[VM generic function reification] Support generic functions in Invocation class.

tests/language_2/generic_no_such_method_dispatcher_test.dart

+// Copyright (c) 2017, 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.
+// VMOptions=--reify-generic-functions --optimization-counter-threshold=10 --no-use-osr --no-background-compilation
+
+import "package:expect/expect.dart";
+
+// Test that noSuchMethod dispatching and auto-closurization work correctly
+// with generic functions.
+
+class A {
+  noSuchMethod(m) {
+    return 123;
+  }
+
+  bar<U, V>(x) => x + 1;
+}
+
+class B extends A {}
+
+class C {
+  C(this.typeArgs, this.posArgs, this.namedArgs);
+  List typeArgs;
+  List posArgs;
+  Map namedArgs;
+  noSuchMethod(m) {
+    Expect.equals(typeArgs.length, m.typeArguments.length);
+    for (var i = 0; i < typeArgs.length; ++i) {
+      Expect.equals(typeArgs[i], m.typeArguments[i]);
+    }
+    Expect.equals(posArgs.length, m.positionalArguments.length);
+    for (var i = 0; i < posArgs.length; ++i) {
+      Expect.equals(posArgs[i], m.positionalArguments[i]);
+    }
+    Expect.equals(namedArgs.length, m.namedArguments.length);
+    for (var k in namedArgs.keys) {
+      Expect.equals(namedArgs[k], m.namedArguments[new Symbol(k)]);
+    }
+    return 123;
+  }
+}
+
+main() {
+  var a = new A();
+  for (var i = 0; i < 20; ++i) Expect.equals(123, a.foo<int, A>());
+  Expect.throws(() => (a.foo)());
+  Expect.throws(() => (a.foo)<int, A>());
+  Expect.equals("123", (a.foo).toString());
+
+  var b = new B();
+  for (var i = 0; i < 20; ++i) {
+    Expect.equals(2, b.bar<int, A>(1));
+    Expect.equals(2, b.bar(1));
+    Expect.equals(123, b.bar<int, A>());
+    Expect.equals(3, b.bar<int, A>(2));
+    Expect.equals(123, b.bar<int>(1));
+  }
+
+  for (var i = 0; i < 20; ++i) {
+    Expect.equals(123, b.bar<int, A>(1, 2, 3));
+    Expect.equals(123, b.bar<int, A>(1, 2, foo: 3));
+    Expect.equals(123, b.bar<int>(1));
+  }
+
+  // Test type, named, and positional arguments.
+  var c = new C([int, A], [100], {"n1": 101, "n2": 102});
+  for (var i = 0; i < 20; ++i) {
+    Expect.equals(123, c.bar<int, A>(100, n1: 101, n2: 102));
+    Expect.equals(123, c.bar<int, A>(100, n2: 102, n1: 101));
+  }
+}