Trait Runner 

pub trait Runner {
    // Required method
    fn run(&self, source: &str) -> Result<Box<dyn View>, Vec<CodeDiagnostic>>;

    // Provided methods
    fn take_output(&self) -> RunOutput { ... }
    fn watch(&self, wake: Rc<dyn Fn()>) { ... }
}

What turns the code of a Playground into something to show.

It runs when the person asks, never on every frame, so it may take its time and build whatever it needs anew.

Required Methods

fn run(&self, source: &str) -> Result<Box<dyn View>, Vec<CodeDiagnostic>>

The view source makes, or where and why it cannot make one.

Provided Methods

fn take_output(&self) -> RunOutput

What the code printed, and the problems of what it runs later, such as a closure on a click, since the last time this was asked. Nothing, unless the runner keeps them.

fn watch(&self, wake: Rc<dyn Fn()>)

Calls wake whenever there is something new for Self::take_output, so the playground shows it as it comes. Nothing, unless the runner can tell.

Dyn Compatibility

This trait is dyn compatible.

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

Implementors

impl Runner for LiveRunner

impl<F> Runner for F

where F: Fn(&str) -> Result<Box<dyn View>, Vec<CodeDiagnostic>>,