Remove anymap dependency (#80)

crates/yewdux/Cargo.toml

@@ -18,7 +18,6 @@ future = []
 doctests = []
 
 [dependencies]
-anymap = "1.0.0-beta.2"
 log = "0.4.16"
 serde = { version = "1.0.114", features = ["rc"] }
 serde_json = "1.0.64"

crates/yewdux/src/anymap.rs

@@ -0,0 +1,37 @@
+use std::{
+    any::{Any, TypeId},
+    collections::HashMap,
+};
+
+#[derive(Default)]
+pub(crate) struct AnyMap {
+    map: HashMap<TypeId, Box<dyn Any>>,
+}
+
+impl AnyMap {
+    pub(crate) fn entry<T: 'static>(&mut self) -> Entry<T> {
+        Entry {
+            map: &mut self.map,
+            _marker: std::marker::PhantomData,
+        }
+    }
+}
+
+pub(crate) struct Entry<'a, T: 'static> {
+    map: &'a mut HashMap<TypeId, Box<dyn Any>>,
+    _marker: std::marker::PhantomData<T>,
+}
+
+impl<'a, T: 'static> Entry<'a, T> {
+    pub(crate) fn or_insert_with<F>(self, default: F) -> &'a mut T
+    where
+        F: FnOnce() -> T,
+    {
+        let type_id = TypeId::of::<T>();
+        let value = self
+            .map
+            .entry(type_id)
+            .or_insert_with(|| Box::new(default()));
+        value.downcast_mut().expect("type id mismatch")
+    }
+}

crates/yewdux/src/context.rs

@@ -1,8 +1,7 @@
 use std::rc::Rc;
 
-use anymap::AnyMap;
-
 use crate::{
+    anymap::AnyMap,
     mrc::Mrc,
     store::{Reducer, Store},
     subscriber::{Callable, SubscriberId, Subscribers},

crates/yewdux/src/lib.rs

@@ -30,6 +30,7 @@
 //! ```
 #![allow(clippy::needless_doctest_main)]
 
+mod anymap;
 pub mod context;
 pub mod context_provider;
 pub mod dispatch;