auto merge of #18492 : alexcrichton/rust/rollup, r=alexcrichton

mini rollup!

Author: bors

src/compiletest/runtest.rs

@@ -616,7 +616,7 @@ fn find_rust_src_root(config: &Config) -> Option<Path> {
     let path_postfix = Path::new("src/etc/lldb_batchmode.py");
 
     while path.pop() {
-        if path.join(path_postfix.clone()).is_file() {
+        if path.join(&path_postfix).is_file() {
             return Some(path);
         }
     }

src/libcollections/bench.rs

@@ -0,0 +1,88 @@
+// Copyright 2013-2014 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.
+
+use std::prelude::*;
+use std::rand;
+use std::rand::Rng;
+use test::Bencher;
+
+pub fn insert_rand_n<M>(n: uint, map: &mut M, b: &mut Bencher,
+                        insert: |&mut M, uint|,
+                        remove: |&mut M, uint|) {
+    // setup
+    let mut rng = rand::weak_rng();
+
+    for _ in range(0, n) {
+        insert(map, rng.gen::<uint>() % n);
+    }
+
+    // measure
+    b.iter(|| {
+        let k = rng.gen::<uint>() % n;
+        insert(map, k);
+        remove(map, k);
+    })
+}
+
+pub fn insert_seq_n<M>(n: uint, map: &mut M, b: &mut Bencher,
+                       insert: |&mut M, uint|,
+                       remove: |&mut M, uint|) {
+    // setup
+    for i in range(0u, n) {
+        insert(map, i * 2);
+    }
+
+    // measure
+    let mut i = 1;
+    b.iter(|| {
+        insert(map, i);
+        remove(map, i);
+        i = (i + 2) % n;
+    })
+}
+
+pub fn find_rand_n<M, T>(n: uint, map: &mut M, b: &mut Bencher,
+                         insert: |&mut M, uint|,
+                         find: |&M, uint| -> T) {
+    // setup
+    let mut rng = rand::weak_rng();
+    let mut keys = Vec::from_fn(n, |_| rng.gen::<uint>() % n);
+
+    for k in keys.iter() {
+        insert(map, *k);
+    }
+
+    rng.shuffle(keys.as_mut_slice());
+
+    // measure
+    let mut i = 0;
+    b.iter(|| {
+        let t = find(map, keys[i]);
+        i = (i + 1) % n;
+        t
+    })
+}
+
+pub fn find_seq_n<M, T>(n: uint, map: &mut M, b: &mut Bencher,
+                        insert: |&mut M, uint|,
+                        find: |&M, uint| -> T) {
+    // setup
+    for i in range(0u, n) {
+        insert(map, i);
+    }
+
+    // measure
+    let mut i = 0;
+    b.iter(|| {
+        let x = find(map, i);
+        i = (i + 1) % n;
+        x
+    })
+}

src/libcollections/bitv.rs

@@ -70,7 +70,6 @@ use core::slice;
 use core::u32;
 use std::hash;
 
-use {Mutable, Set, MutableSet, MutableSeq};
 use vec::Vec;
 
 type MatchWords<'a> = Chain<MaskWords<'a>, Skip<Take<Enumerate<Repeat<u32>>>>>;
@@ -755,6 +754,20 @@ impl Bitv {
         }
         self.set(insert_pos, elem);
     }
+
+    /// Return the total number of bits in this vector
+    #[inline]
+    pub fn len(&self) -> uint { self.nbits }
+
+    /// Returns true if there are no bits in this vector
+    #[inline]
+    pub fn is_empty(&self) -> bool { self.len() == 0 }
+
+    /// Clears all bits in this vector.
+    #[inline]
+    pub fn clear(&mut self) {
+        for w in self.storage.iter_mut() { *w = 0u32; }
+    }
 }
 
 /// Transforms a byte-vector into a `Bitv`. Each byte becomes eight bits,
@@ -804,18 +817,6 @@ impl Default for Bitv {
     fn default() -> Bitv { Bitv::new() }
 }
 
-impl Collection for Bitv {
-    #[inline]
-    fn len(&self) -> uint { self.nbits }
-}
-
-impl Mutable for Bitv {
-    #[inline]
-    fn clear(&mut self) {
-        for w in self.storage.iter_mut() { *w = 0u32; }
-    }
-}
-
 impl FromIterator<bool> for Bitv {
     fn from_iter<I:Iterator<bool>>(iterator: I) -> Bitv {
         let mut ret = Bitv::new();
@@ -1466,61 +1467,45 @@ impl BitvSet {
     pub fn symmetric_difference_with(&mut self, other: &BitvSet) {
         self.other_op(other, |w1, w2| w1 ^ w2);
     }
-}
-
-impl fmt::Show for BitvSet {
-    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        try!(write!(fmt, "{{"));
-        let mut first = true;
-        for n in self.iter() {
-            if !first {
-                try!(write!(fmt, ", "));
-            }
-            try!(write!(fmt, "{}", n));
-            first = false;
-        }
-        write!(fmt, "}}")
-    }
-}
 
-impl<S: hash::Writer> hash::Hash<S> for BitvSet {
-    fn hash(&self, state: &mut S) {
-        for pos in self.iter() {
-            pos.hash(state);
-        }
+    /// Return the number of set bits in this set.
+    #[inline]
+    pub fn len(&self) -> uint  {
+        let &BitvSet(ref bitv) = self;
+        bitv.storage.iter().fold(0, |acc, &n| acc + n.count_ones())
     }
-}
 
-impl Collection for BitvSet {
+    /// Returns whether there are no bits set in this set
     #[inline]
-    fn len(&self) -> uint  {
+    pub fn is_empty(&self) -> bool {
         let &BitvSet(ref bitv) = self;
-        bitv.storage.iter().fold(0, |acc, &n| acc + n.count_ones())
+        bitv.storage.iter().all(|&n| n == 0)
     }
-}
 
-impl Mutable for BitvSet {
+    /// Clears all bits in this set
     #[inline]
-    fn clear(&mut self) {
+    pub fn clear(&mut self) {
         let &BitvSet(ref mut bitv) = self;
         bitv.clear();
     }
-}
 
-impl Set<uint> for BitvSet {
+    /// Returns `true` if this set contains the specified integer.
     #[inline]
-    fn contains(&self, value: &uint) -> bool {
+    pub fn contains(&self, value: &uint) -> bool {
         let &BitvSet(ref bitv) = self;
         *value < bitv.nbits && bitv.get(*value)
     }
 
+    /// Returns `true` if the set has no elements in common with `other`.
+    /// This is equivalent to checking for an empty intersection.
     #[inline]
-    fn is_disjoint(&self, other: &BitvSet) -> bool {
+    pub fn is_disjoint(&self, other: &BitvSet) -> bool {
         self.intersection(other).next().is_none()
     }
 
+    /// Returns `true` if the set is a subset of another.
     #[inline]
-    fn is_subset(&self, other: &BitvSet) -> bool {
+    pub fn is_subset(&self, other: &BitvSet) -> bool {
         let &BitvSet(ref self_bitv) = self;
         let &BitvSet(ref other_bitv) = other;
 
@@ -1531,14 +1516,15 @@ impl Set<uint> for BitvSet {
         self_bitv.mask_words(other_bitv.storage.len()).all(|(_, w)| w == 0)
     }
 
+    /// Returns `true` if the set is a superset of another.
     #[inline]
-    fn is_superset(&self, other: &BitvSet) -> bool {
+    pub fn is_superset(&self, other: &BitvSet) -> bool {
         other.is_subset(self)
     }
-}
 
-impl MutableSet<uint> for BitvSet {
-    fn insert(&mut self, value: uint) -> bool {
+    /// Adds a value to the set. Returns `true` if the value was not already
+    /// present in the set.
+    pub fn insert(&mut self, value: uint) -> bool {
         if self.contains(&value) {
             return false;
         }
@@ -1554,7 +1540,9 @@ impl MutableSet<uint> for BitvSet {
         return true;
     }
 
-    fn remove(&mut self, value: &uint) -> bool {
+    /// Removes a value from the set. Returns `true` if the value was
+    /// present in the set.
+    pub fn remove(&mut self, value: &uint) -> bool {
         if !self.contains(value) {
             return false;
         }
@@ -1564,6 +1552,29 @@ impl MutableSet<uint> for BitvSet {
     }
 }
 
+impl fmt::Show for BitvSet {
+    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
+        try!(write!(fmt, "{{"));
+        let mut first = true;
+        for n in self.iter() {
+            if !first {
+                try!(write!(fmt, ", "));
+            }
+            try!(write!(fmt, "{}", n));
+            first = false;
+        }
+        write!(fmt, "}}")
+    }
+}
+
+impl<S: hash::Writer> hash::Hash<S> for BitvSet {
+    fn hash(&self, state: &mut S) {
+        for pos in self.iter() {
+            pos.hash(state);
+        }
+    }
+}
+
 /// An iterator for `BitvSet`.
 pub struct BitPositions<'a> {
     set: &'a BitvSet,
@@ -1643,7 +1654,6 @@ mod tests {
     use std::rand::Rng;
     use test::Bencher;
 
-    use {Set, Mutable, MutableSet, MutableSeq};
     use bitv::{Bitv, BitvSet, from_fn, from_bytes};
     use bitv;
     use vec::Vec;