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9c2146288d
# What's changed? * Support for new 'require by string' RFC with relative paths and aliases in now enabled in Luau REPL application ### New Type Solver * Fixed assertion failure on generic table keys (`[expr] = value`) * Fixed an issue with type substitution traversing into the substituted parts during type instantiation * Fixed crash in union simplification when that union contained uninhabited unions and other types inside * Union types in binary type families like `add<a | b, c>` are expanded into `add<a, c> | add<b, c>` to handle * Added handling for type family solving creating new type families * Fixed a bug with normalization operation caching types with unsolved parts * Tables with uninhabited properties are now simplified to `never` * Fixed failures found by fuzzer ### Native Code Generation * Added support for shared code generation between multiple Luau VM instances * Fixed issue in load-store propagation and new tagged LOAD_TVALUE instructions * Fixed issues with partial register dead store elimination causing failures in GC assists --- ### Internal Contributors 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: James McNellis <jmcnellis@roblox.com> Co-authored-by: Vighnesh Vijay <vvijay@roblox.com> Co-authored-by: Vyacheslav Egorov <vegorov@roblox.com>
54 lines
1.6 KiB
C++
54 lines
1.6 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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#include "Luau/Instantiation2.h"
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#include "Fixture.h"
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#include "ClassFixture.h"
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#include "ScopedFlags.h"
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#include "doctest.h"
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using namespace Luau;
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TEST_SUITE_BEGIN("Instantiation2Test");
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TEST_CASE_FIXTURE(Fixture, "weird_cyclic_instantiation")
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{
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TypeArena arena;
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Scope scope(builtinTypes->anyTypePack);
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TypeId genericT = arena.addType(GenericType{"T"});
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TypeId idTy = arena.addType(FunctionType{
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/* generics */ {genericT},
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/* genericPacks */ {},
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/* argTypes */ arena.addTypePack({genericT}),
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/* retTypes */ arena.addTypePack({genericT})
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});
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DenseHashMap<TypeId, TypeId> genericSubstitutions{nullptr};
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DenseHashMap<TypePackId, TypePackId> genericPackSubstitutions{nullptr};
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TypeId freeTy = arena.freshType(&scope);
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FreeType* ft = getMutable<FreeType>(freeTy);
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REQUIRE(ft);
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ft->lowerBound = idTy;
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ft->upperBound = builtinTypes->unknownType;
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genericSubstitutions[genericT] = freeTy;
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CHECK("<T>(T) -> T" == toString(idTy));
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std::optional<TypeId> res = instantiate2(&arena, std::move(genericSubstitutions), std::move(genericPackSubstitutions), idTy);
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// Substitutions should not mutate the original type!
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CHECK("<T>(T) -> T" == toString(idTy));
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// Weird looking because we haven't properly clipped the generic from the
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// function type, but this is what we asked for.
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REQUIRE(res);
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CHECK("<<T>(T) -> T>(<T>(T) -> T) -> <T>(T) -> T" == toString(*res));
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}
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TEST_SUITE_END();
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