Merge remote-tracking branch 'upstream/master' into string-splice-sta…

…bilize

src/bootstrap/channel.rs

@@ -24,7 +24,7 @@ use Build;
 use config::Config;
 
 // The version number
-pub const CFG_RELEASE_NUM: &str = "1.26.0";
+pub const CFG_RELEASE_NUM: &str = "1.27.0";
 
 pub struct GitInfo {
     inner: Option<Info>,

src/liballoc/arc.rs

@@ -21,6 +21,7 @@ use core::sync::atomic::Ordering::{Acquire, Relaxed, Release, SeqCst};
 use core::borrow;
 use core::fmt;
 use core::cmp::Ordering;
+use core::heap::{Alloc, Layout};
 use core::intrinsics::abort;
 use core::mem::{self, align_of_val, size_of_val, uninitialized};
 use core::ops::Deref;
@@ -31,7 +32,7 @@ use core::hash::{Hash, Hasher};
 use core::{isize, usize};
 use core::convert::From;
 
-use heap::{Heap, Alloc, Layout, box_free};
+use heap::{Heap, box_free};
 use boxed::Box;
 use string::String;
 use vec::Vec;

src/liballoc/boxed.rs

@@ -55,14 +55,15 @@
 
 #![stable(feature = "rust1", since = "1.0.0")]
 
-use heap::{Heap, Layout, Alloc};
+use heap::Heap;
 use raw_vec::RawVec;
 
 use core::any::Any;
 use core::borrow;
 use core::cmp::Ordering;
 use core::fmt;
 use core::hash::{Hash, Hasher};
+use core::heap::{Alloc, Layout};
 use core::iter::FusedIterator;
 use core::marker::{self, Unpin, Unsize};
 use core::mem::{self, Pin};

src/liballoc/btree/node.rs

@@ -41,13 +41,14 @@
 // - A node of length `n` has `n` keys, `n` values, and (in an internal node) `n + 1` edges.
 //   This implies that even an empty internal node has at least one edge.
 
+use core::heap::{Alloc, Layout};
 use core::marker::PhantomData;
 use core::mem;
 use core::ptr::{self, Unique, NonNull};
 use core::slice;
 
 use boxed::Box;
-use heap::{Heap, Alloc, Layout};
+use heap::Heap;
 
 const B: usize = 6;
 pub const MIN_LEN: usize = B - 1;

src/liballoc/raw_vec.rs

@@ -9,11 +9,12 @@
 // except according to those terms.
 
 use core::cmp;
+use core::heap::{Alloc, Layout};
 use core::mem;
 use core::ops::Drop;
 use core::ptr::{self, Unique};
 use core::slice;
-use heap::{Alloc, Layout, Heap};
+use heap::Heap;
 use super::boxed::Box;
 use super::allocator::CollectionAllocErr;
 use super::allocator::CollectionAllocErr::*;

src/liballoc/rc.rs

@@ -250,6 +250,7 @@ use core::cell::Cell;
 use core::cmp::Ordering;
 use core::fmt;
 use core::hash::{Hash, Hasher};
+use core::heap::{Alloc, Layout};
 use core::intrinsics::abort;
 use core::marker;
 use core::marker::{Unsize, PhantomData};
@@ -259,7 +260,7 @@ use core::ops::CoerceUnsized;
 use core::ptr::{self, NonNull};
 use core::convert::From;
 
-use heap::{Heap, Alloc, Layout, box_free};
+use heap::{Heap, box_free};
 use string::String;
 use vec::Vec;
 

src/liballoc_jemalloc/lib.rs

@@ -15,7 +15,6 @@
                       form or name",
             issue = "27783")]
 #![deny(warnings)]
-#![feature(alloc)]
 #![feature(alloc_system)]
 #![feature(libc)]
 #![feature(linkage)]
@@ -25,7 +24,6 @@
 #![cfg_attr(not(dummy_jemalloc), feature(allocator_api))]
 #![rustc_alloc_kind = "exe"]
 
-extern crate alloc;
 extern crate alloc_system;
 extern crate libc;
 
@@ -35,7 +33,7 @@ pub use contents::*;
 mod contents {
     use core::ptr;
 
-    use alloc::heap::{Alloc, AllocErr, Layout};
+    use core::heap::{Alloc, AllocErr, Layout};
     use alloc_system::System;
     use libc::{c_int, c_void, size_t};
 

src/liballoc_system/lib.rs

@@ -17,7 +17,6 @@
             issue = "32838")]
 #![feature(global_allocator)]
 #![feature(allocator_api)]
-#![feature(alloc)]
 #![feature(core_intrinsics)]
 #![feature(staged_api)]
 #![feature(rustc_attrs)]
@@ -43,9 +42,7 @@ const MIN_ALIGN: usize = 8;
 #[allow(dead_code)]
 const MIN_ALIGN: usize = 16;
 
-extern crate alloc;
-
-use self::alloc::heap::{Alloc, AllocErr, Layout, Excess, CannotReallocInPlace};
+use core::heap::{Alloc, AllocErr, Layout, Excess, CannotReallocInPlace};
 
 #[unstable(feature = "allocator_api", issue = "32838")]
 pub struct System;
@@ -125,7 +122,7 @@ mod platform {
 
     use MIN_ALIGN;
     use System;
-    use alloc::heap::{Alloc, AllocErr, Layout};
+    use core::heap::{Alloc, AllocErr, Layout};
 
     #[unstable(feature = "allocator_api", issue = "32838")]
     unsafe impl<'a> Alloc for &'a System {
@@ -279,7 +276,7 @@ mod platform {
 
     use MIN_ALIGN;
     use System;
-    use alloc::heap::{Alloc, AllocErr, Layout, CannotReallocInPlace};
+    use core::heap::{Alloc, AllocErr, Layout, CannotReallocInPlace};
 
     type LPVOID = *mut u8;
     type HANDLE = LPVOID;
@@ -491,7 +488,7 @@ mod platform {
 mod platform {
     extern crate dlmalloc;
 
-    use alloc::heap::{Alloc, AllocErr, Layout, Excess, CannotReallocInPlace};
+    use core::heap::{Alloc, AllocErr, Layout, Excess, CannotReallocInPlace};
     use System;
     use self::dlmalloc::GlobalDlmalloc;
 

src/libcore/ops/drop.rs

@@ -95,7 +95,7 @@
 pub trait Drop {
     /// Executes the destructor for this type.
     ///
-    /// This method is called implilcitly when the value goes out of scope,
+    /// This method is called implicitly when the value goes out of scope,
     /// and cannot be called explicitly (this is compiler error [E0040]).
     /// However, the [`std::mem::drop`] function in the prelude can be
     /// used to call the argument's `Drop` implementation.

src/libstd/collections/hash/map.rs

@@ -11,9 +11,10 @@
 use self::Entry::*;
 use self::VacantEntryState::*;
 
-use alloc::heap::{Heap, Alloc};
+use alloc::heap::Heap;
 use alloc::allocator::CollectionAllocErr;
 use cell::Cell;
+use core::heap::Alloc;
 use borrow::Borrow;
 use cmp::max;
 use fmt::{self, Debug};

src/libstd/collections/hash/table.rs

@@ -8,7 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use alloc::heap::{Heap, Alloc, Layout};
+use alloc::heap::Heap;
+use core::heap::{Alloc, Layout};
 
 use cmp;
 use hash::{BuildHasher, Hash, Hasher};

src/libstd/process.rs

@@ -1420,14 +1420,13 @@ pub fn abort() -> ! {
 /// Basic usage:
 ///
 /// ```no_run
-/// #![feature(getpid)]
 /// use std::process;
 ///
 /// println!("My pid is {}", process::id());
 /// ```
 ///
 ///
-#[unstable(feature = "getpid", issue = "44971", reason = "recently added")]
+#[stable(feature = "getpid", since = "1.27.0")]
 pub fn id() -> u32 {
     ::sys::os::getpid()
 }

src/libsyntax/ast.rs

@@ -837,6 +837,13 @@ impl Stmt {
             _ => false,
         }
     }
+
+    pub fn is_expr(&self) -> bool {
+        match self.node {
+            StmtKind::Expr(_) => true,
+            _ => false,
+        }
+    }
 }
 
 impl fmt::Debug for Stmt {

src/libsyntax/config.rs

@@ -149,17 +149,24 @@ impl<'a> StripUnconfigured<'a> {
     fn visit_expr_attrs(&mut self, attrs: &[ast::Attribute]) {
         // flag the offending attributes
         for attr in attrs.iter() {
-            if !self.features.map(|features| features.stmt_expr_attributes).unwrap_or(true) {
-                let mut err = feature_err(self.sess,
-                                          "stmt_expr_attributes",
-                                          attr.span,
-                                          GateIssue::Language,
-                                          EXPLAIN_STMT_ATTR_SYNTAX);
-                if attr.is_sugared_doc {
-                    err.help("`///` is for documentation comments. For a plain comment, use `//`.");
-                }
-                err.emit();
+            self.maybe_emit_expr_attr_err(attr);
+        }
+    }
+
+    /// If attributes are not allowed on expressions, emit an error for `attr`
+    pub fn maybe_emit_expr_attr_err(&self, attr: &ast::Attribute) {
+        if !self.features.map(|features| features.stmt_expr_attributes).unwrap_or(true) {
+            let mut err = feature_err(self.sess,
+                                      "stmt_expr_attributes",
+                                      attr.span,
+                                      GateIssue::Language,
+                                      EXPLAIN_STMT_ATTR_SYNTAX);
+
+            if attr.is_sugared_doc {
+                err.help("`///` is for documentation comments. For a plain comment, use `//`.");
             }
+
+            err.emit();
         }
     }
 

src/libsyntax/edition.rs

@@ -55,6 +55,13 @@ impl Edition {
             Edition::Edition2018 => "edition_2018",
         }
     }
+
+    pub fn feature_name(&self) -> &'static str {
+        match *self {
+            Edition::Edition2015 => "rust_2015_preview",
+            Edition::Edition2018 => "rust_2018_preview",
+        }
+    }
 }
 
 impl FromStr for Edition {

src/libsyntax/ext/base.rs

@@ -38,6 +38,8 @@ pub enum Annotatable {
     Item(P<ast::Item>),
     TraitItem(P<ast::TraitItem>),
     ImplItem(P<ast::ImplItem>),
+    Stmt(P<ast::Stmt>),
+    Expr(P<ast::Expr>),
 }
 
 impl HasAttrs for Annotatable {
@@ -46,6 +48,8 @@ impl HasAttrs for Annotatable {
             Annotatable::Item(ref item) => &item.attrs,
             Annotatable::TraitItem(ref trait_item) => &trait_item.attrs,
             Annotatable::ImplItem(ref impl_item) => &impl_item.attrs,
+            Annotatable::Stmt(ref stmt) => stmt.attrs(),
+            Annotatable::Expr(ref expr) => &expr.attrs,
         }
     }
 
@@ -54,6 +58,8 @@ impl HasAttrs for Annotatable {
             Annotatable::Item(item) => Annotatable::Item(item.map_attrs(f)),
             Annotatable::TraitItem(trait_item) => Annotatable::TraitItem(trait_item.map_attrs(f)),
             Annotatable::ImplItem(impl_item) => Annotatable::ImplItem(impl_item.map_attrs(f)),
+            Annotatable::Stmt(stmt) => Annotatable::Stmt(stmt.map_attrs(f)),
+            Annotatable::Expr(expr) => Annotatable::Expr(expr.map_attrs(f)),
         }
     }
 }
@@ -64,6 +70,8 @@ impl Annotatable {
             Annotatable::Item(ref item) => item.span,
             Annotatable::TraitItem(ref trait_item) => trait_item.span,
             Annotatable::ImplItem(ref impl_item) => impl_item.span,
+            Annotatable::Stmt(ref stmt) => stmt.span,
+            Annotatable::Expr(ref expr) => expr.span,
         }
     }