76 lines
2.6 KiB
C++
76 lines
2.6 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 saw {
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#define SAW_CONCAT_(x, y) x##y
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#define SAW_CONCAT(x, y) SAW_CONCAT_(x, y)
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#define SAW_UNIQUE_NAME(prefix) SAW_CONCAT(prefix, __LINE__)
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#define SAW_FORBID_COPY(classname) \
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classname(const classname &) = delete; \
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classname &operator=(const classname &) = delete
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#define SAW_FORBID_MOVE(classname) \
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classname(classname &&) = delete; \
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classname &operator=(classname &&) = delete
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#define SAW_DEFAULT_COPY(classname) \
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classname(const classname &) = default; \
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classname &operator=(const classname &) = default
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#define SAW_DEFAULT_MOVE(classname) \
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classname(classname &&) = default; \
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classname &operator=(classname &&) = default
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// In case of C++20
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#define SAW_ASSERT(expression) \
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assert(expression); \
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if (!(expression)) [[unlikely]]
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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 own<T>(new 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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template <typename T> T instance() noexcept;
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template <typename Func, typename T> struct return_type_helper {
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typedef decltype(instance<Func>()(instance<T>())) Type;
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};
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template <typename Func> struct return_type_helper<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 return_type = typename return_type_helper<Func, T>::Type;
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struct void_t {};
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template <typename T> struct void_fix { typedef T Type; };
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template <> struct void_fix<void> { typedef void_t Type; };
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template <typename T> using fix_void = typename void_fix<T>::Type;
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template <typename T> struct void_unfix { typedef T Type; };
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template <> struct void_unfix<void_t> { typedef void Type; };
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template <typename T> using unfix_void = typename void_unfix<T>::Type;
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template <typename... T> constexpr bool always_false = false;
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} // namespace saw
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