89 lines
1.6 KiB
C++
89 lines
1.6 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/Variant.h"
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#include <string>
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#include <memory>
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#include <vector>
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namespace Luau
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{
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struct Scope2;
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struct TypeVar;
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using TypeId = const TypeVar*;
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struct TypePackVar;
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using TypePackId = const TypePackVar*;
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// subType <: superType
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struct SubtypeConstraint
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{
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TypeId subType;
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TypeId superType;
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};
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// subPack <: superPack
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struct PackSubtypeConstraint
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{
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TypePackId subPack;
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TypePackId superPack;
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};
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// subType ~ gen superType
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struct GeneralizationConstraint
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{
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TypeId generalizedType;
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TypeId sourceType;
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Scope2* scope;
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};
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// subType ~ inst superType
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struct InstantiationConstraint
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{
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TypeId subType;
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TypeId superType;
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};
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// name(namedType) = name
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struct NameConstraint
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{
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TypeId namedType;
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std::string name;
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};
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using ConstraintV = Variant<SubtypeConstraint, PackSubtypeConstraint, GeneralizationConstraint, InstantiationConstraint, NameConstraint>;
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using ConstraintPtr = std::unique_ptr<struct Constraint>;
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struct Constraint
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{
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explicit Constraint(ConstraintV&& c);
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Constraint(const Constraint&) = delete;
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Constraint& operator=(const Constraint&) = delete;
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ConstraintV c;
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std::vector<NotNull<Constraint>> dependencies;
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};
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inline Constraint& asMutable(const Constraint& c)
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{
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return const_cast<Constraint&>(c);
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}
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template<typename T>
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T* getMutable(Constraint& c)
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{
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return ::Luau::get_if<T>(&c.c);
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}
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template<typename T>
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const T* get(const Constraint& c)
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{
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return getMutable<T>(asMutable(c));
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}
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} // namespace Luau
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