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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> |
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.. | ||
Anyification.h | ||
AnyTypeSummary.h | ||
ApplyTypeFunction.h | ||
AstJsonEncoder.h | ||
AstQuery.h | ||
Autocomplete.h | ||
AutocompleteTypes.h | ||
BuiltinDefinitions.h | ||
Cancellation.h | ||
Clone.h | ||
Constraint.h | ||
ConstraintGenerator.h | ||
ConstraintSolver.h | ||
ControlFlow.h | ||
DataFlowGraph.h | ||
DcrLogger.h | ||
Def.h | ||
Differ.h | ||
Documentation.h | ||
EqSatSimplification.h | ||
EqSatSimplificationImpl.h | ||
Error.h | ||
FileResolver.h | ||
FragmentAutocomplete.h | ||
Frontend.h | ||
Generalization.h | ||
GlobalTypes.h | ||
InsertionOrderedMap.h | ||
Instantiation.h | ||
Instantiation2.h | ||
IostreamHelpers.h | ||
JsonEmitter.h | ||
Linter.h | ||
LValue.h | ||
Metamethods.h | ||
Module.h | ||
ModuleResolver.h | ||
NonStrictTypeChecker.h | ||
Normalize.h | ||
NotNull.h | ||
OverloadResolution.h | ||
Predicate.h | ||
Quantify.h | ||
RecursionCounter.h | ||
Refinement.h | ||
RequireTracer.h | ||
Scope.h | ||
Set.h | ||
Simplify.h | ||
Substitution.h | ||
Subtyping.h | ||
Symbol.h | ||
TableLiteralInference.h | ||
ToDot.h | ||
TopoSortStatements.h | ||
ToString.h | ||
Transpiler.h | ||
TxnLog.h | ||
Type.h | ||
TypeArena.h | ||
TypeAttach.h | ||
TypeChecker2.h | ||
TypeCheckLimits.h | ||
TypedAllocator.h | ||
TypeFunction.h | ||
TypeFunctionReductionGuesser.h | ||
TypeFunctionRuntime.h | ||
TypeFunctionRuntimeBuilder.h | ||
TypeFwd.h | ||
TypeInfer.h | ||
TypeOrPack.h | ||
TypePack.h | ||
TypePairHash.h | ||
TypePath.h | ||
TypeUtils.h | ||
Unifiable.h | ||
Unifier.h | ||
Unifier2.h | ||
UnifierSharedState.h | ||
VisitType.h |