2 * Copyright 2016 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.
17 #include <folly/Portability.h>
21 #include <gtest/gtest.h>
26 virtual int foo() const { return 1; }
29 class Derived : public Base {
31 int foo() const final { return 2; }
34 // A compiler that supports final will likely inline the call to p->foo()
35 // in fooDerived (but not in fooBase) as it knows that Derived::foo() can
36 // no longer be overridden.
37 int fooBase(const Base* p) { return p->foo() + 1; }
38 int fooDerived(const Derived* p) { return p->foo() + 1; }
40 TEST(Portability, Final) {
41 std::unique_ptr<Derived> p(new Derived);
42 EXPECT_EQ(3, fooBase(p.get()));
43 EXPECT_EQ(3, fooDerived(p.get()));