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We have lots of new changes for you! # What's Changed ## General - We updated Luau's license year to 2025! - We fixed a bug where large amounts of errors were being printed when deep intersections of unions error. ## Require-by-String This release introduces the `Luau.Require` library, which exposes the runtime semantics of require-by-string, including support for the new `@self` alias described in [this RFC](https://github.com/luau-lang/rfcs/pull/109). The library operates on a virtualized filesystem, allowing consumers to specify navigation rules without assuming a filesystem context. Documentation in `Require.h` explains how to enable the library, and the `setupState` function in Repl.cpp demonstrates how we've integrated it into the luau CLI tool. Note that the interface in `Require.h` is written in C, which enables any application written in a language with a C foreign-function interface to link against this library and enable require-by-string. This makes it straightforward for any application embedding Luau to support require-by-string, provided that it defines or operates within an environment resembling a virtual filesystem. The core navigation semantics of require-by-string have additionally been pulled into the `Luau.RequireNavigator` library. While `Luau.Require` internally depends on `Luau.RequireNavigator`, the latter does not depend on the Luau VM. This library provides an interface for inspecting require-by-string's navigation behavior and therefore serves as a useful dependency for static tooling. Documentation for `Luau.RequireNavigator` is available in `RequireNavigator.h`. ## Autocomplete - We fixed a memory leak in fragment autocomplete! ## New Solver And Old Solver - We've found a infinite iteration error over a type pack. We added a way to detect this error and throw an `InternalCompileError` instead. - We fix `table.freeze` not accounting for the first argument not getting type stated. We fall back to regular inference instead. - We fix a crash in the old solver with `length_error`. - We fix a crash in the new solver stemming from generalization reentrancy. Now we correctly generalize interior free types that do not appear in a function signature. - We fix a nil refinement. (Fixes https://github.com/luau-lang/luau/issues/1687 and https://github.com/luau-lang/luau/issues/1451) ### Internal Contributors Co-authored-by: Andy Friesen <afriesen@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> Full Changelog: https://github.com/luau-lang/luau/compare/0.668...0.669 --------- 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: Aviral Goel <agoel@roblox.com> Co-authored-by: Vighnesh <vvijay@roblox.com> Co-authored-by: Vyacheslav Egorov <vegorov@roblox.com> Co-authored-by: Ariel Weiss <aaronweiss@roblox.com>
46 lines
1.1 KiB
C++
46 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 "Luau/Scope.h"
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#include "Luau/NotNull.h"
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#include "Luau/TypeFwd.h"
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namespace Luau
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{
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template<typename TID>
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struct GeneralizationParams
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{
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bool foundOutsideFunctions = false;
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size_t useCount = 0;
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Polarity polarity = Polarity::None;
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};
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// Replace a single free type by its bounds according to the polarity provided.
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std::optional<TypeId> generalizeType(
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NotNull<TypeArena> arena,
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NotNull<BuiltinTypes> builtinTypes,
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NotNull<Scope> scope,
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TypeId freeTy,
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const GeneralizationParams<TypeId>& params
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);
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// Generalize one type pack
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std::optional<TypePackId> generalizeTypePack(
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NotNull<TypeArena> arena,
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NotNull<BuiltinTypes> builtinTypes,
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NotNull<Scope> scope,
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TypePackId tp,
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const GeneralizationParams<TypePackId>& params
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);
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void sealTable(NotNull<Scope> scope, TypeId ty);
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std::optional<TypeId> generalize(
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NotNull<TypeArena> arena,
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NotNull<BuiltinTypes> builtinTypes,
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NotNull<Scope> scope,
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NotNull<DenseHashSet<TypeId>> cachedTypes,
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TypeId ty
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);
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}
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