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fd6250cf9d
### What's Changed - Improve readability of unions and intersections by limiting the number of elements of those types that can be presented on a single line (gated under `FFlag::LuauToStringSimpleCompositeTypesSingleLine`) - Adds a new option to the compiler `--record-stats` to record and output compilation statistics - `if...then...else` expressions are now optimized into `AND/OR` form when possible. ### VM - Add a new `buffer` type to Luau based on the [buffer RFC](https://github.com/Roblox/luau/pull/739) and additional C API functions to work with it; this release does not include the library. - Internal C API to work with string buffers has been updated to align with Lua version more closely ### Native Codegen - Added support for new X64 instruction (rev) and new A64 instruction (bswap) in the assembler - Simplified the way numerical loop condition is translated to IR ### New Type Solver - Operator inference now handled by type families - Created a new system called `Type Paths` to explain why subtyping tests fail in order to improve the quality of error messages. - Systematic changes to implement Data Flow analysis in the new solver (`Breadcrumb` removed and replaced with `RefinementKey`) --- Co-authored-by: Aaron Weiss <aaronweiss@roblox.com> Co-authored-by: Alexander McCord <amccord@roblox.com> Co-authored-by: Andy Friesen <afriesen@roblox.com> Co-authored-by: Aviral Goel <agoel@roblox.com> Co-authored-by: Lily Brown <lbrown@roblox.com> Co-authored-by: Vighnesh Vijay <vvijay@roblox.com> Co-authored-by: Vyacheslav Egorov <vegorov@roblox.com> --------- Co-authored-by: Arseny Kapoulkine <arseny.kapoulkine@gmail.com> Co-authored-by: Vyacheslav Egorov <vegorov@roblox.com> Co-authored-by: Andy Friesen <afriesen@roblox.com> Co-authored-by: Lily Brown <lbrown@roblox.com> Co-authored-by: Aaron Weiss <aaronweiss@roblox.com> Co-authored-by: Alexander McCord <amccord@roblox.com> Co-authored-by: Aviral Goel <agoel@roblox.com>
51 lines
1.2 KiB
C++
51 lines
1.2 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/Variant.h"
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#include "Luau/Symbol.h"
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#include "Luau/TypeFwd.h"
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#include <memory>
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#include <unordered_map>
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namespace Luau
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{
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struct Field;
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// Deprecated. Do not use in new work.
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using LValue = Variant<Symbol, Field>;
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struct Field
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{
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std::shared_ptr<LValue> parent;
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std::string key;
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bool operator==(const Field& rhs) const;
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bool operator!=(const Field& rhs) const;
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};
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struct LValueHasher
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{
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size_t operator()(const LValue& lvalue) const;
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};
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const LValue* baseof(const LValue& lvalue);
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std::optional<LValue> tryGetLValue(const class AstExpr& expr);
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// Utility function: breaks down an LValue to get at the Symbol
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Symbol getBaseSymbol(const LValue& lvalue);
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template<typename T>
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const T* get(const LValue& lvalue)
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{
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return get_if<T>(&lvalue);
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}
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using RefinementMap = std::unordered_map<LValue, TypeId, LValueHasher>;
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void merge(RefinementMap& l, const RefinementMap& r, std::function<TypeId(TypeId, TypeId)> f);
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void addRefinement(RefinementMap& refis, const LValue& lvalue, TypeId ty);
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} // namespace Luau
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