Apply suggestions from code review

Co-authored-by: Emil Ernerfeldt <[email protected]>

egui/src/any/any_map.rs

@@ -2,7 +2,11 @@ use crate::any::element::{AnyMapElement, AnyMapTrait};
 use std::any::TypeId;
 use std::collections::HashMap;
 
-/// Stores object of any type.
+/// Maps types to a single instance of that type.
+///
+/// Used to store state per widget type. In effect a sort of singleton storage.
+/// Similar to [the `typemap` crate](https://docs.rs/typemap/0.3.3/typemap/) but allows serialization
+/// (if compiled with the `persistence` feature).
 #[derive(Clone, Debug, Default)]
 pub struct AnyMap(HashMap<TypeId, AnyMapElement>);
 

egui/src/any/element.rs

@@ -1,6 +1,7 @@
 use std::any::{Any, TypeId};
 use std::fmt;
 
+/// Like [`std::any::Any`], but also implements `Clone`.
 pub(crate) struct AnyMapElement {
     value: Box<dyn Any + 'static>,
     clone_fn: fn(&Box<dyn Any + 'static>) -> Box<dyn Any + 'static>,

egui/src/any/mod.rs

@@ -8,7 +8,7 @@
 //!
 //! If you want to store your type here, it must implement `Clone` and `Any` and be `'static`, which means it must not contain references. If you want to store your data in serializable storage, it must implement `serde::Serialize` and `serde::Deserialize` under the `persistent` feature.
 //!
-//! # `AnyMap`
+//! # [`AnyMap`]
 //!
 //! It stores everything by just type. You should use this map for your widget when all instances of your widgets can have only one state. E.g. for popup windows, for color picker.
 //!
@@ -17,7 +17,7 @@
 //! struct MyEditBool(pub bool);
 //! ```
 //!
-//! # `AnyMapId`
+//! # [`AnyMapId`]
 //!
 //! [`AnyMap`] and [`AnyMapId`] has a quite similar interface, except for [`AnyMapId`] you should pass [`Id`] to get and insert things.
 //!

egui/src/any/serializable/any_map.rs

@@ -12,7 +12,11 @@ use {
     std::any::TypeId,
 };
 
-/// Stores object of any type and can be de/serialized.
+/// Maps types to a single instance of that type.
+///
+/// Used to store state per widget type. In effect a sort of singleton storage.
+/// Similar to [the `typemap` crate](https://docs.rs/typemap/0.3.3/typemap/) but allows serialization
+/// (if compiled with the `persistence` feature).
 #[derive(Clone, Debug, Default)]
 #[cfg_attr(feature = "persistence", derive(serde::Deserialize, serde::Serialize))]
 pub struct AnyMap(HashMap<TypeId, AnyMapElement>);

egui/src/any/serializable/element.rs

@@ -45,7 +45,7 @@ impl<'de> Deserialize<'de> for AnyMapElement {
             type Value = String;
 
             fn expecting(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
-                formatter.write_str("string that contains data json")
+                formatter.write_str("string that contains RON (Rust Object Notation)")
             }
 
             fn visit_str<E: serde::de::Error>(self, value: &str) -> Result<Self::Value, E> {