Merge pull request #22197 from Microsoft/fixConditionalTypes

Conditional type fixes

src/compiler/checker.ts

@@ -318,7 +318,6 @@ namespace ts {
         const intersectionTypes = createMap<IntersectionType>();
         const literalTypes = createMap<LiteralType>();
         const indexedAccessTypes = createMap<IndexedAccessType>();
-        const conditionalTypes = createMap<ConditionalType>();
         const evolvingArrayTypes: EvolvingArrayType[] = [];
         const undefinedProperties = createMap<Symbol>() as UnderscoreEscapedMap<Symbol>;
 
@@ -600,6 +599,7 @@ namespace ts {
             ObjectType = 1 << 9,
             EmptyObject = 1 << 10,
             Union = 1 << 11,
+            Wildcard = 1 << 12,
         }
 
         const enum MembersOrExportsResolutionKind {
@@ -2975,8 +2975,8 @@ namespace ts {
                 if (type.flags & TypeFlags.Conditional) {
                     const checkTypeNode = typeToTypeNodeHelper((<ConditionalType>type).checkType, context);
                     const extendsTypeNode = typeToTypeNodeHelper((<ConditionalType>type).extendsType, context);
-                    const trueTypeNode = typeToTypeNodeHelper((<ConditionalType>type).trueType, context);
-                    const falseTypeNode = typeToTypeNodeHelper((<ConditionalType>type).falseType, context);
+                    const trueTypeNode = typeToTypeNodeHelper(getTrueTypeFromConditionalType(<ConditionalType>type), context);
+                    const falseTypeNode = typeToTypeNodeHelper(getFalseTypeFromConditionalType(<ConditionalType>type), context);
                     return createConditionalTypeNode(checkTypeNode, extendsTypeNode, trueTypeNode, falseTypeNode);
                 }
                 if (type.flags & TypeFlags.Substitution) {
@@ -5899,8 +5899,7 @@ namespace ts {
                 // Create a mapper from T to the current iteration type constituent. Then, if the
                 // mapped type is itself an instantiated type, combine the iteration mapper with the
                 // instantiation mapper.
-                const iterationMapper = createTypeMapper([typeParameter], [t]);
-                const templateMapper = type.mapper ? combineTypeMappers(type.mapper, iterationMapper) : iterationMapper;
+                const templateMapper = combineTypeMappers(type.mapper, createTypeMapper([typeParameter], [t]));
                 const propType = instantiateType(templateType, templateMapper);
                 // If the current iteration type constituent is a string literal type, create a property.
                 // Otherwise, for type string create a string index signature.
@@ -6122,22 +6121,20 @@ namespace ts {
         }
 
         function getDefaultConstraintOfConditionalType(type: ConditionalType) {
-            return getUnionType([type.trueType, type.falseType]);
+            return getUnionType([getTrueTypeFromConditionalType(type), getFalseTypeFromConditionalType(type)]);
         }
 
-        function getConstraintOfDistributiveConditionalType(type: ConditionalType) {
+        function getConstraintOfDistributiveConditionalType(type: ConditionalType): Type {
             // Check if we have a conditional type of the form 'T extends U ? X : Y', where T is a constrained
             // type parameter. If so, create an instantiation of the conditional type where T is replaced
             // with its constraint. We do this because if the constraint is a union type it will be distributed
             // over the conditional type and possibly reduced. For example, 'T extends undefined ? never : T'
             // removes 'undefined' from T.
-            if (isDistributiveConditionalType(type)) {
+            if (type.root.isDistributive) {
                 const constraint = getConstraintOfType(type.checkType);
                 if (constraint) {
-                    const target = type.target || type;
-                    const mapper = createTypeMapper([<TypeParameter>target.checkType], [constraint]);
-                    const combinedMapper = type.mapper ? combineTypeMappers(mapper, type.mapper) : mapper;
-                    return instantiateType(target, combinedMapper);
+                    const mapper = createTypeMapper([<TypeParameter>type.root.checkType], [constraint]);
+                    return getConditionalTypeInstantiation(type, combineTypeMappers(mapper, type.mapper));
                 }
             }
             return undefined;
@@ -6236,7 +6233,8 @@ namespace ts {
                     return baseIndexedAccess && baseIndexedAccess !== unknownType ? getBaseConstraint(baseIndexedAccess) : undefined;
                 }
                 if (t.flags & TypeFlags.Conditional) {
-                    return getBaseConstraint(getConstraintOfConditionalType(<ConditionalType>t));
+                    const constraint = getConstraintOfConditionalType(<ConditionalType>t);
+                    return constraint && getBaseConstraint(constraint);
                 }
                 if (t.flags & TypeFlags.Substitution) {
                     return getBaseConstraint((<SubstitutionType>t).substitute);
@@ -7639,6 +7637,7 @@ namespace ts {
             }
             else if (flags & TypeFlags.Any) {
                 includes |= TypeIncludes.Any;
+                if (type === wildcardType) includes |= TypeIncludes.Wildcard;
             }
             else if (!strictNullChecks && flags & TypeFlags.Nullable) {
                 if (flags & TypeFlags.Undefined) includes |= TypeIncludes.Undefined;
@@ -7758,7 +7757,7 @@ namespace ts {
             const typeSet: Type[] = [];
             const includes = addTypesToUnion(typeSet, 0, types);
             if (includes & TypeIncludes.Any) {
-                return anyType;
+                return includes & TypeIncludes.Wildcard ? wildcardType : anyType;
             }
             switch (unionReduction) {
                 case UnionReduction.Literal:
@@ -8140,7 +8139,7 @@ namespace ts {
 
         function substituteIndexedMappedType(objectType: MappedType, type: IndexedAccessType) {
             const mapper = createTypeMapper([getTypeParameterFromMappedType(objectType)], [type.indexType]);
-            const templateMapper = objectType.mapper ? combineTypeMappers(objectType.mapper, mapper) : mapper;
+            const templateMapper = combineTypeMappers(objectType.mapper, mapper);
             return instantiateType(getTemplateTypeFromMappedType(objectType), templateMapper);
         }
 
@@ -8207,76 +8206,59 @@ namespace ts {
             return type.flags & TypeFlags.Substitution ? (<SubstitutionType>type).typeParameter : type;
         }
 
-        function createConditionalType(checkType: Type, extendsType: Type, trueType: Type, falseType: Type, inferTypeParameters: TypeParameter[], target: ConditionalType, mapper: TypeMapper, aliasSymbol: Symbol, aliasTypeArguments: Type[]) {
-            const type = <ConditionalType>createType(TypeFlags.Conditional);
-            type.checkType = checkType;
-            type.extendsType = extendsType;
-            type.trueType = trueType;
-            type.falseType = falseType;
-            type.inferTypeParameters = inferTypeParameters;
-            type.target = target;
-            type.mapper = mapper;
-            type.aliasSymbol = aliasSymbol;
-            type.aliasTypeArguments = aliasTypeArguments;
-            return type;
-        }
-
-        function getConditionalType(checkType: Type, baseExtendsType: Type, baseTrueType: Type, baseFalseType: Type, inferTypeParameters: TypeParameter[], target: ConditionalType, mapper: TypeMapper, aliasSymbol?: Symbol, baseAliasTypeArguments?: Type[]): Type {
-            // Instantiate extends type without instantiating any 'infer T' type parameters
-            const extendsType = instantiateType(baseExtendsType, mapper);
+        function getConditionalType(root: ConditionalRoot, mapper: TypeMapper): Type {
+            const checkType = instantiateType(root.checkType, mapper);
+            const extendsType = instantiateType(root.extendsType, mapper);
             // Return falseType for a definitely false extends check. We check an instantations of the two
             // types with type parameters mapped to the wildcard type, the most permissive instantiations
             // possible (the wildcard type is assignable to and from all types). If those are not related,
             // then no instatiations will be and we can just return the false branch type.
             if (!typeMaybeAssignableTo(getWildcardInstantiation(checkType), getWildcardInstantiation(extendsType))) {
-                return instantiateType(baseFalseType, mapper);
+                return instantiateType(root.falseType, mapper);
             }
             // The check could be true for some instantiation
             let combinedMapper: TypeMapper;
-            if (inferTypeParameters) {
-                const inferences = map(inferTypeParameters, createInferenceInfo);
+            if (root.inferTypeParameters) {
+                const inferences = map(root.inferTypeParameters, createInferenceInfo);
                 // We don't want inferences from constraints as they may cause us to eagerly resolve the
                 // conditional type instead of deferring resolution. Also, we always want strict function
                 // types rules (i.e. proper contravariance) for inferences.
                 inferTypes(inferences, checkType, extendsType, InferencePriority.NoConstraints | InferencePriority.AlwaysStrict);
-                // We infer 'never' when there are no candidates for a type parameter
-                const inferredTypes = map(inferences, inference => getTypeFromInference(inference) || neverType);
-                const inferenceMapper = createTypeMapper(inferTypeParameters, inferredTypes);
-                combinedMapper = mapper ? combineTypeMappers(mapper, inferenceMapper) : inferenceMapper;
+                // We infer {} when there are no candidates for a type parameter
+                const inferredTypes = map(inferences, inference => getTypeFromInference(inference) || emptyObjectType);
+                combinedMapper = combineTypeMappers(mapper, createTypeMapper(root.inferTypeParameters, inferredTypes));
             }
-            // Return union of trueType and falseType for any and never since they match anything
-            if (checkType.flags & TypeFlags.Any || (checkType.flags & TypeFlags.Never && !(extendsType.flags & TypeFlags.Never))) {
-                return getUnionType([instantiateType(baseTrueType, combinedMapper || mapper), instantiateType(baseFalseType, mapper)]);
+            // Return union of trueType and falseType for 'any' since it matches anything
+            if (checkType.flags & TypeFlags.Any) {
+                return getUnionType([instantiateType(root.trueType, combinedMapper || mapper), instantiateType(root.falseType, mapper)]);
             }
             // Instantiate the extends type including inferences for 'infer T' type parameters
-            const inferredExtendsType = combinedMapper ? instantiateType(baseExtendsType, combinedMapper) : extendsType;
+            const inferredExtendsType = combinedMapper ? instantiateType(root.extendsType, combinedMapper) : extendsType;
             // Return trueType for a definitely true extends check. The definitely assignable relation excludes
             // type variable constraints from consideration. Without the definitely assignable relation, the type
             //   type Foo<T extends { x: any }> = T extends { x: string } ? string : number
             // would immediately resolve to 'string' instead of being deferred.
             if (checkTypeRelatedTo(checkType, inferredExtendsType, definitelyAssignableRelation, /*errorNode*/ undefined)) {
-                return instantiateType(baseTrueType, combinedMapper || mapper);
+                return instantiateType(root.trueType, combinedMapper || mapper);
             }
             // Return a deferred type for a check that is neither definitely true nor definitely false
             const erasedCheckType = getActualTypeParameter(checkType);
-            const trueType = instantiateType(baseTrueType, mapper);
-            const falseType = instantiateType(baseFalseType, mapper);
-            // We compute the cache key from the ids of the four constituent types, plus an indicator of whether the
-            // type is distributive (i.e. whether the original declaration has a type parameter as the check type).
-            const isDistributive = (target ? target.checkType : erasedCheckType).flags & TypeFlags.TypeParameter ? 1 : 0;
-            const id = erasedCheckType.id + "," + extendsType.id + "," + trueType.id + "," + falseType.id + "," + isDistributive;
-            const cached = conditionalTypes.get(id);
-            if (cached) {
-                return cached;
-            }
-            const result = createConditionalType(erasedCheckType, extendsType, trueType, falseType,
-                inferTypeParameters, target, mapper, aliasSymbol, instantiateTypes(baseAliasTypeArguments, mapper));
-            conditionalTypes.set(id, result);
+            const result = <ConditionalType>createType(TypeFlags.Conditional);
+            result.root = root;
+            result.checkType = erasedCheckType;
+            result.extendsType = extendsType;
+            result.mapper = mapper;
+            result.aliasSymbol = root.aliasSymbol;
+            result.aliasTypeArguments = instantiateTypes(root.aliasTypeArguments, mapper);
             return result;
         }
 
-        function isDistributiveConditionalType(type: ConditionalType) {
-            return !!((type.target || type).checkType.flags & TypeFlags.TypeParameter);
+        function getTrueTypeFromConditionalType(type: ConditionalType) {
+            return type.resolvedTrueType || (type.resolvedTrueType = instantiateType(type.root.trueType, type.mapper));
+        }
+
+        function getFalseTypeFromConditionalType(type: ConditionalType) {
+            return type.resolvedFalseType || (type.resolvedFalseType = instantiateType(type.root.falseType, type.mapper));
         }
 
         function getInferTypeParameters(node: ConditionalTypeNode): TypeParameter[] {
@@ -8294,11 +8276,28 @@ namespace ts {
         function getTypeFromConditionalTypeNode(node: ConditionalTypeNode): Type {
             const links = getNodeLinks(node);
             if (!links.resolvedType) {
-                links.resolvedType = getConditionalType(
-                    getTypeFromTypeNode(node.checkType), getTypeFromTypeNode(node.extendsType),
-                    getTypeFromTypeNode(node.trueType), getTypeFromTypeNode(node.falseType),
-                    getInferTypeParameters(node), /*target*/ undefined, /*mapper*/ undefined,
-                    getAliasSymbolForTypeNode(node), getAliasTypeArgumentsForTypeNode(node));
+                const checkType = getTypeFromTypeNode(node.checkType);
+                const aliasTypeArguments = getAliasTypeArgumentsForTypeNode(node);
+                const allOuterTypeParameters = getOuterTypeParameters(node, /*includeThisTypes*/ true);
+                const outerTypeParameters = aliasTypeArguments ? allOuterTypeParameters : filter(allOuterTypeParameters, tp => isTypeParameterPossiblyReferenced(tp, node));
+                const root: ConditionalRoot = {
+                    node,
+                    checkType,
+                    extendsType: getTypeFromTypeNode(node.extendsType),
+                    trueType: getTypeFromTypeNode(node.trueType),
+                    falseType: getTypeFromTypeNode(node.falseType),
+                    isDistributive: !!(checkType.flags & TypeFlags.TypeParameter),
+                    inferTypeParameters: getInferTypeParameters(node),
+                    outerTypeParameters,
+                    instantiations: undefined,
+                    aliasSymbol: getAliasSymbolForTypeNode(node),
+                    aliasTypeArguments
+                };
+                links.resolvedType = getConditionalType(root, /*mapper*/ undefined);
+                if (outerTypeParameters) {
+                    root.instantiations = createMap<Type>();
+                    root.instantiations.set(getTypeListId(outerTypeParameters), links.resolvedType);
+                }
             }
             return links.resolvedType;
         }
@@ -8689,6 +8688,8 @@ namespace ts {
         }
 
         function combineTypeMappers(mapper1: TypeMapper, mapper2: TypeMapper): TypeMapper {
+            if (!mapper1) return mapper2;
+            if (!mapper2) return mapper1;
             return t => instantiateType(mapper1(t), mapper2);
         }
 
@@ -8886,24 +8887,36 @@ namespace ts {
         }
 
         function getConditionalTypeInstantiation(type: ConditionalType, mapper: TypeMapper): Type {
-            const target = type.target || type;
-            const combinedMapper = type.mapper ? combineTypeMappers(type.mapper, mapper) : mapper;
+            const root = type.root;
+            if (root.outerTypeParameters) {
+                // We are instantiating a conditional type that has one or more type parameters in scope. Apply the
+                // mapper to the type parameters to produce the effective list of type arguments, and compute the
+                // instantiation cache key from the type IDs of the type arguments.
+                const typeArguments = map(root.outerTypeParameters, mapper);
+                const id = getTypeListId(typeArguments);
+                let result = root.instantiations.get(id);
+                if (!result) {
+                    const newMapper = createTypeMapper(root.outerTypeParameters, typeArguments);
+                    result = instantiateConditionalType(root, newMapper);
+                    root.instantiations.set(id, result);
+                }
+                return result;
+            }
+            return type;
+        }
+
+        function instantiateConditionalType(root: ConditionalRoot, mapper: TypeMapper): Type {
             // Check if we have a conditional type where the check type is a naked type parameter. If so,
             // the conditional type is distributive over union types and when T is instantiated to a union
             // type A | B, we produce (A extends U ? X : Y) | (B extends U ? X : Y).
-            if (isDistributiveConditionalType(target)) {
-                const checkType = <TypeParameter>target.checkType;
-                const instantiatedType = combinedMapper(checkType);
-                if (checkType !== instantiatedType && instantiatedType.flags & TypeFlags.Union) {
-                    return mapType(instantiatedType, t => instantiateConditionalType(target, createReplacementMapper(checkType, t, combinedMapper)));
+            if (root.isDistributive) {
+                const checkType = <TypeParameter>root.checkType;
+                const instantiatedType = mapper(checkType);
+                if (checkType !== instantiatedType && instantiatedType.flags & (TypeFlags.Union | TypeFlags.Never)) {
+                    return mapType(instantiatedType, t => getConditionalType(root, createReplacementMapper(checkType, t, mapper)));
                 }
             }
-            return instantiateConditionalType(target, combinedMapper);
-        }
-
-        function instantiateConditionalType(type: ConditionalType, mapper: TypeMapper): Type {
-            return getConditionalType(instantiateType(type.checkType, mapper), type.extendsType, type.trueType, type.falseType,
-                type.inferTypeParameters, type, mapper, type.aliasSymbol, type.aliasTypeArguments);
+            return getConditionalType(root, mapper);
         }
 
         function instantiateType(type: Type, mapper: TypeMapper): Type {
@@ -8945,7 +8958,7 @@ namespace ts {
                     return getIndexedAccessType(instantiateType((<IndexedAccessType>type).objectType, mapper), instantiateType((<IndexedAccessType>type).indexType, mapper));
                 }
                 if (type.flags & TypeFlags.Conditional) {
-                    return getConditionalTypeInstantiation(<ConditionalType>type, mapper);
+                    return getConditionalTypeInstantiation(<ConditionalType>type, combineTypeMappers((<ConditionalType>type).mapper, mapper));
                 }
                 if (type.flags & TypeFlags.Substitution) {
                     return mapper((<SubstitutionType>type).typeParameter);
@@ -9691,11 +9704,11 @@ namespace ts {
                     }
                 }
                 if (flags & TypeFlags.Conditional) {
-                    if (result = isRelatedTo((<ConditionalType>source).checkType, (<ConditionalType>target).checkType, /*reportErrors*/ false)) {
-                        if (result &= isRelatedTo((<ConditionalType>source).extendsType, (<ConditionalType>target).extendsType, /*reportErrors*/ false)) {
-                            if (result &= isRelatedTo((<ConditionalType>source).trueType, (<ConditionalType>target).trueType, /*reportErrors*/ false)) {
-                                if (result &= isRelatedTo((<ConditionalType>source).falseType, (<ConditionalType>target).falseType, /*reportErrors*/ false)) {
-                                    if (isDistributiveConditionalType(<ConditionalType>source) === isDistributiveConditionalType(<ConditionalType>target)) {
+                    if ((<ConditionalType>source).root.isDistributive === (<ConditionalType>target).root.isDistributive) {
+                        if (result = isRelatedTo((<ConditionalType>source).checkType, (<ConditionalType>target).checkType, /*reportErrors*/ false)) {
+                            if (result &= isRelatedTo((<ConditionalType>source).extendsType, (<ConditionalType>target).extendsType, /*reportErrors*/ false)) {
+                                if (result &= isRelatedTo(getTrueTypeFromConditionalType(<ConditionalType>source), getTrueTypeFromConditionalType(<ConditionalType>target), /*reportErrors*/ false)) {
+                                    if (result &= isRelatedTo(getFalseTypeFromConditionalType(<ConditionalType>source), getFalseTypeFromConditionalType(<ConditionalType>target), /*reportErrors*/ false)) {
                                         return result;
                                     }
                                 }
@@ -10085,20 +10098,11 @@ namespace ts {
                     }
                 }
                 else if (source.flags & TypeFlags.Conditional) {
-                    if (relation !== definitelyAssignableRelation) {
-                        const constraint = getConstraintOfDistributiveConditionalType(<ConditionalType>source);
-                        if (constraint) {
-                            if (result = isRelatedTo(constraint, target, reportErrors)) {
-                                errorInfo = saveErrorInfo;
-                                return result;
-                            }
-                        }
-                    }
                     if (target.flags & TypeFlags.Conditional) {
                         if (isTypeIdenticalTo((<ConditionalType>source).checkType, (<ConditionalType>target).checkType) &&
                             isTypeIdenticalTo((<ConditionalType>source).extendsType, (<ConditionalType>target).extendsType)) {
-                            if (result = isRelatedTo((<ConditionalType>source).trueType, (<ConditionalType>target).trueType, reportErrors)) {
-                                result &= isRelatedTo((<ConditionalType>source).falseType, (<ConditionalType>target).falseType, reportErrors);
+                            if (result = isRelatedTo(getTrueTypeFromConditionalType(<ConditionalType>source), getTrueTypeFromConditionalType(<ConditionalType>target), reportErrors)) {
+                                result &= isRelatedTo(getFalseTypeFromConditionalType(<ConditionalType>source), getFalseTypeFromConditionalType(<ConditionalType>target), reportErrors);
                             }
                             if (result) {
                                 errorInfo = saveErrorInfo;
@@ -10106,9 +10110,21 @@ namespace ts {
                             }
                         }
                     }
-                    else if (result = isRelatedTo(getDefaultConstraintOfConditionalType(<ConditionalType>source), target, reportErrors)) {
-                        errorInfo = saveErrorInfo;
-                        return result;
+                    else if (relation !== definitelyAssignableRelation) {
+                        const distributiveConstraint = getConstraintOfDistributiveConditionalType(<ConditionalType>source);
+                        if (distributiveConstraint) {
+                            if (result = isRelatedTo(distributiveConstraint, target, reportErrors)) {
+                                errorInfo = saveErrorInfo;
+                                return result;
+                            }
+                        }
+                        const defaultConstraint = getDefaultConstraintOfConditionalType(<ConditionalType>source);
+                        if (defaultConstraint) {
+                            if (result = isRelatedTo(defaultConstraint, target, reportErrors)) {
+                                errorInfo = saveErrorInfo;
+                                return result;
+                            }
+                        }
                     }
                 }
                 else {
@@ -11479,12 +11495,23 @@ namespace ts {
             let symbolStack: Symbol[];
             let visited: Map<boolean>;
             let contravariant = false;
+            let propagationType: Type;
             inferFromTypes(originalSource, originalTarget);
 
             function inferFromTypes(source: Type, target: Type) {
                 if (!couldContainTypeVariables(target)) {
                     return;
                 }
+                if (source.flags & (TypeFlags.Any | TypeFlags.Never) && source !== silentNeverType) {
+                    // We are inferring from 'any' or 'never'. We want to infer this type for every type parameter
+                    // referenced in the target type, so we record the propagation type and infer from the target
+                    // to itself. Then, as we find candidates we substitute the propagation type.
+                    const savePropagationType = propagationType;
+                    propagationType = source;
+                    inferFromTypes(target, target);
+                    propagationType = savePropagationType;
+                    return;
+                }
                 if (source.aliasSymbol && source.aliasTypeArguments && source.aliasSymbol === target.aliasSymbol) {
                     // Source and target are types originating in the same generic type alias declaration.
                     // Simply infer from source type arguments to target type arguments.
@@ -11552,11 +11579,12 @@ namespace ts {
                                 inference.priority = priority;
                             }
                             if (priority === inference.priority) {
+                                const candidate = propagationType || source;
                                 if (contravariant) {
-                                    inference.contraCandidates = append(inference.contraCandidates, source);
+                                    inference.contraCandidates = append(inference.contraCandidates, candidate);
                                 }
                                 else {
-                                    inference.candidates = append(inference.candidates, source);
+                                    inference.candidates = append(inference.candidates, candidate);
                                 }
                             }
                             if (!(priority & InferencePriority.ReturnType) && target.flags & TypeFlags.TypeParameter && !isTypeParameterAtTopLevel(originalTarget, <TypeParameter>target)) {
@@ -11599,8 +11627,8 @@ namespace ts {
                 else if (source.flags & TypeFlags.Conditional && target.flags & TypeFlags.Conditional) {
                     inferFromTypes((<ConditionalType>source).checkType, (<ConditionalType>target).checkType);
                     inferFromTypes((<ConditionalType>source).extendsType, (<ConditionalType>target).extendsType);
-                    inferFromTypes((<ConditionalType>source).trueType, (<ConditionalType>target).trueType);
-                    inferFromTypes((<ConditionalType>source).falseType, (<ConditionalType>target).falseType);
+                    inferFromTypes(getTrueTypeFromConditionalType(<ConditionalType>source), getTrueTypeFromConditionalType(<ConditionalType>target));
+                    inferFromTypes(getFalseTypeFromConditionalType(<ConditionalType>source), getFalseTypeFromConditionalType(<ConditionalType>target));
                 }
                 else if (target.flags & TypeFlags.UnionOrIntersection) {
                     const targetTypes = (<UnionOrIntersectionType>target).types;
@@ -12424,6 +12452,9 @@ namespace ts {
         // is a union type, the mapping function is applied to each constituent type and a union
         // of the resulting types is returned.
         function mapType(type: Type, mapper: (t: Type) => Type, noReductions?: boolean): Type {
+            if (type.flags & TypeFlags.Never) {
+                return type;
+            }
             if (!(type.flags & TypeFlags.Union)) {
                 return mapper(type);
             }

src/compiler/types.ts

@@ -3821,16 +3821,27 @@ namespace ts {
         type: InstantiableType | UnionOrIntersectionType;
     }
 
-    // T extends U ? X : Y (TypeFlags.Conditional)
-    export interface ConditionalType extends InstantiableType {
+    export interface ConditionalRoot {
+        node: ConditionalTypeNode;
         checkType: Type;
         extendsType: Type;
         trueType: Type;
         falseType: Type;
-        /* @internal */
+        isDistributive: boolean;
         inferTypeParameters: TypeParameter[];
-        /* @internal */
-        target?: ConditionalType;
+        outerTypeParameters?: TypeParameter[];
+        instantiations?: Map<Type>;
+        aliasSymbol: Symbol;
+        aliasTypeArguments: Type[];
+    }
+
+    // T extends U ? X : Y (TypeFlags.Conditional)
+    export interface ConditionalType extends InstantiableType {
+        root: ConditionalRoot;
+        checkType: Type;
+        extendsType: Type;
+        resolvedTrueType?: Type;
+        resolvedFalseType?: Type;
         /* @internal */
         mapper?: TypeMapper;
     }

tests/baselines/reference/api/tsserverlibrary.d.ts

@@ -2192,11 +2192,25 @@ declare namespace ts {
     interface IndexType extends InstantiableType {
         type: InstantiableType | UnionOrIntersectionType;
     }
-    interface ConditionalType extends InstantiableType {
+    interface ConditionalRoot {
+        node: ConditionalTypeNode;
         checkType: Type;
         extendsType: Type;
         trueType: Type;
         falseType: Type;
+        isDistributive: boolean;
+        inferTypeParameters: TypeParameter[];
+        outerTypeParameters?: TypeParameter[];
+        instantiations?: Map<Type>;
+        aliasSymbol: Symbol;
+        aliasTypeArguments: Type[];
+    }
+    interface ConditionalType extends InstantiableType {
+        root: ConditionalRoot;
+        checkType: Type;
+        extendsType: Type;
+        resolvedTrueType?: Type;
+        resolvedFalseType?: Type;
     }
     interface SubstitutionType extends InstantiableType {
         typeParameter: TypeParameter;

tests/baselines/reference/api/typescript.d.ts

@@ -2192,11 +2192,25 @@ declare namespace ts {
     interface IndexType extends InstantiableType {
         type: InstantiableType | UnionOrIntersectionType;
     }
-    interface ConditionalType extends InstantiableType {
+    interface ConditionalRoot {
+        node: ConditionalTypeNode;
         checkType: Type;
         extendsType: Type;
         trueType: Type;
         falseType: Type;
+        isDistributive: boolean;
+        inferTypeParameters: TypeParameter[];
+        outerTypeParameters?: TypeParameter[];
+        instantiations?: Map<Type>;
+        aliasSymbol: Symbol;
+        aliasTypeArguments: Type[];
+    }
+    interface ConditionalType extends InstantiableType {
+        root: ConditionalRoot;
+        checkType: Type;
+        extendsType: Type;
+        resolvedTrueType?: Type;
+        resolvedFalseType?: Type;
     }
     interface SubstitutionType extends InstantiableType {
         typeParameter: TypeParameter;

tests/baselines/reference/conditionalTypes1.errors.txt

@@ -157,7 +157,7 @@ tests/cases/conformance/types/conditional/conditionalTypes1.ts(275,43): error TS
     
     type T20 = TypeName<string | (() => void)>;  // "string" | "function"
     type T21 = TypeName<any>;  // "string" | "number" | "boolean" | "undefined" | "function" | "object"
-    type T22 = TypeName<never>;  // "string" | "number" | "boolean" | "undefined" | "function" | "object"
+    type T22 = TypeName<never>;  // never
     type T23 = TypeName<{}>;  // "object"
     
     type KnockoutObservable<T> = { object: T };
@@ -329,7 +329,7 @@ tests/cases/conformance/types/conditional/conditionalTypes1.ts(275,43): error TS
     type Q1 = IsString<number>;  // false
     type Q2 = IsString<"abc">;  // true
     type Q3 = IsString<any>;  // boolean
-    type Q4 = IsString<never>;  // boolean
+    type Q4 = IsString<never>;  // never
     
     type N1 = Not<false>;  // true
     type N2 = Not<true>;  // false
@@ -357,9 +357,9 @@ tests/cases/conformance/types/conditional/conditionalTypes1.ts(275,43): error TS
     
     type T40 = never extends never ? true : false;  // true
     type T41 = number extends never ? true : false;  // false
-    type T42 = never extends number ? true : false;  // boolean
+    type T42 = never extends number ? true : false;  // true
     
-    type IsNever<T> = T extends never ? true : false;
+    type IsNever<T> = [T] extends [never] ? true : false;
     
     type T50 = IsNever<never>;  // true
     type T51 = IsNever<number>;  // false

tests/baselines/reference/conditionalTypes1.js

@@ -64,7 +64,7 @@ type TypeName<T> =
 
 type T20 = TypeName<string | (() => void)>;  // "string" | "function"
 type T21 = TypeName<any>;  // "string" | "number" | "boolean" | "undefined" | "function" | "object"
-type T22 = TypeName<never>;  // "string" | "number" | "boolean" | "undefined" | "function" | "object"
+type T22 = TypeName<never>;  // never
 type T23 = TypeName<{}>;  // "object"
 
 type KnockoutObservable<T> = { object: T };
@@ -172,7 +172,7 @@ type IsString<T> = Extends<T, string>;
 type Q1 = IsString<number>;  // false
 type Q2 = IsString<"abc">;  // true
 type Q3 = IsString<any>;  // boolean
-type Q4 = IsString<never>;  // boolean
+type Q4 = IsString<never>;  // never
 
 type N1 = Not<false>;  // true
 type N2 = Not<true>;  // false
@@ -200,9 +200,9 @@ type O9 = Or<boolean, boolean>;  // boolean
 
 type T40 = never extends never ? true : false;  // true
 type T41 = number extends never ? true : false;  // false
-type T42 = never extends number ? true : false;  // boolean
+type T42 = never extends number ? true : false;  // true
 
-type IsNever<T> = T extends never ? true : false;
+type IsNever<T> = [T] extends [never] ? true : false;
 
 type T50 = IsNever<never>;  // true
 type T51 = IsNever<number>;  // false
@@ -551,7 +551,7 @@ declare type O9 = Or<boolean, boolean>;
 declare type T40 = never extends never ? true : false;
 declare type T41 = number extends never ? true : false;
 declare type T42 = never extends number ? true : false;
-declare type IsNever<T> = T extends never ? true : false;
+declare type IsNever<T> = [T] extends [never] ? true : false;
 declare type T50 = IsNever<never>;
 declare type T51 = IsNever<number>;
 declare type T52 = IsNever<any>;
@@ -572,7 +572,7 @@ declare type T82 = Eq2<false, true>;
 declare type T83 = Eq2<false, false>;
 declare type Foo<T> = T extends string ? boolean : number;
 declare type Bar<T> = T extends string ? boolean : number;
-declare const convert: <U>(value: Foo<U>) => Foo<U>;
+declare const convert: <U>(value: Foo<U>) => Bar<U>;
 declare type Baz<T> = Foo<T>;
 declare const convert2: <T>(value: Foo<T>) => Foo<T>;
 declare function f31<T>(): void;

tests/baselines/reference/conditionalTypes1.symbols

@@ -243,7 +243,7 @@ type T21 = TypeName<any>;  // "string" | "number" | "boolean" | "undefined" | "f
 >T21 : Symbol(T21, Decl(conditionalTypes1.ts, 63, 43))
 >TypeName : Symbol(TypeName, Decl(conditionalTypes1.ts, 53, 43))
 
-type T22 = TypeName<never>;  // "string" | "number" | "boolean" | "undefined" | "function" | "object"
+type T22 = TypeName<never>;  // never
 >T22 : Symbol(T22, Decl(conditionalTypes1.ts, 64, 25))
 >TypeName : Symbol(TypeName, Decl(conditionalTypes1.ts, 53, 43))
 
@@ -668,7 +668,7 @@ type Q3 = IsString<any>;  // boolean
 >Q3 : Symbol(Q3, Decl(conditionalTypes1.ts, 171, 26))
 >IsString : Symbol(IsString, Decl(conditionalTypes1.ts, 166, 63))
 
-type Q4 = IsString<never>;  // boolean
+type Q4 = IsString<never>;  // never
 >Q4 : Symbol(Q4, Decl(conditionalTypes1.ts, 172, 24))
 >IsString : Symbol(IsString, Decl(conditionalTypes1.ts, 166, 63))
 
@@ -762,16 +762,16 @@ type T40 = never extends never ? true : false;  // true
 type T41 = number extends never ? true : false;  // false
 >T41 : Symbol(T41, Decl(conditionalTypes1.ts, 199, 46))
 
-type T42 = never extends number ? true : false;  // boolean
+type T42 = never extends number ? true : false;  // true
 >T42 : Symbol(T42, Decl(conditionalTypes1.ts, 200, 47))
 
-type IsNever<T> = T extends never ? true : false;
+type IsNever<T> = [T] extends [never] ? true : false;
 >IsNever : Symbol(IsNever, Decl(conditionalTypes1.ts, 201, 47))
 >T : Symbol(T, Decl(conditionalTypes1.ts, 203, 13))
 >T : Symbol(T, Decl(conditionalTypes1.ts, 203, 13))
 
 type T50 = IsNever<never>;  // true
->T50 : Symbol(T50, Decl(conditionalTypes1.ts, 203, 49))
+>T50 : Symbol(T50, Decl(conditionalTypes1.ts, 203, 53))
 >IsNever : Symbol(IsNever, Decl(conditionalTypes1.ts, 201, 47))
 
 type T51 = IsNever<number>;  // false

tests/baselines/reference/conditionalTypes1.types

@@ -254,8 +254,8 @@ type T21 = TypeName<any>;  // "string" | "number" | "boolean" | "undefined" | "f
 >T21 : "string" | "number" | "boolean" | "undefined" | "object" | "function"
 >TypeName : TypeName<T>
 
-type T22 = TypeName<never>;  // "string" | "number" | "boolean" | "undefined" | "function" | "object"
->T22 : "string" | "number" | "boolean" | "undefined" | "object" | "function"
+type T22 = TypeName<never>;  // never
+>T22 : never
 >TypeName : TypeName<T>
 
 type T23 = TypeName<{}>;  // "object"
@@ -741,8 +741,8 @@ type Q3 = IsString<any>;  // boolean
 >Q3 : boolean
 >IsString : Extends<T, string>
 
-type Q4 = IsString<never>;  // boolean
->Q4 : boolean
+type Q4 = IsString<never>;  // never
+>Q4 : never
 >IsString : Extends<T, string>
 
 type N1 = Not<false>;  // true
@@ -865,12 +865,12 @@ type T41 = number extends never ? true : false;  // false
 >true : true
 >false : false
 
-type T42 = never extends number ? true : false;  // boolean
->T42 : boolean
+type T42 = never extends number ? true : false;  // true
+>T42 : true
 >true : true
 >false : false
 
-type IsNever<T> = T extends never ? true : false;
+type IsNever<T> = [T] extends [never] ? true : false;
 >IsNever : IsNever<T>
 >T : T
 >T : T
@@ -1010,8 +1010,8 @@ type Bar<T> = T extends string ? boolean : number;
 >T : T
 
 const convert = <U>(value: Foo<U>): Bar<U> => value;
->convert : <U>(value: Foo<U>) => Foo<U>
-><U>(value: Foo<U>): Bar<U> => value : <U>(value: Foo<U>) => Foo<U>
+>convert : <U>(value: Foo<U>) => Bar<U>
+><U>(value: Foo<U>): Bar<U> => value : <U>(value: Foo<U>) => Bar<U>
 >U : U
 >value : Foo<U>
 >Foo : Foo<T>
@@ -1095,7 +1095,7 @@ function f33<T, U>() {
 >U : U
 
     type T2 = Bar<T & U>;
->T2 : Foo<T & U>
+>T2 : Bar<T & U>
 >Bar : Bar<T>
 >T : T
 >U : U
@@ -1106,7 +1106,7 @@ function f33<T, U>() {
 
     var z: T2;
 >z : Foo<T & U>
->T2 : Foo<T & U>
+>T2 : Bar<T & U>
 }
 
 // Repro from #21823
@@ -1236,7 +1236,7 @@ function f50() {
 >T : T
 
     type Omit<T extends object> = { [P in keyof T]: If<Eq<T[P], never>, never, P>; }[keyof T];
->Omit : { [P in keyof T]: (T[P] extends never ? boolean : false) extends false ? P : never; }[keyof T]
+>Omit : { [P in keyof T]: (T[P] extends never ? never : false) extends false ? P : never; }[keyof T]
 >T : T
 >P : P
 >T : T
@@ -1263,7 +1263,7 @@ function f50() {
 
     type A = Omit<{ a: void; b: never; }>;  // 'a'
 >A : "a"
->Omit : { [P in keyof T]: (T[P] extends never ? boolean : false) extends false ? P : never; }[keyof T]
+>Omit : { [P in keyof T]: (T[P] extends never ? never : false) extends false ? P : never; }[keyof T]
 >a : void
 >b : never
 

tests/baselines/reference/inferTypes1.errors.txt

@@ -50,7 +50,7 @@ tests/cases/conformance/types/conditional/inferTypes1.ts(134,40): error TS2322:
     type T13 = ReturnType<(<T extends U, U extends number[]>() => T)>;  // number[]
     type T14 = ReturnType<typeof f1>;  // { a: number, b: string }
     type T15 = ReturnType<any>;  // any
-    type T16 = ReturnType<never>;  // any
+    type T16 = ReturnType<never>;  // never
     type T17 = ReturnType<string>;  // Error
                           ~~~~~~
 !!! error TS2344: Type 'string' does not satisfy the constraint '(...args: any[]) => any'.
@@ -61,7 +61,7 @@ tests/cases/conformance/types/conditional/inferTypes1.ts(134,40): error TS2322:
     
     type U10 = InstanceType<typeof C>;  // C
     type U11 = InstanceType<any>;  // any
-    type U12 = InstanceType<never>;  // any
+    type U12 = InstanceType<never>;  // never
     type U13 = InstanceType<string>;  // Error
                             ~~~~~~
 !!! error TS2344: Type 'string' does not satisfy the constraint 'new (...args: any[]) => any'.
@@ -72,7 +72,7 @@ tests/cases/conformance/types/conditional/inferTypes1.ts(134,40): error TS2322:
     
     type ArgumentType<T extends (x: any) => any> = T extends (a: infer A) => any ? A : any;
     
-    type T20 = ArgumentType<() => void>;  // never
+    type T20 = ArgumentType<() => void>;  // {}
     type T21 = ArgumentType<(x: string) => number>;  // string
     type T22 = ArgumentType<(x?: string) => number>;  // string | undefined
     type T23 = ArgumentType<(...args: string[]) => number>;  // string
@@ -84,7 +84,7 @@ tests/cases/conformance/types/conditional/inferTypes1.ts(134,40): error TS2322:
 !!! error TS2344: Type 'Function' does not satisfy the constraint '(x: any) => any'.
 !!! error TS2344:   Type 'Function' provides no match for the signature '(x: any): any'.
     type T26 = ArgumentType<any>;  // any
-    type T27 = ArgumentType<never>;  // any
+    type T27 = ArgumentType<never>;  // never
     
     type X1<T extends { x: any, y: any }> = T extends { x: infer X, y: infer Y } ? [X, Y] : any;
     

tests/baselines/reference/inferTypes1.js

@@ -28,26 +28,26 @@ type T12 = ReturnType<(<T>() => T)>;  // {}
 type T13 = ReturnType<(<T extends U, U extends number[]>() => T)>;  // number[]
 type T14 = ReturnType<typeof f1>;  // { a: number, b: string }
 type T15 = ReturnType<any>;  // any
-type T16 = ReturnType<never>;  // any
+type T16 = ReturnType<never>;  // never
 type T17 = ReturnType<string>;  // Error
 type T18 = ReturnType<Function>;  // Error
 
 type U10 = InstanceType<typeof C>;  // C
 type U11 = InstanceType<any>;  // any
-type U12 = InstanceType<never>;  // any
+type U12 = InstanceType<never>;  // never
 type U13 = InstanceType<string>;  // Error
 type U14 = InstanceType<Function>;  // Error
 
 type ArgumentType<T extends (x: any) => any> = T extends (a: infer A) => any ? A : any;
 
-type T20 = ArgumentType<() => void>;  // never
+type T20 = ArgumentType<() => void>;  // {}
 type T21 = ArgumentType<(x: string) => number>;  // string
 type T22 = ArgumentType<(x?: string) => number>;  // string | undefined
 type T23 = ArgumentType<(...args: string[]) => number>;  // string
 type T24 = ArgumentType<(x: string, y: string) => number>;  // Error
 type T25 = ArgumentType<Function>;  // Error
 type T26 = ArgumentType<any>;  // any
-type T27 = ArgumentType<never>;  // any
+type T27 = ArgumentType<never>;  // never
 
 type X1<T extends { x: any, y: any }> = T extends { x: infer X, y: infer Y } ? [X, Y] : any;
 

tests/baselines/reference/inferTypes1.symbols

@@ -106,7 +106,7 @@ type T15 = ReturnType<any>;  // any
 >T15 : Symbol(T15, Decl(inferTypes1.ts, 27, 33))
 >ReturnType : Symbol(ReturnType, Decl(lib.d.ts, --, --))
 
-type T16 = ReturnType<never>;  // any
+type T16 = ReturnType<never>;  // never
 >T16 : Symbol(T16, Decl(inferTypes1.ts, 28, 27))
 >ReturnType : Symbol(ReturnType, Decl(lib.d.ts, --, --))
 
@@ -128,7 +128,7 @@ type U11 = InstanceType<any>;  // any
 >U11 : Symbol(U11, Decl(inferTypes1.ts, 33, 34))
 >InstanceType : Symbol(InstanceType, Decl(lib.d.ts, --, --))
 
-type U12 = InstanceType<never>;  // any
+type U12 = InstanceType<never>;  // never
 >U12 : Symbol(U12, Decl(inferTypes1.ts, 34, 29))
 >InstanceType : Symbol(InstanceType, Decl(lib.d.ts, --, --))
 
@@ -150,7 +150,7 @@ type ArgumentType<T extends (x: any) => any> = T extends (a: infer A) => any ? A
 >A : Symbol(A, Decl(inferTypes1.ts, 39, 66))
 >A : Symbol(A, Decl(inferTypes1.ts, 39, 66))
 
-type T20 = ArgumentType<() => void>;  // never
+type T20 = ArgumentType<() => void>;  // {}
 >T20 : Symbol(T20, Decl(inferTypes1.ts, 39, 87))
 >ArgumentType : Symbol(ArgumentType, Decl(inferTypes1.ts, 37, 34))
 
@@ -184,7 +184,7 @@ type T26 = ArgumentType<any>;  // any
 >T26 : Symbol(T26, Decl(inferTypes1.ts, 46, 34))
 >ArgumentType : Symbol(ArgumentType, Decl(inferTypes1.ts, 37, 34))
 
-type T27 = ArgumentType<never>;  // any
+type T27 = ArgumentType<never>;  // never
 >T27 : Symbol(T27, Decl(inferTypes1.ts, 47, 29))
 >ArgumentType : Symbol(ArgumentType, Decl(inferTypes1.ts, 37, 34))
 

tests/baselines/reference/inferTypes1.types

@@ -110,8 +110,8 @@ type T15 = ReturnType<any>;  // any
 >T15 : any
 >ReturnType : ReturnType<T>
 
-type T16 = ReturnType<never>;  // any
->T16 : any
+type T16 = ReturnType<never>;  // never
+>T16 : never
 >ReturnType : ReturnType<T>
 
 type T17 = ReturnType<string>;  // Error
@@ -132,8 +132,8 @@ type U11 = InstanceType<any>;  // any
 >U11 : any
 >InstanceType : InstanceType<T>
 
-type U12 = InstanceType<never>;  // any
->U12 : any
+type U12 = InstanceType<never>;  // never
+>U12 : never
 >InstanceType : InstanceType<T>
 
 type U13 = InstanceType<string>;  // Error
@@ -154,8 +154,8 @@ type ArgumentType<T extends (x: any) => any> = T extends (a: infer A) => any ? A
 >A : A
 >A : A
 
-type T20 = ArgumentType<() => void>;  // never
->T20 : never
+type T20 = ArgumentType<() => void>;  // {}
+>T20 : {}
 >ArgumentType : ArgumentType<T>
 
 type T21 = ArgumentType<(x: string) => number>;  // string
@@ -188,8 +188,8 @@ type T26 = ArgumentType<any>;  // any
 >T26 : any
 >ArgumentType : ArgumentType<T>
 
-type T27 = ArgumentType<never>;  // any
->T27 : any
+type T27 = ArgumentType<never>;  // never
+>T27 : never
 >ArgumentType : ArgumentType<T>
 
 type X1<T extends { x: any, y: any }> = T extends { x: infer X, y: infer Y } ? [X, Y] : any;
@@ -312,7 +312,7 @@ type T60 = infer U;  // Error
 >U : U
 
 type T61<T> = infer A extends infer B ? infer C : infer D;  // Error
->T61 : never
+>T61 : {}
 >T : T
 >A : A
 >B : B

tests/baselines/reference/mappedTypeRecursiveInference.types

@@ -108,14 +108,14 @@ let xhr: XMLHttpRequest;
 >XMLHttpRequest : XMLHttpRequest
 
 const out2 = foo(xhr);
->out2 : { onreadystatechange: {}; readonly readyState: { toString: any; toFixed: any; toExponential: any; toPrecision: any; valueOf: any; toLocaleString: any; }; readonly response: {}; readonly responseText: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; responseType: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; readonly responseURL: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; readonly responseXML: { readonly activeElement: any; alinkColor: any; readonly all: any; anchors: any; applets: any; bgColor: any; body: any; readonly characterSet: any; charset: any; readonly compatMode: any; cookie: any; readonly currentScript: any; readonly defaultView: any; designMode: any; dir: any; readonly doctype: any; documentElement: any; domain: any; embeds: any; fgColor: any; forms: any; readonly fullscreenElement: any; readonly fullscreenEnabled: any; readonly head: any; readonly hidden: any; images: any; readonly implementation: any; readonly inputEncoding: any; readonly lastModified: any; linkColor: any; links: any; readonly location: any; msCapsLockWarningOff: any; msCSSOMElementFloatMetrics: any; onabort: any; onactivate: any; onbeforeactivate: any; onbeforedeactivate: any; onblur: any; oncanplay: any; oncanplaythrough: any; onchange: any; onclick: any; oncontextmenu: any; ondblclick: any; ondeactivate: any; ondrag: any; ondragend: any; ondragenter: any; ondragleave: any; ondragover: any; ondragstart: any; ondrop: any; ondurationchange: any; onemptied: any; onended: any; onerror: any; onfocus: any; onfullscreenchange: any; onfullscreenerror: any; oninput: any; oninvalid: any; onkeydown: any; onkeypress: any; onkeyup: any; onload: any; onloadeddata: any; onloadedmetadata: any; onloadstart: any; onmousedown: any; onmousemove: any; onmouseout: any; onmouseover: any; onmouseup: any; onmousewheel: any; onmscontentzoom: any; onmsgesturechange: any; onmsgesturedoubletap: any; onmsgestureend: any; onmsgesturehold: any; onmsgesturestart: any; onmsgesturetap: any; onmsinertiastart: any; onmsmanipulationstatechanged: any; onmspointercancel: any; onmspointerdown: any; onmspointerenter: any; onmspointerleave: any; onmspointermove: any; onmspointerout: any; onmspointerover: any; onmspointerup: any; onmssitemodejumplistitemremoved: any; onmsthumbnailclick: any; onpause: any; onplay: any; onplaying: any; onpointerlockchange: any; onpointerlockerror: any; onprogress: any; onratechange: any; onreadystatechange: any; onreset: any; onscroll: any; onseeked: any; onseeking: any; onselect: any; onselectionchange: any; onselectstart: any; onstalled: any; onstop: any; onsubmit: any; onsuspend: any; ontimeupdate: any; ontouchcancel: any; ontouchend: any; ontouchmove: any; ontouchstart: any; onvolumechange: any; onwaiting: any; onwebkitfullscreenchange: any; onwebkitfullscreenerror: any; plugins: any; readonly pointerLockElement: any; readonly readyState: any; readonly referrer: any; readonly rootElement: any; scripts: any; readonly scrollingElement: any; readonly styleSheets: any; title: any; readonly URL: any; readonly URLUnencoded: any; readonly visibilityState: any; vlinkColor: any; readonly webkitCurrentFullScreenElement: any; readonly webkitFullscreenElement: any; readonly webkitFullscreenEnabled: any; readonly webkitIsFullScreen: any; readonly xmlEncoding: any;Line truncated
->foo(xhr) : { onreadystatechange: {}; readonly readyState: { toString: any; toFixed: any; toExponential: any; toPrecision: any; valueOf: any; toLocaleString: any; }; readonly response: {}; readonly responseText: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; responseType: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; readonly responseURL: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; readonly responseXML: { readonly activeElement: any; alinkColor: any; readonly all: any; anchors: any; applets: any; bgColor: any; body: any; readonly characterSet: any; charset: any; readonly compatMode: any; cookie: any; readonly currentScript: any; readonly defaultView: any; designMode: any; dir: any; readonly doctype: any; documentElement: any; domain: any; embeds: any; fgColor: any; forms: any; readonly fullscreenElement: any; readonly fullscreenEnabled: any; readonly head: any; readonly hidden: any; images: any; readonly implementation: any; readonly inputEncoding: any; readonly lastModified: any; linkColor: any; links: any; readonly location: any; msCapsLockWarningOff: any; msCSSOMElementFloatMetrics: any; onabort: any; onactivate: any; onbeforeactivate: any; onbeforedeactivate: any; onblur: any; oncanplay: any; oncanplaythrough: any; onchange: any; onclick: any; oncontextmenu: any; ondblclick: any; ondeactivate: any; ondrag: any; ondragend: any; ondragenter: any; ondragleave: any; ondragover: any; ondragstart: any; ondrop: any; ondurationchange: any; onemptied: any; onended: any; onerror: any; onfocus: any; onfullscreenchange: any; onfullscreenerror: any; oninput: any; oninvalid: any; onkeydown: any; onkeypress: any; onkeyup: any; onload: any; onloadeddata: any; onloadedmetadata: any; onloadstart: any; onmousedown: any; onmousemove: any; onmouseout: any; onmouseover: any; onmouseup: any; onmousewheel: any; onmscontentzoom: any; onmsgesturechange: any; onmsgesturedoubletap: any; onmsgestureend: any; onmsgesturehold: any; onmsgesturestart: any; onmsgesturetap: any; onmsinertiastart: any; onmsmanipulationstatechanged: any; onmspointercancel: any; onmspointerdown: any; onmspointerenter: any; onmspointerleave: any; onmspointermove: any; onmspointerout: any; onmspointerover: any; onmspointerup: any; onmssitemodejumplistitemremoved: any; onmsthumbnailclick: any; onpause: any; onplay: any; onplaying: any; onpointerlockchange: any; onpointerlockerror: any; onprogress: any; onratechange: any; onreadystatechange: any; onreset: any; onscroll: any; onseeked: any; onseeking: any; onselect: any; onselectionchange: any; onselectstart: any; onstalled: any; onstop: any; onsubmit: any; onsuspend: any; ontimeupdate: any; ontouchcancel: any; ontouchend: any; ontouchmove: any; ontouchstart: any; onvolumechange: any; onwaiting: any; onwebkitfullscreenchange: any; onwebkitfullscreenerror: any; plugins: any; readonly pointerLockElement: any; readonly readyState: any; readonly referrer: any; readonly rootElement: any; scripts: any; readonly scrollingElement: any; readonly styleSheets: any; title: any; readonly URL: any; readonly URLUnencoded: any; readonly visibilityState: any; vlinkColor: any; readonly webkitCurrentFullScreenElement: any; readonly webkitFullscreenElement: any; readonly webkitFullscreenEnabled: any; readonly webkitIsFullScreen: any; readonly xmlEncoding: Line truncated
+>out2 : { onreadystatechange: {}; readonly readyState: { toString: any; toFixed: any; toExponential: any; toPrecision: any; valueOf: any; toLocaleString: any; }; readonly response: any; readonly responseText: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; responseType: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; readonly responseURL: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; readonly responseXML: { readonly activeElement: any; alinkColor: any; readonly all: any; anchors: any; applets: any; bgColor: any; body: any; readonly characterSet: any; charset: any; readonly compatMode: any; cookie: any; readonly currentScript: any; readonly defaultView: any; designMode: any; dir: any; readonly doctype: any; documentElement: any; domain: any; embeds: any; fgColor: any; forms: any; readonly fullscreenElement: any; readonly fullscreenEnabled: any; readonly head: any; readonly hidden: any; images: any; readonly implementation: any; readonly inputEncoding: any; readonly lastModified: any; linkColor: any; links: any; readonly location: any; msCapsLockWarningOff: any; msCSSOMElementFloatMetrics: any; onabort: any; onactivate: any; onbeforeactivate: any; onbeforedeactivate: any; onblur: any; oncanplay: any; oncanplaythrough: any; onchange: any; onclick: any; oncontextmenu: any; ondblclick: any; ondeactivate: any; ondrag: any; ondragend: any; ondragenter: any; ondragleave: any; ondragover: any; ondragstart: any; ondrop: any; ondurationchange: any; onemptied: any; onended: any; onerror: any; onfocus: any; onfullscreenchange: any; onfullscreenerror: any; oninput: any; oninvalid: any; onkeydown: any; onkeypress: any; onkeyup: any; onload: any; onloadeddata: any; onloadedmetadata: any; onloadstart: any; onmousedown: any; onmousemove: any; onmouseout: any; onmouseover: any; onmouseup: any; onmousewheel: any; onmscontentzoom: any; onmsgesturechange: any; onmsgesturedoubletap: any; onmsgestureend: any; onmsgesturehold: any; onmsgesturestart: any; onmsgesturetap: any; onmsinertiastart: any; onmsmanipulationstatechanged: any; onmspointercancel: any; onmspointerdown: any; onmspointerenter: any; onmspointerleave: any; onmspointermove: any; onmspointerout: any; onmspointerover: any; onmspointerup: any; onmssitemodejumplistitemremoved: any; onmsthumbnailclick: any; onpause: any; onplay: any; onplaying: any; onpointerlockchange: any; onpointerlockerror: any; onprogress: any; onratechange: any; onreadystatechange: any; onreset: any; onscroll: any; onseeked: any; onseeking: any; onselect: any; onselectionchange: any; onselectstart: any; onstalled: any; onstop: any; onsubmit: any; onsuspend: any; ontimeupdate: any; ontouchcancel: any; ontouchend: any; ontouchmove: any; ontouchstart: any; onvolumechange: any; onwaiting: any; onwebkitfullscreenchange: any; onwebkitfullscreenerror: any; plugins: any; readonly pointerLockElement: any; readonly readyState: any; readonly referrer: any; readonly rootElement: any; scripts: any; readonly scrollingElement: any; readonly styleSheets: any; title: any; readonly URL: any; readonly URLUnencoded: any; readonly visibilityState: any; vlinkColor: any; readonly webkitCurrentFullScreenElement: any; readonly webkitFullscreenElement: any; readonly webkitFullscreenEnabled: any; readonly webkitIsFullScreen: any; readonly xmlEncoding: anyLine truncated
+>foo(xhr) : { onreadystatechange: {}; readonly readyState: { toString: any; toFixed: any; toExponential: any; toPrecision: any; valueOf: any; toLocaleString: any; }; readonly response: any; readonly responseText: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; responseType: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; readonly responseURL: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; readonly responseXML: { readonly activeElement: any; alinkColor: any; readonly all: any; anchors: any; applets: any; bgColor: any; body: any; readonly characterSet: any; charset: any; readonly compatMode: any; cookie: any; readonly currentScript: any; readonly defaultView: any; designMode: any; dir: any; readonly doctype: any; documentElement: any; domain: any; embeds: any; fgColor: any; forms: any; readonly fullscreenElement: any; readonly fullscreenEnabled: any; readonly head: any; readonly hidden: any; images: any; readonly implementation: any; readonly inputEncoding: any; readonly lastModified: any; linkColor: any; links: any; readonly location: any; msCapsLockWarningOff: any; msCSSOMElementFloatMetrics: any; onabort: any; onactivate: any; onbeforeactivate: any; onbeforedeactivate: any; onblur: any; oncanplay: any; oncanplaythrough: any; onchange: any; onclick: any; oncontextmenu: any; ondblclick: any; ondeactivate: any; ondrag: any; ondragend: any; ondragenter: any; ondragleave: any; ondragover: any; ondragstart: any; ondrop: any; ondurationchange: any; onemptied: any; onended: any; onerror: any; onfocus: any; onfullscreenchange: any; onfullscreenerror: any; oninput: any; oninvalid: any; onkeydown: any; onkeypress: any; onkeyup: any; onload: any; onloadeddata: any; onloadedmetadata: any; onloadstart: any; onmousedown: any; onmousemove: any; onmouseout: any; onmouseover: any; onmouseup: any; onmousewheel: any; onmscontentzoom: any; onmsgesturechange: any; onmsgesturedoubletap: any; onmsgestureend: any; onmsgesturehold: any; onmsgesturestart: any; onmsgesturetap: any; onmsinertiastart: any; onmsmanipulationstatechanged: any; onmspointercancel: any; onmspointerdown: any; onmspointerenter: any; onmspointerleave: any; onmspointermove: any; onmspointerout: any; onmspointerover: any; onmspointerup: any; onmssitemodejumplistitemremoved: any; onmsthumbnailclick: any; onpause: any; onplay: any; onplaying: any; onpointerlockchange: any; onpointerlockerror: any; onprogress: any; onratechange: any; onreadystatechange: any; onreset: any; onscroll: any; onseeked: any; onseeking: any; onselect: any; onselectionchange: any; onselectstart: any; onstalled: any; onstop: any; onsubmit: any; onsuspend: any; ontimeupdate: any; ontouchcancel: any; ontouchend: any; ontouchmove: any; ontouchstart: any; onvolumechange: any; onwaiting: any; onwebkitfullscreenchange: any; onwebkitfullscreenerror: any; plugins: any; readonly pointerLockElement: any; readonly readyState: any; readonly referrer: any; readonly rootElement: any; scripts: any; readonly scrollingElement: any; readonly styleSheets: any; title: any; readonly URL: any; readonly URLUnencoded: any; readonly visibilityState: any; vlinkColor: any; readonly webkitCurrentFullScreenElement: any; readonly webkitFullscreenElement: any; readonly webkitFullscreenEnabled: any; readonly webkitIsFullScreen: any; readonly xmlEncoding:Line truncated
 >foo : <T>(deep: Deep<T>) => T
 >xhr : XMLHttpRequest
 
 out2.responseXML
 >out2.responseXML : { readonly activeElement: { readonly classList: any; className: any; readonly clientHeight: any; readonly clientLeft: any; readonly clientTop: any; readonly clientWidth: any; id: any; innerHTML: any; msContentZoomFactor: any; readonly msRegionOverflow: any; onariarequest: any; oncommand: any; ongotpointercapture: any; onlostpointercapture: any; onmsgesturechange: any; onmsgesturedoubletap: any; onmsgestureend: any; onmsgesturehold: any; onmsgesturestart: any; onmsgesturetap: any; onmsgotpointercapture: any; onmsinertiastart: any; onmslostpointercapture: any; onmspointercancel: any; onmspointerdown: any; onmspointerenter: any; onmspointerleave: any; onmspointermove: any; onmspointerout: any; onmspointerover: any; onmspointerup: any; ontouchcancel: any; ontouchend: any; ontouchmove: any; ontouchstart: any; onwebkitfullscreenchange: any; onwebkitfullscreenerror: any; outerHTML: any; readonly prefix: any; readonly scrollHeight: any; scrollLeft: any; scrollTop: any; readonly scrollWidth: any; readonly tagName: any; readonly assignedSlot: any; slot: any; readonly shadowRoot: any; getAttribute: any; getAttributeNode: any; getAttributeNodeNS: any; getAttributeNS: any; getBoundingClientRect: any; getClientRects: any; getElementsByTagName: any; getElementsByTagNameNS: any; hasAttribute: any; hasAttributeNS: any; msGetRegionContent: any; msGetUntransformedBounds: any; msMatchesSelector: any; msReleasePointerCapture: any; msSetPointerCapture: any; msZoomTo: any; releasePointerCapture: any; removeAttribute: any; removeAttributeNode: any; removeAttributeNS: any; requestFullscreen: any; requestPointerLock: any; setAttribute: any; setAttributeNode: any; setAttributeNodeNS: any; setAttributeNS: any; setPointerCapture: any; webkitMatchesSelector: any; webkitRequestFullscreen: any; webkitRequestFullScreen: any; getElementsByClassName: any; matches: any; closest: any; scrollIntoView: any; scroll: any; scrollTo: any; scrollBy: any; insertAdjacentElement: any; insertAdjacentHTML: any; insertAdjacentText: any; attachShadow: any; addEventListener: any; removeEventListener: any; readonly attributes: any; readonly baseURI: any; readonly childNodes: any; readonly firstChild: any; readonly lastChild: any; readonly localName: any; readonly namespaceURI: any; readonly nextSibling: any; readonly nodeName: any; readonly nodeType: any; nodeValue: any; readonly ownerDocument: any; readonly parentElement: any; readonly parentNode: any; readonly previousSibling: any; textContent: any; appendChild: any; cloneNode: any; compareDocumentPosition: any; contains: any; hasAttributes: any; hasChildNodes: any; insertBefore: any; isDefaultNamespace: any; isEqualNode: any; isSameNode: any; lookupNamespaceURI: any; lookupPrefix: any; normalize: any; removeChild: any; replaceChild: any; readonly ATTRIBUTE_NODE: any; readonly CDATA_SECTION_NODE: any; readonly COMMENT_NODE: any; readonly DOCUMENT_FRAGMENT_NODE: any; readonly DOCUMENT_NODE: any; readonly DOCUMENT_POSITION_CONTAINED_BY: any; readonly DOCUMENT_POSITION_CONTAINS: any; readonly DOCUMENT_POSITION_DISCONNECTED: any; readonly DOCUMENT_POSITION_FOLLOWING: any; readonly DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC: any; readonly DOCUMENT_POSITION_PRECEDING: any; readonly DOCUMENT_TYPE_NODE: any; readonly ELEMENT_NODE: any; readonly ENTITY_NODE: any; readonly ENTITY_REFERENCE_NODE: any; readonly NOTATION_NODE: any; readonly PROCESSING_INSTRUCTION_NODE: any; readonly TEXT_NODE: any; dispatchEvent: any; onpointercancel: any; onpointerdown: any; onpointerenter: any; onpointerleave: any; onpointermove: any; onpointerout: any; onpointerover: any; onpointerup: any; onwheel: any; readonly childElementCount: any; readonly firstElementChild: any; readonly lastElementChild: any; readonly nextElementSibling: any; readonly previousElementSibling: any; querySelector: any; querySelectorAll: any; remove: any; readonly children: any; }; alinkColor: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; readonly all: { readonly length: any; item: any; namedItem: any; }; anchors: { item: any; namedItem: any; readonly length: any; }; applets: { item: any; namedItem: any; readonly length: any; }; bgColor: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLine truncated
->out2 : { onreadystatechange: {}; readonly readyState: { toString: any; toFixed: any; toExponential: any; toPrecision: any; valueOf: any; toLocaleString: any; }; readonly response: {}; readonly responseText: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; responseType: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; readonly responseURL: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; readonly responseXML: { readonly activeElement: any; alinkColor: any; readonly all: any; anchors: any; applets: any; bgColor: any; body: any; readonly characterSet: any; charset: any; readonly compatMode: any; cookie: any; readonly currentScript: any; readonly defaultView: any; designMode: any; dir: any; readonly doctype: any; documentElement: any; domain: any; embeds: any; fgColor: any; forms: any; readonly fullscreenElement: any; readonly fullscreenEnabled: any; readonly head: any; readonly hidden: any; images: any; readonly implementation: any; readonly inputEncoding: any; readonly lastModified: any; linkColor: any; links: any; readonly location: any; msCapsLockWarningOff: any; msCSSOMElementFloatMetrics: any; onabort: any; onactivate: any; onbeforeactivate: any; onbeforedeactivate: any; onblur: any; oncanplay: any; oncanplaythrough: any; onchange: any; onclick: any; oncontextmenu: any; ondblclick: any; ondeactivate: any; ondrag: any; ondragend: any; ondragenter: any; ondragleave: any; ondragover: any; ondragstart: any; ondrop: any; ondurationchange: any; onemptied: any; onended: any; onerror: any; onfocus: any; onfullscreenchange: any; onfullscreenerror: any; oninput: any; oninvalid: any; onkeydown: any; onkeypress: any; onkeyup: any; onload: any; onloadeddata: any; onloadedmetadata: any; onloadstart: any; onmousedown: any; onmousemove: any; onmouseout: any; onmouseover: any; onmouseup: any; onmousewheel: any; onmscontentzoom: any; onmsgesturechange: any; onmsgesturedoubletap: any; onmsgestureend: any; onmsgesturehold: any; onmsgesturestart: any; onmsgesturetap: any; onmsinertiastart: any; onmsmanipulationstatechanged: any; onmspointercancel: any; onmspointerdown: any; onmspointerenter: any; onmspointerleave: any; onmspointermove: any; onmspointerout: any; onmspointerover: any; onmspointerup: any; onmssitemodejumplistitemremoved: any; onmsthumbnailclick: any; onpause: any; onplay: any; onplaying: any; onpointerlockchange: any; onpointerlockerror: any; onprogress: any; onratechange: any; onreadystatechange: any; onreset: any; onscroll: any; onseeked: any; onseeking: any; onselect: any; onselectionchange: any; onselectstart: any; onstalled: any; onstop: any; onsubmit: any; onsuspend: any; ontimeupdate: any; ontouchcancel: any; ontouchend: any; ontouchmove: any; ontouchstart: any; onvolumechange: any; onwaiting: any; onwebkitfullscreenchange: any; onwebkitfullscreenerror: any; plugins: any; readonly pointerLockElement: any; readonly readyState: any; readonly referrer: any; readonly rootElement: any; scripts: any; readonly scrollingElement: any; readonly styleSheets: any; title: any; readonly URL: any; readonly URLUnencoded: any; readonly visibilityState: any; vlinkColor: any; readonly webkitCurrentFullScreenElement: any; readonly webkitFullscreenElement: any; readonly webkitFullscreenEnabled: any; readonly webkitIsFullScreen: any; readonly xmlEncoding: any;Line truncated
+>out2 : { onreadystatechange: {}; readonly readyState: { toString: any; toFixed: any; toExponential: any; toPrecision: any; valueOf: any; toLocaleString: any; }; readonly response: any; readonly responseText: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; responseType: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; readonly responseURL: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; readonly responseXML: { readonly activeElement: any; alinkColor: any; readonly all: any; anchors: any; applets: any; bgColor: any; body: any; readonly characterSet: any; charset: any; readonly compatMode: any; cookie: any; readonly currentScript: any; readonly defaultView: any; designMode: any; dir: any; readonly doctype: any; documentElement: any; domain: any; embeds: any; fgColor: any; forms: any; readonly fullscreenElement: any; readonly fullscreenEnabled: any; readonly head: any; readonly hidden: any; images: any; readonly implementation: any; readonly inputEncoding: any; readonly lastModified: any; linkColor: any; links: any; readonly location: any; msCapsLockWarningOff: any; msCSSOMElementFloatMetrics: any; onabort: any; onactivate: any; onbeforeactivate: any; onbeforedeactivate: any; onblur: any; oncanplay: any; oncanplaythrough: any; onchange: any; onclick: any; oncontextmenu: any; ondblclick: any; ondeactivate: any; ondrag: any; ondragend: any; ondragenter: any; ondragleave: any; ondragover: any; ondragstart: any; ondrop: any; ondurationchange: any; onemptied: any; onended: any; onerror: any; onfocus: any; onfullscreenchange: any; onfullscreenerror: any; oninput: any; oninvalid: any; onkeydown: any; onkeypress: any; onkeyup: any; onload: any; onloadeddata: any; onloadedmetadata: any; onloadstart: any; onmousedown: any; onmousemove: any; onmouseout: any; onmouseover: any; onmouseup: any; onmousewheel: any; onmscontentzoom: any; onmsgesturechange: any; onmsgesturedoubletap: any; onmsgestureend: any; onmsgesturehold: any; onmsgesturestart: any; onmsgesturetap: any; onmsinertiastart: any; onmsmanipulationstatechanged: any; onmspointercancel: any; onmspointerdown: any; onmspointerenter: any; onmspointerleave: any; onmspointermove: any; onmspointerout: any; onmspointerover: any; onmspointerup: any; onmssitemodejumplistitemremoved: any; onmsthumbnailclick: any; onpause: any; onplay: any; onplaying: any; onpointerlockchange: any; onpointerlockerror: any; onprogress: any; onratechange: any; onreadystatechange: any; onreset: any; onscroll: any; onseeked: any; onseeking: any; onselect: any; onselectionchange: any; onselectstart: any; onstalled: any; onstop: any; onsubmit: any; onsuspend: any; ontimeupdate: any; ontouchcancel: any; ontouchend: any; ontouchmove: any; ontouchstart: any; onvolumechange: any; onwaiting: any; onwebkitfullscreenchange: any; onwebkitfullscreenerror: any; plugins: any; readonly pointerLockElement: any; readonly readyState: any; readonly referrer: any; readonly rootElement: any; scripts: any; readonly scrollingElement: any; readonly styleSheets: any; title: any; readonly URL: any; readonly URLUnencoded: any; readonly visibilityState: any; vlinkColor: any; readonly webkitCurrentFullScreenElement: any; readonly webkitFullscreenElement: any; readonly webkitFullscreenEnabled: any; readonly webkitIsFullScreen: any; readonly xmlEncoding: anyLine truncated
 >responseXML : { readonly activeElement: { readonly classList: any; className: any; readonly clientHeight: any; readonly clientLeft: any; readonly clientTop: any; readonly clientWidth: any; id: any; innerHTML: any; msContentZoomFactor: any; readonly msRegionOverflow: any; onariarequest: any; oncommand: any; ongotpointercapture: any; onlostpointercapture: any; onmsgesturechange: any; onmsgesturedoubletap: any; onmsgestureend: any; onmsgesturehold: any; onmsgesturestart: any; onmsgesturetap: any; onmsgotpointercapture: any; onmsinertiastart: any; onmslostpointercapture: any; onmspointercancel: any; onmspointerdown: any; onmspointerenter: any; onmspointerleave: any; onmspointermove: any; onmspointerout: any; onmspointerover: any; onmspointerup: any; ontouchcancel: any; ontouchend: any; ontouchmove: any; ontouchstart: any; onwebkitfullscreenchange: any; onwebkitfullscreenerror: any; outerHTML: any; readonly prefix: any; readonly scrollHeight: any; scrollLeft: any; scrollTop: any; readonly scrollWidth: any; readonly tagName: any; readonly assignedSlot: any; slot: any; readonly shadowRoot: any; getAttribute: any; getAttributeNode: any; getAttributeNodeNS: any; getAttributeNS: any; getBoundingClientRect: any; getClientRects: any; getElementsByTagName: any; getElementsByTagNameNS: any; hasAttribute: any; hasAttributeNS: any; msGetRegionContent: any; msGetUntransformedBounds: any; msMatchesSelector: any; msReleasePointerCapture: any; msSetPointerCapture: any; msZoomTo: any; releasePointerCapture: any; removeAttribute: any; removeAttributeNode: any; removeAttributeNS: any; requestFullscreen: any; requestPointerLock: any; setAttribute: any; setAttributeNode: any; setAttributeNodeNS: any; setAttributeNS: any; setPointerCapture: any; webkitMatchesSelector: any; webkitRequestFullscreen: any; webkitRequestFullScreen: any; getElementsByClassName: any; matches: any; closest: any; scrollIntoView: any; scroll: any; scrollTo: any; scrollBy: any; insertAdjacentElement: any; insertAdjacentHTML: any; insertAdjacentText: any; attachShadow: any; addEventListener: any; removeEventListener: any; readonly attributes: any; readonly baseURI: any; readonly childNodes: any; readonly firstChild: any; readonly lastChild: any; readonly localName: any; readonly namespaceURI: any; readonly nextSibling: any; readonly nodeName: any; readonly nodeType: any; nodeValue: any; readonly ownerDocument: any; readonly parentElement: any; readonly parentNode: any; readonly previousSibling: any; textContent: any; appendChild: any; cloneNode: any; compareDocumentPosition: any; contains: any; hasAttributes: any; hasChildNodes: any; insertBefore: any; isDefaultNamespace: any; isEqualNode: any; isSameNode: any; lookupNamespaceURI: any; lookupPrefix: any; normalize: any; removeChild: any; replaceChild: any; readonly ATTRIBUTE_NODE: any; readonly CDATA_SECTION_NODE: any; readonly COMMENT_NODE: any; readonly DOCUMENT_FRAGMENT_NODE: any; readonly DOCUMENT_NODE: any; readonly DOCUMENT_POSITION_CONTAINED_BY: any; readonly DOCUMENT_POSITION_CONTAINS: any; readonly DOCUMENT_POSITION_DISCONNECTED: any; readonly DOCUMENT_POSITION_FOLLOWING: any; readonly DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC: any; readonly DOCUMENT_POSITION_PRECEDING: any; readonly DOCUMENT_TYPE_NODE: any; readonly ELEMENT_NODE: any; readonly ENTITY_NODE: any; readonly ENTITY_REFERENCE_NODE: any; readonly NOTATION_NODE: any; readonly PROCESSING_INSTRUCTION_NODE: any; readonly TEXT_NODE: any; dispatchEvent: any; onpointercancel: any; onpointerdown: any; onpointerenter: any; onpointerleave: any; onpointermove: any; onpointerout: any; onpointerover: any; onpointerup: any; onwheel: any; readonly childElementCount: any; readonly firstElementChild: any; readonly lastElementChild: any; readonly nextElementSibling: any; readonly previousElementSibling: any; querySelector: any; querySelectorAll: any; remove: any; readonly children: any; }; alinkColor: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; readonly all: { readonly length: any; item: any; namedItem: any; }; anchors: { item: any; namedItem: any; readonly length: any; }; applets: { item: any; namedItem: any; readonly length: any; }; bgColor: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocalLine truncated
 
 out2.responseXML.activeElement.className.length
@@ -123,7 +123,7 @@ out2.responseXML.activeElement.className.length
 >out2.responseXML.activeElement.className : { toString: {}; charAt: {}; charCodeAt: {}; concat: {}; indexOf: {}; lastIndexOf: {}; localeCompare: {}; match: {}; replace: {}; search: {}; slice: {}; split: {}; substring: {}; toLowerCase: {}; toLocaleLowerCase: {}; toUpperCase: {}; toLocaleUpperCase: {}; trim: {}; readonly length: { toString: any; toFixed: any; toExponential: any; toPrecision: any; valueOf: any; toLocaleString: any; }; substr: {}; valueOf: {}; [Symbol.iterator]: {}; codePointAt: {}; includes: {}; endsWith: {}; normalize: {}; repeat: {}; startsWith: {}; anchor: {}; big: {}; blink: {}; bold: {}; fixed: {}; fontcolor: {}; fontsize: {}; italics: {}; link: {}; small: {}; strike: {}; sub: {}; sup: {}; }
 >out2.responseXML.activeElement : { readonly classList: { readonly length: any; add: any; contains: any; item: any; remove: any; toggle: any; toString: any; }; className: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; readonly clientHeight: { toString: any; toFixed: any; toExponential: any; toPrecision: any; valueOf: any; toLocaleString: any; }; readonly clientLeft: { toString: any; toFixed: any; toExponential: any; toPrecision: any; valueOf: any; toLocaleString: any; }; readonly clientTop: { toString: any; toFixed: any; toExponential: any; toPrecision: any; valueOf: any; toLocaleString: any; }; readonly clientWidth: { toString: any; toFixed: any; toExponential: any; toPrecision: any; valueOf: any; toLocaleString: any; }; id: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; innerHTML: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; msContentZoomFactor: { toString: any; toFixed: any; toExponential: any; toPrecision: any; valueOf: any; toLocaleString: any; }; readonly msRegionOverflow: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; onariarequest: {}; oncommand: {}; ongotpointercapture: {}; onlostpointercapture: {}; onmsgesturechange: {}; onmsgesturedoubletap: {}; onmsgestureend: {}; onmsgesturehold: {}; onmsgesturestart: {}; onmsgesturetap: {}; onmsgotpointercapture: {}; onmsinertiastart: {}; onmslostpointercapture: {}; onmspointercancel: {}; onmspointerdown: {}; onmspointerenter: {}; onmspointerleave: {}; onmspointermove: {}; onmspointerout: {}; onmspointerover: {}; onmspointerup: {}; ontouchcancel: {}; ontouchend: {}; ontouchmove: {}; ontouchstart: {}; onwebkitfullscreenchange: {}; onwebkitfullscreenerror: {}; outerHTML: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; readonly prefix: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: aLine truncated
 >out2.responseXML : { readonly activeElement: { readonly classList: any; className: any; readonly clientHeight: any; readonly clientLeft: any; readonly clientTop: any; readonly clientWidth: any; id: any; innerHTML: any; msContentZoomFactor: any; readonly msRegionOverflow: any; onariarequest: any; oncommand: any; ongotpointercapture: any; onlostpointercapture: any; onmsgesturechange: any; onmsgesturedoubletap: any; onmsgestureend: any; onmsgesturehold: any; onmsgesturestart: any; onmsgesturetap: any; onmsgotpointercapture: any; onmsinertiastart: any; onmslostpointercapture: any; onmspointercancel: any; onmspointerdown: any; onmspointerenter: any; onmspointerleave: any; onmspointermove: any; onmspointerout: any; onmspointerover: any; onmspointerup: any; ontouchcancel: any; ontouchend: any; ontouchmove: any; ontouchstart: any; onwebkitfullscreenchange: any; onwebkitfullscreenerror: any; outerHTML: any; readonly prefix: any; readonly scrollHeight: any; scrollLeft: any; scrollTop: any; readonly scrollWidth: any; readonly tagName: any; readonly assignedSlot: any; slot: any; readonly shadowRoot: any; getAttribute: any; getAttributeNode: any; getAttributeNodeNS: any; getAttributeNS: any; getBoundingClientRect: any; getClientRects: any; getElementsByTagName: any; getElementsByTagNameNS: any; hasAttribute: any; hasAttributeNS: any; msGetRegionContent: any; msGetUntransformedBounds: any; msMatchesSelector: any; msReleasePointerCapture: any; msSetPointerCapture: any; msZoomTo: any; releasePointerCapture: any; removeAttribute: any; removeAttributeNode: any; removeAttributeNS: any; requestFullscreen: any; requestPointerLock: any; setAttribute: any; setAttributeNode: any; setAttributeNodeNS: any; setAttributeNS: any; setPointerCapture: any; webkitMatchesSelector: any; webkitRequestFullscreen: any; webkitRequestFullScreen: any; getElementsByClassName: any; matches: any; closest: any; scrollIntoView: any; scroll: any; scrollTo: any; scrollBy: any; insertAdjacentElement: any; insertAdjacentHTML: any; insertAdjacentText: any; attachShadow: any; addEventListener: any; removeEventListener: any; readonly attributes: any; readonly baseURI: any; readonly childNodes: any; readonly firstChild: any; readonly lastChild: any; readonly localName: any; readonly namespaceURI: any; readonly nextSibling: any; readonly nodeName: any; readonly nodeType: any; nodeValue: any; readonly ownerDocument: any; readonly parentElement: any; readonly parentNode: any; readonly previousSibling: any; textContent: any; appendChild: any; cloneNode: any; compareDocumentPosition: any; contains: any; hasAttributes: any; hasChildNodes: any; insertBefore: any; isDefaultNamespace: any; isEqualNode: any; isSameNode: any; lookupNamespaceURI: any; lookupPrefix: any; normalize: any; removeChild: any; replaceChild: any; readonly ATTRIBUTE_NODE: any; readonly CDATA_SECTION_NODE: any; readonly COMMENT_NODE: any; readonly DOCUMENT_FRAGMENT_NODE: any; readonly DOCUMENT_NODE: any; readonly DOCUMENT_POSITION_CONTAINED_BY: any; readonly DOCUMENT_POSITION_CONTAINS: any; readonly DOCUMENT_POSITION_DISCONNECTED: any; readonly DOCUMENT_POSITION_FOLLOWING: any; readonly DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC: any; readonly DOCUMENT_POSITION_PRECEDING: any; readonly DOCUMENT_TYPE_NODE: any; readonly ELEMENT_NODE: any; readonly ENTITY_NODE: any; readonly ENTITY_REFERENCE_NODE: any; readonly NOTATION_NODE: any; readonly PROCESSING_INSTRUCTION_NODE: any; readonly TEXT_NODE: any; dispatchEvent: any; onpointercancel: any; onpointerdown: any; onpointerenter: any; onpointerleave: any; onpointermove: any; onpointerout: any; onpointerover: any; onpointerup: any; onwheel: any; readonly childElementCount: any; readonly firstElementChild: any; readonly lastElementChild: any; readonly nextElementSibling: any; readonly previousElementSibling: any; querySelector: any; querySelectorAll: any; remove: any; readonly children: any; }; alinkColor: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; readonly all: { readonly length: any; item: any; namedItem: any; }; anchors: { item: any; namedItem: any; readonly length: any; }; applets: { item: any; namedItem: any; readonly length: any; }; bgColor: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLine truncated
->out2 : { onreadystatechange: {}; readonly readyState: { toString: any; toFixed: any; toExponential: any; toPrecision: any; valueOf: any; toLocaleString: any; }; readonly response: {}; readonly responseText: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; responseType: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; readonly responseURL: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; readonly responseXML: { readonly activeElement: any; alinkColor: any; readonly all: any; anchors: any; applets: any; bgColor: any; body: any; readonly characterSet: any; charset: any; readonly compatMode: any; cookie: any; readonly currentScript: any; readonly defaultView: any; designMode: any; dir: any; readonly doctype: any; documentElement: any; domain: any; embeds: any; fgColor: any; forms: any; readonly fullscreenElement: any; readonly fullscreenEnabled: any; readonly head: any; readonly hidden: any; images: any; readonly implementation: any; readonly inputEncoding: any; readonly lastModified: any; linkColor: any; links: any; readonly location: any; msCapsLockWarningOff: any; msCSSOMElementFloatMetrics: any; onabort: any; onactivate: any; onbeforeactivate: any; onbeforedeactivate: any; onblur: any; oncanplay: any; oncanplaythrough: any; onchange: any; onclick: any; oncontextmenu: any; ondblclick: any; ondeactivate: any; ondrag: any; ondragend: any; ondragenter: any; ondragleave: any; ondragover: any; ondragstart: any; ondrop: any; ondurationchange: any; onemptied: any; onended: any; onerror: any; onfocus: any; onfullscreenchange: any; onfullscreenerror: any; oninput: any; oninvalid: any; onkeydown: any; onkeypress: any; onkeyup: any; onload: any; onloadeddata: any; onloadedmetadata: any; onloadstart: any; onmousedown: any; onmousemove: any; onmouseout: any; onmouseover: any; onmouseup: any; onmousewheel: any; onmscontentzoom: any; onmsgesturechange: any; onmsgesturedoubletap: any; onmsgestureend: any; onmsgesturehold: any; onmsgesturestart: any; onmsgesturetap: any; onmsinertiastart: any; onmsmanipulationstatechanged: any; onmspointercancel: any; onmspointerdown: any; onmspointerenter: any; onmspointerleave: any; onmspointermove: any; onmspointerout: any; onmspointerover: any; onmspointerup: any; onmssitemodejumplistitemremoved: any; onmsthumbnailclick: any; onpause: any; onplay: any; onplaying: any; onpointerlockchange: any; onpointerlockerror: any; onprogress: any; onratechange: any; onreadystatechange: any; onreset: any; onscroll: any; onseeked: any; onseeking: any; onselect: any; onselectionchange: any; onselectstart: any; onstalled: any; onstop: any; onsubmit: any; onsuspend: any; ontimeupdate: any; ontouchcancel: any; ontouchend: any; ontouchmove: any; ontouchstart: any; onvolumechange: any; onwaiting: any; onwebkitfullscreenchange: any; onwebkitfullscreenerror: any; plugins: any; readonly pointerLockElement: any; readonly readyState: any; readonly referrer: any; readonly rootElement: any; scripts: any; readonly scrollingElement: any; readonly styleSheets: any; title: any; readonly URL: any; readonly URLUnencoded: any; readonly visibilityState: any; vlinkColor: any; readonly webkitCurrentFullScreenElement: any; readonly webkitFullscreenElement: any; readonly webkitFullscreenEnabled: any; readonly webkitIsFullScreen: any; readonly xmlEncoding: any;Line truncated
+>out2 : { onreadystatechange: {}; readonly readyState: { toString: any; toFixed: any; toExponential: any; toPrecision: any; valueOf: any; toLocaleString: any; }; readonly response: any; readonly responseText: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; responseType: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; readonly responseURL: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; readonly responseXML: { readonly activeElement: any; alinkColor: any; readonly all: any; anchors: any; applets: any; bgColor: any; body: any; readonly characterSet: any; charset: any; readonly compatMode: any; cookie: any; readonly currentScript: any; readonly defaultView: any; designMode: any; dir: any; readonly doctype: any; documentElement: any; domain: any; embeds: any; fgColor: any; forms: any; readonly fullscreenElement: any; readonly fullscreenEnabled: any; readonly head: any; readonly hidden: any; images: any; readonly implementation: any; readonly inputEncoding: any; readonly lastModified: any; linkColor: any; links: any; readonly location: any; msCapsLockWarningOff: any; msCSSOMElementFloatMetrics: any; onabort: any; onactivate: any; onbeforeactivate: any; onbeforedeactivate: any; onblur: any; oncanplay: any; oncanplaythrough: any; onchange: any; onclick: any; oncontextmenu: any; ondblclick: any; ondeactivate: any; ondrag: any; ondragend: any; ondragenter: any; ondragleave: any; ondragover: any; ondragstart: any; ondrop: any; ondurationchange: any; onemptied: any; onended: any; onerror: any; onfocus: any; onfullscreenchange: any; onfullscreenerror: any; oninput: any; oninvalid: any; onkeydown: any; onkeypress: any; onkeyup: any; onload: any; onloadeddata: any; onloadedmetadata: any; onloadstart: any; onmousedown: any; onmousemove: any; onmouseout: any; onmouseover: any; onmouseup: any; onmousewheel: any; onmscontentzoom: any; onmsgesturechange: any; onmsgesturedoubletap: any; onmsgestureend: any; onmsgesturehold: any; onmsgesturestart: any; onmsgesturetap: any; onmsinertiastart: any; onmsmanipulationstatechanged: any; onmspointercancel: any; onmspointerdown: any; onmspointerenter: any; onmspointerleave: any; onmspointermove: any; onmspointerout: any; onmspointerover: any; onmspointerup: any; onmssitemodejumplistitemremoved: any; onmsthumbnailclick: any; onpause: any; onplay: any; onplaying: any; onpointerlockchange: any; onpointerlockerror: any; onprogress: any; onratechange: any; onreadystatechange: any; onreset: any; onscroll: any; onseeked: any; onseeking: any; onselect: any; onselectionchange: any; onselectstart: any; onstalled: any; onstop: any; onsubmit: any; onsuspend: any; ontimeupdate: any; ontouchcancel: any; ontouchend: any; ontouchmove: any; ontouchstart: any; onvolumechange: any; onwaiting: any; onwebkitfullscreenchange: any; onwebkitfullscreenerror: any; plugins: any; readonly pointerLockElement: any; readonly readyState: any; readonly referrer: any; readonly rootElement: any; scripts: any; readonly scrollingElement: any; readonly styleSheets: any; title: any; readonly URL: any; readonly URLUnencoded: any; readonly visibilityState: any; vlinkColor: any; readonly webkitCurrentFullScreenElement: any; readonly webkitFullscreenElement: any; readonly webkitFullscreenEnabled: any; readonly webkitIsFullScreen: any; readonly xmlEncoding: anyLine truncated
 >responseXML : { readonly activeElement: { readonly classList: any; className: any; readonly clientHeight: any; readonly clientLeft: any; readonly clientTop: any; readonly clientWidth: any; id: any; innerHTML: any; msContentZoomFactor: any; readonly msRegionOverflow: any; onariarequest: any; oncommand: any; ongotpointercapture: any; onlostpointercapture: any; onmsgesturechange: any; onmsgesturedoubletap: any; onmsgestureend: any; onmsgesturehold: any; onmsgesturestart: any; onmsgesturetap: any; onmsgotpointercapture: any; onmsinertiastart: any; onmslostpointercapture: any; onmspointercancel: any; onmspointerdown: any; onmspointerenter: any; onmspointerleave: any; onmspointermove: any; onmspointerout: any; onmspointerover: any; onmspointerup: any; ontouchcancel: any; ontouchend: any; ontouchmove: any; ontouchstart: any; onwebkitfullscreenchange: any; onwebkitfullscreenerror: any; outerHTML: any; readonly prefix: any; readonly scrollHeight: any; scrollLeft: any; scrollTop: any; readonly scrollWidth: any; readonly tagName: any; readonly assignedSlot: any; slot: any; readonly shadowRoot: any; getAttribute: any; getAttributeNode: any; getAttributeNodeNS: any; getAttributeNS: any; getBoundingClientRect: any; getClientRects: any; getElementsByTagName: any; getElementsByTagNameNS: any; hasAttribute: any; hasAttributeNS: any; msGetRegionContent: any; msGetUntransformedBounds: any; msMatchesSelector: any; msReleasePointerCapture: any; msSetPointerCapture: any; msZoomTo: any; releasePointerCapture: any; removeAttribute: any; removeAttributeNode: any; removeAttributeNS: any; requestFullscreen: any; requestPointerLock: any; setAttribute: any; setAttributeNode: any; setAttributeNodeNS: any; setAttributeNS: any; setPointerCapture: any; webkitMatchesSelector: any; webkitRequestFullscreen: any; webkitRequestFullScreen: any; getElementsByClassName: any; matches: any; closest: any; scrollIntoView: any; scroll: any; scrollTo: any; scrollBy: any; insertAdjacentElement: any; insertAdjacentHTML: any; insertAdjacentText: any; attachShadow: any; addEventListener: any; removeEventListener: any; readonly attributes: any; readonly baseURI: any; readonly childNodes: any; readonly firstChild: any; readonly lastChild: any; readonly localName: any; readonly namespaceURI: any; readonly nextSibling: any; readonly nodeName: any; readonly nodeType: any; nodeValue: any; readonly ownerDocument: any; readonly parentElement: any; readonly parentNode: any; readonly previousSibling: any; textContent: any; appendChild: any; cloneNode: any; compareDocumentPosition: any; contains: any; hasAttributes: any; hasChildNodes: any; insertBefore: any; isDefaultNamespace: any; isEqualNode: any; isSameNode: any; lookupNamespaceURI: any; lookupPrefix: any; normalize: any; removeChild: any; replaceChild: any; readonly ATTRIBUTE_NODE: any; readonly CDATA_SECTION_NODE: any; readonly COMMENT_NODE: any; readonly DOCUMENT_FRAGMENT_NODE: any; readonly DOCUMENT_NODE: any; readonly DOCUMENT_POSITION_CONTAINED_BY: any; readonly DOCUMENT_POSITION_CONTAINS: any; readonly DOCUMENT_POSITION_DISCONNECTED: any; readonly DOCUMENT_POSITION_FOLLOWING: any; readonly DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC: any; readonly DOCUMENT_POSITION_PRECEDING: any; readonly DOCUMENT_TYPE_NODE: any; readonly ELEMENT_NODE: any; readonly ENTITY_NODE: any; readonly ENTITY_REFERENCE_NODE: any; readonly NOTATION_NODE: any; readonly PROCESSING_INSTRUCTION_NODE: any; readonly TEXT_NODE: any; dispatchEvent: any; onpointercancel: any; onpointerdown: any; onpointerenter: any; onpointerleave: any; onpointermove: any; onpointerout: any; onpointerover: any; onpointerup: any; onwheel: any; readonly childElementCount: any; readonly firstElementChild: any; readonly lastElementChild: any; readonly nextElementSibling: any; readonly previousElementSibling: any; querySelector: any; querySelectorAll: any; remove: any; readonly children: any; }; alinkColor: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; readonly all: { readonly length: any; item: any; namedItem: any; }; anchors: { item: any; namedItem: any; readonly length: any; }; applets: { item: any; namedItem: any; readonly length: any; }; bgColor: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocalLine truncated
 >activeElement : { readonly classList: { readonly length: any; add: any; contains: any; item: any; remove: any; toggle: any; toString: any; }; className: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; readonly clientHeight: { toString: any; toFixed: any; toExponential: any; toPrecision: any; valueOf: any; toLocaleString: any; }; readonly clientLeft: { toString: any; toFixed: any; toExponential: any; toPrecision: any; valueOf: any; toLocaleString: any; }; readonly clientTop: { toString: any; toFixed: any; toExponential: any; toPrecision: any; valueOf: any; toLocaleString: any; }; readonly clientWidth: { toString: any; toFixed: any; toExponential: any; toPrecision: any; valueOf: any; toLocaleString: any; }; id: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; innerHTML: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; msContentZoomFactor: { toString: any; toFixed: any; toExponential: any; toPrecision: any; valueOf: any; toLocaleString: any; }; readonly msRegionOverflow: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; onariarequest: {}; oncommand: {}; ongotpointercapture: {}; onlostpointercapture: {}; onmsgesturechange: {}; onmsgesturedoubletap: {}; onmsgestureend: {}; onmsgesturehold: {}; onmsgesturestart: {}; onmsgesturetap: {}; onmsgotpointercapture: {}; onmsinertiastart: {}; onmslostpointercapture: {}; onmspointercancel: {}; onmspointerdown: {}; onmspointerenter: {}; onmspointerleave: {}; onmspointermove: {}; onmspointerout: {}; onmspointerover: {}; onmspointerup: {}; ontouchcancel: {}; ontouchend: {}; ontouchmove: {}; ontouchstart: {}; onwebkitfullscreenchange: {}; onwebkitfullscreenerror: {}; outerHTML: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; big: any; blink: any; bold: any; fixed: any; fontcolor: any; fontsize: any; italics: any; link: any; small: any; strike: any; sub: any; sup: any; }; readonly prefix: { toString: any; charAt: any; charCodeAt: any; concat: any; indexOf: any; lastIndexOf: any; localeCompare: any; match: any; replace: any; search: any; slice: any; split: any; substring: any; toLowerCase: any; toLocaleLowerCase: any; toUpperCase: any; toLocaleUpperCase: any; trim: any; readonly length: any; substr: any; valueOf: any; [Symbol.iterator]: any; codePointAt: any; includes: any; endsWith: any; normalize: any; repeat: any; startsWith: any; anchor: any; Line truncated
 >className : { toString: {}; charAt: {}; charCodeAt: {}; concat: {}; indexOf: {}; lastIndexOf: {}; localeCompare: {}; match: {}; replace: {}; search: {}; slice: {}; split: {}; substring: {}; toLowerCase: {}; toLocaleLowerCase: {}; toUpperCase: {}; toLocaleUpperCase: {}; trim: {}; readonly length: { toString: any; toFixed: any; toExponential: any; toPrecision: any; valueOf: any; toLocaleString: any; }; substr: {}; valueOf: {}; [Symbol.iterator]: {}; codePointAt: {}; includes: {}; endsWith: {}; normalize: {}; repeat: {}; startsWith: {}; anchor: {}; big: {}; blink: {}; bold: {}; fixed: {}; fontcolor: {}; fontsize: {}; italics: {}; link: {}; small: {}; strike: {}; sub: {}; sup: {}; }

tests/cases/conformance/types/conditional/conditionalTypes1.ts

@@ -66,7 +66,7 @@ type TypeName<T> =
 
 type T20 = TypeName<string | (() => void)>;  // "string" | "function"
 type T21 = TypeName<any>;  // "string" | "number" | "boolean" | "undefined" | "function" | "object"
-type T22 = TypeName<never>;  // "string" | "number" | "boolean" | "undefined" | "function" | "object"
+type T22 = TypeName<never>;  // never
 type T23 = TypeName<{}>;  // "object"
 
 type KnockoutObservable<T> = { object: T };
@@ -174,7 +174,7 @@ type IsString<T> = Extends<T, string>;
 type Q1 = IsString<number>;  // false
 type Q2 = IsString<"abc">;  // true
 type Q3 = IsString<any>;  // boolean
-type Q4 = IsString<never>;  // boolean
+type Q4 = IsString<never>;  // never
 
 type N1 = Not<false>;  // true
 type N2 = Not<true>;  // false
@@ -202,9 +202,9 @@ type O9 = Or<boolean, boolean>;  // boolean
 
 type T40 = never extends never ? true : false;  // true
 type T41 = number extends never ? true : false;  // false
-type T42 = never extends number ? true : false;  // boolean
+type T42 = never extends number ? true : false;  // true
 
-type IsNever<T> = T extends never ? true : false;
+type IsNever<T> = [T] extends [never] ? true : false;
 
 type T50 = IsNever<never>;  // true
 type T51 = IsNever<number>;  // false

tests/cases/conformance/types/conditional/inferTypes1.ts

@@ -30,26 +30,26 @@ type T12 = ReturnType<(<T>() => T)>;  // {}
 type T13 = ReturnType<(<T extends U, U extends number[]>() => T)>;  // number[]
 type T14 = ReturnType<typeof f1>;  // { a: number, b: string }
 type T15 = ReturnType<any>;  // any
-type T16 = ReturnType<never>;  // any
+type T16 = ReturnType<never>;  // never
 type T17 = ReturnType<string>;  // Error
 type T18 = ReturnType<Function>;  // Error
 
 type U10 = InstanceType<typeof C>;  // C
 type U11 = InstanceType<any>;  // any
-type U12 = InstanceType<never>;  // any
+type U12 = InstanceType<never>;  // never
 type U13 = InstanceType<string>;  // Error
 type U14 = InstanceType<Function>;  // Error
 
 type ArgumentType<T extends (x: any) => any> = T extends (a: infer A) => any ? A : any;
 
-type T20 = ArgumentType<() => void>;  // never
+type T20 = ArgumentType<() => void>;  // {}
 type T21 = ArgumentType<(x: string) => number>;  // string
 type T22 = ArgumentType<(x?: string) => number>;  // string | undefined
 type T23 = ArgumentType<(...args: string[]) => number>;  // string
 type T24 = ArgumentType<(x: string, y: string) => number>;  // Error
 type T25 = ArgumentType<Function>;  // Error
 type T26 = ArgumentType<any>;  // any
-type T27 = ArgumentType<never>;  // any
+type T27 = ArgumentType<never>;  // never
 
 type X1<T extends { x: any, y: any }> = T extends { x: infer X, y: infer Y } ? [X, Y] : any;