71 lines
1.4 KiB
C++
71 lines
1.4 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/Def.h"
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#include "Luau/TypedAllocator.h"
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#include "Luau/Variant.h"
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#include <memory>
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namespace Luau
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{
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struct TypeVar;
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using TypeId = const TypeVar*;
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struct Negation;
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struct Conjunction;
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struct Disjunction;
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struct Equivalence;
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struct Proposition;
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using Connective = Variant<Negation, Conjunction, Disjunction, Equivalence, Proposition>;
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using ConnectiveId = Connective*; // Can and most likely is nullptr.
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struct Negation
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{
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ConnectiveId connective;
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};
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struct Conjunction
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{
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ConnectiveId lhs;
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ConnectiveId rhs;
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};
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struct Disjunction
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{
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ConnectiveId lhs;
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ConnectiveId rhs;
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};
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struct Equivalence
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{
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ConnectiveId lhs;
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ConnectiveId rhs;
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};
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struct Proposition
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{
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DefId def;
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TypeId discriminantTy;
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};
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template<typename T>
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const T* get(ConnectiveId connective)
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{
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return get_if<T>(connective);
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}
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struct ConnectiveArena
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{
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TypedAllocator<Connective> allocator;
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ConnectiveId negation(ConnectiveId connective);
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ConnectiveId conjunction(ConnectiveId lhs, ConnectiveId rhs);
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ConnectiveId disjunction(ConnectiveId lhs, ConnectiveId rhs);
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ConnectiveId equivalence(ConnectiveId lhs, ConnectiveId rhs);
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ConnectiveId proposition(DefId def, TypeId discriminantTy);
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};
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} // namespace Luau
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