[typescript-fetch] Make instanceOf infer type and check for undefineds (#18694)

modules/openapi-generator/src/main/resources/typescript-fetch/modelGeneric.mustache

@@ -20,10 +20,10 @@ import { {{modelName}}FromJSONTyped } from './{{modelName}}{{importFileExtension
 /**
  * Check if a given object implements the {{classname}} interface.
  */
-export function instanceOf{{classname}}(value: object): boolean {
+export function instanceOf{{classname}}(value: object): value is {{classname}} {
     {{#vars}}
     {{#required}}
-    if (!('{{name}}' in value)) return false;
+    if (!('{{name}}' in value) || value['{{name}}'] === undefined) return false;
     {{/required}}
     {{/vars}}
     return true;

samples/client/petstore/typescript-fetch/builds/allOf-nullable/models/Club.ts

@@ -37,7 +37,7 @@ export interface Club {
 /**
  * Check if a given object implements the Club interface.
  */
-export function instanceOfClub(value: object): boolean {
+export function instanceOfClub(value: object): value is Club {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/allOf-nullable/models/Owner.ts

@@ -30,7 +30,7 @@ export interface Owner {
 /**
  * Check if a given object implements the Owner interface.
  */
-export function instanceOfOwner(value: object): boolean {
+export function instanceOfOwner(value: object): value is Owner {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/allOf-readonly/models/Club.ts

@@ -37,7 +37,7 @@ export interface Club {
 /**
  * Check if a given object implements the Club interface.
  */
-export function instanceOfClub(value: object): boolean {
+export function instanceOfClub(value: object): value is Club {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/allOf-readonly/models/Owner.ts

@@ -30,7 +30,7 @@ export interface Owner {
 /**
  * Check if a given object implements the Owner interface.
  */
-export function instanceOfOwner(value: object): boolean {
+export function instanceOfOwner(value: object): value is Owner {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/AdditionalPropertiesClass.ts

@@ -36,7 +36,7 @@ export interface AdditionalPropertiesClass {
 /**
  * Check if a given object implements the AdditionalPropertiesClass interface.
  */
-export function instanceOfAdditionalPropertiesClass(value: object): boolean {
+export function instanceOfAdditionalPropertiesClass(value: object): value is AdditionalPropertiesClass {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/AllOfWithSingleRef.ts

@@ -43,7 +43,7 @@ export interface AllOfWithSingleRef {
 /**
  * Check if a given object implements the AllOfWithSingleRef interface.
  */
-export function instanceOfAllOfWithSingleRef(value: object): boolean {
+export function instanceOfAllOfWithSingleRef(value: object): value is AllOfWithSingleRef {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/Animal.ts

@@ -38,8 +38,8 @@ export interface Animal {
 /**
  * Check if a given object implements the Animal interface.
  */
-export function instanceOfAnimal(value: object): boolean {
-    if (!('className' in value)) return false;
+export function instanceOfAnimal(value: object): value is Animal {
+    if (!('className' in value) || value['className'] === undefined) return false;
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/ArrayOfArrayOfNumberOnly.ts

@@ -30,7 +30,7 @@ export interface ArrayOfArrayOfNumberOnly {
 /**
  * Check if a given object implements the ArrayOfArrayOfNumberOnly interface.
  */
-export function instanceOfArrayOfArrayOfNumberOnly(value: object): boolean {
+export function instanceOfArrayOfArrayOfNumberOnly(value: object): value is ArrayOfArrayOfNumberOnly {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/ArrayOfNumberOnly.ts

@@ -30,7 +30,7 @@ export interface ArrayOfNumberOnly {
 /**
  * Check if a given object implements the ArrayOfNumberOnly interface.
  */
-export function instanceOfArrayOfNumberOnly(value: object): boolean {
+export function instanceOfArrayOfNumberOnly(value: object): value is ArrayOfNumberOnly {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/ArrayTest.ts

@@ -49,7 +49,7 @@ export interface ArrayTest {
 /**
  * Check if a given object implements the ArrayTest interface.
  */
-export function instanceOfArrayTest(value: object): boolean {
+export function instanceOfArrayTest(value: object): value is ArrayTest {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/Capitalization.ts

@@ -61,7 +61,7 @@ export interface Capitalization {
 /**
  * Check if a given object implements the Capitalization interface.
  */
-export function instanceOfCapitalization(value: object): boolean {
+export function instanceOfCapitalization(value: object): value is Capitalization {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/Cat.ts

@@ -37,7 +37,7 @@ export interface Cat extends Animal {
 /**
  * Check if a given object implements the Cat interface.
  */
-export function instanceOfCat(value: object): boolean {
+export function instanceOfCat(value: object): value is Cat {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/Category.ts

@@ -36,8 +36,8 @@ export interface Category {
 /**
  * Check if a given object implements the Category interface.
  */
-export function instanceOfCategory(value: object): boolean {
-    if (!('name' in value)) return false;
+export function instanceOfCategory(value: object): value is Category {
+    if (!('name' in value) || value['name'] === undefined) return false;
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/ChildWithNullable.ts

@@ -39,7 +39,7 @@ export interface ChildWithNullable extends ParentWithNullable {
 /**
  * Check if a given object implements the ChildWithNullable interface.
  */
-export function instanceOfChildWithNullable(value: object): boolean {
+export function instanceOfChildWithNullable(value: object): value is ChildWithNullable {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/ClassModel.ts

@@ -30,7 +30,7 @@ export interface ClassModel {
 /**
  * Check if a given object implements the ClassModel interface.
  */
-export function instanceOfClassModel(value: object): boolean {
+export function instanceOfClassModel(value: object): value is ClassModel {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/Client.ts

@@ -30,7 +30,7 @@ export interface Client {
 /**
  * Check if a given object implements the Client interface.
  */
-export function instanceOfClient(value: object): boolean {
+export function instanceOfClient(value: object): value is Client {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/DeprecatedObject.ts

@@ -30,7 +30,7 @@ export interface DeprecatedObject {
 /**
  * Check if a given object implements the DeprecatedObject interface.
  */
-export function instanceOfDeprecatedObject(value: object): boolean {
+export function instanceOfDeprecatedObject(value: object): value is DeprecatedObject {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/Dog.ts

@@ -37,7 +37,7 @@ export interface Dog extends Animal {
 /**
  * Check if a given object implements the Dog interface.
  */
-export function instanceOfDog(value: object): boolean {
+export function instanceOfDog(value: object): value is Dog {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/EnumArrays.ts

@@ -56,7 +56,7 @@ export type EnumArraysArrayEnumEnum = typeof EnumArraysArrayEnumEnum[keyof typeo
 /**
  * Check if a given object implements the EnumArrays interface.
  */
-export function instanceOfEnumArrays(value: object): boolean {
+export function instanceOfEnumArrays(value: object): value is EnumArrays {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/EnumTest.ts

@@ -137,8 +137,8 @@ export type EnumTestEnumNumberEnum = typeof EnumTestEnumNumberEnum[keyof typeof
 /**
  * Check if a given object implements the EnumTest interface.
  */
-export function instanceOfEnumTest(value: object): boolean {
-    if (!('enumStringRequired' in value)) return false;
+export function instanceOfEnumTest(value: object): value is EnumTest {
+    if (!('enumStringRequired' in value) || value['enumStringRequired'] === undefined) return false;
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/FakeBigDecimalMap200Response.ts

@@ -36,7 +36,7 @@ export interface FakeBigDecimalMap200Response {
 /**
  * Check if a given object implements the FakeBigDecimalMap200Response interface.
  */
-export function instanceOfFakeBigDecimalMap200Response(value: object): boolean {
+export function instanceOfFakeBigDecimalMap200Response(value: object): value is FakeBigDecimalMap200Response {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/FileSchemaTestClass.ts

@@ -36,7 +36,7 @@ export interface FileSchemaTestClass {
 /**
  * Check if a given object implements the FileSchemaTestClass interface.
  */
-export function instanceOfFileSchemaTestClass(value: object): boolean {
+export function instanceOfFileSchemaTestClass(value: object): value is FileSchemaTestClass {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/Foo.ts

@@ -30,7 +30,7 @@ export interface Foo {
 /**
  * Check if a given object implements the Foo interface.
  */
-export function instanceOfFoo(value: object): boolean {
+export function instanceOfFoo(value: object): value is Foo {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/FooGetDefaultResponse.ts

@@ -37,7 +37,7 @@ export interface FooGetDefaultResponse {
 /**
  * Check if a given object implements the FooGetDefaultResponse interface.
  */
-export function instanceOfFooGetDefaultResponse(value: object): boolean {
+export function instanceOfFooGetDefaultResponse(value: object): value is FooGetDefaultResponse {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/FormatTest.ts

@@ -127,11 +127,11 @@ export interface FormatTest {
 /**
  * Check if a given object implements the FormatTest interface.
  */
-export function instanceOfFormatTest(value: object): boolean {
-    if (!('number' in value)) return false;
-    if (!('_byte' in value)) return false;
-    if (!('date' in value)) return false;
-    if (!('password' in value)) return false;
+export function instanceOfFormatTest(value: object): value is FormatTest {
+    if (!('number' in value) || value['number'] === undefined) return false;
+    if (!('_byte' in value) || value['_byte'] === undefined) return false;
+    if (!('date' in value) || value['date'] === undefined) return false;
+    if (!('password' in value) || value['password'] === undefined) return false;
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/HasOnlyReadOnly.ts

@@ -36,7 +36,7 @@ export interface HasOnlyReadOnly {
 /**
  * Check if a given object implements the HasOnlyReadOnly interface.
  */
-export function instanceOfHasOnlyReadOnly(value: object): boolean {
+export function instanceOfHasOnlyReadOnly(value: object): value is HasOnlyReadOnly {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/HealthCheckResult.ts

@@ -30,7 +30,7 @@ export interface HealthCheckResult {
 /**
  * Check if a given object implements the HealthCheckResult interface.
  */
-export function instanceOfHealthCheckResult(value: object): boolean {
+export function instanceOfHealthCheckResult(value: object): value is HealthCheckResult {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/List.ts

@@ -30,7 +30,7 @@ export interface List {
 /**
  * Check if a given object implements the List interface.
  */
-export function instanceOfList(value: object): boolean {
+export function instanceOfList(value: object): value is List {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/MapTest.ts

@@ -59,7 +59,7 @@ export type MapTestMapOfEnumStringEnum = typeof MapTestMapOfEnumStringEnum[keyof
 /**
  * Check if a given object implements the MapTest interface.
  */
-export function instanceOfMapTest(value: object): boolean {
+export function instanceOfMapTest(value: object): value is MapTest {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/MixedPropertiesAndAdditionalPropertiesClass.ts

@@ -49,7 +49,7 @@ export interface MixedPropertiesAndAdditionalPropertiesClass {
 /**
  * Check if a given object implements the MixedPropertiesAndAdditionalPropertiesClass interface.
  */
-export function instanceOfMixedPropertiesAndAdditionalPropertiesClass(value: object): boolean {
+export function instanceOfMixedPropertiesAndAdditionalPropertiesClass(value: object): value is MixedPropertiesAndAdditionalPropertiesClass {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/Model200Response.ts

@@ -36,7 +36,7 @@ export interface Model200Response {
 /**
  * Check if a given object implements the Model200Response interface.
  */
-export function instanceOfModel200Response(value: object): boolean {
+export function instanceOfModel200Response(value: object): value is Model200Response {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/ModelApiResponse.ts

@@ -42,7 +42,7 @@ export interface ModelApiResponse {
 /**
  * Check if a given object implements the ModelApiResponse interface.
  */
-export function instanceOfModelApiResponse(value: object): boolean {
+export function instanceOfModelApiResponse(value: object): value is ModelApiResponse {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/ModelFile.ts

@@ -30,7 +30,7 @@ export interface ModelFile {
 /**
  * Check if a given object implements the ModelFile interface.
  */
-export function instanceOfModelFile(value: object): boolean {
+export function instanceOfModelFile(value: object): value is ModelFile {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/Name.ts

@@ -48,8 +48,8 @@ export interface Name {
 /**
  * Check if a given object implements the Name interface.
  */
-export function instanceOfName(value: object): boolean {
-    if (!('name' in value)) return false;
+export function instanceOfName(value: object): value is Name {
+    if (!('name' in value) || value['name'] === undefined) return false;
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/NullableClass.ts

@@ -97,7 +97,7 @@ export interface NullableClass {
 /**
  * Check if a given object implements the NullableClass interface.
  */
-export function instanceOfNullableClass(value: object): boolean {
+export function instanceOfNullableClass(value: object): value is NullableClass {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/NumberOnly.ts

@@ -30,7 +30,7 @@ export interface NumberOnly {
 /**
  * Check if a given object implements the NumberOnly interface.
  */
-export function instanceOfNumberOnly(value: object): boolean {
+export function instanceOfNumberOnly(value: object): value is NumberOnly {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/ObjectWithDeprecatedFields.ts

@@ -58,7 +58,7 @@ export interface ObjectWithDeprecatedFields {
 /**
  * Check if a given object implements the ObjectWithDeprecatedFields interface.
  */
-export function instanceOfObjectWithDeprecatedFields(value: object): boolean {
+export function instanceOfObjectWithDeprecatedFields(value: object): value is ObjectWithDeprecatedFields {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/Order.ts

@@ -72,7 +72,7 @@ export type OrderStatusEnum = typeof OrderStatusEnum[keyof typeof OrderStatusEnu
 /**
  * Check if a given object implements the Order interface.
  */
-export function instanceOfOrder(value: object): boolean {
+export function instanceOfOrder(value: object): value is Order {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/OuterComposite.ts

@@ -42,7 +42,7 @@ export interface OuterComposite {
 /**
  * Check if a given object implements the OuterComposite interface.
  */
-export function instanceOfOuterComposite(value: object): boolean {
+export function instanceOfOuterComposite(value: object): value is OuterComposite {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/OuterObjectWithEnumProperty.ts

@@ -37,8 +37,8 @@ export interface OuterObjectWithEnumProperty {
 /**
  * Check if a given object implements the OuterObjectWithEnumProperty interface.
  */
-export function instanceOfOuterObjectWithEnumProperty(value: object): boolean {
-    if (!('value' in value)) return false;
+export function instanceOfOuterObjectWithEnumProperty(value: object): value is OuterObjectWithEnumProperty {
+    if (!('value' in value) || value['value'] === undefined) return false;
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/ParentWithNullable.ts

@@ -47,7 +47,7 @@ export type ParentWithNullableTypeEnum = typeof ParentWithNullableTypeEnum[keyof
 /**
  * Check if a given object implements the ParentWithNullable interface.
  */
-export function instanceOfParentWithNullable(value: object): boolean {
+export function instanceOfParentWithNullable(value: object): value is ParentWithNullable {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/Pet.ts

@@ -85,9 +85,9 @@ export type PetStatusEnum = typeof PetStatusEnum[keyof typeof PetStatusEnum];
 /**
  * Check if a given object implements the Pet interface.
  */
-export function instanceOfPet(value: object): boolean {
-    if (!('name' in value)) return false;
-    if (!('photoUrls' in value)) return false;
+export function instanceOfPet(value: object): value is Pet {
+    if (!('name' in value) || value['name'] === undefined) return false;
+    if (!('photoUrls' in value) || value['photoUrls'] === undefined) return false;
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/ReadOnlyFirst.ts

@@ -36,7 +36,7 @@ export interface ReadOnlyFirst {
 /**
  * Check if a given object implements the ReadOnlyFirst interface.
  */
-export function instanceOfReadOnlyFirst(value: object): boolean {
+export function instanceOfReadOnlyFirst(value: object): value is ReadOnlyFirst {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/Return.ts

@@ -30,7 +30,7 @@ export interface Return {
 /**
  * Check if a given object implements the Return interface.
  */
-export function instanceOfReturn(value: object): boolean {
+export function instanceOfReturn(value: object): value is Return {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/SpecialModelName.ts

@@ -30,7 +30,7 @@ export interface SpecialModelName {
 /**
  * Check if a given object implements the SpecialModelName interface.
  */
-export function instanceOfSpecialModelName(value: object): boolean {
+export function instanceOfSpecialModelName(value: object): value is SpecialModelName {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/Tag.ts

@@ -36,7 +36,7 @@ export interface Tag {
 /**
  * Check if a given object implements the Tag interface.
  */
-export function instanceOfTag(value: object): boolean {
+export function instanceOfTag(value: object): value is Tag {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/TestInlineFreeformAdditionalPropertiesRequest.ts

@@ -31,7 +31,7 @@ export interface TestInlineFreeformAdditionalPropertiesRequest {
 /**
  * Check if a given object implements the TestInlineFreeformAdditionalPropertiesRequest interface.
  */
-export function instanceOfTestInlineFreeformAdditionalPropertiesRequest(value: object): boolean {
+export function instanceOfTestInlineFreeformAdditionalPropertiesRequest(value: object): value is TestInlineFreeformAdditionalPropertiesRequest {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default-v3.0/models/User.ts

@@ -72,7 +72,7 @@ export interface User {
 /**
  * Check if a given object implements the User interface.
  */
-export function instanceOfUser(value: object): boolean {
+export function instanceOfUser(value: object): value is User {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default/models/Category.ts

@@ -36,7 +36,7 @@ export interface Category {
 /**
  * Check if a given object implements the Category interface.
  */
-export function instanceOfCategory(value: object): boolean {
+export function instanceOfCategory(value: object): value is Category {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default/models/ModelApiResponse.ts

@@ -42,7 +42,7 @@ export interface ModelApiResponse {
 /**
  * Check if a given object implements the ModelApiResponse interface.
  */
-export function instanceOfModelApiResponse(value: object): boolean {
+export function instanceOfModelApiResponse(value: object): value is ModelApiResponse {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default/models/Order.ts

@@ -72,7 +72,7 @@ export type OrderStatusEnum = typeof OrderStatusEnum[keyof typeof OrderStatusEnu
 /**
  * Check if a given object implements the Order interface.
  */
-export function instanceOfOrder(value: object): boolean {
+export function instanceOfOrder(value: object): value is Order {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default/models/Pet.ts

@@ -85,9 +85,9 @@ export type PetStatusEnum = typeof PetStatusEnum[keyof typeof PetStatusEnum];
 /**
  * Check if a given object implements the Pet interface.
  */
-export function instanceOfPet(value: object): boolean {
-    if (!('name' in value)) return false;
-    if (!('photoUrls' in value)) return false;
+export function instanceOfPet(value: object): value is Pet {
+    if (!('name' in value) || value['name'] === undefined) return false;
+    if (!('photoUrls' in value) || value['photoUrls'] === undefined) return false;
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default/models/Tag.ts

@@ -36,7 +36,7 @@ export interface Tag {
 /**
  * Check if a given object implements the Tag interface.
  */
-export function instanceOfTag(value: object): boolean {
+export function instanceOfTag(value: object): value is Tag {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/default/models/User.ts

@@ -72,7 +72,7 @@ export interface User {
 /**
  * Check if a given object implements the User interface.
  */
-export function instanceOfUser(value: object): boolean {
+export function instanceOfUser(value: object): value is User {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/enum/models/EnumPatternObject.ts

@@ -61,7 +61,7 @@ export interface EnumPatternObject {
 /**
  * Check if a given object implements the EnumPatternObject interface.
  */
-export function instanceOfEnumPatternObject(value: object): boolean {
+export function instanceOfEnumPatternObject(value: object): value is EnumPatternObject {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/enum/models/FakeEnumRequestGetInline200Response.ts

@@ -90,7 +90,7 @@ export type FakeEnumRequestGetInline200ResponseNullableNumberEnumEnum = typeof F
 /**
  * Check if a given object implements the FakeEnumRequestGetInline200Response interface.
  */
-export function instanceOfFakeEnumRequestGetInline200Response(value: object): boolean {
+export function instanceOfFakeEnumRequestGetInline200Response(value: object): value is FakeEnumRequestGetInline200Response {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/es6-target/src/models/Category.ts

@@ -36,7 +36,7 @@ export interface Category {
 /**
  * Check if a given object implements the Category interface.
  */
-export function instanceOfCategory(value: object): boolean {
+export function instanceOfCategory(value: object): value is Category {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/es6-target/src/models/ModelApiResponse.ts

@@ -42,7 +42,7 @@ export interface ModelApiResponse {
 /**
  * Check if a given object implements the ModelApiResponse interface.
  */
-export function instanceOfModelApiResponse(value: object): boolean {
+export function instanceOfModelApiResponse(value: object): value is ModelApiResponse {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/es6-target/src/models/Order.ts

@@ -72,7 +72,7 @@ export type OrderStatusEnum = typeof OrderStatusEnum[keyof typeof OrderStatusEnu
 /**
  * Check if a given object implements the Order interface.
  */
-export function instanceOfOrder(value: object): boolean {
+export function instanceOfOrder(value: object): value is Order {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/es6-target/src/models/Pet.ts

@@ -85,9 +85,9 @@ export type PetStatusEnum = typeof PetStatusEnum[keyof typeof PetStatusEnum];
 /**
  * Check if a given object implements the Pet interface.
  */
-export function instanceOfPet(value: object): boolean {
-    if (!('name' in value)) return false;
-    if (!('photoUrls' in value)) return false;
+export function instanceOfPet(value: object): value is Pet {
+    if (!('name' in value) || value['name'] === undefined) return false;
+    if (!('photoUrls' in value) || value['photoUrls'] === undefined) return false;
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/es6-target/src/models/Tag.ts

@@ -36,7 +36,7 @@ export interface Tag {
 /**
  * Check if a given object implements the Tag interface.
  */
-export function instanceOfTag(value: object): boolean {
+export function instanceOfTag(value: object): value is Tag {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/es6-target/src/models/User.ts

@@ -72,7 +72,7 @@ export interface User {
 /**
  * Check if a given object implements the User interface.
  */
-export function instanceOfUser(value: object): boolean {
+export function instanceOfUser(value: object): value is User {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/multiple-parameters/models/Category.ts

@@ -36,7 +36,7 @@ export interface Category {
 /**
  * Check if a given object implements the Category interface.
  */
-export function instanceOfCategory(value: object): boolean {
+export function instanceOfCategory(value: object): value is Category {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/multiple-parameters/models/ModelApiResponse.ts

@@ -42,7 +42,7 @@ export interface ModelApiResponse {
 /**
  * Check if a given object implements the ModelApiResponse interface.
  */
-export function instanceOfModelApiResponse(value: object): boolean {
+export function instanceOfModelApiResponse(value: object): value is ModelApiResponse {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/multiple-parameters/models/Order.ts

@@ -72,7 +72,7 @@ export type OrderStatusEnum = typeof OrderStatusEnum[keyof typeof OrderStatusEnu
 /**
  * Check if a given object implements the Order interface.
  */
-export function instanceOfOrder(value: object): boolean {
+export function instanceOfOrder(value: object): value is Order {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/multiple-parameters/models/Pet.ts

@@ -85,9 +85,9 @@ export type PetStatusEnum = typeof PetStatusEnum[keyof typeof PetStatusEnum];
 /**
  * Check if a given object implements the Pet interface.
  */
-export function instanceOfPet(value: object): boolean {
-    if (!('name' in value)) return false;
-    if (!('photoUrls' in value)) return false;
+export function instanceOfPet(value: object): value is Pet {
+    if (!('name' in value) || value['name'] === undefined) return false;
+    if (!('photoUrls' in value) || value['photoUrls'] === undefined) return false;
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/multiple-parameters/models/Tag.ts

@@ -36,7 +36,7 @@ export interface Tag {
 /**
  * Check if a given object implements the Tag interface.
  */
-export function instanceOfTag(value: object): boolean {
+export function instanceOfTag(value: object): value is Tag {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/multiple-parameters/models/User.ts

@@ -72,7 +72,7 @@ export interface User {
 /**
  * Check if a given object implements the User interface.
  */
-export function instanceOfUser(value: object): boolean {
+export function instanceOfUser(value: object): value is User {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/prefix-parameter-interfaces/src/models/Category.ts

@@ -36,7 +36,7 @@ export interface Category {
 /**
  * Check if a given object implements the Category interface.
  */
-export function instanceOfCategory(value: object): boolean {
+export function instanceOfCategory(value: object): value is Category {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/prefix-parameter-interfaces/src/models/ModelApiResponse.ts

@@ -42,7 +42,7 @@ export interface ModelApiResponse {
 /**
  * Check if a given object implements the ModelApiResponse interface.
  */
-export function instanceOfModelApiResponse(value: object): boolean {
+export function instanceOfModelApiResponse(value: object): value is ModelApiResponse {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/prefix-parameter-interfaces/src/models/Order.ts

@@ -72,7 +72,7 @@ export type OrderStatusEnum = typeof OrderStatusEnum[keyof typeof OrderStatusEnu
 /**
  * Check if a given object implements the Order interface.
  */
-export function instanceOfOrder(value: object): boolean {
+export function instanceOfOrder(value: object): value is Order {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/prefix-parameter-interfaces/src/models/Pet.ts

@@ -85,9 +85,9 @@ export type PetStatusEnum = typeof PetStatusEnum[keyof typeof PetStatusEnum];
 /**
  * Check if a given object implements the Pet interface.
  */
-export function instanceOfPet(value: object): boolean {
-    if (!('name' in value)) return false;
-    if (!('photoUrls' in value)) return false;
+export function instanceOfPet(value: object): value is Pet {
+    if (!('name' in value) || value['name'] === undefined) return false;
+    if (!('photoUrls' in value) || value['photoUrls'] === undefined) return false;
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/prefix-parameter-interfaces/src/models/Tag.ts

@@ -36,7 +36,7 @@ export interface Tag {
 /**
  * Check if a given object implements the Tag interface.
  */
-export function instanceOfTag(value: object): boolean {
+export function instanceOfTag(value: object): value is Tag {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/prefix-parameter-interfaces/src/models/User.ts

@@ -72,7 +72,7 @@ export interface User {
 /**
  * Check if a given object implements the User interface.
  */
-export function instanceOfUser(value: object): boolean {
+export function instanceOfUser(value: object): value is User {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/sagas-and-records/src/models/Category.ts

@@ -36,7 +36,7 @@ export interface Category {
 /**
  * Check if a given object implements the Category interface.
  */
-export function instanceOfCategory(value: object): boolean {
+export function instanceOfCategory(value: object): value is Category {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/sagas-and-records/src/models/DefaultMetaOnlyResponse.ts

@@ -37,8 +37,8 @@ export interface DefaultMetaOnlyResponse {
 /**
  * Check if a given object implements the DefaultMetaOnlyResponse interface.
  */
-export function instanceOfDefaultMetaOnlyResponse(value: object): boolean {
-    if (!('meta' in value)) return false;
+export function instanceOfDefaultMetaOnlyResponse(value: object): value is DefaultMetaOnlyResponse {
+    if (!('meta' in value) || value['meta'] === undefined) return false;
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/sagas-and-records/src/models/FindPetsByStatusResponse.ts

@@ -49,8 +49,8 @@ export interface FindPetsByStatusResponse {
 /**
  * Check if a given object implements the FindPetsByStatusResponse interface.
  */
-export function instanceOfFindPetsByStatusResponse(value: object): boolean {
-    if (!('meta' in value)) return false;
+export function instanceOfFindPetsByStatusResponse(value: object): value is FindPetsByStatusResponse {
+    if (!('meta' in value) || value['meta'] === undefined) return false;
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/sagas-and-records/src/models/FindPetsByUserResponse.ts

@@ -49,8 +49,8 @@ export interface FindPetsByUserResponse {
 /**
  * Check if a given object implements the FindPetsByUserResponse interface.
  */
-export function instanceOfFindPetsByUserResponse(value: object): boolean {
-    if (!('meta' in value)) return false;
+export function instanceOfFindPetsByUserResponse(value: object): value is FindPetsByUserResponse {
+    if (!('meta' in value) || value['meta'] === undefined) return false;
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/sagas-and-records/src/models/GetBehaviorPermissionsResponse.ts

@@ -43,8 +43,8 @@ export interface GetBehaviorPermissionsResponse {
 /**
  * Check if a given object implements the GetBehaviorPermissionsResponse interface.
  */
-export function instanceOfGetBehaviorPermissionsResponse(value: object): boolean {
-    if (!('meta' in value)) return false;
+export function instanceOfGetBehaviorPermissionsResponse(value: object): value is GetBehaviorPermissionsResponse {
+    if (!('meta' in value) || value['meta'] === undefined) return false;
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/sagas-and-records/src/models/GetBehaviorTypeResponse.ts

@@ -49,8 +49,8 @@ export interface GetBehaviorTypeResponse {
 /**
  * Check if a given object implements the GetBehaviorTypeResponse interface.
  */
-export function instanceOfGetBehaviorTypeResponse(value: object): boolean {
-    if (!('meta' in value)) return false;
+export function instanceOfGetBehaviorTypeResponse(value: object): value is GetBehaviorTypeResponse {
+    if (!('meta' in value) || value['meta'] === undefined) return false;
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/sagas-and-records/src/models/GetMatchingPartsResponse.ts

@@ -49,8 +49,8 @@ export interface GetMatchingPartsResponse {
 /**
  * Check if a given object implements the GetMatchingPartsResponse interface.
  */
-export function instanceOfGetMatchingPartsResponse(value: object): boolean {
-    if (!('meta' in value)) return false;
+export function instanceOfGetMatchingPartsResponse(value: object): value is GetMatchingPartsResponse {
+    if (!('meta' in value) || value['meta'] === undefined) return false;
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/sagas-and-records/src/models/GetPetPartTypeResponse.ts

@@ -49,8 +49,8 @@ export interface GetPetPartTypeResponse {
 /**
  * Check if a given object implements the GetPetPartTypeResponse interface.
  */
-export function instanceOfGetPetPartTypeResponse(value: object): boolean {
-    if (!('meta' in value)) return false;
+export function instanceOfGetPetPartTypeResponse(value: object): value is GetPetPartTypeResponse {
+    if (!('meta' in value) || value['meta'] === undefined) return false;
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/sagas-and-records/src/models/ItemId.ts

@@ -36,9 +36,9 @@ export interface ItemId {
 /**
  * Check if a given object implements the ItemId interface.
  */
-export function instanceOfItemId(value: object): boolean {
-    if (!('id' in value)) return false;
-    if (!('type' in value)) return false;
+export function instanceOfItemId(value: object): value is ItemId {
+    if (!('id' in value) || value['id'] === undefined) return false;
+    if (!('type' in value) || value['type'] === undefined) return false;
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/sagas-and-records/src/models/MatchingParts.ts

@@ -43,9 +43,9 @@ export interface MatchingParts {
 /**
  * Check if a given object implements the MatchingParts interface.
  */
-export function instanceOfMatchingParts(value: object): boolean {
-    if (!('connected' in value)) return false;
-    if (!('related' in value)) return false;
+export function instanceOfMatchingParts(value: object): value is MatchingParts {
+    if (!('connected' in value) || value['connected'] === undefined) return false;
+    if (!('related' in value) || value['related'] === undefined) return false;
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/sagas-and-records/src/models/ModelApiResponse.ts

@@ -42,7 +42,7 @@ export interface ModelApiResponse {
 /**
  * Check if a given object implements the ModelApiResponse interface.
  */
-export function instanceOfModelApiResponse(value: object): boolean {
+export function instanceOfModelApiResponse(value: object): value is ModelApiResponse {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/sagas-and-records/src/models/ModelError.ts

@@ -55,8 +55,8 @@ export interface ModelError {
 /**
  * Check if a given object implements the ModelError interface.
  */
-export function instanceOfModelError(value: object): boolean {
-    if (!('type' in value)) return false;
+export function instanceOfModelError(value: object): value is ModelError {
+    if (!('type' in value) || value['type'] === undefined) return false;
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/sagas-and-records/src/models/Order.ts

@@ -72,7 +72,7 @@ export type OrderStatusEnum = typeof OrderStatusEnum[keyof typeof OrderStatusEnu
 /**
  * Check if a given object implements the Order interface.
  */
-export function instanceOfOrder(value: object): boolean {
+export function instanceOfOrder(value: object): value is Order {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/sagas-and-records/src/models/Part.ts

@@ -36,9 +36,9 @@ export interface Part {
 /**
  * Check if a given object implements the Part interface.
  */
-export function instanceOfPart(value: object): boolean {
-    if (!('id' in value)) return false;
-    if (!('name' in value)) return false;
+export function instanceOfPart(value: object): value is Part {
+    if (!('id' in value) || value['id'] === undefined) return false;
+    if (!('name' in value) || value['name'] === undefined) return false;
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/sagas-and-records/src/models/Pet.ts

@@ -187,21 +187,21 @@ export type PetStatusEnum = typeof PetStatusEnum[keyof typeof PetStatusEnum];
 /**
  * Check if a given object implements the Pet interface.
  */
-export function instanceOfPet(value: object): boolean {
-    if (!('id' in value)) return false;
-    if (!('otherFriendIds' in value)) return false;
-    if (!('friendAge' in value)) return false;
-    if (!('age' in value)) return false;
-    if (!('isHappy' in value)) return false;
-    if (!('isTall' in value)) return false;
-    if (!('category' in value)) return false;
-    if (!('name' in value)) return false;
-    if (!('photoUrls' in value)) return false;
-    if (!('warningStatus' in value)) return false;
-    if (!('alternateStatus' in value)) return false;
-    if (!('otherDepStatuses' in value)) return false;
-    if (!('tags' in value)) return false;
-    if (!('status' in value)) return false;
+export function instanceOfPet(value: object): value is Pet {
+    if (!('id' in value) || value['id'] === undefined) return false;
+    if (!('otherFriendIds' in value) || value['otherFriendIds'] === undefined) return false;
+    if (!('friendAge' in value) || value['friendAge'] === undefined) return false;
+    if (!('age' in value) || value['age'] === undefined) return false;
+    if (!('isHappy' in value) || value['isHappy'] === undefined) return false;
+    if (!('isTall' in value) || value['isTall'] === undefined) return false;
+    if (!('category' in value) || value['category'] === undefined) return false;
+    if (!('name' in value) || value['name'] === undefined) return false;
+    if (!('photoUrls' in value) || value['photoUrls'] === undefined) return false;
+    if (!('warningStatus' in value) || value['warningStatus'] === undefined) return false;
+    if (!('alternateStatus' in value) || value['alternateStatus'] === undefined) return false;
+    if (!('otherDepStatuses' in value) || value['otherDepStatuses'] === undefined) return false;
+    if (!('tags' in value) || value['tags'] === undefined) return false;
+    if (!('status' in value) || value['status'] === undefined) return false;
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/sagas-and-records/src/models/PetRegionsResponse.ts

@@ -43,8 +43,8 @@ export interface PetRegionsResponse {
 /**
  * Check if a given object implements the PetRegionsResponse interface.
  */
-export function instanceOfPetRegionsResponse(value: object): boolean {
-    if (!('meta' in value)) return false;
+export function instanceOfPetRegionsResponse(value: object): value is PetRegionsResponse {
+    if (!('meta' in value) || value['meta'] === undefined) return false;
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/sagas-and-records/src/models/ResponseMeta.ts

@@ -99,8 +99,8 @@ export type ResponseMetaCodeEnum = typeof ResponseMetaCodeEnum[keyof typeof Resp
 /**
  * Check if a given object implements the ResponseMeta interface.
  */
-export function instanceOfResponseMeta(value: object): boolean {
-    if (!('code' in value)) return false;
+export function instanceOfResponseMeta(value: object): value is ResponseMeta {
+    if (!('code' in value) || value['code'] === undefined) return false;
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/sagas-and-records/src/models/Tag.ts

@@ -36,7 +36,7 @@ export interface Tag {
 /**
  * Check if a given object implements the Tag interface.
  */
-export function instanceOfTag(value: object): boolean {
+export function instanceOfTag(value: object): value is Tag {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/sagas-and-records/src/models/User.ts

@@ -84,9 +84,9 @@ export interface User {
 /**
  * Check if a given object implements the User interface.
  */
-export function instanceOfUser(value: object): boolean {
-    if (!('id' in value)) return false;
-    if (!('subUser2' in value)) return false;
+export function instanceOfUser(value: object): value is User {
+    if (!('id' in value) || value['id'] === undefined) return false;
+    if (!('subUser2' in value) || value['subUser2'] === undefined) return false;
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/snakecase-discriminator/models/AdditionalPropertiesClass.ts

@@ -36,7 +36,7 @@ export interface AdditionalPropertiesClass {
 /**
  * Check if a given object implements the AdditionalPropertiesClass interface.
  */
-export function instanceOfAdditionalPropertiesClass(value: object): boolean {
+export function instanceOfAdditionalPropertiesClass(value: object): value is AdditionalPropertiesClass {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/snakecase-discriminator/models/AllOfWithSingleRef.ts

@@ -43,7 +43,7 @@ export interface AllOfWithSingleRef {
 /**
  * Check if a given object implements the AllOfWithSingleRef interface.
  */
-export function instanceOfAllOfWithSingleRef(value: object): boolean {
+export function instanceOfAllOfWithSingleRef(value: object): value is AllOfWithSingleRef {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/snakecase-discriminator/models/Animal.ts

@@ -38,8 +38,8 @@ export interface Animal {
 /**
  * Check if a given object implements the Animal interface.
  */
-export function instanceOfAnimal(value: object): boolean {
-    if (!('className' in value)) return false;
+export function instanceOfAnimal(value: object): value is Animal {
+    if (!('className' in value) || value['className'] === undefined) return false;
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/snakecase-discriminator/models/ArrayOfArrayOfNumberOnly.ts

@@ -30,7 +30,7 @@ export interface ArrayOfArrayOfNumberOnly {
 /**
  * Check if a given object implements the ArrayOfArrayOfNumberOnly interface.
  */
-export function instanceOfArrayOfArrayOfNumberOnly(value: object): boolean {
+export function instanceOfArrayOfArrayOfNumberOnly(value: object): value is ArrayOfArrayOfNumberOnly {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/snakecase-discriminator/models/ArrayOfNumberOnly.ts

@@ -30,7 +30,7 @@ export interface ArrayOfNumberOnly {
 /**
  * Check if a given object implements the ArrayOfNumberOnly interface.
  */
-export function instanceOfArrayOfNumberOnly(value: object): boolean {
+export function instanceOfArrayOfNumberOnly(value: object): value is ArrayOfNumberOnly {
     return true;
 }
 

samples/client/petstore/typescript-fetch/builds/snakecase-discriminator/models/ArrayTest.ts

@@ -49,7 +49,7 @@ export interface ArrayTest {
 /**
  * Check if a given object implements the ArrayTest interface.
  */
-export function instanceOfArrayTest(value: object): boolean {
+export function instanceOfArrayTest(value: object): value is ArrayTest {
     return true;
 }