---

yaml
---
r: 154815
b: refs/heads/try2
c: 3dc9deb
h: refs/heads/master
i:
  154813: dfdac3d
  154811: 0225a47
  154807: 4589a2e
  154799: 27f2430
  154783: 7f197ff
  154751: 9c4ebbf
v: v3

Author: carols10cents

[refs]

@@ -5,7 +5,7 @@ refs/heads/snap-stage3: 78a7676898d9f80ab540c6df5d4c9ce35bb50463
 refs/heads/try: 519addf6277dbafccbb4159db4b710c37eaa2ec5
 refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105
 refs/heads/ndm: f3868061cd7988080c30d6d5bf352a5a5fe2460b
-refs/heads/try2: c95aa9950fdbab2788b211e31e77d05ff3be7bc2
+refs/heads/try2: 3dc9deb6e5b41859dcbbe28d1e326d296a5e1bb9
 refs/heads/dist-snap: ba4081a5a8573875fed17545846f6f6902c8ba8d
 refs/tags/release-0.2: c870d2dffb391e14efb05aa27898f1f6333a9596
 refs/tags/release-0.3: b5f0d0f648d9a6153664837026ba1be43d3e2503

branches/try2/src/doc/complement-lang-faq.md

@@ -83,7 +83,7 @@ We want to maintain the option to parametrize at runtime. We may eventually chan
 
 ## Why aren't values type-parametric? Why only items?
 
-Doing so would make type inference much more complex, and require the implementation strategy of runtime parameterization.
+Doing so would make type inference much more complex, and require the implementation strategy of runtime parametrization.
 
 ## Why are enumerations nominal and closed?
 

branches/try2/src/doc/guide.md

@@ -1808,7 +1808,7 @@ our code in this file. We'll talk about multiple-file projects later on in the
 guide.
 
 Before we move on, let me show you one more Cargo command: `run`. `cargo run`
-is kind of like `cargo build`, but it also then runs the produced executable.
+is kind of like `cargo build`, but it also then runs the produced exectuable.
 Try it out:
 
 ```{notrust,ignore}

branches/try2/src/doc/rust.md

@@ -1954,7 +1954,7 @@ On `struct`s:
 
 - `repr` - specifies the representation to use for this struct. Takes a list
   of options. The currently accepted ones are `C` and `packed`, which may be
-  combined. `C` will use a C ABI compatible struct layout, and `packed` will
+  combined. `C` will use a C ABI comptible struct layout, and `packed` will
   remove any padding between fields (note that this is very fragile and may
   break platforms which require aligned access).
 
@@ -2367,7 +2367,7 @@ One can indicate the stability of an API using the following attributes:
 These levels are directly inspired by
 [Node.js' "stability index"](http://nodejs.org/api/documentation.html).
 
-Stability levels are inherited, so an item's stability attribute is the
+Stability levels are inherited, so an items's stability attribute is the
 default stability for everything nested underneath it.
 
 There are lints for disallowing items marked with certain levels: `deprecated`,
@@ -2444,7 +2444,7 @@ The currently implemented features of the reference compiler are:
 
 * `concat_idents` - Allows use of the `concat_idents` macro, which is in many
                     ways insufficient for concatenating identifiers, and may
-                    be removed entirely for something more wholesome.
+                    be removed entirely for something more wholsome.
 
 * `default_type_params` - Allows use of default type parameters. The future of
                           this feature is uncertain.
@@ -3604,7 +3604,7 @@ of the type.[^structtype]
 
 New instances of a `struct` can be constructed with a [struct expression](#structure-expressions).
 
-The memory layout of a `struct` is undefined by default to allow for compiler optimizations like
+The memory layout of a `struct` is undefined by default to allow for compiler optimziations like
 field reordering, but it can be fixed with the `#[repr(...)]` attribute.
 In either case, fields may be given in any order in a corresponding struct *expression*;
 the resulting `struct` value will always have the same memory layout.
@@ -3668,17 +3668,32 @@ let a: List<int> = Cons(7, box Cons(13, box Nil));
 
 All pointers in Rust are explicit first-class values.
 They can be copied, stored into data structures, and returned from functions.
-There are two varieties of pointer in Rust:
+There are four varieties of pointer in Rust:
+
+* Owning pointers (`Box`)
+  : These point to owned heap allocations (or "boxes") in the shared, inter-task heap.
+    Each owned box has a single owning pointer; pointer and pointee retain a 1:1 relationship at all times.
+    Owning pointers are written `Box<content>`,
+    for example `Box<int>` means an owning pointer to an owned box containing an integer.
+    Copying an owned box is a "deep" operation:
+    it involves allocating a new owned box and copying the contents of the old box into the new box.
+    Releasing an owning pointer immediately releases its corresponding owned box.
 
 * References (`&`)
   : These point to memory _owned by some other value_.
-    A reference type is written `&type` for some lifetime-variable `f`,
-    or just `&'a type` when you need an explicit lifetime.
+    References arise by (automatic) conversion from owning pointers, managed pointers,
+    or by applying the borrowing operator `&` to some other value,
+    including [lvalues, rvalues or temporaries](#lvalues,-rvalues-and-temporaries).
+    A borrow expression is written `&content`.
+
+    A reference type is written `&'f type` for some lifetime-variable `f`,
+    or just `&type` when the lifetime can be elided;
+    for example `&int` means a reference to an integer.
     Copying a reference is a "shallow" operation:
     it involves only copying the pointer itself.
     Releasing a reference typically has no effect on the value it points to,
-    with the exception of temporary values, which are released when the last
-    reference to them is released.
+    with the exception of temporary values,
+    which are released when the last reference to them is released.
 
 * Raw pointers (`*`)
   : Raw pointers are pointers without safety or liveness guarantees.
@@ -3691,9 +3706,6 @@ There are two varieties of pointer in Rust:
     they exist to support interoperability with foreign code,
     and writing performance-critical or low-level functions.
 
-The standard library contains addtional 'smart pointer' types beyond references
-and raw pointers.
-
 ### Function types
 
 The function type constructor `fn` forms new function types.
@@ -4202,7 +4214,7 @@ be ignored in favor of only building the artifacts specified by command line.
   purpose of this output type is to create a static library containing all of
   the local crate's code along with all upstream dependencies. The static
   library is actually a `*.a` archive on linux and osx and a `*.lib` file on
-  windows. This format is recommended for use in situations such as linking
+  windows. This format is recommended for use in situtations such as linking
   Rust code into an existing non-Rust application because it will not have
   dynamic dependencies on other Rust code.
 

branches/try2/src/libcollections/bitv.rs

@@ -95,6 +95,20 @@ fn match_words <'a,'b>(a: &'a Bitv, b: &'b Bitv) -> (MatchWords<'a>, MatchWords<
 static TRUE: bool = true;
 static FALSE: bool = false;
 
+#[deriving(Clone)]
+struct SmallBitv {
+    /// only the lowest nbits of this value are used. the rest is undefined.
+    bits: uint
+}
+
+#[deriving(Clone)]
+struct BigBitv {
+    storage: Vec<uint>
+}
+
+#[deriving(Clone)]
+enum BitvVariant { Big(BigBitv), Small(SmallBitv) }
+
 /// The bitvector type.
 ///
 /// # Example
@@ -1639,7 +1653,6 @@ impl<'a> Iterator<uint> for TwoBitPositions<'a> {
 #[cfg(test)]
 mod tests {
     use std::prelude::*;
-    use std::iter::range_step;
     use std::uint;
     use std::rand;
     use std::rand::Rng;
@@ -2033,14 +2046,12 @@ mod tests {
 
     #[test]
     fn test_bitv_iterator() {
-        let bools = vec![true, false, true, true];
+        let bools = [true, false, true, true];
         let bitv: Bitv = bools.iter().map(|n| *n).collect();
 
-        assert_eq!(bitv.iter().collect::<Vec<bool>>(), bools)
-
-        let long = Vec::from_fn(10000, |i| i % 2 == 0);
-        let bitv: Bitv = long.iter().map(|n| *n).collect();
-        assert_eq!(bitv.iter().collect::<Vec<bool>>(), long)
+        for (act, &ex) in bitv.iter().zip(bools.iter()) {
+            assert_eq!(ex, act);
+        }
     }
 
     #[test]
@@ -2050,12 +2061,6 @@ mod tests {
 
         let idxs: Vec<uint> = bitv.iter().collect();
         assert_eq!(idxs, vec!(0, 2, 3));
-
-        let long: BitvSet = range(0u, 10000).map(|n| n % 2 == 0).collect();
-        let real = range_step(0, 10000, 2).collect::<Vec<uint>>();
-
-        let idxs: Vec<uint> = long.iter().collect();
-        assert_eq!(idxs, real);
     }
 
     #[test]
@@ -2569,7 +2574,7 @@ mod tests {
     }
 
     #[bench]
-    fn bench_bitv_set_big_fixed(b: &mut Bencher) {
+    fn bench_bitv_big(b: &mut Bencher) {
         let mut r = rng();
         let mut bitv = Bitv::with_capacity(BENCH_BITS, false);
         b.iter(|| {
@@ -2581,19 +2586,7 @@ mod tests {
     }
 
     #[bench]
-    fn bench_bitv_set_big_variable(b: &mut Bencher) {
-        let mut r = rng();
-        let mut bitv = Bitv::with_capacity(BENCH_BITS, false);
-        b.iter(|| {
-            for i in range(0u, 100) {
-                bitv.set((r.next_u32() as uint) % BENCH_BITS, r.gen());
-            }
-            &bitv
-        })
-    }
-
-    #[bench]
-    fn bench_bitv_set_small(b: &mut Bencher) {
+    fn bench_bitv_small(b: &mut Bencher) {
         let mut r = rng();
         let mut bitv = Bitv::with_capacity(uint::BITS, false);
         b.iter(|| {
@@ -2605,7 +2598,7 @@ mod tests {
     }
 
     #[bench]
-    fn bench_bitvset_small(b: &mut Bencher) {
+    fn bench_bitv_set_small(b: &mut Bencher) {
         let mut r = rng();
         let mut bitv = BitvSet::new();
         b.iter(|| {
@@ -2617,7 +2610,7 @@ mod tests {
     }
 
     #[bench]
-    fn bench_bitvset_big(b: &mut Bencher) {
+    fn bench_bitv_set_big(b: &mut Bencher) {
         let mut r = rng();
         let mut bitv = BitvSet::new();
         b.iter(|| {

branches/try2/src/libcollections/dlist.rs

@@ -90,7 +90,7 @@ impl<T> Rawlink<T> {
     /// Convert the `Rawlink` into an Option value
     fn resolve_immut<'a>(&self) -> Option<&'a T> {
         unsafe {
-            self.p.as_ref()
+            mem::transmute(self.p.to_option())
         }
     }
 

branches/try2/src/libcore/failure.rs

@@ -55,11 +55,6 @@ fn fail_bounds_check(file_line: &(&'static str, uint),
     unsafe { intrinsics::abort() }
 }
 
-#[cold] #[inline(never)]
-pub fn begin_unwind_string(msg: &str, file: &(&'static str, uint)) -> ! {
-    format_args!(|fmt| begin_unwind(fmt, file), "{}", msg)
-}
-
 #[cold] #[inline(never)]
 pub fn begin_unwind(fmt: &fmt::Arguments, file_line: &(&'static str, uint)) -> ! {
     #[allow(ctypes)]

branches/try2/src/libcore/macros.rs

@@ -16,10 +16,9 @@ macro_rules! fail(
     () => (
         fail!("{}", "explicit failure")
     );
-    ($msg:expr) => ({
-        static _FILE_LINE: (&'static str, uint) = (file!(), line!());
-        ::core::failure::begin_unwind_string($msg, &_FILE_LINE)
-    });
+    ($msg:expr) => (
+        fail!("{}", $msg)
+    );
     ($fmt:expr, $($arg:tt)*) => ({
         // a closure can't have return type !, so we need a full
         // function to pass to format_args!, *and* we need the

branches/try2/src/libcore/ptr.rs

@@ -256,46 +256,27 @@ pub unsafe fn position<T>(buf: *const T, f: |&T| -> bool) -> uint {
 pub trait RawPtr<T> {
     /// Returns the null pointer.
     fn null() -> Self;
-
     /// Returns true if the pointer is equal to the null pointer.
     fn is_null(&self) -> bool;
-
     /// Returns true if the pointer is not equal to the null pointer.
     fn is_not_null(&self) -> bool { !self.is_null() }
-
     /// Returns the value of this pointer (ie, the address it points to)
     fn to_uint(&self) -> uint;
-
-    /// Returns `None` if the pointer is null, or else returns a reference to the
-    /// value wrapped in `Some`.
+    /// Returns `None` if the pointer is null, or else returns the value wrapped
+    /// in `Some`.
     ///
     /// # Safety Notes
     ///
-    /// While this method and its mutable counterpart are useful for null-safety,
-    /// it is important to note that this is still an unsafe operation because
-    /// the returned value could be pointing to invalid memory.
-    unsafe fn as_ref<'a>(&self) -> Option<&'a T>;
-
-    /// A synonym for `as_ref`, except with incorrect lifetime semantics
-    #[deprecated="Use `as_ref` instead"]
-    unsafe fn to_option<'a>(&'a self) -> Option<&'a T> {
-        mem::transmute(self.as_ref())
-    }
-
+    /// While this method is useful for null-safety, it is important to note
+    /// that this is still an unsafe operation because the returned value could
+    /// be pointing to invalid memory.
+    unsafe fn to_option(&self) -> Option<&T>;
     /// Calculates the offset from a pointer. The offset *must* be in-bounds of
     /// the object, or one-byte-past-the-end.  `count` is in units of T; e.g. a
     /// `count` of 3 represents a pointer offset of `3 * sizeof::<T>()` bytes.
     unsafe fn offset(self, count: int) -> Self;
 }
 
-/// Methods on mutable raw pointers
-pub trait RawMutPtr<T>{
-    /// Returns `None` if the pointer is null, or else returns a mutable reference
-    /// to the value wrapped in `Some`. As with `as_ref`, this is unsafe because
-    /// it cannot verify the validity of the returned pointer.
-    unsafe fn as_mut<'a>(&self) -> Option<&'a mut T>;
-}
-
 impl<T> RawPtr<T> for *const T {
     #[inline]
     fn null() -> *const T { null() }
@@ -312,7 +293,7 @@ impl<T> RawPtr<T> for *const T {
     }
 
     #[inline]
-    unsafe fn as_ref<'a>(&self) -> Option<&'a T> {
+    unsafe fn to_option(&self) -> Option<&T> {
         if self.is_null() {
             None
         } else {
@@ -337,7 +318,7 @@ impl<T> RawPtr<T> for *mut T {
     }
 
     #[inline]
-    unsafe fn as_ref<'a>(&self) -> Option<&'a T> {
+    unsafe fn to_option(&self) -> Option<&T> {
         if self.is_null() {
             None
         } else {
@@ -346,17 +327,6 @@ impl<T> RawPtr<T> for *mut T {
     }
 }
 
-impl<T> RawMutPtr<T> for *mut T {
-    #[inline]
-    unsafe fn as_mut<'a>(&self) -> Option<&'a mut T> {
-        if self.is_null() {
-            None
-        } else {
-            Some(&mut **self)
-        }
-    }
-}
-
 // Equality for pointers
 impl<T> PartialEq for *const T {
     #[inline]

branches/try2/src/libcore/slice.rs

@@ -996,15 +996,6 @@ impl<'a, T> Collection for &'a [T] {
     }
 }
 
-#[experimental = "trait is experimental"]
-impl<'a, T> Collection for &'a mut [T] {
-    /// Returns the length of a vector
-    #[inline]
-    fn len(&self) -> uint {
-        self.repr().len
-    }
-}
-
 #[unstable = "waiting for DST"]
 impl<'a, T> Default for &'a [T] {
     fn default() -> &'a [T] { &[] }