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

/************************************************************************************
*                                                                                   *
*   Copyright (c) 2014 - 2018 Axel Menzel <info@rttr.org>                           *
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*   This file is part of RTTR (Run Time Type Reflection)                            *
*   License: MIT License                                                            *
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#ifndef RTTR_COMPARE_LESS_IMPL_H_
#define RTTR_COMPARE_LESS_IMPL_H_

#include "rttr/type.h"
#include "rttr/detail/comparison/compare_array_less.h"
#include <type_traits>

namespace rttr
{
namespace detail
{

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

template<typename T>
RTTR_INLINE typename std::enable_if<is_less_than_comparable<T>::value && !std::is_array<T>::value, bool>::type
compare_less_than(const T& lhs, const T& rhs, int& result)
{
    result = (lhs < rhs ? - 1 : ((rhs < lhs) ? 1 : 0));
    return true;
}

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

template<typename T>
RTTR_INLINE typename std::enable_if<!is_less_than_comparable<T>::value && !std::is_array<T>::value, bool>::type
compare_less_than(const T& lhs, const T& rhs, int& result)
{
    return compare_types_less_than(&lhs, &rhs, type::get<T>(), result);
}

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

template<typename T>
RTTR_INLINE typename std::enable_if<!is_less_than_comparable<T>::value && std::is_array<T>::value, bool>::type
compare_less_than(const T& lhs, const T& rhs, int& result)
{
    result = compare_array_less(lhs, rhs) ? -1 : 1;
    return true;
}

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

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

#endif // RTTR_COMPARE_LESS_IMPL_H_