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42a2805f85
* A small subset of control-flow refinements have been added to recognize type options that are unreachable after a conditional/unconditional code block. (Fixes https://github.com/Roblox/luau/issues/356). Some examples: ```lua local function f(x: string?) if not x then return end -- x is 'string' here end ``` Throwing calls like `error` or `assert(false)` instead of 'return' are also recognized. Existing complex refinements like type/typeof and tagged union checks are expected to work, among others. To enable this feature, `LuauTinyControlFlowAnalysis` exclusion has to be removed from `ExperimentalFlags.h`. If will become enabled unconditionally in the near future. * Linter has been integrated into the typechecker analysis so that type-aware lint warnings can work in any mode `Frontend::lint` methods were deprecated, `Frontend::check` has to be used instead with `runLintChecks` option set. Resulting lint warning are located inside `CheckResult`. * Fixed large performance drop and increased memory consumption when array is filled at an offset (Fixes https://github.com/Roblox/luau/issues/590) * Part of [Type error suppression RFC](https://github.com/Roblox/luau/blob/master/rfcs/type-error-suppression.md) was implemented making subtyping checks with `any` type transitive. --- In our work on the new type-solver: * `--!nocheck` mode no longer reports type errors * New solver will not be used for `--!nonstrict` modules until all issues with strict mode typechecking are fixed * Added control-flow aware type refinements mentioned earlier In native code generation: * `LOP_NAMECALL` has been translated to IR * `type` and `typeof` builtin fastcalls have been translated to IR/assembly * Additional steps were taken towards arm64 support
39 lines
1.4 KiB
C++
39 lines
1.4 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 "ConstraintGraphBuilderFixture.h"
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#include "Luau/TypeReduction.h"
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namespace Luau
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{
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ConstraintGraphBuilderFixture::ConstraintGraphBuilderFixture()
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: Fixture()
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, mainModule(new Module)
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, forceTheFlag{"DebugLuauDeferredConstraintResolution", true}
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{
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mainModule->reduction = std::make_unique<TypeReduction>(NotNull{&mainModule->internalTypes}, builtinTypes, NotNull{&ice});
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BlockedType::DEPRECATED_nextIndex = 0;
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BlockedTypePack::nextIndex = 0;
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}
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void ConstraintGraphBuilderFixture::generateConstraints(const std::string& code)
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{
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AstStatBlock* root = parse(code);
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dfg = std::make_unique<DataFlowGraph>(DataFlowGraphBuilder::build(root, NotNull{&ice}));
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cgb = std::make_unique<ConstraintGraphBuilder>("MainModule", mainModule, &arena, NotNull(&moduleResolver), builtinTypes, NotNull(&ice),
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frontend.globals.globalScope, &logger, NotNull{dfg.get()});
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cgb->visit(root);
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rootScope = cgb->rootScope;
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constraints = Luau::borrowConstraints(cgb->constraints);
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}
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void ConstraintGraphBuilderFixture::solve(const std::string& code)
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{
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generateConstraints(code);
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ConstraintSolver cs{NotNull{&normalizer}, NotNull{rootScope}, constraints, "MainModule", NotNull{mainModule->reduction.get()},
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NotNull(&moduleResolver), {}, &logger};
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cs.run();
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}
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} // namespace Luau
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