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In this update, we continue to improve the overall stability of the new type solver. We're also shipping some early bits of two new features, one of the language and one of the analysis API: user-defined type functions and an incremental typechecking API. If you use the new solver and want to use all new fixes included in this release, you have to reference an additional Luau flag: ```c++ LUAU_DYNAMIC_FASTINT(LuauTypeSolverRelease) ``` And set its value to `645`: ```c++ DFInt::LuauTypeSolverRelease.value = 645; // Or a higher value for future updates ``` ## New Solver * Fix a crash where scopes are incorrectly accessed cross-module after they've been deallocated by appropriately zeroing out associated scope pointers for free types, generic types, table types, etc. * Fix a crash where we were incorrectly caching results for bound types in generalization. * Eliminated some unnecessary intermediate allocations in the constraint solver and type function infrastructure. * Built some initial groundwork for an incremental typecheck API for use by language servers. * Built an initial technical preview for [user-defined type functions](https://rfcs.luau-lang.org/user-defined-type-functions.html), more work still to come (including calling type functions from other type functions), but adventurous folks wanting to experiment with it can try it out by enabling `FFlag::LuauUserDefinedTypeFunctionsSyntax` and `FFlag::LuauUserDefinedTypeFunction` in their local environment. Special thanks to @joonyoo181 who built up all the initial infrastructure for this during his internship! ## Miscellaneous changes * Fix a compilation error on Ubuntu (fixes #1437) --- Internal Contributors: Co-authored-by: Aaron Weiss <aaronweiss@roblox.com> Co-authored-by: Hunter Goldstein <hgoldstein@roblox.com> Co-authored-by: Jeremy Yoo <jyoo@roblox.com> Co-authored-by: Vighnesh Vijay <vvijay@roblox.com> Co-authored-by: Vyacheslav Egorov <vegorov@roblox.com> --------- Co-authored-by: Alexander McCord <amccord@roblox.com> Co-authored-by: Andy Friesen <afriesen@roblox.com> Co-authored-by: Vighnesh <vvijay@roblox.com> Co-authored-by: Aviral Goel <agoel@roblox.com> Co-authored-by: David Cope <dcope@roblox.com> Co-authored-by: Lily Brown <lbrown@roblox.com> Co-authored-by: Vyacheslav Egorov <vegorov@roblox.com> Co-authored-by: Junseo Yoo <jyoo@roblox.com> |
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