LanguageFeatures/Extension-methods/call_member_t08.dart

// Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

/// @assertion Any expression of the form e1(args) or e1<types>(args) where e1
/// does not denote a method, and where the static type of e1 is not a function
/// type, an interface type declaring a call method, or dynamic, will currently
/// be a compile-time error. If the static type of e1 is an interface type
/// declaring a call getter, then this stays a compile-time error. Otherwise we
/// check for extensions applying to the static type of e1 and declaring a call
/// member. If one such most specific extension exists, and it declares a call
/// extension method, then the expression is equivalent to e1.call(args) or
/// e1.call<typeS>(args). Otherwise it is still a compile-time error.
///
/// @description Check that it is a compile error if there is e1 is an interface
/// with 'call' getter
/// @author sgrekhov@unipro.ru



class A {
  void Function(int, [String]) get call => (x, [y = '']) {};
}

main() {
  A a = new A();
  a(2);
//^
// [analyzer] COMPILE_TIME_ERROR.INVOCATION_OF_NON_FUNCTION_EXPRESSION
// ^
// [cfe] Cannot invoke an instance of 'A' because it declares 'call' to be something other than a method.
  a(2, "3");
//^
// [analyzer] COMPILE_TIME_ERROR.INVOCATION_OF_NON_FUNCTION_EXPRESSION
// ^
// [cfe] Cannot invoke an instance of 'A' because it declares 'call' to be something other than a method.
}