driver_concepts.hpp

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#pragma once
 
#include "epaper/core/errors.hpp"
#include "epaper/drivers/driver.hpp"
#include <concepts>
#include <cstddef>
#include <expected>
#include <span>
 
namespace epaper {
 
template <typename T>
concept Driver = std::movable<T> && requires(T &d, DisplayMode mode, std::span<const std::byte> buffer) {
  // Lifecycle
  { d.init(mode) } -> std::same_as<std::expected<void, Error>>;
  { d.sleep() } -> std::same_as<std::expected<void, Error>>;
  { d.wake() } -> std::same_as<std::expected<void, Error>>;
 
  // Drawing
  { d.clear() } -> std::same_as<std::expected<void, Error>>;
  { d.display(buffer) } -> std::same_as<std::expected<void, Error>>;
 
  // Dimensions (can be static or instance methods, but callable on instance)
  { d.width() } -> std::convertible_to<std::size_t>;
  { d.height() } -> std::convertible_to<std::size_t>;
};
 
} // namespace epaper