Type Definition jscjs_sys::api::JSObjectCallAsFunctionCallback

type JSObjectCallAsFunctionCallback = Option<unsafe extern "C" fn(ctx: JSContextRef, function: JSObjectRef, thisObject: JSObjectRef, argumentCount: usize, arguments: *const JSValueRef, exception: *mut JSValueRef) -> JSValueRef>;

@typedef JSObjectCallAsFunctionCallback @abstract The callback invoked when an object is called as a function. @param ctx The execution context to use. @param function A JSObject that is the function being called. @param thisObject A JSObject that is the ‘this’ variable in the function’s scope. @param argumentCount An integer count of the number of arguments in arguments. @param arguments A JSValue array of the arguments passed to the function. @param exception A pointer to a JSValueRef in which to return an exception, if any. @result A JSValue that is the function’s return value. @discussion If you named your function CallAsFunction, you would declare it like this:

JSValueRef CallAsFunction(JSContextRef ctx, JSObjectRef function, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef* exception);

If your callback were invoked by the JavaScript expression ‘myObject.myFunction()’, function would be set to myFunction, and thisObject would be set to myObject.

If this callback is NULL, calling your object as a function will throw an exception.