Function CallMethod

source/script_object.cpp:19–51

//

ResultType CallMethod(IObject *aInvokee, IObject *aThis, LPTSTR aMethodName
	, ExprTokenType *aParamValue, int aParamCount, __int64 *aRetVal // For event handlers.
	, int aExtraFlags) // For Object.__Delete().
{
	ResultToken result_token;
	TCHAR result_buf[MAX_NUMBER_SIZE];
	result_token.InitResult(result_buf);

	ExprTokenType this_token(aThis);

	ExprTokenType **param = (ExprTokenType **)_alloca(aParamCount * sizeof(ExprTokenType *));
	for (int i = 0; i < aParamCount; ++i)
		param[i] = aParamValue + i;

	ResultType result = aInvokee->Invoke(result_token, IT_CALL | aExtraFlags, aMethodName, this_token, param, aParamCount);

	// Exceptions are thrown by Invoke for too few/many parameters, but not for non-existent method.
	// Check for that here, with the exception that objects are permitted to lack a __Delete method.
	if (result == INVOKE_NOT_HANDLED && !(aExtraFlags & IF_BYPASS_METAFUNC))
		result = ResultToken().UnknownMemberError(this_token, IT_CALL, aMethodName);

	if (result != EARLY_EXIT && result != FAIL)
	{
		// Indicate to caller whether an integer value was returned (for MsgMonitor()).
		result = TokenIsEmptyString(result_token) ? OK : EARLY_RETURN;
	}
	
	if (aRetVal) // Always set this as some callers don't initialize it:
		*aRetVal = result == EARLY_RETURN ? TokenToInt64(result_token) : 0;

	result_token.Free();
	return result;
}


//