Struct ScriptHostAccess 

pub struct ScriptHostAccess {
    pub signal: fn(&World, &str) -> Option<ScriptValue>,
    pub call: fn(&mut World, &str) -> Result<Option<ScriptValue>, ScriptError>,
    pub exports: fn(&World) -> Vec<String>,
}

Reaching an installed host, in the terms a caller asks in.

Every entry resolves the host resource itself, so the app owns no borrow of it between calls.

Fields

signal: fn(&World, &str) -> Option<ScriptValue>

The value the script last wrote to a signal, from the host’s mirror.

call: fn(&mut World, &str) -> Result<Option<ScriptValue>, ScriptError>

Call an exported function with no arguments, returning what it returned when the host has such a function.

exports: fn(&World) -> Vec<String>

The names a caller may call.

Implementations

impl ScriptHostAccess

pub fn absent() -> Self

The table an app with no script answers through: every entry reports nothing rather than the caller having to ask whether there is a host.

pub fn of<H>(exports: fn(&World) -> Vec<String>) -> Self

where H: ScriptHost + Resource<Mutability = Mutable>,

The table for a host stored as the resource H. exports is the host’s own rule for what a caller may call: ScriptHost carries no export list, so a host without one answers with an empty list.

Trait Implementations

impl Clone for ScriptHostAccess

fn clone(&self) -> ScriptHostAccess

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for ScriptHostAccess