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/*
* File: is_same.hpp
* Purpose: Equivalence header.
* Author: Amlal El Mahrouss (amlal@nekernel.org)
* Copyright 2025, Amlal El Mahrouss, licensed under the Boost Software License.
*/
#pragma once
#include <core/config.hpp>
/// @brief OCL equivalence namespace.
namespace ocl
{
template <typename T>
struct basic_hash
{
using result_type = typename T::result_type;
using type = T;
/// @brief hash from T's result_type.
static result_type hash()
{
return T{}.hash();
}
};
template <typename T, typename U>
struct is_same
{
static constexpr bool value = false;
/// @brief check if hash matches what we expect.
constexpr bool operator()() noexcept
{
return T::hash() == U::hash();
}
};
template <typename T>
struct is_same<T, T>
{
static constexpr bool value = true;
};
template <typename T, typename U>
struct is_not_same
{
static constexpr bool value = true;
constexpr bool operator()() noexcept
{
return T::hash() != U::hash();
}
};
template <typename T>
struct is_not_same<T, T>
{
static constexpr bool value = false;
};
template <typename T>
struct equiv_is_int8
{
private:
T left_ = 127, right_ = 127;
public:
using result_type = T;
constexpr result_type hash()
{
return (left_ + right_) < 1;
}
};
template <typename T>
struct equiv_not_int8
{
private:
// these shall overflow if not int8.
T left_ = 127, right_ = 127;
public:
using result_type = T;
constexpr result_type hash()
{
return (left_ + right_) > 0;
}
};
template <typename T>
struct equiv_is_real
{
private:
T left_ = 5, right_ = 3;
public:
using result_type = T;
constexpr result_type hash()
{
return left_ / right_ == 1;
}
};
} // namespace ocl
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