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https://github.com/luau-lang/luau.git
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5f42e63a73
Another week, another release. Happy spring! 🌷 ## New Type Solver - Add typechecking and autocomplete support for user-defined type functions! - Improve the display of type paths, making type mismatch errors far more human-readable. - Enhance various aspects of the `index` type function: support function type metamethods, fix crashes involving cyclic metatables, and forward `any` types through the type function. - Fix incorrect subtyping results involving the `buffer` type. - Fix crashes related to typechecking anonymous functions in nonstrict mode. ## AST - Retain source information for type packs, functions, and type functions. - Introduce `AstTypeOptional` to differentiate `T?` from `T | nil` in the AST. - Prevent the transpiler from advancing before tokens when the AST has errors. ## Autocomplete - Introduce demand-based cloning and better module isolation for fragment autocomplete, leading to a substantial speedup in performance. - Guard against recursive unions in `autocompleteProps`. ## Miscellaneous - #1720 (thank you!) ## Internal Contributors Co-authored-by: Andy Friesen <afriesen@roblox.com> Co-authored-by: Ariel Weiss <aaronweiss@roblox.com> Co-authored-by: Hunter Goldstein <hgoldstein@roblox.com> Co-authored-by: Talha Pathan <tpathan@roblox.com> Co-authored-by: Vighnesh Vijay <vvijay@roblox.com> Co-authored-by: Vyacheslav Egorov <vegorov@roblox.com>
95 lines
3.5 KiB
C++
95 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/Scope.h"
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#include "Luau/Type.h"
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#include <optional>
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namespace Luau
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{
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static constexpr char kRequireTagName[] = "require";
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struct Frontend;
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struct GlobalTypes;
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struct TypeChecker;
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struct TypeArena;
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struct Subtyping;
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void registerBuiltinGlobals(Frontend& frontend, GlobalTypes& globals, bool typeCheckForAutocomplete = false);
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TypeId makeUnion(TypeArena& arena, std::vector<TypeId>&& types);
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TypeId makeIntersection(TypeArena& arena, std::vector<TypeId>&& types);
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/** Build an optional 't'
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*/
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TypeId makeOption(NotNull<BuiltinTypes> builtinTypes, TypeArena& arena, TypeId t);
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/** Small utility function for building up type definitions from C++.
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*/
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TypeId makeFunction( // Monomorphic
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TypeArena& arena,
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std::optional<TypeId> selfType,
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std::initializer_list<TypeId> paramTypes,
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std::initializer_list<TypeId> retTypes,
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bool checked = false
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);
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TypeId makeFunction( // Polymorphic
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TypeArena& arena,
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std::optional<TypeId> selfType,
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std::initializer_list<TypeId> generics,
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std::initializer_list<TypePackId> genericPacks,
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std::initializer_list<TypeId> paramTypes,
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std::initializer_list<TypeId> retTypes,
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bool checked = false
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);
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TypeId makeFunction( // Monomorphic
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TypeArena& arena,
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std::optional<TypeId> selfType,
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std::initializer_list<TypeId> paramTypes,
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std::initializer_list<std::string> paramNames,
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std::initializer_list<TypeId> retTypes,
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bool checked = false
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);
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TypeId makeFunction( // Polymorphic
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TypeArena& arena,
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std::optional<TypeId> selfType,
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std::initializer_list<TypeId> generics,
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std::initializer_list<TypePackId> genericPacks,
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std::initializer_list<TypeId> paramTypes,
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std::initializer_list<std::string> paramNames,
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std::initializer_list<TypeId> retTypes,
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bool checked = false
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);
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void attachMagicFunction(TypeId ty, std::shared_ptr<MagicFunction> fn);
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Property makeProperty(TypeId ty, std::optional<std::string> documentationSymbol = std::nullopt);
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void assignPropDocumentationSymbols(TableType::Props& props, const std::string& baseName);
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std::string getBuiltinDefinitionSource();
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std::string getTypeFunctionDefinitionSource();
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void addGlobalBinding(GlobalTypes& globals, const std::string& name, TypeId ty, const std::string& packageName);
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void addGlobalBinding(GlobalTypes& globals, const std::string& name, Binding binding);
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void addGlobalBinding(GlobalTypes& globals, const ScopePtr& scope, const std::string& name, TypeId ty, const std::string& packageName);
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void addGlobalBinding(GlobalTypes& globals, const ScopePtr& scope, const std::string& name, Binding binding);
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std::optional<Binding> tryGetGlobalBinding(GlobalTypes& globals, const std::string& name);
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Binding* tryGetGlobalBindingRef(GlobalTypes& globals, const std::string& name);
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TypeId getGlobalBinding(GlobalTypes& globals, const std::string& name);
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/** A number of built-in functions are magical enough that we need to match on them specifically by
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* name when they are called. These are listed here to be used whenever necessary, instead of duplicating this logic repeatedly.
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*/
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bool matchSetMetatable(const AstExprCall& call);
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bool matchTableFreeze(const AstExprCall& call);
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bool matchAssert(const AstExprCall& call);
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// Returns `true` if the function should introduce typestate for its first argument.
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bool shouldTypestateForFirstArgument(const AstExprCall& call);
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} // namespace Luau
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