include/fud_array.hpp


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/*
 * libfud
 * Copyright 2024 Dominick Allen
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef FUD_ARRAY_HPP
#define FUD_ARRAY_HPP

#include "fud_memory.hpp"
#include "fud_span.hpp"

#include <cstddef>

namespace fud {

template <typename T, size_t Size>
struct Array {
    static_assert(Size > 0);
    using ValueType = T;

    T m_data[Size]; // NOLINT(cppcoreguidelines-avoid-c-arrays)

    constexpr static Array constFill(T value)
    {
        Array arr{};
        setMemory(arr, value);
        return arr;
    }

    [[nodiscard]] constexpr size_t size() const
    {
        return Size;
    }

    constexpr T& front()
    {
        return m_data[0];
    }

    constexpr const T& front() const
    {
        return m_data[0];
    }

    constexpr T& back()
    {
        return m_data[Size - 1];
    }

    constexpr const T& back() const
    {
        return m_data[Size - 1];
    }

    constexpr T* data() noexcept
    {
        return m_data;
    }

    constexpr const T* data() const noexcept
    {
        return m_data;
    }

    constexpr T* begin() noexcept
    {
        return m_data;
    }

    constexpr const T* begin() const noexcept
    {
        return m_data;
    }

    constexpr T* end() noexcept
    {
        return m_data + Size;
    }

    constexpr const T* end() const noexcept
    {
        return m_data + Size;
    }

    constexpr T& operator[](size_t index)
    {
        return m_data[index];
    }

    constexpr const T& operator[](size_t index) const
    {
        return m_data[index];
    }

    constexpr bool operator==(const Array<T, Size>&) const noexcept = default;

    constexpr auto operator<=>(const Array<T, Size>& other) const noexcept = default;

    Span<T, Size> span()
    {
        return Span<T, Size>{data(), Size};
    }
};

} // namespace fud

#endif