auto merge of #7334 : thestinger/rust/old_iter, r=Aatch

the `test/run-pass/class-trait-bounded-param.rs` test was xfailed and
written in an ancient dialect of Rust so I've just removed it

this also removes `to_vec` from DList because it's provided by
`std::iter::to_vec`

an Iterator implementation is added for OptVec but some transitional
internal iterator methods are still left

Author: bors

src/libextra/bitv.rs

@@ -666,12 +666,8 @@ impl BitvSet {
     pub fn symmetric_difference_with(&mut self, other: &BitvSet) {
         self.other_op(other, |w1, w2| w1 ^ w2);
     }
-}
-
-impl BaseIter<uint> for BitvSet {
-    fn size_hint(&self) -> Option<uint> { Some(self.len()) }
 
-    fn each(&self, blk: &fn(v: &uint) -> bool) -> bool {
+    pub fn each(&self, blk: &fn(v: &uint) -> bool) -> bool {
         for self.bitv.storage.iter().enumerate().advance |(i, &w)| {
             if !iterate_bits(i * uint::bits, w, |b| blk(&b)) {
                 return false;

src/libextra/dlist.rs

@@ -21,8 +21,6 @@ Do not use ==, !=, <, etc on doubly-linked lists -- it may not terminate.
 use core::prelude::*;
 
 use core::managed;
-use core::old_iter;
-use core::vec;
 
 pub type DListLink<T> = Option<@mut DListNode<T>>;
 
@@ -213,6 +211,42 @@ impl<T> DList<T> {
 }
 
 impl<T> DList<T> {
+    /**
+     * Iterates through the current contents.
+     *
+     * Attempts to access this dlist during iteration are allowed (to
+     * allow for e.g. breadth-first search with in-place enqueues), but
+     * removing the current node is forbidden.
+     */
+    pub fn each(@mut self, f: &fn(v: &T) -> bool) -> bool {
+        let mut link = self.peek_n();
+        while link.is_some() {
+            let nobe = link.get();
+            assert!(nobe.linked);
+
+            {
+                let frozen_nobe = &*nobe;
+                if !f(&frozen_nobe.data) { return false; }
+            }
+
+            // Check (weakly) that the user didn't do a remove.
+            if self.size == 0 {
+                fail!("The dlist became empty during iteration??")
+            }
+            if !nobe.linked ||
+                (!((nobe.prev.is_some()
+                    || managed::mut_ptr_eq(self.hd.expect("headless dlist?"),
+                                           nobe))
+                   && (nobe.next.is_some()
+                    || managed::mut_ptr_eq(self.tl.expect("tailless dlist?"),
+                                           nobe)))) {
+                fail!("Removing a dlist node during iteration is forbidden!")
+            }
+            link = nobe.next_link();
+        }
+        return true;
+    }
+
     /// Get the size of the list. O(1).
     pub fn len(@mut self) -> uint { self.size }
     /// Returns true if the list is empty. O(1).
@@ -484,56 +518,6 @@ impl<T:Copy> DList<T> {
 
     /// Get data at the list's tail, failing if empty. O(1).
     pub fn tail(@mut self) -> T { copy self.tail_n().data }
-
-    /// Get the elements of the list as a vector. O(n).
-    pub fn to_vec(@mut self) -> ~[T] {
-        let mut v = vec::with_capacity(self.size);
-        for old_iter::eachi(&self) |index,data| {
-            v[index] = copy *data;
-        }
-        v
-    }
-}
-
-impl<T> BaseIter<T> for @mut DList<T> {
-    /**
-     * Iterates through the current contents.
-     *
-     * Attempts to access this dlist during iteration are allowed (to
-     * allow for e.g. breadth-first search with in-place enqueues), but
-     * removing the current node is forbidden.
-     */
-    fn each(&self, f: &fn(v: &T) -> bool) -> bool {
-        let mut link = self.peek_n();
-        while link.is_some() {
-            let nobe = link.get();
-            assert!(nobe.linked);
-
-            {
-                let frozen_nobe = &*nobe;
-                if !f(&frozen_nobe.data) { return false; }
-            }
-
-            // Check (weakly) that the user didn't do a remove.
-            if self.size == 0 {
-                fail!("The dlist became empty during iteration??")
-            }
-            if !nobe.linked ||
-                (!((nobe.prev.is_some()
-                    || managed::mut_ptr_eq(self.hd.expect("headless dlist?"),
-                                           nobe))
-                   && (nobe.next.is_some()
-                    || managed::mut_ptr_eq(self.tl.expect("tailless dlist?"),
-                                           nobe)))) {
-                fail!("Removing a dlist node during iteration is forbidden!")
-            }
-            link = nobe.next_link();
-        }
-        return true;
-    }
-
-    #[inline]
-    fn size_hint(&self) -> Option<uint> { Some(self.len()) }
 }
 
 #[cfg(test)]
@@ -542,7 +526,6 @@ mod tests {
 
     use super::*;
 
-    use core::old_iter;
     use core::vec;
 
     #[test]
@@ -759,11 +742,6 @@ mod tests {
         assert_eq!(l.len(), 3);
     }
     #[test]
-    fn test_dlist_foldl() {
-        let l = from_vec(vec::from_fn(101, |x|x));
-        assert_eq!(old_iter::foldl(&l, 0, |accum,elem| *accum+*elem), 5050);
-    }
-    #[test]
     fn test_dlist_break_early() {
         let l = from_vec([1,2,3,4,5]);
         let mut x = 0;

src/libextra/priority_queue.rs

@@ -14,25 +14,15 @@
 
 use core::prelude::*;
 
-use core::old_iter::BaseIter;
 use core::unstable::intrinsics::{move_val_init, init};
 use core::util::{replace, swap};
 use core::vec;
 
-#[allow(missing_doc)]
+/// A priority queue implemented with a binary heap
 pub struct PriorityQueue<T> {
     priv data: ~[T],
 }
 
-impl<T:Ord> BaseIter<T> for PriorityQueue<T> {
-    /// Visit all values in the underlying vector.
-    ///
-    /// The values are **not** visited in order.
-    fn each(&self, f: &fn(&T) -> bool) -> bool { self.data.iter().advance(f) }
-
-    fn size_hint(&self) -> Option<uint> { Some(self.data.len()) }
-}
-
 impl<T:Ord> Container for PriorityQueue<T> {
     /// Returns the length of the queue
     fn len(&self) -> uint { self.data.len() }
@@ -47,6 +37,11 @@ impl<T:Ord> Mutable for PriorityQueue<T> {
 }
 
 impl<T:Ord> PriorityQueue<T> {
+    /// Visit all values in the underlying vector.
+    ///
+    /// The values are **not** visited in order.
+    pub fn each(&self, f: &fn(&T) -> bool) -> bool { self.data.iter().advance(f) }
+
     /// Returns the greatest item in the queue - fails if empty
     pub fn top<'a>(&'a self) -> &'a T { &self.data[0] }
 

src/libextra/smallintmap.rs

@@ -19,8 +19,6 @@ use core::prelude::*;
 
 use core::cmp;
 use core::container::{Container, Mutable, Map, Set};
-use core::old_iter::BaseIter;
-use core::old_iter;
 use core::uint;
 use core::util::replace;
 use core::vec;
@@ -212,12 +210,6 @@ impl Mutable for SmallIntSet {
     fn clear(&mut self) { self.map.clear() }
 }
 
-impl BaseIter<uint> for SmallIntSet {
-    /// Visit all values in order
-    fn each(&self, f: &fn(&uint) -> bool) -> bool { self.map.each_key(f) }
-    fn size_hint(&self) -> Option<uint> { Some(self.len()) }
-}
-
 impl Set<uint> for SmallIntSet {
     /// Return true if the set contains a value
     fn contains(&self, value: &uint) -> bool { self.map.contains_key(value) }
@@ -233,12 +225,14 @@ impl Set<uint> for SmallIntSet {
     /// Return true if the set has no elements in common with `other`.
     /// This is equivalent to checking for an empty uintersection.
     fn is_disjoint(&self, other: &SmallIntSet) -> bool {
-        old_iter::all(self, |v| !other.contains(v))
+        for self.each |v| { if other.contains(v) { return false } }
+        true
     }
 
     /// Return true if the set is a subset of another
     fn is_subset(&self, other: &SmallIntSet) -> bool {
-        old_iter::all(self, |v| other.contains(v))
+        for self.each |v| { if !other.contains(v) { return false } }
+        true
     }
 
     /// Return true if the set is a superset of another
@@ -286,6 +280,9 @@ impl Set<uint> for SmallIntSet {
 impl SmallIntSet {
     /// Create an empty SmallIntSet
     pub fn new() -> SmallIntSet { SmallIntSet{map: SmallIntMap::new()} }
+
+    /// Visit all values in order
+    pub fn each(&self, f: &fn(&uint) -> bool) -> bool { self.map.each_key(f) }
 }
 
 #[cfg(test)]

src/libextra/treemap.rs

@@ -249,22 +249,6 @@ pub struct TreeSet<T> {
     priv map: TreeMap<T, ()>
 }
 
-impl<T: TotalOrd> BaseIter<T> for TreeSet<T> {
-    /// Visit all values in order
-    #[inline]
-    fn each(&self, f: &fn(&T) -> bool) -> bool { self.map.each_key(f) }
-    #[inline]
-    fn size_hint(&self) -> Option<uint> { Some(self.len()) }
-}
-
-impl<T: TotalOrd> ReverseIter<T> for TreeSet<T> {
-    /// Visit all values in reverse order
-    #[inline]
-    fn each_reverse(&self, f: &fn(&T) -> bool) -> bool {
-        self.map.each_key_reverse(f)
-    }
-}
-
 impl<T: Eq + TotalOrd> Eq for TreeSet<T> {
     #[inline]
     fn eq(&self, other: &TreeSet<T>) -> bool { self.map == other.map }
@@ -499,6 +483,16 @@ impl<T: TotalOrd> TreeSet<T> {
     pub fn iter<'a>(&'a self) -> TreeSetIterator<'a, T> {
         TreeSetIterator{iter: self.map.iter()}
     }
+
+    /// Visit all values in order
+    #[inline]
+    pub fn each(&self, f: &fn(&T) -> bool) -> bool { self.map.each_key(f) }
+
+    /// Visit all values in reverse order
+    #[inline]
+    pub fn each_reverse(&self, f: &fn(&T) -> bool) -> bool {
+        self.map.each_key_reverse(f)
+    }
 }
 
 /// Lazy forward iterator over a set

src/librustc/metadata/encoder.rs

@@ -731,8 +731,8 @@ fn encode_info_for_method(ecx: &EncodeContext,
     }
 
     let mut combined_ty_params = opt_vec::Empty;
-    combined_ty_params.push_all(&owner_generics.ty_params);
-    combined_ty_params.push_all(&method_generics.ty_params);
+    for owner_generics.ty_params.each |x| { combined_ty_params.push(copy *x) }
+    for method_generics.ty_params.each |x| { combined_ty_params.push(copy *x) }
     let len = combined_ty_params.len();
     encode_type_param_bounds(ebml_w, ecx, &combined_ty_params);
 

src/librustc/middle/borrowck/move_data.rs

@@ -507,7 +507,7 @@ impl FlowedMoveData {
         for self.dfcx_moves.each_bit_on_entry_frozen(id) |index| {
             let move = &self.move_data.moves[index];
             let moved_path = move.path;
-            if base_indices.contains(&moved_path) {
+            if base_indices.iter().any_(|x| x == &moved_path) {
                 // Scenario 1 or 2: `loan_path` or some base path of
                 // `loan_path` was moved.
                 if !f(move, self.move_data.path(moved_path).loan_path) {
@@ -536,7 +536,7 @@ impl FlowedMoveData {
                        -> bool {
         //! True if `id` is the id of the LHS of an assignment
 
-        self.move_data.assignee_ids.contains(&id)
+        self.move_data.assignee_ids.iter().any_(|x| x == &id)
     }
 
     pub fn each_assignment_of(&self,

src/librustc/middle/resolve.rs

@@ -3710,7 +3710,7 @@ impl Resolver {
                 let function_type_rib = @Rib(rib_kind);
                 self.type_ribs.push(function_type_rib);
 
-                for generics.ty_params.eachi |index, type_parameter| {
+                for generics.ty_params.iter().enumerate().advance |(index, type_parameter)| {
                     let name = type_parameter.ident;
                     debug!("with_type_parameter_rib: %d %d", node_id,
                            type_parameter.id);

src/libstd/at_vec.rs

@@ -14,7 +14,6 @@ use cast::transmute;
 use container::Container;
 use iterator::IteratorUtil;
 use kinds::Copy;
-use old_iter;
 use option::Option;
 use sys;
 use uint;
@@ -129,7 +128,7 @@ pub fn map<T, U>(v: &[T], f: &fn(x: &T) -> U) -> @[U] {
  * Creates an immutable vector of size `n_elts` and initializes the elements
  * to the value returned by the function `op`.
  */
-pub fn from_fn<T>(n_elts: uint, op: old_iter::InitOp<T>) -> @[T] {
+pub fn from_fn<T>(n_elts: uint, op: &fn(uint) -> T) -> @[T] {
     do build_sized(n_elts) |push| {
         let mut i: uint = 0u;
         while i < n_elts { push(op(i)); i += 1u; }

src/libstd/clone.rs

@@ -56,6 +56,18 @@ impl<'self, T> Clone for &'self T {
     fn clone(&self) -> &'self T { *self }
 }
 
+impl<'self, T> Clone for &'self [T] {
+    /// Return a shallow copy of the slice.
+    #[inline]
+    fn clone(&self) -> &'self [T] { *self }
+}
+
+impl<'self> Clone for &'self str {
+    /// Return a shallow copy of the slice.
+    #[inline]
+    fn clone(&self) -> &'self str { *self }
+}
+
 macro_rules! clone_impl(
     ($t:ty) => {
         impl Clone for $t {