/Users/morten/Programmering/cpp/kick/src/kick/core/cpp_ext.h

//
//  cpp_ext.h
//  KickCPP
//
//  Created by Morten Nobel-Jørgensen on 10/14/13.
//  Copyright (c) 2013 Morten Nobel-Joergensen. All rights reserved.
//

#pragma once

// make_unique<T>(args...)
// make_unique<T[]>(n)
// make_unique<T[N]>(args...) = delete

#include <cstddef>
#include <memory>
#include <type_traits>
#include <utility>

namespace kick {

    template<class T> struct _Unique_if {
        typedef std::unique_ptr<T> _Single_object;
    };
    
    template<class T> struct _Unique_if<T[]> {
        typedef std::unique_ptr<T[]> _Unknown_bound;
    };
    
    template<class T, size_t N> struct _Unique_if<T[N]> {
        typedef void _Known_bound;
    };
    
    template<class T, class... Args>
    typename _Unique_if<T>::_Single_object
    make_unique(Args&&... args) {
        return std::unique_ptr<T>(new T(std::forward<Args>(args)...));
    }
    
    template<class T>
    typename _Unique_if<T>::_Unknown_bound
    make_unique(size_t n) {
        typedef typename std::remove_extent<T>::type U;
        return std::unique_ptr<T>(new U[n]());
    }
    
    template<class T, class... Args>
    typename _Unique_if<T>::_Known_bound
    make_unique(Args&&...) = delete;

}