SmallVector.hpp

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#pragma once
 
#include <array>
 
namespace slide {
 
template <typename T, T Nmax>
class SmallVector
{
  std::array<T, Nmax> data{};
 
public:
  T N{ 0 }; 
 
  SmallVector() = default;
  SmallVector(T N) : N(N)
  {
    if (N > Nmax) {
      std::cerr << "Array is very small! Please increase its size from settings!\n";
      throw 1234;
    }
 
    for (T i = 0; i < N; i++)
      data[i] = 0;
  }
 
  inline void push_back(const T &&elem)
  {
    if (N > Nmax) {
      std::cerr << "Array is very small! Please increase its size from settings!\n";
      throw 1234;
    }
 
    data[N] = elem;
    N++;
  }
 
  inline auto &operator[](T idx)
  {
    if (idx < N)
      return data[idx];
    else {
      std::cerr << "Array is very small! Please increase its size from settings!\n";
      throw 1234;
    }
  }
 
  inline auto empty() { return N == 0; }
 
  [[nodiscard]] inline const auto &operator[](T idx) const noexcept { return data[idx]; }
 
  [[nodiscard]] constexpr auto begin() noexcept { return data.begin(); }
  [[nodiscard]] constexpr auto cbegin() const noexcept { return data.cbegin(); }
 
  [[nodiscard]] constexpr auto end() { return data.begin() + N; }
  [[nodiscard]] constexpr auto cend() const noexcept { return data.cbegin() + N; }
};
 
} // namespace slide