Struct ExternalFn 

pub struct ExternalFn {
    pub name: String,
    pub language: Language,
    pub body: String,
    pub arg_types: Vec<ValueType>,
    pub return_type: ValueType,
    pub pure: bool,
}

A registered external function: everything needed to type-check a call and (via the improv_extfn runtime) invoke it deterministically.

body is the function body (statements), evaluated with the arguments bound and expected to produce a result (the runtime defines the exact contract).

Fields

name: String

language: Language

body: String

arg_types: Vec<ValueType>

Declared argument types, in order. arity() == arg_types.len().

return_type: ValueType

pure: bool

The author asserts the body is pure (deterministic, no engine-observable side effects). Enforcement beyond the runtime’s isolated invocation is future work.

Implementations

impl ExternalFn

pub fn arity(&self) -> usize

Trait Implementations

impl Clone for ExternalFn

fn clone(&self) -> ExternalFn

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ExternalFn

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ExternalFn

fn deserialize<__D>( __deserializer: __D, ) -> Result<ExternalFn, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for ExternalFn

impl PartialEq for ExternalFn

fn eq(&self, other: &ExternalFn) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for ExternalFn

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ExternalFn