48 lines
1.3 KiB
C++
48 lines
1.3 KiB
C++
#pragma once
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#include <cstdint>
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#include <memory>
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#include <optional>
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#include <utility>
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namespace gin {
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#define GIN_CONCAT_(x, y) x##y
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#define GIN_CONCAT(x, y) GIN_CONCAT_(x, y)
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#define GIN_UNIQUE_NAME(prefix) GIN_CONCAT(prefix, __LINE__)
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#define GIN_FORBID_COPY(classname) \
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classname(const classname &) = delete; \
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classname &operator=(const classname &) = delete
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template <typename T> using Maybe = std::optional<T>;
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template <typename T> using Own = std::unique_ptr<T>;
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template <typename T> using Our = std::shared_ptr<T>;
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template <typename T> using Lent = std::weak_ptr<T>;
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template <typename T, class... Args> Own<T> heap(Args &&... args) {
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return std::make_unique<T>(std::forward<Args>(args)...);
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}
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template <typename T, class... Args> Our<T> share(Args &&... args) {
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return std::make_shared<T>(std::forward<Args>(args)...);
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}
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struct Void {};
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template <typename T> T instance() noexcept;
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template <typename Func, typename T> struct ReturnTypeHelper {
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typedef decltype(instance<Func>()(instance<T>())) Type;
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};
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template <typename Func> struct ReturnTypeHelper<Func, void> {
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typedef decltype(instance<Func>()()) Type;
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};
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template <typename Func, typename T>
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using ReturnType = typename ReturnTypeHelper<Func, T>::Type;
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} // namespace gin
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