47 lines
1.1 KiB
C++
47 lines
1.1 KiB
C++
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#pragma once
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#include <concepts>
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#include <tuple>
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namespace Seele
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{
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template<typename... Types>
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struct Dependencies;
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template<>
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struct Dependencies<>
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{};
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template<typename This, typename... Rest>
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struct Dependencies<This, Rest...> : public Dependencies<Rest...>
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{
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template<typename... Right>
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Dependencies<This, Rest..., Right...> operator|(const Dependencies<Right...>& other)
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{
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return Dependencies<This, Rest..., Right...>();
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}
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};
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namespace Component
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{
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template<typename Comp>
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static int accessComponent(Comp& comp);
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}
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template<typename T, typename... Deps>
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concept is_component = std::same_as<decltype(T::dependencies), Dependencies<Deps...>>;
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#define REQUIRE_COMPONENT(x) \
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private: \
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x& get##x() { return *tl_##x; } \
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const x& get##x() const { return *tl_##x; }; \
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public: \
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static Dependencies<x> dependencies;
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#define DECLARE_COMPONENT(x) \
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thread_local extern x* tl_##x; \
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template<> \
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int accessComponent<x>(x& val) { tl_##x = &val; return 0; }
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#define DEFINE_COMPONENT(x) \
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thread_local x* Seele::Component::tl_##x;
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} // namespace Seele
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