Erased casts supported

compiler/frontend/src/org/jetbrains/jet/lang/types/CastDiagnosticsUtil.java

@@ -1,6 +1,8 @@
 package org.jetbrains.jet.lang.types;
 
+import com.google.common.base.Predicate;
 import com.google.common.collect.Lists;
+import com.google.common.collect.Maps;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.jet.lang.PlatformToKotlinClassMap;
 import org.jetbrains.jet.lang.descriptors.ClassDescriptor;
@@ -8,10 +10,12 @@ import org.jetbrains.jet.lang.descriptors.ClassKind;
 import org.jetbrains.jet.lang.descriptors.ClassifierDescriptor;
 import org.jetbrains.jet.lang.descriptors.TypeParameterDescriptor;
 import org.jetbrains.jet.lang.types.checker.JetTypeChecker;
+import org.jetbrains.jet.lang.types.checker.TypeCheckingProcedure;
 
 import java.util.Collection;
 import java.util.Collections;
 import java.util.List;
+import java.util.Map;
 
 public class CastDiagnosticsUtil {
 
@@ -44,11 +48,8 @@ public class CastDiagnosticsUtil {
         List<JetType> aTypes = mapToPlatformIndependentTypes(a, platformToKotlinClassMap);
         List<JetType> bTypes = mapToPlatformIndependentTypes(b, platformToKotlinClassMap);
 
-        for (int i = 0; i < aTypes.size(); i++) {
-            JetType aType = aTypes.get(i);
-            for (int j = 0; j < bTypes.size(); j++) {
-                JetType bType = bTypes.get(j);
-
+        for (JetType aType : aTypes) {
+            for (JetType bType : bTypes) {
                 if (JetTypeChecker.INSTANCE.isSubtypeOf(aType, bType)) return true;
                 if (JetTypeChecker.INSTANCE.isSubtypeOf(bType, aType)) return true;
             }
@@ -91,5 +92,82 @@ public class CastDiagnosticsUtil {
         return descriptor instanceof ClassDescriptor && ((ClassDescriptor) descriptor).getKind() == ClassKind.TRAIT;
     }
 
+    /**
+     * Check if cast from supertype to subtype is erased.
+     * It is an error in "is" statement and warning in "as".
+     */
+    public static boolean isCastErased(@NotNull JetType supertype, @NotNull JetType subtype, @NotNull JetTypeChecker typeChecker) {
+        // cast between T and T? is always OK
+        if (supertype.isNullable() || subtype.isNullable()) {
+            return isCastErased(TypeUtils.makeNotNullable(supertype), TypeUtils.makeNotNullable(subtype), typeChecker);
+        }
+
+        // if it is a upcast, it's never erased
+        if (typeChecker.isSubtypeOf(supertype, subtype)) return false;
+
+        // downcasting to a type parameter is always erased
+        if (isTypeParameter(subtype)) return true;
+
+        // Check that we are actually casting to a generic type
+        // NOTE: this does not account for 'as Array<List<T>>'
+        if (allParametersReified(subtype)) return false;
+
+        // Assume we are casting an expression of type Collection<Foo> to List<Bar>
+        // First, let's make List<T>, where T is a type variable
+        JetType subtypeWithVariables = TypeUtils.makeUnsubstitutedType(
+                subtype.getConstructor(),
+                ErrorUtils.createErrorScope("Scope for intermediate type. This type shouldn't be used outside isCastErased()", true));
+
+        // Now, let's find a supertype of List<T> that is a Collection of something,
+        // in this case it will be Collection<T>
+        JetType supertypeWithVariables = TypeCheckingProcedure.findCorrespondingSupertype(subtypeWithVariables, supertype);
+        if (supertypeWithVariables == null) return true;
+
+        // Now, let's try to unify Collection<T> and Collection<Foo>
+        // solution is a map from T to Foo
+        final List<TypeParameterDescriptor> variables = subtypeWithVariables.getConstructor().getParameters();
+        TypeUnifier.UnificationResult solution = TypeUnifier.unify(
+                new TypeProjection(supertype), new TypeProjection(supertypeWithVariables),
+                new Predicate<TypeConstructor>() {
+                    @Override
+                    public boolean apply(TypeConstructor typeConstructor) {
+                        ClassifierDescriptor descriptor = typeConstructor.getDeclarationDescriptor();
+                        return descriptor instanceof TypeParameterDescriptor && variables.contains(descriptor);
+                    }
+                });
+
+        // If some of the parameters are not determined by unification, it means that these parameters are lost,
+        // let's put stars instead, so that we can only cast to something like List<*>, e.g. (a: Any) as List<*>
+        Map<TypeConstructor, TypeProjection> substitution = Maps.newHashMap(solution.getSubstitution());
+        for (TypeParameterDescriptor variable : variables) {
+            TypeProjection value = substitution.get(variable.getTypeConstructor());
+            if (value == null) {
+                substitution.put(
+                        variable.getTypeConstructor(),
+                        SubstitutionUtils.makeStarProjection(variable)
+                );
+            }
+        }
+
+        // At this point we have values for all type parameters of List
+        // Let's make a type by substituting them: List<T> -> List<Foo>
+        JetType staticallyKnownSubtype = TypeSubstitutor.create(substitution).substitute(subtypeWithVariables, Variance.INVARIANT);
+
+        // If the substitution failed, it means that the result is an impossible type, e.g. something like Out<in Foo>
+        // In this case, we can't guarantee anything, so the cast is considered to be erased
+        if (staticallyKnownSubtype == null) return true;
+
+        // If the type we calculated is a subtype of the cast target, it's OK to use the cast target instead.
+        // If not, it's wrong to use it
+        return !typeChecker.isSubtypeOf(staticallyKnownSubtype, subtype);
+    }
+
+    private static boolean allParametersReified(JetType subtype) {
+        for (TypeParameterDescriptor parameterDescriptor : subtype.getConstructor().getParameters()) {
+            if (!parameterDescriptor.isReified()) return false;
+        }
+        return true;
+    }
+
     private CastDiagnosticsUtil() {}
 }

compiler/frontend/src/org/jetbrains/jet/lang/types/TypeUtils.java

@@ -353,13 +353,18 @@ public class TypeUtils {
 
     @NotNull
     public static JetType makeUnsubstitutedType(ClassDescriptor classDescriptor, JetScope unsubstitutedMemberScope) {
-        if (ErrorUtils.isError(classDescriptor)) {
-            return ErrorUtils.createErrorType("Unsubstituted type for " + classDescriptor);
+        return makeUnsubstitutedType(classDescriptor.getTypeConstructor(), unsubstitutedMemberScope);
+    }
+
+    @NotNull
+    public static JetType makeUnsubstitutedType(TypeConstructor typeConstructor, JetScope unsubstitutedMemberScope) {
+        if (ErrorUtils.isError(typeConstructor)) {
+            return ErrorUtils.createErrorType("Unsubstituted type for " + typeConstructor);
         }
-        List<TypeProjection> arguments = getDefaultTypeProjections(classDescriptor.getTypeConstructor().getParameters());
+        List<TypeProjection> arguments = getDefaultTypeProjections(typeConstructor.getParameters());
         return new JetTypeImpl(
                 Collections.<AnnotationDescriptor>emptyList(),
-                classDescriptor.getTypeConstructor(),
+                typeConstructor,
                 false,
                 arguments,
                 unsubstitutedMemberScope

compiler/frontend/src/org/jetbrains/jet/lang/types/expressions/BasicExpressionTypingVisitor.java

@@ -17,7 +17,6 @@
 package org.jetbrains.jet.lang.types.expressions;
 
 import com.google.common.collect.Lists;
-import com.google.common.collect.Multimap;
 import com.intellij.psi.PsiElement;
 import com.intellij.psi.tree.IElementType;
 import org.jetbrains.annotations.NotNull;
@@ -57,7 +56,6 @@ import org.jetbrains.jet.lang.resolve.scopes.receivers.ReceiverValue;
 import org.jetbrains.jet.lang.resolve.scopes.receivers.TransientReceiver;
 import org.jetbrains.jet.lang.types.*;
 import org.jetbrains.jet.lang.types.checker.JetTypeChecker;
-import org.jetbrains.jet.lang.types.checker.TypeCheckingProcedure;
 import org.jetbrains.jet.lang.types.lang.KotlinBuiltIns;
 import org.jetbrains.jet.lexer.JetTokens;
 import org.jetbrains.jet.utils.ThrowingList;
@@ -235,156 +233,13 @@ public class BasicExpressionTypingVisitor extends ExpressionTypingVisitor {
                 context.trace.report(USELESS_CAST.on(expression.getOperationReference()));
             }
             else {
-                if (isCastErased(actualType, targetType, typeChecker)) {
+                if (CastDiagnosticsUtil.isCastErased(actualType, targetType, typeChecker)) {
                     context.trace.report(Errors.UNCHECKED_CAST.on(expression, actualType, targetType));
                 }
             }
         }
     }
 
-    /**
-     * Check if assignment from supertype to subtype is erased.
-     * It is an error in "is" statement and warning in "as".
-     */
-    public static boolean isCastErased(@NotNull JetType supertype, @NotNull JetType subtype, @NotNull JetTypeChecker typeChecker) {
-        if (!(subtype.getConstructor().getDeclarationDescriptor() instanceof ClassDescriptor)) {
-            // TODO: what if it is TypeParameterDescriptor?
-            return false;
-        }
-
-        // do not crash on error types
-        if (ErrorUtils.isErrorType(supertype) || ErrorUtils.isErrorType(subtype)) {
-            return false;
-        }
-
-        return hasDowncastsInTypeArguments(supertype, subtype, typeChecker) || hasErasedTypeArguments(supertype, subtype);
-    }
-
-    /*
-      Check if type arguments are downcasted, which cannot be checked at run-time.
-
-      Examples:
-      1. a: MutableList<out Any> is MutableList<String> - true, because 'String' is more specific
-      2. a: Collection<String> is List<Any> - false, because 'Any' is less specific, and it is guaranteed by static checker
-      3. a: MutableCollection<String> is MutableList<Any> - false, because these types have empty intersection (type parameter is invariant)
-     */
-    private static boolean hasDowncastsInTypeArguments(
-            @NotNull JetType supertype,
-            @NotNull JetType subtype,
-            @NotNull JetTypeChecker typeChecker
-    ) {
-        List<TypeParameterDescriptor> superParameters = supertype.getConstructor().getParameters();
-
-        // This map holds arguments for type parameters of all superclasses of a type (see method comment for sample)
-        Multimap<TypeConstructor, TypeProjection> subtypeSubstitutionMap = SubstitutionUtils.buildDeepSubstitutionMultimap(subtype);
-
-        for (int i = 0; i < superParameters.size(); i++) {
-            TypeProjection superArgument = supertype.getArguments().get(i);
-            TypeParameterDescriptor parameter = superParameters.get(i);
-
-            if (parameter.isReified()) {
-                continue;
-            }
-
-            Collection<TypeProjection> substituted = subtypeSubstitutionMap.get(parameter.getTypeConstructor());
-            for (TypeProjection substitutedArgument : substituted) {
-                // For sample #2 (a: Collection<String> is List<Any>):
-                // parameter = E declared in Collection
-                // superArgument = String
-                // substitutedArgument = Any, because Collection<Any> is the supertype of List<Any>
-
-                // 1. Any..Nothing
-                // 2. String..Nothing
-                // 3. String..String
-                JetType superOut = TypeCheckingProcedure.getOutType(parameter, superArgument);
-                JetType superIn = TypeCheckingProcedure.getInType(parameter, superArgument);
-
-                // 1. String..String
-                // 2. Any..Nothing
-                // 3. Any..Any
-                JetType subOut = TypeCheckingProcedure.getOutType(parameter, substitutedArgument);
-                JetType subIn = TypeCheckingProcedure.getInType(parameter, substitutedArgument);
-
-                // super type range must be a subset of sub type range
-                if (typeChecker.isSubtypeOf(superOut, subOut) && typeChecker.isSubtypeOf(subIn, superIn)) {
-                    // continue
-                }
-                else {
-                    return true;
-                }
-            }
-        }
-
-        return false;
-    }
-
-    /*
-      Check if type arguments are erased, that is they are not mapped to type parameters of supertype's class
-
-      Examples (MyMap is defined like this: trait MyMap<T>: Map<String, T>):
-      1. a: Any is List<String> - true
-      2. a: Collection<CharSequence> is List<String> - false
-      3. a: Map<String, String> is MyMap<String> - false
-     */
-    private static boolean hasErasedTypeArguments(
-            @NotNull JetType supertype,
-            @NotNull JetType subtype
-    ) {
-        // Erase all type arguments, replacing them with unsubstituted versions:
-        // 1. List<E>
-        // 2. List<E>
-        // 3. MyMap<T>
-        JetType subtypeCleared = TypeUtils.makeUnsubstitutedType(
-                (ClassDescriptor) subtype.getConstructor().getDeclarationDescriptor(), null);
-
-        // This map holds arguments for type parameters of all superclasses of a type (see method comment for sample)
-        // For all "E" declared in Collection, Iterable, etc., value will be type "E", where the latter E is declared in List
-        Multimap<TypeConstructor, TypeProjection> clearTypeSubstitutionMap =
-                SubstitutionUtils.buildDeepSubstitutionMultimap(subtypeCleared);
-
-
-        // This set will contain all arguments for type parameters of superclass which are mapped from type parameters of subtype's class
-        // 1. empty
-        // 2. [E declared in List]
-        // 3. [T declared in MyMap]
-        Set<JetType> clearSubstituted = new HashSet<JetType>();
-
-        List<TypeParameterDescriptor> superParameters = supertype.getConstructor().getParameters();
-        for (TypeParameterDescriptor superParameter : superParameters) {
-            Collection<TypeProjection> substituted = clearTypeSubstitutionMap.get(superParameter.getTypeConstructor());
-            for (TypeProjection substitutedProjection : substituted) {
-                clearSubstituted.add(substitutedProjection.getType());
-            }
-        }
-
-        // For each type parameter of subtype's class, we check that it is mapped to type parameters of supertype,
-        // that is its type is present in clearSubstituted set
-        List<TypeParameterDescriptor> subParameters = subtype.getConstructor().getParameters();
-        for (int i = 0; i < subParameters.size(); i++) {
-            TypeParameterDescriptor parameter = subParameters.get(i);
-            TypeProjection argument = subtype.getArguments().get(i);
-
-            if (parameter.isReified()) {
-                continue;
-            }
-
-            // "is List<*>", no check for type argument, actually
-            if (argument.equals(SubstitutionUtils.makeStarProjection(parameter))) {
-                continue;
-            }
-
-            // if parameter is mapped to nothing then it is erased
-            // 1. return from here
-            // 2. contains = true, don't return
-            // 3. contains = true, don't return
-            if (!clearSubstituted.contains(parameter.getDefaultType())) {
-                return true;
-            }
-        }
-
-        return false;
-    }
-
     @Override
     public JetTypeInfo visitThisExpression(JetThisExpression expression, ExpressionTypingContext context) {
         JetType result = null;

compiler/frontend/src/org/jetbrains/jet/lang/types/expressions/PatternMatchingTypingVisitor.java

@@ -285,7 +285,7 @@ public class PatternMatchingTypingVisitor extends ExpressionTypingVisitor {
             context.trace.report(Errors.USELESS_NULLABLE_CHECK.on(nullableType));
         }
         checkTypeCompatibility(context, type, subjectType, typeReferenceAfterIs);
-        if (BasicExpressionTypingVisitor.isCastErased(subjectType, type, JetTypeChecker.INSTANCE)) {
+        if (CastDiagnosticsUtil.isCastErased(subjectType, type, JetTypeChecker.INSTANCE)) {
             context.trace.report(Errors.CANNOT_CHECK_FOR_ERASED.on(typeReferenceAfterIs, type));
         }
         return new DataFlowInfos(context.dataFlowInfo.establishSubtyping(subjectDataFlowValue, type), context.dataFlowInfo);

compiler/testData/diagnostics/tests/cast/DowncastMap.kt

@@ -0,0 +1,10 @@
+trait Map<K, out V>
+trait MutableMap<K, V>: Map<K, V> {
+  fun set(k: K, v: V)
+}
+
+fun p(p: Map<String, Int>) {
+    if (p is MutableMap<String, Int>) {
+        p[""] = 1
+    }
+}

compiler/testData/diagnostics/tests/cast/IsArray.kt

@@ -0,0 +1 @@
+fun f(a: Array<out Number>) = a is Array<Int>

compiler/testData/diagnostics/tests/cast/IsErasedAllowForDerivedWithOneSubstitutedAndOneSameGeneric.kt

@@ -0,0 +1,5 @@
+open class BaseTwo<A, B>
+open class DerivedWithOne<D>: BaseTwo<D, String>()
+
+// a is BaseTwo<T, U> => if (a is DerivedWithOne<?>) a is DerivedWithOne<T>
+fun <T, U> testing(a: BaseTwo<T, U>) = a is DerivedWithOne<T>

compiler/testData/diagnostics/tests/cast/IsErasedAllowForExactSupertypeCheck.kt

@@ -0,0 +1,5 @@
+open class Base<A>
+class Some: Base<Int>()
+
+// a is Some => a is Base<Int>
+fun f(a: Some) = a is Base<Int>

compiler/testData/diagnostics/tests/cast/IsErasedAllowForOverridenVarianceWithProjection.kt

@@ -0,0 +1,8 @@
+open class A
+open class B: A()
+
+open class Base<out T>
+open class SubBase<T> : Base<T>()
+
+// l is Base<+B> => if (l is SubBase<?>) l is SubBase<+B> => l is SubBase<+A>
+fun ff(l: Base<B>) = l is SubBase<out A>

compiler/testData/diagnostics/tests/cast/IsErasedAllowForSupertypeCheckWithContrvariance.kt

@@ -0,0 +1,8 @@
+open class A
+open class B: A()
+
+open class Base<in T>
+class SubBase: Base<A>()
+
+// f is SubBase => f is Base<A> => (Base<Contravariant T>, B <: A) f is Base<B>
+fun test(f: SubBase) = f is Base<B>

compiler/testData/diagnostics/tests/cast/IsErasedAllowForSupertypeCheckWithCovariance.kt

@@ -0,0 +1,8 @@
+open class A
+open class B: A()
+
+open class Base<out T>
+class SubBase: Base<B>()
+
+// f is SubBase => (SubBase <: Base<B>) f is Base<B> => (B <: A, Base<Covariant T> => SubBase <: Base<A>) f is Base<A>
+fun test(f: SubBase) = f is Base<A>

compiler/testData/diagnostics/tests/cast/IsErasedAllowForTypeWithIrrelevantMixin.kt

@@ -0,0 +1,9 @@
+trait A
+trait B: A
+trait D
+
+trait BaseSuper<T>
+trait BaseImpl: BaseSuper<D>
+trait DerivedSuper<out S>: <!INCONSISTENT_TYPE_PARAMETER_VALUES!>BaseSuper<S>, BaseImpl<!>
+
+fun test(t: BaseSuper<B>) = t is DerivedSuper<A>

compiler/testData/diagnostics/tests/cast/IsErasedAllowForTypeWithTwoSameTypeSubstitutions.kt

@@ -0,0 +1,6 @@
+open class BaseMulti<out A, B>
+class SomeMultiDerived<out D>: BaseMulti<D, Any>()
+
+// t is BaseMulti<+String, String> => if (t is SomeMultiDerived<?>) => t is SomeMultiDerived<+String> =>
+//     => (String <: Any, SomeMultiDerived<Covariant D>) t is SomeMultiDerived<+Any>
+fun someDerived(t: BaseMulti<String, String>) = t is SomeMultiDerived<Any>

compiler/testData/diagnostics/tests/cast/IsErasedAllowForTypeWithoutTypeArguments.kt

@@ -0,0 +1,5 @@
+open class Base<A>
+class Some: Base<Int>()
+
+// No erased types in check
+fun <A> f(a: Base<A>) = a is Some

compiler/testData/diagnostics/tests/cast/IsErasedDisallowForOverridenVariance.kt

@@ -0,0 +1,8 @@
+open class A
+open class B: A()
+
+open class Base<out T>
+open class SubBase<T> : Base<T>()
+
+
+fun ff(l: Base<B>) = l is <!CANNOT_CHECK_FOR_ERASED!>SubBase<A><!>

compiler/testData/diagnostics/tests/cast/IsErasedDisallowForTypeWithConstraints.kt

@@ -0,0 +1,6 @@
+trait A
+trait B: A
+
+trait Base<T>
+
+fun <T> test(a: Base<B>) where T: Base<A> = a is <!CANNOT_CHECK_FOR_ERASED!>T<!>

compiler/testData/diagnostics/tests/cast/IsErasedDissallowForSubtypeMappedToTwoParamsWithFirstInvalid.kt

@@ -0,0 +1,8 @@
+open class A
+open class B: A()
+open class D
+
+open class Base<out T, out U>
+open class Derived<out S>: Base<S, S>()
+
+fun test(a: Base<D, B>) = a is <!CANNOT_CHECK_FOR_ERASED!>Derived<A><!>

compiler/testData/diagnostics/tests/cast/IsErasedDissallowForSubtypeMappedToTwoParamsWithSecondInvalid.kt

@@ -0,0 +1,8 @@
+open class A
+open class B: A()
+open class D
+
+open class Base<out T, out U>
+open class Derived<out S>: Base<S, S>()
+
+fun test(a: Base<B, D>) = a is <!CANNOT_CHECK_FOR_ERASED!>Derived<A><!>

compiler/testData/diagnostics/tests/cast/IsErasedNonGeneric.kt

@@ -0,0 +1,3 @@
+trait A
+trait B
+fun testing(a: A) = a as B

compiler/testData/diagnostics/tests/cast/IsErasedNullableTasT.kt

@@ -0,0 +1 @@
+fun <T: Any> testing(a: T?) = a is T

compiler/testData/diagnostics/tests/cast/IsErasedTasT.kt

@@ -0,0 +1 @@
+fun <T> testing(a: T) = a is T

compiler/testData/diagnostics/tests/cast/IsErasedToErrorType.kt

@@ -0,0 +1 @@
+fun testing(a: Any) = a is <!UNRESOLVED_REFERENCE!>UnresolvedType<!><Int>

compiler/testData/diagnostics/tests/cast/IsRecursionSustainable.kt

@@ -0,0 +1,6 @@
+open class RecA<T>: <!CYCLIC_INHERITANCE_HIERARCHY!>RecB<T><!>()
+open class RecB<T>: <!CYCLIC_INHERITANCE_HIERARCHY!>RecA<T><!>()
+open class SelfR<T>: <!CYCLIC_INHERITANCE_HIERARCHY!>SelfR<T><!>()
+
+fun test(f: SelfR<String>) = f is <!CANNOT_CHECK_FOR_ERASED!>RecA<String><!>
+fun test(f: RecB<String>) = f is RecA<String>

compiler/testData/diagnostics/tests/generics/RawTypeInIsExpression.kt

@@ -6,7 +6,7 @@ public fun foo(a: Any) {
     a is Map<out Any?, Any?>
     a is Map<*, *>
     a is Map<<!SYNTAX!><!>>
-    a is <!CANNOT_CHECK_FOR_ERASED!>List<<!WRONG_NUMBER_OF_TYPE_ARGUMENTS!>Map<!>><!>
+    a is List<<!WRONG_NUMBER_OF_TYPE_ARGUMENTS!>Map<!>>
     a is <!NO_TYPE_ARGUMENTS_ON_RHS_OF_IS_EXPRESSION!>List<!>
     a is Int
 

compiler/testData/diagnostics/tests/generics/RawTypeInIsPattern.kt

@@ -5,7 +5,7 @@ public fun foo(a: Any, <!UNUSED_PARAMETER!>b<!>: <!WRONG_NUMBER_OF_TYPE_ARGUMENT
         is Map<out Any?, Any?> -> {}
         is Map<*, *> -> {}
         is Map<<!SYNTAX!><!>> -> {}
-        is <!CANNOT_CHECK_FOR_ERASED!>List<<!WRONG_NUMBER_OF_TYPE_ARGUMENTS!>Map<!>><!> -> {}
+        is List<<!WRONG_NUMBER_OF_TYPE_ARGUMENTS!>Map<!>> -> {}
         is <!NO_TYPE_ARGUMENTS_ON_RHS_OF_IS_EXPRESSION!>List<!> -> {}
         is Int -> {}
         else -> {}

compiler/tests/org/jetbrains/jet/checkers/JetDiagnosticsTestGenerated.java

@@ -980,6 +980,56 @@ public class JetDiagnosticsTestGenerated extends AbstractDiagnosticsTestWithEage
                 doTest("compiler/testData/diagnostics/tests/cast/AsErasedWarning.kt");
             }
             
+            @TestMetadata("DowncastMap.kt")
+            public void testDowncastMap() throws Exception {
+                doTest("compiler/testData/diagnostics/tests/cast/DowncastMap.kt");
+            }
+            
+            @TestMetadata("IsArray.kt")
+            public void testIsArray() throws Exception {
+                doTest("compiler/testData/diagnostics/tests/cast/IsArray.kt");
+            }
+            
+            @TestMetadata("IsErasedAllowForDerivedWithOneSubstitutedAndOneSameGeneric.kt")
+            public void testIsErasedAllowForDerivedWithOneSubstitutedAndOneSameGeneric() throws Exception {
+                doTest("compiler/testData/diagnostics/tests/cast/IsErasedAllowForDerivedWithOneSubstitutedAndOneSameGeneric.kt");
+            }
+            
+            @TestMetadata("IsErasedAllowForExactSupertypeCheck.kt")
+            public void testIsErasedAllowForExactSupertypeCheck() throws Exception {
+                doTest("compiler/testData/diagnostics/tests/cast/IsErasedAllowForExactSupertypeCheck.kt");
+            }
+            
+            @TestMetadata("IsErasedAllowForOverridenVarianceWithProjection.kt")
+            public void testIsErasedAllowForOverridenVarianceWithProjection() throws Exception {
+                doTest("compiler/testData/diagnostics/tests/cast/IsErasedAllowForOverridenVarianceWithProjection.kt");
+            }
+            
+            @TestMetadata("IsErasedAllowForSupertypeCheckWithContrvariance.kt")
+            public void testIsErasedAllowForSupertypeCheckWithContrvariance() throws Exception {
+                doTest("compiler/testData/diagnostics/tests/cast/IsErasedAllowForSupertypeCheckWithContrvariance.kt");
+            }
+            
+            @TestMetadata("IsErasedAllowForSupertypeCheckWithCovariance.kt")
+            public void testIsErasedAllowForSupertypeCheckWithCovariance() throws Exception {
+                doTest("compiler/testData/diagnostics/tests/cast/IsErasedAllowForSupertypeCheckWithCovariance.kt");
+            }
+            
+            @TestMetadata("IsErasedAllowForTypeWithIrrelevantMixin.kt")
+            public void testIsErasedAllowForTypeWithIrrelevantMixin() throws Exception {
+                doTest("compiler/testData/diagnostics/tests/cast/IsErasedAllowForTypeWithIrrelevantMixin.kt");
+            }
+            
+            @TestMetadata("IsErasedAllowForTypeWithTwoSameTypeSubstitutions.kt")
+            public void testIsErasedAllowForTypeWithTwoSameTypeSubstitutions() throws Exception {
+                doTest("compiler/testData/diagnostics/tests/cast/IsErasedAllowForTypeWithTwoSameTypeSubstitutions.kt");
+            }
+            
+            @TestMetadata("IsErasedAllowForTypeWithoutTypeArguments.kt")
+            public void testIsErasedAllowForTypeWithoutTypeArguments() throws Exception {
+                doTest("compiler/testData/diagnostics/tests/cast/IsErasedAllowForTypeWithoutTypeArguments.kt");
+            }
+            
             @TestMetadata("IsErasedAllowFromOut.kt")
             public void testIsErasedAllowFromOut() throws Exception {
                 doTest("compiler/testData/diagnostics/tests/cast/IsErasedAllowFromOut.kt");
@@ -1015,6 +1065,16 @@ public class JetDiagnosticsTestGenerated extends AbstractDiagnosticsTestWithEage
                 doTest("compiler/testData/diagnostics/tests/cast/IsErasedDisallowDifferentArgInvariantPosition.kt");
             }
             
+            @TestMetadata("IsErasedDisallowForOverridenVariance.kt")
+            public void testIsErasedDisallowForOverridenVariance() throws Exception {
+                doTest("compiler/testData/diagnostics/tests/cast/IsErasedDisallowForOverridenVariance.kt");
+            }
+            
+            @TestMetadata("IsErasedDisallowForTypeWithConstraints.kt")
+            public void testIsErasedDisallowForTypeWithConstraints() throws Exception {
+                doTest("compiler/testData/diagnostics/tests/cast/IsErasedDisallowForTypeWithConstraints.kt");
+            }
+            
             @TestMetadata("IsErasedDisallowFromAny.kt")
             public void testIsErasedDisallowFromAny() throws Exception {
                 doTest("compiler/testData/diagnostics/tests/cast/IsErasedDisallowFromAny.kt");
@@ -1035,11 +1095,46 @@ public class JetDiagnosticsTestGenerated extends AbstractDiagnosticsTestWithEage
                 doTest("compiler/testData/diagnostics/tests/cast/IsErasedDisallowFromOutAtClass.kt");
             }
             
+            @TestMetadata("IsErasedDissallowForSubtypeMappedToTwoParamsWithFirstInvalid.kt")
+            public void testIsErasedDissallowForSubtypeMappedToTwoParamsWithFirstInvalid() throws Exception {
+                doTest("compiler/testData/diagnostics/tests/cast/IsErasedDissallowForSubtypeMappedToTwoParamsWithFirstInvalid.kt");
+            }
+            
+            @TestMetadata("IsErasedDissallowForSubtypeMappedToTwoParamsWithSecondInvalid.kt")
+            public void testIsErasedDissallowForSubtypeMappedToTwoParamsWithSecondInvalid() throws Exception {
+                doTest("compiler/testData/diagnostics/tests/cast/IsErasedDissallowForSubtypeMappedToTwoParamsWithSecondInvalid.kt");
+            }
+            
+            @TestMetadata("IsErasedNonGeneric.kt")
+            public void testIsErasedNonGeneric() throws Exception {
+                doTest("compiler/testData/diagnostics/tests/cast/IsErasedNonGeneric.kt");
+            }
+            
+            @TestMetadata("IsErasedNullableTasT.kt")
+            public void testIsErasedNullableTasT() throws Exception {
+                doTest("compiler/testData/diagnostics/tests/cast/IsErasedNullableTasT.kt");
+            }
+            
             @TestMetadata("IsErasedStar.kt")
             public void testIsErasedStar() throws Exception {
                 doTest("compiler/testData/diagnostics/tests/cast/IsErasedStar.kt");
             }
             
+            @TestMetadata("IsErasedTasT.kt")
+            public void testIsErasedTasT() throws Exception {
+                doTest("compiler/testData/diagnostics/tests/cast/IsErasedTasT.kt");
+            }
+            
+            @TestMetadata("IsErasedToErrorType.kt")
+            public void testIsErasedToErrorType() throws Exception {
+                doTest("compiler/testData/diagnostics/tests/cast/IsErasedToErrorType.kt");
+            }
+            
+            @TestMetadata("IsRecursionSustainable.kt")
+            public void testIsRecursionSustainable() throws Exception {
+                doTest("compiler/testData/diagnostics/tests/cast/IsRecursionSustainable.kt");
+            }
+            
             @TestMetadata("IsReified.kt")
             public void testIsReified() throws Exception {
                 doTest("compiler/testData/diagnostics/tests/cast/IsReified.kt");