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122 lines
3.5 KiB
C++
122 lines
3.5 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/FileResolver.h"
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#include "Luau/TypePack.h"
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#include "Luau/TypedAllocator.h"
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#include "Luau/ParseOptions.h"
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#include "Luau/Error.h"
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#include "Luau/ParseResult.h"
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#include <memory>
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#include <vector>
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#include <unordered_map>
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#include <optional>
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namespace Luau
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{
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struct Module;
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using ScopePtr = std::shared_ptr<struct Scope>;
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using ModulePtr = std::shared_ptr<Module>;
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/// Root of the AST of a parsed source file
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struct SourceModule
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{
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ModuleName name; // DataModel path if possible. Filename if not.
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SourceCode::Type type = SourceCode::None;
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std::optional<std::string> environmentName;
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bool cyclic = false;
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std::unique_ptr<Allocator> allocator;
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std::unique_ptr<AstNameTable> names;
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std::vector<ParseError> parseErrors;
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AstStatBlock* root = nullptr;
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std::optional<Mode> mode;
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std::vector<HotComment> hotcomments;
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std::vector<Comment> commentLocations;
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SourceModule()
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: allocator(new Allocator)
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, names(new AstNameTable(*allocator))
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{
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}
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};
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bool isWithinComment(const SourceModule& sourceModule, Position pos);
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struct TypeArena
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{
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TypedAllocator<TypeVar> typeVars;
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TypedAllocator<TypePackVar> typePacks;
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void clear();
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template<typename T>
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TypeId addType(T tv)
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{
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if constexpr (std::is_same_v<T, UnionTypeVar>)
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LUAU_ASSERT(tv.options.size() >= 2);
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return addTV(TypeVar(std::move(tv)));
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}
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TypeId addTV(TypeVar&& tv);
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TypeId freshType(TypeLevel level);
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TypePackId addTypePack(std::initializer_list<TypeId> types);
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TypePackId addTypePack(std::vector<TypeId> types);
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TypePackId addTypePack(TypePack pack);
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TypePackId addTypePack(TypePackVar pack);
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};
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void freeze(TypeArena& arena);
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void unfreeze(TypeArena& arena);
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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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int recursionCount = 0;
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bool encounteredFreeType = false;
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};
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TypePackId clone(TypePackId tp, TypeArena& dest, SeenTypes& seenTypes, SeenTypePacks& seenTypePacks, CloneState& cloneState);
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TypeId clone(TypeId tp, TypeArena& dest, SeenTypes& seenTypes, SeenTypePacks& seenTypePacks, CloneState& cloneState);
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TypeFun clone(const TypeFun& typeFun, TypeArena& dest, SeenTypes& seenTypes, SeenTypePacks& seenTypePacks, CloneState& cloneState);
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struct Module
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{
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~Module();
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TypeArena interfaceTypes;
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TypeArena internalTypes;
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std::vector<std::pair<Location, ScopePtr>> scopes; // never empty
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DenseHashMap<const AstExpr*, TypeId> astTypes{nullptr};
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DenseHashMap<const AstExpr*, TypeId> astExpectedTypes{nullptr};
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DenseHashMap<const AstExpr*, TypeId> astOriginalCallTypes{nullptr};
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DenseHashMap<const AstExpr*, TypeId> astOverloadResolvedTypes{nullptr};
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std::unordered_map<Name, TypeId> declaredGlobals;
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ErrorVec errors;
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Mode mode;
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SourceCode::Type type;
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ScopePtr getModuleScope() const;
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// Once a module has been typechecked, we clone its public interface into a separate arena.
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// This helps us to force TypeVar ownership into a DAG rather than a DCG.
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// Returns true if there were any free types encountered in the public interface. This
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// indicates a bug in the type checker that we want to surface.
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bool clonePublicInterface();
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};
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} // namespace Luau
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