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38 lines
1.1 KiB
C++
38 lines
1.1 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/NotNull.h>
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#include "Luau/TypeArena.h"
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#include "Luau/Type.h"
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#include <unordered_map>
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namespace Luau
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{
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// Only exposed so they can be unit tested.
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using SeenTypes = std::unordered_map<TypeId, TypeId>;
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using SeenTypePacks = std::unordered_map<TypePackId, TypePackId>;
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struct CloneState
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{
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NotNull<BuiltinTypes> builtinTypes;
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SeenTypes seenTypes;
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SeenTypePacks seenTypePacks;
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};
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/** `shallowClone` will make a copy of only the _top level_ constructor of the type,
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* while `clone` will make a deep copy of the entire type and its every component.
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*
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* Be mindful about which behavior you actually _want_.
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*/
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TypePackId shallowClone(TypePackId tp, TypeArena& dest, CloneState& cloneState);
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TypeId shallowClone(TypeId typeId, TypeArena& dest, CloneState& cloneState);
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TypePackId clone(TypePackId tp, TypeArena& dest, CloneState& cloneState);
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TypeId clone(TypeId tp, TypeArena& dest, CloneState& cloneState);
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TypeFun clone(const TypeFun& typeFun, TypeArena& dest, CloneState& cloneState);
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} // namespace Luau
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