test/std/utilities/memory/unique.ptr/unique.ptr.runtime/unique.ptr.runtime.observers/get_deleter.pass.cpp

//===----------------------------------------------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

// <memory>

// unique_ptr

// test get_deleter()

#include <memory>
#include <cassert>
#include "test_macros.h"

struct Deleter {
  Deleter() {}

  void operator()(void*) const {}

  int test() { return 5; }
  int test() const { return 6; }
};

int main() {
  {
    std::unique_ptr<int[], Deleter> p;
    assert(p.get_deleter().test() == 5);
  }
  {
    const std::unique_ptr<int[], Deleter> p;
    assert(p.get_deleter().test() == 6);
  }
  {
    typedef std::unique_ptr<int[], const Deleter&> UPtr;
    const Deleter d;
    UPtr p(nullptr, d);
    const UPtr& cp = p;
    ASSERT_SAME_TYPE(decltype(p.get_deleter()), const Deleter&);
    ASSERT_SAME_TYPE(decltype(cp.get_deleter()), const Deleter&);
    assert(p.get_deleter().test() == 6);
    assert(cp.get_deleter().test() == 6);
  }
  {
    typedef std::unique_ptr<int[], Deleter&> UPtr;
    Deleter d;
    UPtr p(nullptr, d);
    const UPtr& cp = p;
    ASSERT_SAME_TYPE(decltype(p.get_deleter()), Deleter&);
    ASSERT_SAME_TYPE(decltype(cp.get_deleter()), Deleter&);
    assert(p.get_deleter().test() == 5);
    assert(cp.get_deleter().test() == 5);
  }
}