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#pragma once
#include "tools.hpp"
// forwards
class Universe;
// #################################################################################################
enum class VT
{
NORMAL, // keep this one first so that it's the value we get when we default-construct
KEY,
METATABLE
};
enum class InterCopyResult
{
Success,
NotEnoughValues,
Error
};
// #################################################################################################
DECLARE_UNIQUE_TYPE(CacheIndex, StackIndex);
DECLARE_UNIQUE_TYPE(SourceIndex, StackIndex);
class InterCopyContext
{
public:
Universe* const U;
DestState const L2;
SourceState const L1;
CacheIndex const L2_cache_i;
SourceIndex L1_i; // that one can change when we reuse the context
VT vt; // that one can change when we reuse the context
LookupMode const mode;
std::string_view name; // that one can change when we reuse the context
private:
[[nodiscard]] std::string_view findLookupName() const;
// when mode == LookupMode::FromKeeper, L1 is a keeper state and L2 is not, therefore L2 is the state where we want to raise the error
// whon mode != LookupMode::FromKeeper, L1 is not a keeper state, therefore L1 is the state where we want to raise the error
lua_State* getErrL() const { return (mode == LookupMode::FromKeeper) ? L2.value() : L1.value(); }
[[nodiscard]] LuaType processConversion() const;
// for use in copyCachedFunction
void copyFunction() const;
void lookupNativeFunction() const;
// for use in inter_copy_function
void copyCachedFunction() const;
[[nodiscard]] bool lookupTable() const;
// for use in inter_copy_table
void interCopyKeyValuePair() const;
[[nodiscard]] bool pushCachedMetatable() const;
[[nodiscard]] bool pushCachedTable() const;
// for use in inter_copy_userdata
[[nodiscard]] bool tryCopyClonable() const;
[[nodiscard]] bool tryCopyDeep() const;
// copying a single Lua stack item
[[nodiscard]] bool interCopyBoolean() const;
[[nodiscard]] bool interCopyFunction() const;
[[nodiscard]] bool interCopyLightuserdata() const;
[[nodiscard]] bool interCopyNil() const;
[[nodiscard]] bool interCopyNumber() const;
[[nodiscard]] bool interCopyString() const;
[[nodiscard]] bool interCopyTable() const;
[[nodiscard]] bool interCopyUserdata() const;
public:
[[nodiscard]] InterCopyResult interCopy(int n_) const;
[[nodiscard]] InterCopyResult interCopyOne() const;
[[nodiscard]] InterCopyResult interCopyPackage() const;
[[nodiscard]] InterCopyResult interMove(int n_) const;
};
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