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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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| .. | ||
| basic.luau | ||
| CMakeLists.txt | ||
| compiler.cpp | ||
| format.cpp | ||
| libprotobuf-mutator-patch.patch | ||
| linter.cpp | ||
| luau.proto | ||
| number.cpp | ||
| parser.cpp | ||
| proto.cpp | ||
| protoprint.cpp | ||
| prototest.cpp | ||
| syntax.dict | ||
| transpiler.cpp | ||
| typeck.cpp | ||