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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>
33 lines
1.6 KiB
C++
33 lines
1.6 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 <string.h>
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namespace Luau
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{
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inline bool isAnalysisFlagExperimental(const char* flag)
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{
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// Flags in this list are disabled by default in various command-line tools. They may have behavior that is not fully final,
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// or critical bugs that are found after the code has been submitted. This list is intended _only_ for flags that affect
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// Luau's type checking. Flags that may change runtime behavior (e.g.: parser or VM flags) are not appropriate for this list.
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static const char* const kList[] = {
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"LuauInstantiateInSubtyping", // requires some fixes to lua-apps code
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"LuauFixIndexerSubtypingOrdering", // requires some small fixes to lua-apps code since this fixes a false negative
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"StudioReportLuauAny2", // takes telemetry data for usage of any types
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"LuauTableCloneClonesType3", // requires fixes in lua-apps code, terrifyingly
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"LuauNormalizationReorderFreeTypeIntersect", // requires fixes in lua-apps code, also terrifyingly
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"LuauSolverV2",
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"UseNewLuauTypeSolverDefaultEnabled", // This can change the default solver used in cli applications, so it also needs to be disabled. Will require fixes in lua-apps code
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// makes sure we always have at least one entry
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nullptr,
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};
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for (const char* item : kList)
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if (item && strcmp(item, flag) == 0)
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return true;
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return false;
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}
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} // namespace Luau
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