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# What's Changed? We've been hard at work fixing bugs and introducing new features! ## VM * Include constant-folding information in Luau cost model for inlining and loop unrolling * ~1% improvement in compile times ## New Type Solver * `Luau::shallowClone`'s last argument, whether to clone persistent (builtin) types, is now non-optional. * Refinements on properties of tables are now computed with a `read` table property. This resolves some issues around refining table properies and then trying to set them. Fixes #1344. Fixes #1651. ``` if foo.bar then -- Prior to this release, this would be `typeof(foo) & { bar: ~(false?) } -- Now, this is `typeof(foo) & { read bar: ~(false?) } end ``` * The type function `keyof` should respect the empty string as a property, as in: ``` -- equivalent to type Foo ="" type Foo = keyof<{ [""]: number }> ``` * Descend into literals to report subtyping errors for function calls: this both improves bidirectional inference and makes errors more specific. Before, the error reporting for a table with incorrect members passed to a function would cite the entire table, but now it only cites the members that are incorrectly typed. * Fixes a case where intersecting two tables without any common properties would create `never`, instead of a table with both of their properties. # Internal Contributors Co-authored-by: Ariel Weiss <aaronweiss@roblox.com> Co-authored-by: Hunter Goldstein <hgoldstein@roblox.com> Co-authored-by: James McNellis <jmcnellis@roblox.com> Co-authored-by: Sora Kanosue <skanosue@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> --------- 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: Aviral Goel <agoel@roblox.com> Co-authored-by: Vighnesh <vvijay@roblox.com> Co-authored-by: Vyacheslav Egorov <vegorov@roblox.com> Co-authored-by: Ariel Weiss <aaronweiss@roblox.com> Co-authored-by: Andy Friesen <afriesen@roblox.com> |
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| .. | ||
| conformance | ||
| require | ||
| AssemblyBuilderA64.test.cpp | ||
| AssemblyBuilderX64.test.cpp | ||
| AstJsonEncoder.test.cpp | ||
| AstQuery.test.cpp | ||
| AstQueryDsl.cpp | ||
| AstQueryDsl.h | ||
| AstVisitor.test.cpp | ||
| Autocomplete.test.cpp | ||
| BuiltinDefinitions.test.cpp | ||
| ClassFixture.cpp | ||
| ClassFixture.h | ||
| CodeAllocator.test.cpp | ||
| Compiler.test.cpp | ||
| Config.test.cpp | ||
| Conformance.test.cpp | ||
| ConformanceIrHooks.h | ||
| ConstraintGeneratorFixture.cpp | ||
| ConstraintGeneratorFixture.h | ||
| ConstraintSolver.test.cpp | ||
| CostModel.test.cpp | ||
| DataFlowGraph.test.cpp | ||
| DenseHash.test.cpp | ||
| EqSat.language.test.cpp | ||
| EqSat.propositional.test.cpp | ||
| EqSat.slice.test.cpp | ||
| EqSatSimplification.test.cpp | ||
| Error.test.cpp | ||
| Fixture.cpp | ||
| Fixture.h | ||
| FragmentAutocomplete.test.cpp | ||
| Frontend.test.cpp | ||
| Generalization.test.cpp | ||
| InferPolarity.test.cpp | ||
| InsertionOrderedMap.test.cpp | ||
| Instantiation2.test.cpp | ||
| IostreamOptional.h | ||
| IrBuilder.test.cpp | ||
| IrCallWrapperX64.test.cpp | ||
| IrLowering.test.cpp | ||
| IrRegAllocX64.test.cpp | ||
| JsonEmitter.test.cpp | ||
| Lexer.test.cpp | ||
| Linter.test.cpp | ||
| LValue.test.cpp | ||
| main.cpp | ||
| Module.test.cpp | ||
| NonstrictMode.test.cpp | ||
| NonStrictTypeChecker.test.cpp | ||
| Normalize.test.cpp | ||
| NotNull.test.cpp | ||
| Parser.test.cpp | ||
| RegisterCallbacks.cpp | ||
| RegisterCallbacks.h | ||
| Repl.test.cpp | ||
| RequireByString.test.cpp | ||
| RequireTracer.test.cpp | ||
| RuntimeLimits.test.cpp | ||
| ScopedFlags.h | ||
| Set.test.cpp | ||
| SharedCodeAllocator.test.cpp | ||
| Simplify.test.cpp | ||
| StringUtils.test.cpp | ||
| Subtyping.test.cpp | ||
| Symbol.test.cpp | ||
| ToDot.test.cpp | ||
| TopoSort.test.cpp | ||
| ToString.test.cpp | ||
| Transpiler.test.cpp | ||
| TxnLog.test.cpp | ||
| TypeFunction.test.cpp | ||
| TypeFunction.user.test.cpp | ||
| TypeInfer.aliases.test.cpp | ||
| TypeInfer.annotations.test.cpp | ||
| TypeInfer.anyerror.test.cpp | ||
| TypeInfer.builtins.test.cpp | ||
| TypeInfer.cfa.test.cpp | ||
| TypeInfer.classes.test.cpp | ||
| TypeInfer.definitions.test.cpp | ||
| TypeInfer.functions.test.cpp | ||
| TypeInfer.generics.test.cpp | ||
| TypeInfer.intersectionTypes.test.cpp | ||
| TypeInfer.loops.test.cpp | ||
| TypeInfer.modules.test.cpp | ||
| TypeInfer.negations.test.cpp | ||
| TypeInfer.oop.test.cpp | ||
| TypeInfer.operators.test.cpp | ||
| TypeInfer.primitives.test.cpp | ||
| TypeInfer.provisional.test.cpp | ||
| TypeInfer.refinements.test.cpp | ||
| TypeInfer.singletons.test.cpp | ||
| TypeInfer.tables.test.cpp | ||
| TypeInfer.test.cpp | ||
| TypeInfer.tryUnify.test.cpp | ||
| TypeInfer.typePacks.test.cpp | ||
| TypeInfer.typestates.test.cpp | ||
| TypeInfer.unionTypes.test.cpp | ||
| TypeInfer.unknownnever.test.cpp | ||
| TypePack.test.cpp | ||
| TypePath.test.cpp | ||
| TypeVar.test.cpp | ||
| Unifier2.test.cpp | ||
| Variant.test.cpp | ||
| VecDeque.test.cpp | ||
| VisitType.test.cpp | ||