span.h

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/* 
* Copyright (C) 2020-2026 MEmilio
*
* Authors: Daniel Abele
*
* Contact: Martin J. Kuehn <Martin.Kuehn@DLR.de>
*
* 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 MIO_UTILS_SPAN_H
#define MIO_UTILS_SPAN_H
 
#include <utility>
#include <cstddef>
 
namespace mio
{
 
template <class T>
class Span
{
public:
    Span() = default;
 
    template <class Cont>
    Span(const Cont& c)
        : m_ptr(c.size() == 0 ? nullptr : c.data())
        , m_size(c.size())
    {
    }
 
    template <size_t N>
    Span(T (&p)[N])
        : m_ptr(p)
        , m_size(N)
    {
    }
 
    Span(const T* ptr, size_t size)
        : m_ptr(ptr)
        , m_size(size)
    {
    }
 
    const T* get_ptr() const
    {
        return m_ptr;
    }
 
    const T* begin() const
    {
        return m_ptr;
    }
 
    const T* end() const
    {
        return m_ptr + m_size;
    }
 
    size_t size() const
    {
        return m_size;
    }
 
private:
    const T* m_ptr = nullptr;
    size_t m_size  = 0;
};
 
} // namespace mio
 
#endif // MIO_UTILS_SPAN_H