2 * Copyright 2017 Facebook, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
19 #include <folly/portability/GTest.h>
24 virtual int foo() const { return 1; }
27 class Derived : public Base {
29 int foo() const final { return 2; }
32 // A compiler that supports final will likely inline the call to p->foo()
33 // in fooDerived (but not in fooBase) as it knows that Derived::foo() can
34 // no longer be overridden.
35 int fooBase(const Base* p) { return p->foo() + 1; }
36 int fooDerived(const Derived* p) { return p->foo() + 1; }
38 TEST(Portability, Final) {
39 std::unique_ptr<Derived> p(new Derived);
40 EXPECT_EQ(3, fooBase(p.get()));
41 EXPECT_EQ(3, fooDerived(p.get()));