123 lines
2.7 KiB
C++
123 lines
2.7 KiB
C++
#ifndef FURVM_THING_HPP
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#define FURVM_THING_HPP
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#include "furvm/fwd.hpp"
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namespace furvm {
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enum class thing_t : std::uint8_t {
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Int32,
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};
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/**
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* @brief Returns data size of a thing.
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*
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* @param type Type of the thing.
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* @return The data size of the thing.
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*/
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std::size_t thing_type_size(thing_t type);
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class bad_thing_access : public std::exception {
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public:
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bad_thing_access() = default;
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~bad_thing_access() override = default;
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/**
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* @brief Move constructor.
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*/
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bad_thing_access(bad_thing_access&&) noexcept = default;
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/**
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* @brief Move constructor.
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*/
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bad_thing_access& operator=(bad_thing_access&&) noexcept = default;
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/**
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* @brief Copy constructor.
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*/
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bad_thing_access(const bad_thing_access&) = default;
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/**
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* @brief Copy constructor.
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*/
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bad_thing_access& operator=(const bad_thing_access&) = default;
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public:
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/**
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* @brief Returns a C-style string describing the cause of the error.
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*
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* @return The cause of the error.
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*/
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const char* what() const noexcept override { return "bad thing access"; }
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};
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class thing final {
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friend class executor;
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private:
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/**
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* @brief A private token for the private constructor.
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*
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* Also `rzecz` in Polish translates to `thing` I think.
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*/
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struct rzecz {
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explicit rzecz() = default;
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};
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public:
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static constexpr thing_handle GENERATION_SIZE = 12; /**< Bit size of generation part in thing_handle. */
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public:
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/**
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* @brief Private constructor.
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*
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* @param id
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* @param type
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* @param context
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*/
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thing(rzecz, thing_handle id, thing_t type, const context_p& context);
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~thing();
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/**
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* @brief Move constructor.
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*/
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thing(thing&&) noexcept = default;
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/**
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* @brief Move constructor.
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*/
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thing& operator=(thing&&) noexcept = default;
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thing(const thing&) = delete;
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thing& operator=(const thing&) = delete;
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public:
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/**
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* @brief Returns a new thing.
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*
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* @param context Furvm context.
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* @param type Type of the new thing.
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* @return Shared pointer to the new thing.
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*/
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static thing_p create(const context_p& context, thing_t type);
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public:
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/**
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* @brief Returns an int32 value from this thing.
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*
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* @return The value.
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*/
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std::int32_t& int32();
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/**
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* @brief Returns an int32 value from this thing.
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*
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* @return The value.
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*/
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const std::int32_t& int32() const;
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private:
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thing_handle m_id;
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thing_t m_type;
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context_p m_context;
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void* m_data = nullptr;
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};
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} // namespace furvm
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#endif // FURVM_THING_HPP
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