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// Copyright 2013 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.
//! Container traits
use option::Option;
pub trait Container {
/// Return the number of elements in the container
fn len(&const self) -> uint;
/// Return true if the container contains no elements
fn is_empty(&const self) -> bool;
}
pub trait Mutable: Container {
/// Clear the container, removing all values.
fn clear(&mut self);
}
pub trait Map<K, V>: Mutable {
/// Return true if the map contains a value for the specified key
fn contains_key(&self, key: &K) -> bool;
/// Visit all keys
fn each_key(&self, f: &fn(&K) -> bool);
/// Visit all values
fn each_value(&self, f: &fn(&V) -> bool);
/// Iterate over the map and mutate the contained values
fn mutate_values(&mut self, f: &fn(&K, &mut V) -> bool);
/// Return a reference to the value corresponding to the key
fn find(&self, key: &K) -> Option<&'self V>;
/// Return a mutable reference to the value corresponding to the key
fn find_mut(&mut self, key: &K) -> Option<&'self mut V>;
/// Insert a key-value pair into the map. An existing value for a
/// key is replaced by the new value. Return true if the key did
/// not already exist in the map.
fn insert(&mut self, key: K, value: V) -> bool;
/// Remove a key-value pair from the map. Return true if the key
/// was present in the map, otherwise false.
fn remove(&mut self, key: &K) -> bool;
}
pub trait Set<T>: Mutable {
/// Return true if the set contains a value
fn contains(&self, value: &T) -> bool;
/// Add a value to the set. Return true if the value was not already
/// present in the set.
fn insert(&mut self, value: T) -> bool;
/// Remove a value from the set. Return true if the value was
/// present in the set.
fn remove(&mut self, value: &T) -> bool;
/// Return true if the set has no elements in common with `other`.
/// This is equivalent to checking for an empty intersection.
fn is_disjoint(&self, other: &Self) -> bool;
/// Return true if the set is a subset of another
fn is_subset(&self, other: &Self) -> bool;
/// Return true if the set is a superset of another
fn is_superset(&self, other: &Self) -> bool;
/// Visit the values representing the difference
fn difference(&self, other: &Self, f: &fn(&T) -> bool);
/// Visit the values representing the symmetric difference
fn symmetric_difference(&self, other: &Self, f: &fn(&T) -> bool);
/// Visit the values representing the intersection
fn intersection(&self, other: &Self, f: &fn(&T) -> bool);
/// Visit the values representing the union
fn union(&self, other: &Self, f: &fn(&T) -> bool);
}
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