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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>
73 lines
1.8 KiB
C++
73 lines
1.8 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 "Fixture.h"
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#include "Luau/RecursionCounter.h"
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#include "Luau/Type.h"
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#include "doctest.h"
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using namespace Luau;
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LUAU_FASTINT(LuauVisitRecursionLimit);
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LUAU_FASTFLAG(LuauSolverV2)
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TEST_SUITE_BEGIN("VisitType");
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TEST_CASE_FIXTURE(Fixture, "throw_when_limit_is_exceeded")
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{
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if (FFlag::LuauSolverV2)
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{
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CheckResult result = check(R"(
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local t : {a: {b: {c: {d: {e: boolean}}}}}
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)");
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ScopedFastInt sfi{FInt::LuauVisitRecursionLimit, 3};
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TypeId tType = requireType("t");
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CHECK_THROWS_AS(toString(tType), RecursionLimitException);
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}
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else
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{
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ScopedFastInt sfi{FInt::LuauVisitRecursionLimit, 3};
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CheckResult result = check(R"(
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local t : {a: {b: {c: {d: {e: boolean}}}}}
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)");
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TypeId tType = requireType("t");
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CHECK_THROWS_AS(toString(tType), RecursionLimitException);
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}
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}
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TEST_CASE_FIXTURE(Fixture, "dont_throw_when_limit_is_high_enough")
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{
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ScopedFastInt sfi{FInt::LuauVisitRecursionLimit, 8};
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CheckResult result = check(R"(
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local t : {a: {b: {c: {d: {e: boolean}}}}}
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)");
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TypeId tType = requireType("t");
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(void)toString(tType);
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}
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TEST_CASE_FIXTURE(Fixture, "some_free_types_do_not_have_bounds")
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{
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Type t{FreeType{TypeLevel{}, builtinTypes->neverType, builtinTypes->unknownType}};
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(void)toString(&t);
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}
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TEST_CASE_FIXTURE(Fixture, "some_free_types_have_bounds")
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{
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ScopedFastFlag sff{FFlag::LuauSolverV2, true};
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Scope scope{builtinTypes->anyTypePack};
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Type t{FreeType{&scope, builtinTypes->neverType, builtinTypes->numberType}};
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CHECK("('a <: number)" == toString(&t));
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}
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TEST_SUITE_END();
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