docs: add documentation comments

3 files changed, 161 insertions, 3 deletions

diff --git a/syrette/src/di_container.rs b/syrette/src/di_container.rs
index 7aa8225..f9580ae 100644
--- a/syrette/src/di_container.rs
+++ b/syrette/src/di_container.rs
@@ -11,6 +11,7 @@ use crate::injectable::Injectable;
 use crate::libs::intertrait::cast_box::CastBox;
 use crate::provider::{IInjectableTypeProvider, InjectableTypeProvider};
 
+/// Binding builder for `InterfaceTrait` in a [`DIContainer`].
 pub struct BindingBuilder<'a, InterfaceTrait>
 where
     InterfaceTrait: 'static + ?Sized,
@@ -31,6 +32,8 @@ where
         }
     }
 
+    /// Creates a binding of `InterfaceTrait` to type `Implementation` inside of the
+    /// associated [`DIContainer`].
     pub fn to<Implementation>(&mut self)
     where
         Implementation: Injectable,
@@ -57,6 +60,14 @@ impl Display for DIContainerError
 
 impl Context for DIContainerError {}
 
+/// Dependency injection container.
+///
+/// # Examples
+/// ```
+/// di_container.bind::<dyn IDatabaseService>().to::<DatabaseService>();
+///
+/// let database_service = di_container.get::<dyn IDatabaseService>()?;
+/// ```
 pub struct DIContainer
 {
     _bindings: HashMap<TypeId, Rc<dyn IInjectableTypeProvider>>,
@@ -64,6 +75,7 @@ pub struct DIContainer
 
 impl<'a> DIContainer
 {
+    /// Returns a new `DIContainer`.
     pub fn new() -> Self
     {
         Self {
@@ -71,6 +83,7 @@ impl<'a> DIContainer
         }
     }
 
+    /// Returns a new [`BindingBuilder`] for the given interface trait.
     pub fn bind<InterfaceTrait>(&'a mut self) -> BindingBuilder<InterfaceTrait>
     where
         InterfaceTrait: 'static + ?Sized,
@@ -78,6 +91,7 @@ impl<'a> DIContainer
         BindingBuilder::<InterfaceTrait>::new(self)
     }
 
+    /// Returns the value bound with `InterfaceTrait`.
     pub fn get<InterfaceTrait>(
         &self,
     ) -> error_stack::Result<Box<InterfaceTrait>, DIContainerError>
diff --git a/syrette/src/lib.rs b/syrette/src/lib.rs
index 5cf9f71..fb5d03f 100644
--- a/syrette/src/lib.rs
+++ b/syrette/src/lib.rs
@@ -1,8 +1,127 @@
-mod di_container;
+//! Syrette
+//!
+//! Syrette is a collection of utilities useful for performing dependency injection.
+//!
+//! # Examples
+//! ```
+//! use syrette::{injectable, DIContainer, DIContainerError};
+//!
+//! trait IDog
+//! {
+//!     fn woof(&self);
+//! }
+//!
+//! struct Dog {}
+//!
+//! #[injectable(IDog)]
+//! impl Dog
+//! {
+//!     fn new() -> Self
+//!     {
+//!         Self {}
+//!     }
+//! }
+//!
+//! impl IDog for Dog
+//! {
+//!     fn woof(&self)
+//!     {
+//!         println!("Woof!");
+//!     }
+//! }
+//!
+//! trait ICat
+//! {
+//!     fn meow(&self);
+//! }
+//!
+//! struct Cat {}
+//!
+//! #[injectable(ICat)]
+//! impl Cat
+//! {
+//!     fn new() -> Self
+//!     {
+//!         Self {}
+//!     }
+//! }
+//!
+//! impl ICat for Cat
+//! {
+//!     fn meow(&self)
+//!     {
+//!         println!("Meow!");
+//!     }
+//! }
+//!
+//! trait IHuman
+//! {
+//!     fn make_pets_make_sounds(&self);
+//! }
+//!
+//! struct Human
+//! {
+//!     _dog: Box<dyn IDog>,
+//!     _cat: Box<dyn ICat>,
+//! }
+//!
+//! #[injectable(IHuman)]
+//! impl Human
+//! {
+//!     fn new(dog: Box<dyn IDog>, cat: Box<dyn ICat>) -> Self
+//!     {
+//!         Self {
+//!             _dog: dog,
+//!             _cat: cat,
+//!         }
+//!     }
+//! }
+//!
+//! impl IHuman for Human
+//! {
+//!     fn make_pets_make_sounds(&self)
+//!     {
+//!         println!("Hi doggy!");
+//!
+//!         self._dog.woof();
+//!
+//!         println!("Hi kitty!");
+//!
+//!         self._cat.meow();
+//!     }
+//! }
+//!
+//! fn main() -> error_stack::Result<(), DIContainerError>
+//! {
+//!     println!("Hello, world!");
+//!
+//!     let mut di_container: DIContainer = DIContainer::new();
+//!
+//!     di_container.bind::<dyn IDog>().to::<Dog>();
+//!     di_container.bind::<dyn ICat>().to::<Cat>();
+//!     di_container.bind::<dyn IHuman>().to::<Human>();
+//!
+//!     let dog = di_container.get::<dyn IDog>()?;
+//!
+//!     dog.woof();
+//!
+//!     let human = di_container.get::<dyn IHuman>()?;
+//!
+//!     human.make_pets_make_sounds();
+//!
+//!     Ok(())
+//! }
+//!
+//! ```
+
+pub mod di_container;
+pub mod injectable;
 
 pub use di_container::*;
 pub use syrette_macros::*;
 
-pub mod injectable;
-
+#[doc(hidden)]
 pub mod libs;
+
+// Private
+mod provider;
diff --git a/syrette_macros/src/lib.rs b/syrette_macros/src/lib.rs
index 3fd8a59..faf338c 100644
--- a/syrette_macros/src/lib.rs
+++ b/syrette_macros/src/lib.rs
@@ -141,6 +141,30 @@ fn get_dependency_types(item_impl: &ItemImpl) -> Vec<Type>
     );
 }
 
+/// Makes a struct injectable. Therefore usable with `DIContainer`.
+///
+/// # Arguments
+///
+/// * A interface trait the struct implements.
+///
+/// # Examples
+/// ```
+/// trait IConfigReader
+/// {
+///     fn read_config() -> Config;
+/// }
+///
+/// struct ConfigReader {}
+///
+/// #[injectable(IConfigReader)]
+/// impl IConfigReader for ConfigReader
+/// {
+///     fn read_config() -> Config
+///     {
+///         // Stuff here
+///     }
+/// }
+/// ```
 #[proc_macro_attribute]
 pub fn injectable(args_stream: TokenStream, impl_stream: TokenStream) -> TokenStream
 {
@@ -205,6 +229,7 @@ pub fn injectable(args_stream: TokenStream, impl_stream: TokenStream) -> TokenSt
     .into()
 }
 
+#[doc(hidden)]
 #[proc_macro]
 pub fn castable_to(input: TokenStream) -> TokenStream
 {