Struct FunctionSpec

pub struct FunctionSpec { /* private fields */ }

Builder for a single Function, used inside ExtensionSpec::function.

Implementations

impl FunctionSpec

pub fn param(self, name: impl Into<String>, ty: Type) -> Self

Appends a typed parameter. The name must be a valid ASCII identifier (validated at Build::generate time).

pub fn returns(self, ty: Type) -> Self

Sets the return type. Omit for a void function.

pub fn async(self) -> Self

Marks the function asynchronous. Async functions must also declare returns(Type::String); validation fails otherwise. See Function::r#async for the runtime token protocol.

Trait Implementations

impl Clone for FunctionSpec

fn clone(&self) -> FunctionSpec

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for FunctionSpec

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

Formats the value using the given formatter.