67 lines
1.8 KiB
C++
67 lines
1.8 KiB
C++
// This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
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#pragma once
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#include "Luau/TypeVar.h"
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LUAU_FASTFLAG(LuauShareTxnSeen);
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namespace Luau
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{
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// Log of where what TypeIds we are rebinding and what they used to be
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struct TxnLog
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{
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TxnLog()
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: originalSeenSize(0)
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, ownedSeen()
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, sharedSeen(&ownedSeen)
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{
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}
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explicit TxnLog(std::vector<std::pair<TypeId, TypeId>>* sharedSeen)
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: originalSeenSize(sharedSeen->size())
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, ownedSeen()
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, sharedSeen(sharedSeen)
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{
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}
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explicit TxnLog(const std::vector<std::pair<TypeId, TypeId>>& ownedSeen)
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: originalSeenSize(ownedSeen.size())
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, ownedSeen(ownedSeen)
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, sharedSeen(nullptr)
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{
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// This is deprecated!
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LUAU_ASSERT(!FFlag::LuauShareTxnSeen);
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}
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TxnLog(const TxnLog&) = delete;
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TxnLog& operator=(const TxnLog&) = delete;
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TxnLog(TxnLog&&) = default;
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TxnLog& operator=(TxnLog&&) = default;
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void operator()(TypeId a);
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void operator()(TypePackId a);
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void operator()(TableTypeVar* a);
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void rollback();
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void concat(TxnLog rhs);
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bool haveSeen(TypeId lhs, TypeId rhs);
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void pushSeen(TypeId lhs, TypeId rhs);
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void popSeen(TypeId lhs, TypeId rhs);
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private:
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std::vector<std::pair<TypeId, TypeVar>> typeVarChanges;
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std::vector<std::pair<TypePackId, TypePackVar>> typePackChanges;
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std::vector<std::pair<TableTypeVar*, std::optional<TypeId>>> tableChanges;
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size_t originalSeenSize;
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public:
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std::vector<std::pair<TypeId, TypeId>> ownedSeen; // used to avoid infinite recursion when types are cyclic
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std::vector<std::pair<TypeId, TypeId>>* sharedSeen; // shared with all the descendent logs
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};
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} // namespace Luau
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