Language/Expressions/Method_Invocation/Ordinary_Invocation/static_type_t04.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 Let T be the static type of o.
 * ...
 * If T.m does not exist, or if F is not a function type, the static type of i
 * is Dynamic; otherwise the static type of i is the declared return type of F.
 * @description Checks static invocations, when T denotes a class in the
 * current scope. The static type of a method invocation is Dynamic when F
 * is not a function type (but can be assigned to it) by ensuring that there
 * are no static warnings when a result of such invocation is being assigned
 * to variables with various declared types.
 * @static-clean
 * @author rodionov
 */
// Requirements=nnbd-strong
import "../../../../Utils/expect.dart";

void testme() {}

class C {
  static Function f1 = testme;
}

class A {}

main() {
  Expect.throws(() { String foo = C.f1(); });
  Expect.throws(() { bool   foo = C.f1(); });
  Expect.throws(() { A      foo = C.f1(); });
  Expect.throws(() { Object foo = C.f1(); });
  Expect.throws(() { List   foo = C.f1(); });
  Expect.throws(() { Map    foo = C.f1(); });
}