Trait IntoCondSystem 

pub trait IntoCondSystem<I, O, M>: IntoSystem<I, O, M>
where
    I: SystemInput,
{
    // Provided methods
    fn only_if<B, MarkerB>(
        self,
        system: B,
    ) -> SilentCondSystem<Self::System, B::System>
       where B: IntoSystem<(), bool, MarkerB> { ... }
    fn only_if_with_output<B, MarkerB>(
        self,
        system: B,
    ) -> CondSystem<Self::System, B::System>
       where B: IntoSystem<(), bool, MarkerB> { ... }
}

Extend IntoSystem to allow for some conditional execution. Probably only appropriate for one-shot systems. Prefer run_if() when directly adding to the scheduler.

Provided Methods

fn only_if<B, MarkerB>( self, system: B, ) -> SilentCondSystem<Self::System, B::System>

where B: IntoSystem<(), bool, MarkerB>,

Only run self’s system if the given system parameter returns true. No output is provided. (This is convenient for running systems with bevy::prelude::Commands::run_system).

fn only_if_with_output<B, MarkerB>( self, system: B, ) -> CondSystem<Self::System, B::System>

where B: IntoSystem<(), bool, MarkerB>,

Only run self’s system if the given system parameter returns true. The output is an Option<Self::Out>. None is returned when the condition returns false.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl<I, O, M, T> IntoCondSystem<I, O, M> for T

where T: IntoSystem<I, O, M>, I: SystemInput,