Type Alias JSObjectCallAsConstructorCallback

pub type JSObjectCallAsConstructorCallback = Option<unsafe extern "C" fn(ctx: JSContextRef, constructor: JSObjectRef, argumentCount: usize, arguments: *const JSValueRef, exception: *mut JSValueRef) -> *mut OpaqueJSValue>;

The callback invoked when an object is used as a constructor in a new expression.

• ctx: The execution context to use.
• constructor: A JSObjectRef that is the constructor being called.
• argumentCount: An integer count of the number of arguments in arguments.
• arguments: A JSValueRef array of the arguments passed to the function.
• exception: A pointer to a JSValueRef in which to return an exception, if any.

Returns a JSObjectRef that is the constructor’s return value.

If you named your function CallAsConstructor, you would declare it like this:

JSObjectRef
CallAsConstructor(JSContextRef ctx, JSObjectRef constructor,
                  size_t argumentCount, const JSValueRef arguments[],
                  JSValueRef* exception);

If your callback were invoked by the JavaScript expression new myConstructor(), constructor would be set to myConstructor.

If this callback is NULL, using your object as a constructor in a new expression will throw an exception.

Aliased Type

pub enum JSObjectCallAsConstructorCallback {
    None,
    Some(unsafe extern "C" fn(*const OpaqueJSContext, *mut OpaqueJSValue, usize, *const *const OpaqueJSValue, *mut *const OpaqueJSValue) -> *mut OpaqueJSValue),
}

Variants

None

No value.

Some(unsafe extern "C" fn(*const OpaqueJSContext, *mut OpaqueJSValue, usize, *const *const OpaqueJSValue, *mut *const OpaqueJSValue) -> *mut OpaqueJSValue)

Some value of type T.