robot/include/rttr/detail/comparison/compare_equal.h

/************************************************************************************
*                                                                                   *
*   Copyright (c) 2014 - 2018 Axel Menzel <info@rttr.org>                           *
*                                                                                   *
*   This file is part of RTTR (Run Time Type Reflection)                            *
*   License: MIT License                                                            *
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*   Permission is hereby granted, free of charge, to any person obtaining           *
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*   Software is furnished to do so, subject to the following conditions:            *
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#ifndef RTTR_COMPARE_EQUAL_H_
#define RTTR_COMPARE_EQUAL_H_

#include "rttr/detail/base/core_prerequisites.h"
#include "rttr/detail/misc/misc_type_traits.h"
#include "rttr/detail/comparison/comparable_types.h"
#include "rttr/detail/misc/template_type_trait.h"


#include <type_traits>
#include <cstring>

namespace rttr
{
namespace detail
{

/////////////////////////////////////////////////////////////////////////////////////////

RTTR_API bool compare_types_equal(const void* lhs, const void* rhs, const type& t, bool& ok);

/////////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////////


template<typename T>
using has_equal_operator_impl = std::integral_constant<bool, has_equal_operator<T>::value && !std::is_array<T>::value &&
                                                             !is_template_instance<T>::value>;

template<typename T>
using is_equal_comparable = std::integral_constant<bool, has_equal_operator_impl<T>::value ||
                                                         is_comparable_type<T>::value>;


/////////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////////

template<typename T>
RTTR_INLINE typename std::enable_if<is_equal_comparable<T>::value && !std::is_array<T>::value, bool>::type
compare_equal(const T& lhs, const T& rhs, bool& ok);

/////////////////////////////////////////////////////////////////////////////////////////

template<typename T>
RTTR_INLINE typename std::enable_if<!is_equal_comparable<T>::value && !std::is_array<T>::value, bool>::type
compare_equal(const T& lhs, const T& rhs, bool& ok);

/////////////////////////////////////////////////////////////////////////////////////////

template<typename T>
RTTR_INLINE typename std::enable_if<!is_equal_comparable<T>::value && std::is_array<T>::value, bool>::type
compare_equal(const T& lhs, const T& rhs, bool& ok);

/////////////////////////////////////////////////////////////////////////////////////////

} // end namespace detail
} // end namespace rttr

#include "rttr/detail/comparison/compare_equal_impl.h"
// the include in this place is necessary, otherwise we get an error during compilation:
// "'compare_equal': identifier not found"
#include "rttr/detail/misc/template_type_trait_impl.h"

#endif // RTTR_COMPARE_EQUAL_H_