collections: remove List

It was decided in a meeting that this module wasn't needed,
and more thought should be put into a persistent collections
library.

2 files changed, 0 insertions, 239 deletions

diff --git a/src/libcollections/lib.rs b/src/libcollections/lib.rs
index fba85b05231..2ffc1d2fddc 100644
--- a/src/libcollections/lib.rs
+++ b/src/libcollections/lib.rs
@@ -33,7 +33,6 @@ pub use deque::Deque;
 pub use dlist::DList;
 pub use enum_set::EnumSet;
 pub use hashmap::{HashMap, HashSet};
-pub use list::List;
 pub use lru_cache::LruCache;
 pub use priority_queue::PriorityQueue;
 pub use ringbuf::RingBuf;
@@ -47,7 +46,6 @@ pub mod deque;
 pub mod dlist;
 pub mod enum_set;
 pub mod hashmap;
-pub mod list;
 pub mod lru_cache;
 pub mod priority_queue;
 pub mod ringbuf;
diff --git a/src/libcollections/list.rs b/src/libcollections/list.rs
deleted file mode 100644
index 18da9671419..00000000000
--- a/src/libcollections/list.rs
+++ /dev/null
@@ -1,237 +0,0 @@
-// Copyright 2012 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.
-
-//! A standard, garbage-collected linked list.
-
-use std::container::Container;
-
-#[deriving(Clone, Eq)]
-#[allow(missing_doc)]
-pub enum List<T> {
-    Cons(T, @List<T>),
-    Nil,
-}
-
-pub struct Items<'a, T> {
-    priv head: &'a List<T>,
-    priv next: Option<&'a @List<T>>
-}
-
-impl<'a, T> Iterator<&'a T> for Items<'a, T> {
-    fn next(&mut self) -> Option<&'a T> {
-        match self.next {
-            None => match *self.head {
-                Nil => None,
-                Cons(ref value, ref tail) => {
-                    self.next = Some(tail);
-                    Some(value)
-                }
-            },
-            Some(next) => match **next {
-                Nil => None,
-                Cons(ref value, ref tail) => {
-                    self.next = Some(tail);
-                    Some(value)
-                }
-            }
-        }
-    }
-}
-
-impl<T> List<T> {
-    /// Returns a forward iterator
-    pub fn iter<'a>(&'a self) -> Items<'a, T> {
-        Items {
-            head: self,
-            next: None
-        }
-    }
-
-    /// Returns the first element of a list
-    pub fn head<'a>(&'a self) -> Option<&'a T> {
-        match *self {
-          Nil => None,
-          Cons(ref head, _) => Some(head)
-        }
-    }
-
-    /// Returns all but the first element of a list
-    pub fn tail(&self) -> Option<@List<T>> {
-        match *self {
-            Nil => None,
-            Cons(_, tail) => Some(tail)
-        }
-    }
-}
-
-impl<T> Container for List<T> {
-    /// Returns the length of a list
-    fn len(&self) -> uint { self.iter().len() }
-
-    /// Returns true if the list is empty
-    fn is_empty(&self) -> bool { match *self { Nil => true, _ => false } }
-}
-
-impl<T:Eq> List<T> {
-    /// Returns true if a list contains an element with the given value
-    pub fn contains(&self, element: T) -> bool {
-        self.iter().any(|list_element| *list_element == element)
-    }
-}
-
-impl<T:'static + Clone> List<T> {
-    /// Create a list from a vector
-    pub fn from_vec(v: &[T]) -> List<T> {
-        match v.len() {
-            0 => Nil,
-            _ => v.rev_iter().fold(Nil, |tail, value: &T| Cons(value.clone(), @tail))
-        }
-    }
-
-    /// Appends one list to another, returning a new list
-    pub fn append(&self, other: List<T>) -> List<T> {
-        match other {
-            Nil => return self.clone(),
-            _ => match *self {
-                Nil => return other,
-                Cons(ref value, tail) => Cons(value.clone(), @tail.append(other))
-            }
-        }
-    }
-
-    /// Push one element into the front of a list, returning a new list
-    pub fn unshift(&self, element: T) -> List<T> {
-        Cons(element, @(self.clone()))
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use list::{List, Nil};
-    use list;
-
-    #[test]
-    fn test_iter() {
-        let list = List::from_vec([0, 1, 2]);
-        let mut iter = list.iter();
-        assert_eq!(&0, iter.next().unwrap());
-        assert_eq!(&1, iter.next().unwrap());
-        assert_eq!(&2, iter.next().unwrap());
-        assert_eq!(None, iter.next());
-    }
-
-    #[test]
-    fn test_is_empty() {
-        let empty : list::List<int> = List::from_vec([]);
-        let full1 = List::from_vec([1]);
-        let full2 = List::from_vec(['r', 'u']);
-
-        assert!(empty.is_empty());
-        assert!(!full1.is_empty());
-        assert!(!full2.is_empty());
-    }
-
-    #[test]
-    fn test_from_vec() {
-        let list = List::from_vec([0, 1, 2]);
-        assert_eq!(list.head().unwrap(), &0);
-
-        let mut tail = list.tail().unwrap();
-        assert_eq!(tail.head().unwrap(), &1);
-
-        tail = tail.tail().unwrap();
-        assert_eq!(tail.head().unwrap(), &2);
-    }
-
-    #[test]
-    fn test_from_vec_empty() {
-        let empty : list::List<int> = List::from_vec([]);
-        assert!(empty == Nil::<int>);
-    }
-
-    #[test]
-    fn test_fold() {
-        fn add_(a: uint, b: &uint) -> uint { a + *b }
-        fn subtract_(a: uint, b: &uint) -> uint { a - *b }
-
-        let empty = Nil::<uint>;
-        assert_eq!(empty.iter().fold(0u, add_), 0u);
-        assert_eq!(empty.iter().fold(10u, subtract_), 10u);
-
-        let list = List::from_vec([0u, 1u, 2u, 3u, 4u]);
-        assert_eq!(list.iter().fold(0u, add_), 10u);
-        assert_eq!(list.iter().fold(10u, subtract_), 0u);
-    }
-
-    #[test]
-    fn test_find_success() {
-        fn match_(i: & &int) -> bool { **i == 2 }
-
-        let list = List::from_vec([0, 1, 2]);
-        assert_eq!(list.iter().find(match_).unwrap(), &2);
-    }
-
-    #[test]
-    fn test_find_fail() {
-        fn match_(_i: & &int) -> bool { false }
-
-        let empty = Nil::<int>;
-        assert_eq!(empty.iter().find(match_), None);
-
-        let list = List::from_vec([0, 1, 2]);
-        assert_eq!(list.iter().find(match_), None);
-    }
-
-    #[test]
-    fn test_any() {
-        fn match_(i: &int) -> bool { *i == 2 }
-
-        let empty = Nil::<int>;
-        assert_eq!(empty.iter().any(match_), false);
-
-        let list = List::from_vec([0, 1, 2]);
-        assert_eq!(list.iter().any(match_), true);
-    }
-
-    #[test]
-    fn test_contains() {
-        let empty = Nil::<int>;
-        assert!((!empty.contains(5)));
-
-        let list = List::from_vec([5, 8, 6]);
-        assert!((list.contains(5)));
-        assert!((!list.contains(7)));
-        assert!((list.contains(8)));
-    }
-
-    #[test]
-    fn test_len() {
-        let empty = Nil::<int>;
-        assert_eq!(empty.len(), 0u);
-
-        let list = List::from_vec([0, 1, 2]);
-        assert_eq!(list.len(), 3u);
-    }
-
-    #[test]
-    fn test_append() {
-        assert!(List::from_vec([1, 2, 3, 4]) ==
-                List::from_vec([1, 2]).append(List::from_vec([3, 4])));
-    }
-
-    #[test]
-    fn test_unshift() {
-        let list = List::from_vec([1]);
-        let new_list = list.unshift(0);
-        assert_eq!(list.len(), 1u);
-        assert_eq!(new_list.len(), 2u);
-        assert!(new_list == List::from_vec([0, 1]));
-    }
-}