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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>
36 lines
884 B
C++
36 lines
884 B
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 "Luau/Ast.h"
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#include "Luau/DenseHash.h"
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#include <vector>
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namespace Luau
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{
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enum class Mode
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{
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NoCheck, // Do not perform any inference
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Nonstrict, // Unannotated symbols are any
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Strict, // Unannotated symbols are inferred
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Definition, // Type definition module, has special parsing rules
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};
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struct FragmentParseResumeSettings
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{
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DenseHashMap<AstName, AstLocal*> localMap{AstName()};
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std::vector<AstLocal*> localStack;
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Position resumePosition;
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};
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struct ParseOptions
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{
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bool allowDeclarationSyntax = false;
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bool captureComments = false;
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std::optional<FragmentParseResumeSettings> parseFragment = std::nullopt;
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bool storeCstData = false;
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bool noErrorLimit = false;
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};
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} // namespace Luau
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