Reshape.hpp

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#pragma once
 
#include <stratax/core/Buffer.hpp>
#include <stratax/core/Concepts.hpp>
#include <stratax/core/Config.hpp>
#include <stratax/core/Exceptions.hpp>
#include <stratax/core/Shape.hpp>
#include <stratax/core/Validation.hpp>
#include <stratax/containers/Tensor.hpp>
#include <stratax/containers/Matrix.hpp>
#include <stratax/containers/Vector.hpp>

template<Array A>
stratax::container::Tensor<typename A::value_type>
reshape(const A& arr, const stratax::core::Shape& shape)
{
    stratax::core::validation::require_equal_size(
        arr.size(),
        shape.elements(),
        "Shape mismatch.");
 
    stratax::container::Tensor<typename A::value_type> result(shape);
 
    for (std::size_t i = 0; i < result.size(); ++i)
    {
        result[i] = arr[i];
    }
 
    return result;
}

template<Array A>
stratax::container::Vector<typename A::value_type> 
flatten(const A& arr)
{
    stratax::container::Vector<typename A::value_type> result(arr.size());
 
    for (std::size_t i = 0; i < arr.size(); ++i)
    {
        result[i] = arr[i];
    }
 
    return result;
}