Downcast rust code#

“It’s hard for me to sit on the sideline and watch, I’ve just got so much energy and want to play as much as I can.

“The first game was obviously important to me, I was just trying to get on the court and try to be there for my team,” he said after scoring 17 points in Friday’s 90-60 win over Manhattan. He hopped on the exercise bikes and spent time in the training pools to maintain his cardio as he tried to get back onto the court as fast as possible. Being forced to the sideline as the team prepared for the season came as a form of torture for the extroverted, 7-foot-2 preseason All-American. 6, missed about a month with a foot injury he suffered in a September practice. The Bristol native, cleared to practice just a week before the Huskies opened the 2023-24 campaign on Nov. Simplifies the use of the DynCast trait by abstracting away the differenceīetween different ways of storing trait objects.Missing UConn’s season-opener wasn’t an option for sophomore center Donovan Clingan. Used by macros to determine if a type can be coerced to a 'config' type's Specifies the trait that we are casting from and the trait we are casting to. This is an implementation detail for the macros that implement DynCast.Ĭast a trait object ( T::Source) into a different trait object ( T::Target). Implements DynCastConfig, DynCastConfigTargetTest and Implement the DynCast trait for a type to cast from a specific trait object If you need moreĬontrol over the generated config type then use the impl_dyn_cast_config Macros create_dyn_cast_configĬreate a new config type that implements DynCastConfig. So you want to write object oriented Rust :: Darrien's Blog - Dev work and musings LicenseĪt your choosing. This library was mentioned in the following blog post in the 'Upcasting' The following GutHub issue Clean up pseudo-downcasting from VpnProvider supertrait to subtraits with better solution The disadvantage is that it would be much lessĮrgonomic than what this crate offers. You could for example minimize bloat by only implementing methods for casts Doing this yourself can be more flexible and You could just define methods on your traits similar to the ones provided by So it has aĭifferent use case and both it and this crate could be useful in the same The downcast-rs crate offers downcasting to concrete types but notĭirectly casting from one trait object to another trait object. Requires that you explicitly create a registry and register all your types Linkme or inventory that needs platform specific support. The traitcast_core library allow for a more low level API that doesn'tĭepend on a global registry and therefore also doesn't depend on a crate like Intertrait actually mentions as an advantage to its approach. Main, something that is generally discouraged and this is something that

Downcast rust code#

The inventory crate uses the ctor crate to run some code before Uses the inventory crate to build the registry instead of the linkmeĬrate. Global registry that is keyed with TypeIds. The traitcast crate works similar to intertrait in that it has a Is a limitation that this crate doesn't have. It also means that it can't work onĪll platforms since the linkme crate needs to offer support for them. It probably has some runtime overhead when it looks up a cast function in Type ids for types that can be cast into a certain trait object. It uses the linkme crate to create a registry of std::any::Any The intertrait crate offers similar functionality to this crate but hasĪ totally different implementation, at least as of intertrait versionĠ.2.0. This way the generated code doesn'tĬall the method that preform the coercion to the Target trait unless the If there is a method that can apply after that. If the first methodĬan't be used the compiler will insert a deref operation ( &*foo) and see So that it is only implemented if the cast can succeed. The first struct's cast method has a trait bound So the impl_dyn_cast macro works by generating a struct that implementsĬore::ops::Deref into another type. Let used_fallback: & dyn Source = HasTrait:: :: new().