Struct CallbackSignature

pub struct CallbackSignature<A, R>
where
    A: IntoLuaMulti,
    R: FromLuaMulti,
{ /* private fields */ }

CallbackSignature is a bit sugar to aid with statically typing event callback function invocation.

The idea is that you declare a signature instance that is typed with its argument tuple (A), and its return type tuple (R).

The signature instance can then be used to invoke the callback by name.

The register method allows pre-registering events so that kumo.on can reason about them better. The main function enabled by this is allow_multiple; when that is set to true, kumo.on will allow recording multiple callback instances, calling them in sequence until one of them returns a value.

Implementations

impl<A, R> CallbackSignature<A, R>

where A: IntoLuaMulti, R: FromLuaMulti,

pub fn new<S: Into<Cow<'static, str>>>(name: S) -> Self

pub fn new_with_multiple<S: Into<Cow<'static, str>>>(name: S) -> Self

Make sure that you call .register() on this from eg: mod_kumo::register in order for it to be instantiated and visible to the config loader

pub fn register(&self)

pub fn raise_error_if_allow_multiple(&self) -> Result<()>

pub fn allow_multiple(&self) -> bool

Return true if this signature allows multiple instances to be registered and called.

pub fn name(&self) -> &str

pub fn decorated_name(&self) -> String