Language/12_Expressions/14_Function_Invocation/3_Unqualified_Invocation_A01_t05.dart

/*
 * Copyright (c) 2011, 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 An unqualified function invocation i has the form id(a1, ... , an, xn+1 : an+1, ... , xn+k :
 * an+k), where id is an identifier.
 * If there exists a lexically visible declaration named id, let fid be the inner-
 * most such declaration. Then:
 *  - If fid is a local function, a library function, a library or static getter or a
 * variable then i is interpreted as a function expression invocation.
 *  - Otherwise, if fid is a static method of the enclosing class C, i is equivalent to
 * C.id(a1, ... , an, xn+1 : an+1, ... , xn+k : an+k).
 *  - Otherwise, fid is necessarily an instance method or getter of the enclosing
 * class C, and i is equivalent to the ordinary method invocation
 * this.id(a1, ... , an, xn+1 : an+1, ... , xn+k : an+k).
 * Otherwise, if i occurs inside a top level or static function (be it function,
 * method, getter, or setter) or variable initializer, evaluation of i causes a
 * NoSuchMethodError to be thrown.
 * If i does not occur inside a top level or static function, i is equivalent to
 * this.id(a1, ... , an, xn+1 : an+1, ... , xn+k : an+k).
 * @description Checks that if fid is a library variable, hence induced library getter,
 * then i is interpreted as a function expression invocation.
 * @author msyabro
 * @reviewer rodionov
 */
import "../../../Utils/expect.dart";

var f = (p1) {
  Expect.equals(null, p1);
  return 100;
};

class A {
  test() {
    var m = f;
    Expect.equals(100, m(null));

    m = 1;
    try {
      m(1, 2, 3); // no warning, static type of m is dynamic (<=> Function)
      Expect.fail("NoSuchMethodError expected");
    } on NoSuchMethodError catch(ok) {}
  }
}

main() {
  new A().test();
}