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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Type System Test Results</title>
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<div class="content_container">
<header>
<h3>Python Type System Conformance Test Results</h3>
</header>
<div class="table_container"><table><tbody>
<tr><th class="col1"> </th>
<th class='tc-header'><div class='tc-name'>mypy 1.16.1</div>
<div class='tc-time'>2.2sec</div>
</th>
<th class='tc-header'><div class='tc-name'>pyright 1.1.402</div>
<div class='tc-time'>1.5sec</div>
</th>
<th class='tc-header'><div class='tc-name'>pyre 0.9.23</div>
<div class='tc-time'>10.4sec</div>
</th>
</tr>
<tr><th class="column" colspan="4">
<a class="test_group" href="https://typing.readthedocs.io/en/latest/spec/annotations.html">Type annotations</a>
</th></tr>
<tr><th class="column col1"> annotations_coroutines</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column col1"> annotations_forward_refs</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not report error for a forward reference that is not enclosed in quotes.</p><p>Does not report error for use of quoted type with "|" operator (runtime error).</p><p>Incorrectly generates error for quoted type defined in class scope.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not report error for a forward reference that is not enclosed in quotes.</p><p>Does not report error for use of quoted type with "|" operator (runtime error).</p><p>Does not reject f-string in quoted type annotation.</p><p>Incorrectly generates error for quoted type defined in class scope.</p><p>Does not generate error for unquoted type defined in class scope.</p><p>Does not treat triple-quoted forward reference annotation as implicitly parenthesized.</p></span></div></th>
</tr>
<tr><th class="column col1"> annotations_generators</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not report incompatible Generator type in `yield from` statement.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not report invalid return type for generator when function implicitly returns None.</p><p>Incorrectly evaluates type of call to async generator.</p></span></div></th>
</tr>
<tr><th class="column col1"> annotations_methods</th>
<th class="column col2 conformant"><div class="hover-text">Pass*<span class="tooltip-text" id="bottom"><p>Type evaluation differs from other type checkers because of ambiguity in the spec related to method bindings.</p></span></div></th>
<th class="column col2 conformant"><div class="hover-text">Pass*<span class="tooltip-text" id="bottom"><p>Type evaluation differs from other type checkers because of ambiguity in the spec related to method bindings.</p></span></div></th>
<th class="column col2 conformant"><div class="hover-text">Pass*<span class="tooltip-text" id="bottom"><p>Type evaluation differs from other type checkers because of ambiguity in the spec related to method bindings.</p></span></div></th>
</tr>
<tr><th class="column col1"> annotations_typeexpr</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column" colspan="4">
<a class="test_group" href="https://typing.readthedocs.io/en/latest/spec/special-types.html">Special types in annotations</a>
</th></tr>
<tr><th class="column col1"> specialtypes_any</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column col1"> specialtypes_never</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not treat Never as compatible with all other types.</p></span></div></th>
</tr>
<tr><th class="column col1"> specialtypes_none</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column col1"> specialtypes_promotions</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not narrow from float to int after isinstance() check</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not reject use of attribute that is compatible only with float.</p><p>Does not narrow from float to int after isinstance() check</p></span></div></th>
</tr>
<tr><th class="column col1"> specialtypes_type</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not treat `type` same as `type[Any]` for assert_type.</p><p>Does not allow access to unknown attributes from object of type `type[Any]`.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not reject Callable when passed to type[T].</p><p>Does not treat `type` same as `type[Any]` for assert_type.</p><p>Does not allow access to unknown attributes from object of type `type[Any]`.</p><p>Does not reject access to unknown attributes from object of type `Type[object]`.</p><p>Reports type incompatibility between `type` and `Callable[..., Any]`.</p></span></div></th>
</tr>
<tr><th class="column" colspan="4">
<a class="test_group" href="https://typing.readthedocs.io/en/latest/spec/generics.html">Generics</a>
</th></tr>
<tr><th class="column col1"> generics_base_class</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not detect inconsistent type variable ordering.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not reject illegal use of Generic.</p><p>Does not allow using generic in assert_type expression.</p><p>Does not detect inconsistent type variable ordering.</p></span></div></th>
</tr>
<tr><th class="column col1"> generics_basic</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>False positives in examples using constrained type variables.</p><p>False negative for constraint parameterized by a type variable.</p><p>False negative in custom map example.</p><p>False positive using `iter`.</p><p>False negative for bad type arguments to Generic/Protocol.</p><p>False negative for generic metaclass.</p></span></div></th>
</tr>
<tr><th class="column col1"> generics_defaults</th>
<th class="column col2 partially-conformant">Partial</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 not-conformant"><div class="hover-text">Unsupported<span class="tooltip-text" id="bottom"><p>Does not support generic defaults.</p></span></div></th>
</tr>
<tr><th class="column col1"> generics_defaults_referential</th>
<th class="column col2 partially-conformant">Partial</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 not-conformant">Unsupported</th>
</tr>
<tr><th class="column col1"> generics_defaults_specialization</th>
<th class="column col2 partially-conformant">Partial</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 not-conformant"><div class="hover-text">Unsupported<span class="tooltip-text" id="bottom"><p>Does not support generic defaults.</p></span></div></th>
</tr>
<tr><th class="column col1"> generics_paramspec_basic</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not enforce name consistency for ParamSpec assigned to identifier.</p><p>Incorrectly reports error for legitimate use of ParamSpec in generic type alias.</p><p>Does not reject ParamSpec when used in various invalid locations.</p></span></div></th>
</tr>
<tr><th class="column col1"> generics_paramspec_components</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not report illegal use of "P.args" on normal parameter.</p><p>Does not report error when P.args is specified but P.kwargs is missing.</p><p>Does not report error when P is out of scope and P.args and P.kwargs is used.</p><p>Does not report error when calling callback defined with ParamSpec with incorrect arguments.</p><p>Does not report error when keyword argument is specified between P.args and P.kwargs.</p><p>Does not report error when calling callable and argument is missing for concatenated parameters.</p></span></div></th>
</tr>
<tr><th class="column col1"> generics_paramspec_semantics</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant"><div class="hover-text">Pass*<span class="tooltip-text" id="bottom"><p>Constraint solver doesn't find common type for two signatures captured by a single ParamSpec (allowed).</p></span></div></th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column col1"> generics_paramspec_specialization</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Reports error for legitimate use of `...` to specialize ParamSpec</p></span></div></th>
</tr>
<tr><th class="column col1"> generics_scoping</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>False negative on generic class nested within generic class with same type variable.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>False negative on generic class nested within generic function with same type variable.</p><p>False negative on generic class nested within generic class with same type variable.</p><p>False negative on assert_type uses.</p></span></div></th>
</tr>
<tr><th class="column col1"> generics_self_advanced</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not infer the type of an unannotated `self` parameter to be type `Self`.</p><p>Does not retain `Self` when calling method that returns `Self`.</p><p>Does not infer the type of an unannotated `cls` parameter to be type `type[Self]`.</p><p>Does not retain `Self` when accessing attribute through `type[Self]`.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not handle use of `Self` within class body correctly.</p><p>False negatives on assert_type uses.</p></span></div></th>
</tr>
<tr><th class="column col1"> generics_self_attributes</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 not-conformant"><div class="hover-text">Unsupported<span class="tooltip-text" id="bottom"><p>Does not understand `Self` type.</p></span></div></th>
</tr>
<tr><th class="column col1"> generics_self_basic</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not handle use of `Self` as a generic type.</p></span></div></th>
</tr>
<tr><th class="column col1"> generics_self_protocols</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not reject protocol compatibility due to method `Self` return type.</p></span></div></th>
</tr>
<tr><th class="column col1"> generics_self_usage</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Complains in some cases when `self: Self` is used explicitly.</p><p>Does not complain when `Self` is used on a function outside any class definition.</p><p>Does not complain when `self` is annotated explicitly (without `Self`) and `Self` is returned.</p><p>Does not complain on inheritance involving `Self`.</p><p>Does not complain on use of `Self` in static methods.</p><p>Does not complain on use of `Self` in metaclasses.</p></span></div></th>
</tr>
<tr><th class="column col1"> generics_syntax_compatibility</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>False negative on mixing legacy and PEP695 syntax.</p><p>Does not detect mixing legacy and PEP695 syntax in methods.</p></span></div></th>
</tr>
<tr><th class="column col1"> generics_syntax_declarations</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not detect incorrect use of legacy style syntax mixed with PEP695 syntax.</p><p>False negatives due to assert_type use.</p></span></div></th>
</tr>
<tr><th class="column col1"> generics_syntax_infer_variance</th>
<th class="column col2 not-conformant"><div class="hover-text">Unsupported<span class="tooltip-text" id="bottom"><p>Type parameter syntax not yet support.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Incorrectly determines that a class cannot be instantiated with __getitem__.</p><p>Incorrectly handles mixing legacy and PEP695 syntax.</p></span></div></th>
</tr>
<tr><th class="column col1"> generics_syntax_scoping</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not following runtime scoping rules for type parameters in all cases.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not properly handle mixing legacy syntax with PEP695 syntax.</p></span></div></th>
</tr>
<tr><th class="column col1"> generics_type_erasure</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Infers Node[Never] instead of Node[Any] when argument is not provided.</p><p>False negative on instance attribute access on type(node).</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not erase unspecified type variables to `Any` prior to `assert_type` handling.</p><p>False negatives on instance attribute access on the type.</p><p>Does not infer type of `DefaultDict` with explicit type parameters on constructor.</p><p>False negatives on assert_type uses.</p></span></div></th>
</tr>
<tr><th class="column col1"> generics_typevartuple_args</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not enforce that tuples captured by TypeVarTuple are same type.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not property handle TypeVarTuple.</p></span></div></th>
</tr>
<tr><th class="column col1"> generics_typevartuple_basic</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not enforce that tuples captured by TypeVarTuple are same length.</p><p>Does not enforce that tuples captured by TypeVarTuple are same type.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not support TypeVarTuple.</p><p>False negatives due to assert_type.</p></span></div></th>
</tr>
<tr><th class="column col1"> generics_typevartuple_callable</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>False negatives due to assert_type.</p></span></div></th>
</tr>
<tr><th class="column col1"> generics_typevartuple_concat</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>False negatives due to assert_type.</p><p>False compatability error message.</p></span></div></th>
</tr>
<tr><th class="column col1"> generics_typevartuple_overloads</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 not-conformant"><div class="hover-text">Unsupported<span class="tooltip-text" id="bottom"><p>Does not support star expressions for `Unpack`.</p></span></div></th>
</tr>
<tr><th class="column col1"> generics_typevartuple_specialization</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Incorrectly specializes generic alias that includes a TypeVar and TypeVarTuple if no type arguments are provided.</p><p>Rejects specialization of generic type alias defined as a tuple containing a TypeVar.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 not-conformant"><div class="hover-text">Unsupported<span class="tooltip-text" id="bottom"><p>Does not support star expressions for `Unpack`.</p></span></div></th>
</tr>
<tr><th class="column col1"> generics_typevartuple_unpack</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column col1"> generics_upper_bound</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not reject use of type variable within an upper bound.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>False positives on valid type expression (`list[T]`) in `bound`.</p><p>Does not complain when bound is used alongside type constraints.</p></span></div></th>
</tr>
<tr><th class="column col1"> generics_variance</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not reject use of class-scoped TypeVar used in a base class when variance is incompatible.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not reject a TypeVar that is defined as both covariant and contravariant.</p><p>Does not reject use of class-scoped TypeVar used in a base class when variance is incompatible.</p></span></div></th>
</tr>
<tr><th class="column col1"> generics_variance_inference</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not properly handle mixing legacy and PEP695 syntax.</p><p>False negative about a type variable not being present in the function's parameters.</p></span></div></th>
</tr>
<tr><th class="column" colspan="4">
<a class="test_group" href="https://typing.readthedocs.io/en/latest/spec/qualifiers.html">Type qualifiers</a>
</th></tr>
<tr><th class="column col1"> qualifiers_annotated</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not allow ClassVar to be nested within Annotated.</p><p>Does not allow Final to be nested within Annotated.</p><p>Does not allow Required and NotRequired to be nested within Annotated.</p><p>Does not reject type[T] compatibility for type alias defined with Annotated.</p><p>Does not reject call of type alias defined with Annotated.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not reject Annotated with a single parameter.</p><p>Does not reject call of Annotated with no type arguments.</p></span></div></th>
</tr>
<tr><th class="column col1"> qualifiers_final_annotation</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not treat use of Final name as if it was replaced by the literal in NamedTuple definition.</p><p>Does not allow conditional assignment of Final instance variable in __init__ method.</p><p>Does not allow redefinition of private class variable that is marked Final in parent class.</p><p>Does not report modification of local Final variable via "for" statement.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not report Final variable with missing initialization in module scope.</p><p>Does not report error for invalid nesting of Final and ClassVar.</p><p>Does not treat use of Final name as if it was replaced by the literal in NamedTuple definition.</p><p>Does not reject modification of imported variable declared Final.</p></span></div></th>
</tr>
<tr><th class="column col1"> qualifiers_final_decorator</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Reports error for overloaded method implementation marked @final if its overloads do not.</p><p>Does not report error for overloaded @final method defined in stub file.</p><p>Reports misleading error when overload is marked @final but implementation is not.</p></span></div></th>
</tr>
<tr><th class="column" colspan="4">
<a class="test_group" href="https://typing.readthedocs.io/en/latest/spec/class-compat.html">Class type compatibility</a>
</th></tr>
<tr><th class="column col1"> classes_classvar</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Internal error if TypeVarTuple is used in ClassVar.</p><p>Does not reject use of ParamSpec in ClassVar.</p><p>Rejects ClassVar nested in Annotated.</p><p>Does not reject use of ClassVar in TypeAlias definition.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not reject use of TypeVar in ClassVar.</p><p>Does not reject use of ParamSpec in ClassVar.</p><p>Does not reject use of ClassVar as a generic type argument.</p><p>Does not reject use of ClassVar in parameter type annotation.</p><p>Does not reject use of ClassVar in local variable annotation.</p><p>Does not reject use of ClassVar in instance variable annotation.</p><p>Does not reject use of ClassVar in return type annotation.</p><p>Does not reject use of ClassVar in type alias definition.</p><p>Does not infer type from initialization for bare ClassVar.</p></span></div></th>
</tr>
<tr><th class="column col1"> classes_override</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column" colspan="4">
<a class="test_group" href="https://typing.readthedocs.io/en/latest/spec/aliases.html">Type aliases</a>
</th></tr>
<tr><th class="column col1"> aliases_explicit</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not reject specialization of type alias that has already been implicitly specialized.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Incorrectly reports error for type alias defined with ParamSpec.</p><p>Incorrectly rejects some valid type aliases when used in annotations.</p><p>Incorrectly evaluates generic type alias with ParamSpec with missing type argument.</p><p>Does not report some illegal annotation forms as invalid type aliases.</p><p>Does not report invalid specialization of generic type aliases.</p><p>Incorrectly rejects import alias of `TypeAlias` when used to define type alias.</p><p>Does not report invalid specialization of already-specialized generic type alias.</p></span></div></th>
</tr>
<tr><th class="column col1"> aliases_implicit</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Incorrectly reports error for type alias defined with ParamSpec.</p><p>Incorrectly rejects some valid type aliases when used in annotations.</p><p>Incorrectly evaluates generic type alias with ParamSpec with missing type argument.</p><p>Does not report invalid specialization of generic type aliases.</p><p>Does not report error for attempt to instantiate union type alias.</p><p>Does not report invalid specialization of already-specialized generic type alias.</p></span></div></th>
</tr>
<tr><th class="column col1"> aliases_newtype</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>`NewType`s are considered classes, not functions.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not reject use of NewType in `isinstance` call.</p><p>Does not reject use of NewType in class definition statement.</p><p>Does not report inconsistency between name of NewType and assigned identifier name.</p><p>Does not reject use of NewType with generic class with TypeVar.</p><p>Does not reject use of NewType with protocol class.</p><p>Does not reject use of NewType with TypedDict class.</p><p>Does not reject use of NewType with Any.</p></span></div></th>
</tr>
<tr><th class="column col1"> aliases_recursive</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not properly handle some recursive type aliases.</p><p>Does not properly handle specialization of generic recursive type aliases.</p></span></div></th>
</tr>
<tr><th class="column col1"> aliases_type_statement</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not reject type alias defined in function scope.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not complain when a type alias cannot be used as a base class.</p><p>Does not complain when a type alias cannot be used as a function.</p><p>Does not complain when a type statement definition combines new and old TypeVars.</p><p>Does not complain when a type statement definition uses old TypeVars.</p><p>Does not properly support recursive aliases.</p></span></div></th>
</tr>
<tr><th class="column col1"> aliases_typealiastype</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Incorrectly rejects some recursive type aliases using TypeAliasType.</p><p>Incorrectly rejects the use of a class-scoped TypeVar in a TypeAliasType definition.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 not-conformant"><div class="hover-text">Unsupported<span class="tooltip-text" id="bottom"><p>Support for TypeAliasType is not implemented.</p></span></div></th>
</tr>
<tr><th class="column col1"> aliases_variance</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column" colspan="4">
<a class="test_group" href="https://typing.readthedocs.io/en/latest/spec/literal.html">Literals</a>
</th></tr>
<tr><th class="column col1"> literals_interactions</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not narrow type of `x` with `x in Literal` type guard pattern.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not detect out-of-bound tuple literal index.</p><p>Does not perform exhaustiveness checks on enums.</p><p>Does not narrow type of `x` with `x in Literal` type guard pattern.</p><p>Does not narrow type of `x` with `x == Literal` type guard pattern.</p></span></div></th>
</tr>
<tr><th class="column col1"> literals_literalstring</th>
<th class="column col2 not-conformant"><div class="hover-text">Unsupported<span class="tooltip-text" id="bottom"><p>Support for `LiteralString` is not implemented.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Incorrectly infers `str` rather than `LiteralString` when literal string `join` is used.</p></span></div></th>
</tr>
<tr><th class="column col1"> literals_parameterizations</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not reject tuple within Literal.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not support type aliases in Literal type expression.</p><p>Does not support nested Literal type expression.</p><p>Does not reject tuple in Literal type expression.</p><p>Does not reject "bare" Literal in type expression.</p></span></div></th>
</tr>
<tr><th class="column col1"> literals_semantics</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column" colspan="4">
<a class="test_group" href="https://typing.readthedocs.io/en/latest/spec/protocol.html">Protocols</a>
</th></tr>
<tr><th class="column col1"> protocols_class_objects</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not reject protocol class assigned to type[Proto].</p><p>Incorrectly reports some class objects as incompatible with a protocol.</p><p>Fails to report some class objects as incompatible with a protocol.</p></span></div></th>
</tr>
<tr><th class="column col1"> protocols_definition</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not detect protocol mismatch if concrete method is missing annotations.</p><p>Does not detect protocol mismatch if concrete method's parameters are position-only.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not reject ClassVar in concrete class when attribute in protocol is not ClassVar or vice versa.</p><p>Does not reject read-only property in concrete class when attribute in protocol is mutable.</p><p>Does not reject covariant attribute type when protocol attribute is mutable.</p><p>Does not reject read-only property in concrete class when protocol has settable property.</p><p>Does not reject immutable named tuple attribute in concrete class when protocol attribute is mutable.</p><p>Does not reject immutable frozen dataclass attribute in concrete class when protocol attribute is mutable.</p></span></div></th>
</tr>
<tr><th class="column col1"> protocols_explicit</th>
<th class="column col2 conformant"><div class="hover-text">Pass*<span class="tooltip-text" id="bottom"><p>Does not report unimplemented attributes for class that explicitly derives from protocol until it is instantiated.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not report error when calling unimplemented protocol method from derived class.</p><p>Does not report error when method is not implemented in derived class.</p></span></div></th>
</tr>
<tr><th class="column col1"> protocols_generic</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not reject the use of Protocol and Generic together as base classes.</p><p>Does not detect protocol mismatch when method-scoped TypeVar is used in protocol.</p></span></div></th>
</tr>
<tr><th class="column col1"> protocols_merging</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column col1"> protocols_modules</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 not-conformant"><div class="hover-text">Unsupported<span class="tooltip-text" id="bottom"><p>Does not perform protocol checks for modules.</p></span></div></th>
</tr>
<tr><th class="column col1"> protocols_recursive</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column col1"> protocols_runtime_checkable</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not report unsafe overlap for runtime_checkable protocol.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 not-conformant"><div class="hover-text">Unsupported<span class="tooltip-text" id="bottom"><p>Does not reject isinstance or issubclass call for protocol that is not runtime_checkable.</p><p>Does not reject issubclass call for data protocol.</p><p>Does not report unsafe overlap for runtime_checkable protocol.</p></span></div></th>
</tr>
<tr><th class="column col1"> protocols_self</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column col1"> protocols_subtyping</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column col1"> protocols_variance</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 not-conformant"><div class="hover-text">Unsupported<span class="tooltip-text" id="bottom"><p>Does not detect incorrect TypeVar variance within generic protocols.</p></span></div></th>
</tr>
<tr><th class="column" colspan="4">
<a class="test_group" href="https://typing.readthedocs.io/en/latest/spec/callables.html">Callables</a>
</th></tr>
<tr><th class="column col1"> callables_annotation</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Incorrectly treats "*args: T, **kwargs: T" as "..." when T is specialized to Any.</p><p>Does not treat "*args: Any, **kargs: Any" as "..." when separated by keyword parameter.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not evaluate correct type for `*args: int` parameter.</p><p>Does not correctly implement type compatibility rules for "...".</p><p>Does not treat "*args: Any, **kwargs: Any" as "...".</p></span></div></th>
</tr>
<tr><th class="column col1"> callables_kwargs</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Allows callable without kwargs to be assigned to callable with unpacked kwargs</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column col1"> callables_protocol</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not correctly handle callback protocol that declares attributes in all functions.</p><p>Does not report type incompatibility for callback protocol with positional-only parameters.</p><p>Incorrectly reports type compatibility error with callback that has *args and **kwargs.</p><p>Does not report type incompatibility for callback missing a default argument for positional parameter.</p><p>Does not report type incompatibility for callback missing a default argument for keyword parameter.</p></span></div></th>
</tr>
<tr><th class="column col1"> callables_subtyping</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Rejects standard parameter as incompatible with keyword-only parameter.</p><p>Rejects use of Callable with ParamSpec in TypeAlias definition.</p></span></div></th>
</tr>
<tr><th class="column" colspan="4">
<a class="test_group" href="https://typing.readthedocs.io/en/latest/spec/constructors.html">Constructors</a>
</th></tr>
<tr><th class="column col1"> constructors_call_init</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not report errors during binding to self parameter of __init__ method.</p><p>Does not reject use of class-scoped type variables in annotation of self parameter in __init__ method.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not infer type of Self for self parameter of __init__ method.</p><p>Does not report errors during binding to self parameter of __init__ method.</p><p>Does not reject use of class-scoped type variables in annotation of self parameter in __init__ method.</p><p>Incorrectly raises Incompatible overload type errors.</p><p>Incorrectly raises compatibility type errors.</p></span></div></th>
</tr>
<tr><th class="column col1"> constructors_call_metaclass</th>
<th class="column col2 not-conformant"><div class="hover-text">Unupported<span class="tooltip-text" id="bottom"><p>Does not honor metaclass __call__ method when evaluating constructor call.</p><p>Does not skip evaluation of __new__ and __init__ if custom metaclass call returns non-class.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not evaluate __new__ if metaclass __call__ is defined.</p></span></div></th>
</tr>
<tr><th class="column col1"> constructors_call_new</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not support __new__ return type that is not a subclass of the class being constructed.</p><p>Does not skip evaluation of __init__ based on __new__ return type.</p><p>Does not report errors during binding to cls parameter of __new__ method.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not support __new__ return type that is not a subclass of the class being constructed.</p><p>Does not report errors during binding to cls parameter of __new__ method.</p><p>Incorrectly raises compatibility type errors.</p></span></div></th>
</tr>
<tr><th class="column col1"> constructors_call_type</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not validate call to custom metaclass __call__ method through type[T].</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column col1"> constructors_callable</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not generate a union type for __new__ and __init__ when converting class to callable.</p><p>Does not ignore __init__ based on __new__ return type when converting class to callable.</p><p>Does not support __new__ return type that is different from class being constructed.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not generate a union type for __new__ and __init__ when converting class to callable.</p><p>Does not ignore __init__ based on __new__ return type when converting class to callable.</p><p>Does not support __new__ return type that is different from class being constructed.</p><p>Does not use annotated type of self in __init__ method to generate return type of callable.</p><p>Incorrectly raises incompatibility type errors.</p></span></div></th>
</tr>
<tr><th class="column col1"> constructors_consistency</th>
<th class="column col2 conformant"><div class="hover-text">Pass*<span class="tooltip-text" id="bottom"><p>Does not report inconsistency between __new__ and __init__ (optional).</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant"><div class="hover-text">Pass*<span class="tooltip-text" id="bottom"><p>Does not report inconsistency between __new__ and __init__ (optional).</p></span></div></th>
</tr>
<tr><th class="column" colspan="4">
<a class="test_group" href="https://typing.readthedocs.io/en/latest/spec/overload.html">Overloads</a>
</th></tr>
<tr><th class="column col1"> overloads_basic</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column col1"> overloads_consistency</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not apply decorator transforms before checking overload consistency.</p></span></div></th>
</tr>
<tr><th class="column col1"> overloads_definitions</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Allows @override to be on all overloads and implementation, instead of just implementation.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not allow an overload with no implementation in a Protocol or an abstract base class.</p><p>Expects @final/@override on all overloads and implementation, instead of implementation only.</p></span></div></th>
</tr>
<tr><th class="column col1"> overloads_definitions_stub</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Allows @override to appear in a stub file not on the first overload.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Expects @final and @override to be present on all overloads, not just first.</p></span></div></th>
</tr>
<tr><th class="column col1"> overloads_evaluation</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not expand boolean arguments to Literal[True] and Literal[False].</p><p>Does not expand enum arguments to literal variants.</p><p>Does not expand tuple arguments to possible combinations.</p><p>Does not evaluate Any in some cases where overload is ambiguous.</p><p>Evaluates Any in some cases where overload is not ambiguous.</p></span></div></th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not evaluate Any in some cases where overload is ambiguous.</p></span></div></th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not expand boolean arguments to Literal[True] and Literal[False].</p><p>Does not expand enum arguments to literal variants.</p><p>Does not expand type[A | B] to type[A] and type[B].</p><p>Does not expand tuple arguments to possible combinations.</p><p>Does not prefer variadic match to indeterminate-length unpacked argument.</p><p>Does not treat multiple matches due to gradual types as ambiguous.</p></span></div></th>
</tr>
<tr><th class="column" colspan="4">
<a class="test_group" href="https://typing.readthedocs.io/en/latest/spec/exceptions.html">Exceptions</a>
</th></tr>
<tr><th class="column col1"> exceptions_context_managers</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>assert_type causes failures.</p></span></div></th>
</tr>
<tr><th class="column" colspan="4">
<a class="test_group" href="https://typing.readthedocs.io/en/latest/spec/dataclasses.html">Dataclasses</a>
</th></tr>
<tr><th class="column col1"> dataclasses_descriptors</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not correctly evaluate type of descriptor access.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Incorrectly generates error when calling constructor of dataclass with descriptor.</p><p>Incorrectly raises incompatibility type errors.</p></span></div></th>
</tr>
<tr><th class="column col1"> dataclasses_final</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Wrongly requires a Final dataclass field to be initialized at class level.</p><p>Doesn't support Final nested inside ClassVar.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column col1"> dataclasses_frozen</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column col1"> dataclasses_hash</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not report when dataclass is not compatible with Hashable protocol.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not report when dataclass is not compatible with Hashable protocol.</p></span></div></th>
</tr>
<tr><th class="column col1"> dataclasses_inheritance</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not reject ClassVar that is overridden by instance variable.</p><p>Does not reject instance variable that is overridden by ClassVar.</p></span></div></th>
</tr>
<tr><th class="column col1"> dataclasses_kwonly</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Incorrectly rejects kw_only field with default before positional field.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Rejects legitimate use of dataclass field with `kw_only=True`.</p></span></div></th>
</tr>
<tr><th class="column col1"> dataclasses_order</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column col1"> dataclasses_postinit</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not perform validation of `__post_init__` method.</p><p>Incorrectly complains on the assignment of `InitVar` in class bodies.</p></span></div></th>
</tr>
<tr><th class="column col1"> dataclasses_slots</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not reject write to instance variable that is not defined in __slots__.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not report error when `slots=True` is used with `__slots__` definition.</p><p>Does not reject write to instance variable that is not defined in __slots__.</p><p>Does not reject access to `__slots__` from dataclass instance when `slots=False`.</p></span></div></th>
</tr>
<tr><th class="column col1"> dataclasses_transform_class</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not support field specifiers.</p><p>Emits "attribute not initialized" error for dataclass field.</p></span></div></th>
</tr>
<tr><th class="column col1"> dataclasses_transform_converter</th>
<th class="column col2 not-conformant"><div class="hover-text">Unsupported<span class="tooltip-text" id="bottom"><p>Converter parameter not yet supported.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 not-conformant"><div class="hover-text">Unsupported<span class="tooltip-text" id="bottom"><p>Converter parameter not yet supported.</p></span></div></th>
</tr>
<tr><th class="column col1"> dataclasses_transform_field</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not properly handle field constructor that has default value for `kw_only` or `init` parameter.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 not-conformant"><div class="hover-text">Unsupported<span class="tooltip-text" id="bottom"><p>Does not understand dataclass transform field specifiers.</p></span></div></th>
</tr>
<tr><th class="column col1"> dataclasses_transform_func</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not handle `kw_only=False` override when `kw_only_default=True`.</p><p>Does not report error when `order=False` and comparison operators are used.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not understand @dataclass_transform when it is applied only to overloads of a decorator but not the definition.</p><p>Does not detect non-frozen class inheriting from frozen class.</p><p>Emits "attribute not initialized" error for dataclass field.</p></span></div></th>
</tr>
<tr><th class="column col1"> dataclasses_transform_meta</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not understand custom field specifiers.</p><p>Incorrectly rejects frozen dataclass that inherits from non-frozen.</p><p>Emits "attribute not initialized" error for dataclass field.</p></span></div></th>
</tr>
<tr><th class="column col1"> dataclasses_usage</th>
<th class="column col2 conformant"><div class="hover-text">Pass*<span class="tooltip-text" id="bottom"><p>Does not detect unannotated usage of `dataclasses.field()`.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not report error when field with no default follows field with default.</p><p>Complains on `assert_type` when used for bound methods vs `Callable`.</p><p>Does not understand `__dataclass_fields__`.</p><p>Incorrectly raises incompatibility type errors.</p></span></div></th>
</tr>
<tr><th class="column" colspan="4">
<a class="test_group" href="https://typing.readthedocs.io/en/latest/spec/typeddict.html">Typed dictionaries</a>
</th></tr>
<tr><th class="column col1"> typeddicts_alt_syntax</th>
<th class="column col2 conformant"><div class="hover-text">Pass*<span class="tooltip-text" id="bottom"><p>Does not support keyword-argument form of alternative syntax (deprecated in 3.11).</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not report when name of TypedDict doesn't match assigned identifier name.</p><p>Does not support keyword-argument form of alternative syntax (deprecated in 3.11).</p></span></div></th>
</tr>
<tr><th class="column col1"> typeddicts_class_syntax</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not reject methods within TypedDict class.</p><p>Does not report when metaclass is provided.</p><p>Does not report when other keyword argument is provided.</p><p>Does not support generic TypedDict class.</p></span></div></th>
</tr>
<tr><th class="column col1"> typeddicts_final</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not handle value with literal type as index to TypedDict object.</p></span></div></th>
</tr>
<tr><th class="column col1"> typeddicts_inheritance</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column col1"> typeddicts_operations</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column col1"> typeddicts_readonly</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column col1"> typeddicts_readonly_consistency</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column col1"> typeddicts_readonly_inheritance</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Incorrectly rejects non-ReadOnly override of ReadOnly item.</p><p>Incorrectly rejects override of ReadOnly item with another ReadOnly item with narrower type.</p><p>Incorrectly rejects override of NotRequired ReadOnly item with a Required ReadOnly item.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 not-conformant">Unsupported</th>
</tr>
<tr><th class="column col1"> typeddicts_readonly_kwargs</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column col1"> typeddicts_readonly_update</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Incorrectly allows update of ReadOnly item.</p><p>Incorrectly rejects update involving an item with Never type.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column col1"> typeddicts_required</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not reject use of `Required` in function parameter annotation.</p><p>Does not reject nested use of `Required` in type annotation.</p><p>Does not support recursive TypedDict definitions.</p><p>Incorrectly complains about uninitialized attributes on TypedDict definitions.</p><p>Incorrectly generates "attribute not initialized" errors for TypedDict fields.</p></span></div></th>
</tr>
<tr><th class="column col1"> typeddicts_type_consistency</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not reject assignment of TypedDict with missing key.</p><p>Does not return non-Optional value from `get` method for required key.</p><p>Does not properly handle nested TypedDicts.</p></span></div></th>
</tr>
<tr><th class="column col1"> typeddicts_usage</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant"><div class="hover-text">Pass*<span class="tooltip-text" id="bottom"><p>Does not report errant use of TypedDict in `isinstance` call.</p><p>Does not reject use of TypedDict as TypeVar bound.</p></span></div></th>
</tr>
<tr><th class="column" colspan="4">
<a class="test_group" href="https://typing.readthedocs.io/en/latest/spec/tuples.html">Tuples</a>
</th></tr>
<tr><th class="column col1"> tuples_type_compat</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not support tuple narrowing based on `len()` type guard (optional).</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not support some unpacked tuple forms.</p><p>Does not report type violation when assigning `tuple[int, ...]` to `tuple[int]`.</p><p>Does not support tuple narrowing based on `len()` type guard (optional).</p><p>Does not correctly evaluate `Sequence[Never]` for `tuple[()]`.</p></span></div></th>
</tr>
<tr><th class="column col1"> tuples_type_form</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column col1"> tuples_unpacked</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>"More than one unpack" error is missing in some cases.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column" colspan="4">
<a class="test_group" href="https://typing.readthedocs.io/en/latest/spec/namedtuples.html">Named tuples</a>
</th></tr>
<tr><th class="column col1"> namedtuples_define_class</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not reject override of named tuple attribute in child class.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not evaluate correct type for indexed named tuple instance with integer.</p><p>Does not evaluate correct type for indexed named tuple instance with slice.</p><p>Does not report out-of-range index access with named tuple instance.</p><p>Does not reject named tuple element with no default value after one with a default.</p><p>Incorrectly rejects assignment of named tuple to a tuple with compatible type.</p><p>Does not reject attempt to use NamedTuple with multiple inheritance.</p></span></div></th>
</tr>
<tr><th class="column col1"> namedtuples_define_functional</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column col1"> namedtuples_type_compat</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column col1"> namedtuples_usage</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not reject attempt to delete named tuple field by name.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 partially-conformant">Partial</th>
</tr>
<tr><th class="column" colspan="4">
<a class="test_group" href="https://typing.readthedocs.io/en/latest/spec/enums.html">Enumerations</a>
</th></tr>
<tr><th class="column col1"> enums_behaviors</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column col1"> enums_definition</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column col1"> enums_expansion</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Improperly applies narrowing to Flag subclass.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column col1"> enums_member_names</th>
<th class="column col2 conformant"><div class="hover-text">Pass*<span class="tooltip-text" id="bottom"><p>Does not support special-cased handling of member name literal types in some cases (optional).</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant"><div class="hover-text">Pass*<span class="tooltip-text" id="bottom"><p>Does not support special-cased handling of member name literal types (optional).</p></span></div></th>
</tr>
<tr><th class="column col1"> enums_member_values</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not enforce declared type of `_value_`.</p><p>Does not enforce assigned tuple types for enum members (optional).</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column col1"> enums_members</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not treat attribute with annotation and no assignment as non-member.</p><p>Does not treat callables as non-members.</p><p>Does not honor `enum.member` as method decorator.</p><p>Does not properly handle aliased enum members.</p><p>Does not support `_ignore_` mechanism (optional).</p><p>Does not treat attributes with private names as non-members.</p></span></div></th>
<th class="column col2 conformant"><div class="hover-text">Pass*<span class="tooltip-text" id="bottom"><p>Does not support `_ignore_` mechanism (optional).</p></span></div></th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not reject use of annotation with enum member.</p><p>Does not treat callables as non-members.</p><p>Does not treat annotated attributes as non-members.</p><p>Does not honor `enum.nonmember` to define non-member attribute.</p><p>Does not honor `enum.member` as method decorator.</p><p>Does not properly handle aliased enum members.</p><p>Rejects use of `_ignore_`.</p><p>Does not support `_ignore_` mechanism (optional).</p></span></div></th>
</tr>
<tr><th class="column" colspan="4">
<a class="test_group" href="https://typing.readthedocs.io/en/latest/spec/narrowing.html">Type narrowing</a>
</th></tr>
<tr><th class="column col1"> narrowing_typeguard</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column col1"> narrowing_typeis</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column" colspan="4">
<a class="test_group" href="https://typing.readthedocs.io/en/latest/spec/directives.html">Type checker directives</a>
</th></tr>
<tr><th class="column col1"> directives_assert_type</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column col1"> directives_cast</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column col1"> directives_deprecated</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 not-conformant"><div class="hover-text">Unsupported<span class="tooltip-text" id="bottom"><p>Does not support @deprecated.</p></span></div></th>
</tr>
<tr><th class="column col1"> directives_no_type_check</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not honor `@no_type_check` class decorator (allowed).</p><p>Does not reject invalid call of `@no_type_check` function.</p></span></div></th>
<th class="column col2 conformant"><div class="hover-text">Pass*<span class="tooltip-text" id="bottom"><p>Does not honor `@no_type_check` class decorator (allowed).</p></span></div></th>
<th class="column col2 conformant"><div class="hover-text">Pass*<span class="tooltip-text" id="bottom"><p>Does not honor @no_type_check decorator.</p></span></div></th>
</tr>
<tr><th class="column col1"> directives_reveal_type</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column col1"> directives_type_checking</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column col1"> directives_type_ignore</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not honor "# type: ignore" comment if comment includes additional text.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column col1"> directives_type_ignore_file1</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column col1"> directives_type_ignore_file2</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column col1"> directives_version_platform</th>
<th class="column col2 conformant"><div class="hover-text">Pass*<span class="tooltip-text" id="bottom"><p>Does not understand three-element form of sys.version checks.</p><p>Does not understand os.name checks.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
<tr><th class="column" colspan="4">
<a class="test_group" href="https://typing.readthedocs.io/en/latest/spec/historical.html">Historical and deprecated features</a>
</th></tr>
<tr><th class="column col1"> historical_positional</th>
<th class="column col2 partially-conformant"><div class="hover-text">Partial<span class="tooltip-text" id="bottom"><p>Does not reject positional-only parameter after non-positional-only parameter.</p><p>Treats keyword-only parameter as positional-only.</p><p>Applies legacy positional-only rules when PEP 570 syntax is used.</p></span></div></th>
<th class="column col2 conformant">Pass</th>
<th class="column col2 conformant">Pass</th>
</tr>
</tbody></table></div>
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