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FRC2016-old/Robot2016/wpilib/cpp/current/include/Base.h

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/*----------------------------------------------------------------------------*/
/* Copyright (c) FIRST 2008-2016. All Rights Reserved. */
/* Open Source Software - may be modified and shared by FRC teams. The code */
/* must be accompanied by the FIRST BSD license file in the root directory of */
/* the project. */
/*----------------------------------------------------------------------------*/
#pragma once
// MSVC 2013 doesn't allow "= default" on move constructors, but since we are
// (currently) only actually using the move constructors in non-MSVC situations
// (ie, wpilibC++Devices), we can just ignore it in MSVC.
#if !defined(_MSC_VER)
#define DEFAULT_MOVE_CONSTRUCTOR(ClassName) \
ClassName(ClassName &&) = default
#else
#define DEFAULT_MOVE_CONSTRUCTOR(ClassName)
#endif
#if (__cplusplus < 201103L)
#if !defined(_MSC_VER)
#define nullptr NULL
#endif
#define constexpr const
#endif
#if defined(_MSC_VER)
#define noexcept throw()
#endif
// [[deprecated(msg)]] is a C++14 feature not supported by MSVC or GCC < 4.9.
// We provide an equivalent warning implementation for those compilers here.
#if defined(_MSC_VER)
#define DEPRECATED(msg) __declspec(deprecated(msg))
#elif defined(__GNUC__)
#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ > 8)
#define DEPRECATED(msg) [[deprecated(msg)]]
#else
#define DEPRECATED(msg) __attribute__((deprecated(msg)))
#endif
#elif __cplusplus > 201103L
#define DEPRECATED(msg) [[deprecated(msg)]]
#else
#define DEPRECATED(msg) /*nothing*/
#endif
// Provide std::decay_t when using GCC < 4.9
#if defined(__GNUC__)
#if __GNUC__ == 4 && __GNUC_MINOR__ < 9
#include <type_traits>
namespace std {
template <class T> using decay_t = typename decay<T>::type;
}
#endif
#endif
// A struct to use as a deleter when a std::shared_ptr must wrap a raw pointer
// that is being deleted by someone else.
template<class T>
struct
NullDeleter {
void operator()(T *) const noexcept {};
};
#include <atomic>
// Use this for determining whether the default move constructor has been
// called on a containing object. This serves the purpose of allowing us to
// use the default move constructor of an object for moving all the data around
// while being able to use this to, for instance, chose not to de-allocate
// a PWM port in a destructor.
struct HasBeenMoved {
HasBeenMoved(HasBeenMoved&& other) {
other.moved = true;
moved = false;
}
HasBeenMoved() = default;
std::atomic<bool> moved{false};
operator bool() const { return moved; }
};
// Define make_unique for C++11-only compilers
#if __cplusplus == 201103L
#include <cstddef>
#include <memory>
#include <type_traits>
#include <utility>
namespace std {
template <class T>
struct _Unique_if {
typedef unique_ptr<T> _Single_object;
};
template <class T>
struct _Unique_if<T[]> {
typedef 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 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 remove_extent<T>::type U;
return unique_ptr<T>(new U[n]());
}
template <class T, class... Args>
typename _Unique_if<T>::_Known_bound make_unique(Args &&...) = delete;
} // namespace std
#endif