Trait Function 

pub trait Function: Send + Sync {
    // Required methods
    fn manifest(&self) -> FunctionManifest;
    fn invoke(
        &self,
        host: HostApi_TO<'_, RBox<()>>,
        input: RStr<'_>,
    ) -> RResult<RString, RString>;
}

A loaded function instance. Constructed once per library via FunctionMod::new_functions and reused across requests, so it must be Send + Sync.

Required Methods

fn manifest(&self) -> FunctionManifest

Static metadata; called once right after construction.

fn invoke( &self, host: HostApi_TO<'_, RBox<()>>, input: RStr<'_>, ) -> RResult<RString, RString>

Handle a single request. input is the request body as JSON; the return value is the JSON response body, or an error message the host turns into a 400 — or a 500 when prefixed with INTERNAL_ERROR_PREFIX.

Must not unwind. This crosses an extern "C" boundary, so a panic escaping it aborts the whole host process rather than failing the one request; catch panics here and return INTERNAL_ERROR_PREFIX instead.

Dyn Compatibility

This trait is dyn compatible.

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

Implementors

impl<'lt, _ErasedPtr> Function for Function_TO<'lt, _ErasedPtr>

where Self: Send + Sync, _ErasedPtr: AsPtr<PtrTarget = ()>,