--- /dev/null
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--- /dev/null
+//! This crate provides the `AnyMap` type, a safe and convenient store for one value of each type.
+
+#![crate_id = "anymap#0.9"]
+#![crate_type = "rlib"]
+#![crate_type = "dylib"]
+#![warn(unnecessary_qualification, non_uppercase_statics, unsafe_block,
+ variant_size_difference, managed_heap_memory, unnecessary_typecast,
+ missing_doc, unused_result, deprecated_owned_vector)]
+
+use std::any::{Any, AnyRefExt, AnyMutRefExt};
+use std::intrinsics::TypeId;
+use std::collections::HashMap;
+
+/// A map containing zero or one values for any given type and allowing convenient,
+/// type-safe access to those values.
+///
+/// ```rust
+/// # use anymap::AnyMap;
+/// let mut data = AnyMap::new();
+/// assert_eq!(data.find(), None::<&int>);
+/// data.insert(42i);
+/// assert_eq!(data.find(), Some(&42i));
+/// data.remove::<int>();
+/// assert_eq!(data.find::<int>(), None);
+///
+/// #[deriving(PartialEq, Show)]
+/// struct Foo {
+/// str: String,
+/// }
+///
+/// assert_eq!(data.find::<Foo>(), None);
+/// data.insert(Foo { str: "foo".to_string() });
+/// assert_eq!(data.find(), Some(&Foo { str: "foo".to_string() }));
+/// data.find_mut::<Foo>().map(|foo| foo.str.push_char('t'));
+/// assert_eq!(data.find::<Foo>().unwrap().str.as_slice(), "foot");
+/// ```
+///
+/// Values containing non-static references are not permitted.
+pub struct AnyMap {
+ data: HashMap<TypeId, Box<Any>:'static>,
+}
+
+impl AnyMap {
+ /// Construct a new `AnyMap`.
+ pub fn new() -> AnyMap {
+ AnyMap {
+ data: HashMap::new(),
+ }
+ }
+}
+
+impl AnyMap {
+ /// Retrieve the value stored in the map for the type `T`, if it exists.
+ pub fn find<'a, T: 'static>(&'a self) -> Option<&'a T> {
+ self.data.find(&TypeId::of::<T>()).and_then(|any| any.as_ref::<T>())
+ }
+
+ /// Retrieve a mutable reference to the value stored in the map for the type `T`, if it exists.
+ pub fn find_mut<'a, T: 'static>(&'a mut self) -> Option<&'a mut T> {
+ self.data.find_mut(&TypeId::of::<T>()).and_then(|any| any.as_mut::<T>())
+ }
+
+ /// Set the value contained in the map for the type `T`.
+ /// This will override any previous value stored.
+ pub fn insert<T: 'static>(&mut self, value: T) {
+ self.data.insert(TypeId::of::<T>(), box value as Box<Any>:'static);
+ }
+
+ /// Remove the value for the type `T` if it existed.
+ pub fn remove<T: 'static>(&mut self) {
+ self.data.remove(&TypeId::of::<T>());
+ }
+}