(pat.span,
-                                                         expected_substs,
-                                                         &f.unsubst_ty()))
-                    .collect(),
-             "struct")
+            ("struct", variant, expected_substs)
         }
         _ => {
             report_bad_struct_kind(false);
             return;
         }
     };
 
+    match (is_tuple_struct_pat, variant.kind()) {
+        (true, ty::VariantKind::Unit) => {
+            // Matching unit structs with tuple variant patterns (`UnitVariant(..)`)
+            // is allowed for backward compatibility.
+            report_bad_struct_kind(true);
+        }
+        (_, ty::VariantKind::Struct) => {
+            report_bad_struct_kind(false);
+            return
+        }
+        _ => {}
+    }
+
     if let Some(subpats) = subpats {
-        if subpats.len() == arg_tys.len() {
-            for (subpat, arg_ty) in subpats.iter().zip(arg_tys) {
-                check_pat(pcx, &subpat, arg_ty);
+        if subpats.len() == variant.fields.len() {
+            for (subpat, field) in subpats.iter().zip(&variant.fields) {
+                let field_ty = fcx.field_ty(subpat.span, field, expected_substs);
+                check_pat(pcx, &subpat, field_ty);
             }
-        } else if arg_tys.is_empty() {
+        } else if variant.fields.is_empty() {
             span_err!(tcx.sess, pat.span, E0024,
                       "this pattern has {} field{}, but the corresponding {} has no fields",
                       subpats.len(), if subpats.len() == 1 {""} else {"s"}, kind_name);
@@ -750,7 +732,7 @@ pub fn check_pat_enum<'a, 'tcx>(pcx: &pat_ctxt<'a, 'tcx>,
                       "this pattern has {} field{}, but the corresponding {} has {} field{}",
                       subpats.len(), if subpats.len() == 1 {""} else {"s"},
                       kind_name,
-                      arg_tys.len(), if arg_tys.len() == 1 {""} else {"s"});
+                      variant.fields.len(), if variant.fields.len() == 1 {""} else {"s"});
 
             for pat in subpats {
                 check_pat(pcx, &pat, tcx.types.err);

branches/beta/src/libstd/build.rs

@@ -28,7 +28,7 @@ fn main() {
     }
 
     if target.contains("unknown-linux") {
-        if target.contains("musl") {
+        if target.contains("musl") && target.contains("x86_64") {
             println!("cargo:rustc-link-lib=static=unwind");
         } else {
             println!("cargo:rustc-link-lib=dl");

branches/beta/src/test/compile-fail/issue-32004.rs

@@ -0,0 +1,29 @@
+// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <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.
+
+enum Foo {
+    Bar(i32),
+    Baz
+}
+
+struct S;
+
+fn main() {
+    match Foo::Baz {
+        Foo::Bar => {}
+        //~^ ERROR this pattern has 0 fields, but the corresponding variant
+        _ => {}
+    }
+
+    match S {
+        S(()) => {}
+        //~^ ERROR this pattern has 1 field, but the corresponding struct
+    }
+}

branches/beta/src/test/rustdoc/issue-27362.rs

@@ -10,6 +10,7 @@
 
 // aux-build:issue-27362.rs
 // ignore-cross-compile
+// ignore-test This test fails on beta/stable #32019
 
 extern crate issue_27362;
 pub use issue_27362 as quux;