v0.6.0

Added

• resource module containing types related to resources.
• resource::Resource trait to define a type as a resource.
• resource::Resources trait to define a heterogeneous list of types as a list of resources.
• resources! macro to define a heterogeneous list of resources.
• Resources! macro to define the type of a heterogeneous list of resources.
• query::Result struct containing the result of a query on a World.
• World::with_resources() function to define a World containing resources.
• World::get() method to get an immutable reference to a resource.
• World::get_mut() method to get a mutable reference to a resource.
• World::view_resources() to get references to any number of resources at once.
• resource::Null type which defines the end of a heterogeneous list of resources.
• resource::ContainsResource trait to indicate that a heterogeneous list of resources contains a given resource.
• resource::ContainsViews trait to indicate that a heterogeneous list of resource views is contained in a list of resources.
• resource::Debug trait, implemented on lists of resources that implement core::fmt::Debug.
• resource::Serialize trait, implemented on lists of resources that implement serde::Serialize.
• resource::Deserialize trait, implemented on lists of resources that implement serde::Deserialize.

Changed

• Running a schedule now performs optimizations at run-time. Tasks that can be are now run earlier than their compile-time scheduled stage.
• World::query() and World::par_query() now return a query::Result struct.
• Query has an added ResourceViews generic parameter to indicate the resources that should be viewed during the query.
• System and ParSystem now have a ResourceViews associated type to indicate the resources that should be viewed when the system is run.
• System::run() and ParSystem::run() have a new Self::ViewResources parameter to allow accessing those resources during execution.
• Scheduling multiple systems now accounts for ResourceViews alongside component Views when creating stages.
• The Debug implementation on World now requires the World's resources to implement resource::Debug.
• The Serialize and Deserialize implementations on World now require World's resources to implement resource::Serialize and resource::Deserialize, respectively.
• The Clone, Default, PartialEq, Eq, Send, and Sync implementations on World now require the World's resources to implement those same traits.