Struct Function 

pub struct Function(/* private fields */);

A Deserializable javascript function, that can be stored and used later Must live as long as the runtime it was birthed from

Implementations

impl Function

pub fn into_v8(self) -> Global<Value>

Returns the underlying crate::deno_core::v8::Global This is useful if you want to pass the value to a crate::deno_core::JsRuntime function directly

pub fn as_v8(&self) -> &Global<Value>

Returns a reference to the underlying crate::deno_core::v8::Global This is useful if you want to pass the value to a crate::deno_core::JsRuntime function directly

pub fn try_from_v8<'a, H>( scope: &mut HandleScope<'a>, value: Global<H>, ) -> Result<Self, Error>

where Local<'a, Value>: From<Local<'a, H>>,

Creates a new instance of this struct from a global value

Errors

Will return an error if the value is the wrong type For Value, this check cannot fail

pub unsafe fn from_v8_unchecked(value: Global<Value>) -> Self

Creates a new instance of this struct from a global value Makes no attempt to check the type of the value This can result in a panic if the value is not of the correct type

Safety

This function is unsafe because it does not check the type of the value If the value is not of the correct type, a panic will occur It is recommended to use Self::try_from_v8 instead

impl Function

pub fn is_async(&self) -> bool

Returns true if the function is async

pub fn call<T>( &self, runtime: &mut Runtime, module_context: Option<&ModuleHandle>, args: &impl Serialize, ) -> Result<T, Error>

where T: DeserializeOwned,

Calls this function. See crate::Runtime::call_stored_function Blocks until:

• The event loop is resolved, and
• If the value is a promise, the promise is resolved

Errors

Will return an error if the function cannot be called, if the function returns an error Or if the function returns a value that cannot be deserialized into the given type

pub async fn call_async<T>( &self, runtime: &mut Runtime, module_context: Option<&ModuleHandle>, args: &impl Serialize, ) -> Result<T, Error>

where T: DeserializeOwned,

Calls this function. See crate::Runtime::call_stored_function_async Returns a future that resolves when:

• The event loop is resolved, and
• If the value is a promise, the promise is resolved

Errors

Will return an error if the function cannot be called, if the function returns an error Or if the function returns a value that cannot be deserialized into the given type

pub fn call_immediate<T>( &self, runtime: &mut Runtime, module_context: Option<&ModuleHandle>, args: &impl Serialize, ) -> Result<T, Error>

where T: DeserializeOwned,

Calls this function. See crate::Runtime::call_stored_function_immediate Does not wait for the event loop to resolve, or attempt to resolve promises

Errors

Will return an error if the function cannot be called, if the function returns an error Or if the function returns a value that cannot be deserialized into the given type

Trait Implementations

impl Clone for Function

fn clone(&self) -> Function

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Function

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Function

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Hash for Function

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Into<Global<Value>> for Function

fn into(self) -> Global<Value>

Converts this type into the (usually inferred) input type.

impl PartialEq for Function

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl TryFrom<Global<Value>> for Function

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: Global<Value>) -> Result<Self, Self::Error>

Performs the conversion.

impl Eq for Function

impl StructuralPartialEq for Function