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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>
76 lines
1.5 KiB
C++
76 lines
1.5 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 "Luau/Common.h"
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#include "Luau/Location.h"
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#include "Luau/Lexer.h"
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#include "Luau/StringUtils.h"
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namespace Luau
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{
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class AstStatBlock;
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class CstNode;
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class ParseError : public std::exception
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{
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public:
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ParseError(const Location& location, const std::string& message);
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virtual const char* what() const throw();
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const Location& getLocation() const;
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const std::string& getMessage() const;
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static LUAU_NORETURN void raise(const Location& location, const char* format, ...) LUAU_PRINTF_ATTR(2, 3);
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private:
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Location location;
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std::string message;
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};
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class ParseErrors : public std::exception
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{
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public:
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ParseErrors(std::vector<ParseError> errors);
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virtual const char* what() const throw();
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const std::vector<ParseError>& getErrors() const;
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private:
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std::vector<ParseError> errors;
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std::string message;
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};
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struct HotComment
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{
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bool header;
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Location location;
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std::string content;
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};
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struct Comment
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{
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Lexeme::Type type; // Comment, BlockComment, or BrokenComment
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Location location;
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};
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using CstNodeMap = DenseHashMap<AstNode*, CstNode*>;
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struct ParseResult
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{
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AstStatBlock* root;
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size_t lines = 0;
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std::vector<HotComment> hotcomments;
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std::vector<ParseError> errors;
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std::vector<Comment> commentLocations;
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CstNodeMap cstNodeMap{nullptr};
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};
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static constexpr const char* kParseNameError = "%error-id%";
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} // namespace Luau
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