(aws-apigateway): TS compilation error when exactOptionalPropertyTypes set true

[victorsmirnov]

General Issue

TypeScript compilation fails when exactOptionalPropertyTypes is set to true

The Question

Compilation fails when exactOptionalPropertyTypes is set to true.

Several other modules also have the same error.

> tsc

node_modules/aws-cdk-lib/aws-apigateway/lib/restapi.d.ts:226:31 - error TS2420: Class 'RestApiBase' incorrectly implements interface 'IRestApi'.
  Types of property 'latestDeployment' are incompatible.
    Type 'Deployment | undefined' is not assignable to type 'Deployment'.
      Type 'undefined' is not assignable to type 'Deployment'.

226 export declare abstract class RestApiBase extends Resource implements IRestApi {
                                  ~~~~~~~~~~~

CDK CLI Version

2.13.0

Framework Version

2.13.0

Node.js Version

16.12.0

OS

macOS Big Sur

Language

Typescript

Language Version

TypeScript (4.5.5)

Other information

Most likely, replacing readonly latestDeployment?: Deployment; with readonly latestDeployment: Deployment | undefined; should fix the issue. I can try this as my first issue in the project. Please let me know if I should make a pull request.

[longtv2222]

Can confirm that I'm facing the same issue here, please refer https://devblogs.microsoft.com/typescript/announcing-typescript-4-4/#exact-optional-property-types to know why this is an issue.

[mpellegrini]

Hello, wondering if there is any updates on this issue. My current work around is to explicity cast the concrete class as the specific interface - vpc as IVpc or table as ITable. But for anyone using a later version of Typescript with a default config will be hitting this issue.