view_arguments.hpp

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#pragma once
 
#include <co_ecs/component.hpp>
 
namespace co_ecs {
 
// Forward declaration of a view class
template<component_reference... Args>
class view;
 
namespace detail {
 
// Help to convert std::tuple<Args...> into view<Args...>
 
template<component_reference... Args>
struct view_arguments {
    static constexpr bool is_const = const_component_references_v<Args...>;
};
 
template<typename T>
struct view_converter {};
 
template<typename... Args>
struct view_converter<std::tuple<Args...>> {
    using view_t = view<Args...>;
    using view_arguments_t = view_arguments<Args...>;
};
 
// Helper to decompose function type arguments
template<typename F>
struct func_decomposer {
    using view_converter_t = view_converter<typename function_traits<F>::arguments_tuple_type>;
    using view_t = view_converter_t::view_t;
    static constexpr bool is_const = view_converter_t::view_arguments_t::is_const;
};
 
} // namespace detail
} // namespace co_ecs