/*
* vector.h
*
*  Created on: 6 окт. 2018 г.
*      Author: disba1ancer
*/

#ifndef VEC_H_
#define VEC_H_


namespace dse::math {

namespace impl {

template <typename value_t>
concept no_cvref =

!std::is_reference_v<value_t> &&

!std::is_const_v<std::remove_reference_t<value_t>> &&

!std::is_volatile_v<std::remove_reference_t<value_t>>;

template <typename value_t>
concept ref_or_val =

std::is_lvalue_reference_v<value_t> ||

no_cvref<value_t>;

constexpr auto character_to_index(char ch) -> std::size_t {

return (ch - 'x') & 3;
}

}

template <typename value_t, std::size_t size>
requires(!std::is_const_v<value_t> && !std::is_volatile_v<value_t>)
struct vec {

using value_type = value_t;

using reference_type = value_t&;

using const_reference_type = const value_t&;


value_t elements[size];


constexpr auto at_ptr(std::size_t index) -> value_t* { return elements + index; }

constexpr auto at_ptr(std::size_t index) const -> const value_t* { return elements + index; }

constexpr auto at(std::size_t index)…