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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>
30 lines
1.1 KiB
C++
30 lines
1.1 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 isFlagExperimental(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.
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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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"LuauSolverV2",
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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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