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# General This release introduces initial work on a Roundtrippable AST for Luau, and numerous fixes to the new type solver, runtime, and fragment autocomplete. ## Roundtrippable AST To support tooling around source code transformations, we are extending the parser to retain source information so that we can re-emit the initial source code exactly as the author wrote it. We have made numerous changes to the Transpiler, added new AST types such as `AstTypeGroup`, and added source information to AST nodes such as `AstExprInterpString`, `AstExprIfElse`, `AstTypeTable`, `AstTypeReference`, `AstTypeSingletonString`, and `AstTypeTypeof`. ## New Type Solver * Implement `setmetatable` and `getmetatable` type functions. * Fix handling of nested and recursive union type functions to prevent the solver from getting stuck. * Free types in both old and new solver now have an upper and lower bound to resolve mixed mode usage of the solvers in fragment autocomplete. * Fix infinite recursion during normalization of cyclic tables. * Add normalization support for intersections of subclasses with negated superclasses. ## Runtime * Fix compilation error in Luau buffer bit operations for big-endian machines. ## Miscellaneous * Add test and bugfixes to fragment autocomplete. * Fixed `clang-tidy` warnings in `Simplify.cpp`. **Full Changelog**: https://github.com/luau-lang/luau/compare/0.659...0.660 --- 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: Varun Saini <vsaini@roblox.com> Co-authored-by: Vighnesh Vijay <vvijay@roblox.com> Co-authored-by: Vyacheslav Egorov <vegorov@roblox.com> --------- Co-authored-by: Hunter Goldstein <hgoldstein@roblox.com> Co-authored-by: Varun Saini <61795485+vrn-sn@users.noreply.github.com> Co-authored-by: Alexander Youngblood <ayoungblood@roblox.com> Co-authored-by: Menarul Alam <malam@roblox.com>
43 lines
1.4 KiB
C++
43 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/NotNull.h>
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#include "Luau/TypeArena.h"
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#include "Luau/Type.h"
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#include "Luau/Scope.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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* Persistent types are not cloned as an optimization.
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* If a type is cloned in order to mutate it, 'ignorePersistent' has to be set
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*/
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TypePackId shallowClone(TypePackId tp, TypeArena& dest, CloneState& cloneState, bool ignorePersistent = false);
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TypeId shallowClone(TypeId typeId, TypeArena& dest, CloneState& cloneState, bool ignorePersistent = false);
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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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Binding clone(const Binding& binding, TypeArena& dest, CloneState& cloneState);
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} // namespace Luau
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