Trait JsFunction 

pub trait JsFunction {
    type Ret;

    const ARITY: usize;
}

The signature a Function<T> is typed with: a fn(Args..) -> Ret whose slots name the JS types the function takes and returns.

A slot may be any Rust carrier of a JS type, a handle such as JsString or a converted value such as Nullable<JsString> or Option<Number>, as a Promise<T> or Array<T> type argument may. The call* and bind* methods marshal through the erased JsValue representation and so bound their slots to JsGeneric handles themselves.

Required Associated Constants

const ARITY: usize

Required Associated Types

type Ret

Dyn Compatibility

This trait is not dyn compatible.

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

Implementations on Foreign Types

impl<Ret, Arg1, Arg2, Arg3, Arg4, Arg5, Arg6, Arg7, Arg8> JsFunction for fn(Arg1, Arg2, Arg3, Arg4, Arg5, Arg6, Arg7, Arg8) -> Ret

const ARITY: usize = 8

type Ret = Ret

impl<Ret, Arg1, Arg2, Arg3, Arg4, Arg5, Arg6, Arg7> JsFunction for fn(Arg1, Arg2, Arg3, Arg4, Arg5, Arg6, Arg7) -> Ret

const ARITY: usize = 7

type Ret = Ret

impl<Ret, Arg1, Arg2, Arg3, Arg4, Arg5, Arg6> JsFunction for fn(Arg1, Arg2, Arg3, Arg4, Arg5, Arg6) -> Ret

const ARITY: usize = 6

type Ret = Ret

impl<Ret, Arg1, Arg2, Arg3, Arg4, Arg5> JsFunction for fn(Arg1, Arg2, Arg3, Arg4, Arg5) -> Ret

const ARITY: usize = 5

type Ret = Ret

impl<Ret, Arg1, Arg2, Arg3, Arg4> JsFunction for fn(Arg1, Arg2, Arg3, Arg4) -> Ret

const ARITY: usize = 4

type Ret = Ret

impl<Ret, Arg1, Arg2, Arg3> JsFunction for fn(Arg1, Arg2, Arg3) -> Ret

const ARITY: usize = 3

type Ret = Ret

impl<Ret, Arg1, Arg2> JsFunction for fn(Arg1, Arg2) -> Ret

const ARITY: usize = 2

type Ret = Ret

impl<Ret, Arg1> JsFunction for fn(Arg1) -> Ret

const ARITY: usize = 1

type Ret = Ret

impl<Ret> JsFunction for fn() -> Ret

const ARITY: usize = 0

type Ret = Ret

Implementors