syntax error in generated code of cpprest client---> (public null<classname>)

Description

Got compilation error while compiling cpprest client code.

error: expected template-name before '<' token public null<ActionToBeSetup>

error: expected template-name before '<' token public null<SubscriptionDetail>

Swagger-codegen version

I used https://editor.swagger.io/ to generate the cpprest client code.
In open API specs i used version as swagger: '2.0'

Swagger declaration file content or url

swagger: '2.0'
info:
description: This is the initial REST API for RIC subscription
version: 0.0.4
title: RIC subscription
license:
name: Apache 2.0
url: 'http://www.apache.org/licenses/LICENSE-2.0.html'
host: hostname
basePath: /ric/v1
schemes:

• http
  paths:
  /config:
  get:
  summary: Returns the configuration of all xapps
  tags:
  - xapp
  operationId: getXappConfigList
  produces:
  - application/json
  - application/xml
  responses:
  '200':
  description: successful query of xApp config
  schema:
  $ref: '#/definitions/XappConfigList'
  '500':
  description: Internal error
  /subscriptions:
  get:
  summary: Returns list of subscriptions
  tags:
  - common
  operationId: getAllSubscriptions
  produces:
  - application/json
  responses:
  '200':
  description: successful query of subscriptions
  schema:
  $ref: '#/definitions/SubscriptionList'
  '500':
  description: Internal error
  post:
  tags:
  - common
  operationId: Subscribe
  summary: Subscribe a list of X2AP event triggers to receive messages sent by RAN
  consumes:
  - application/json
  produces:
  - application/json
  parameters:
  - name: SubscriptionParams
  in: body
  description: Subscription parameters
  schema:
  $ref: '#/definitions/SubscriptionParams'
  responses:
  '201':
  description: Subscription successfully created
  schema:
  $ref: '#/definitions/SubscriptionResponse'
  '400':
  description: Not Found
  '404':
  description: Invalid input
  '500':
  description: Internal error
  '503':
  description: Service Unavailable
  '/subscriptions/{subscriptionId}':
  delete:
  tags:
  - common
  summary: Unsubscribe X2AP events from Subscription Manager
  operationId: Unsubscribe
  consumes:
  - application/json
  produces:
  - application/json
  parameters:
  - name: subscriptionId
  in: path
  description: The subscriptionId received in the Subscription Response
  required: true
  type: string
  responses:
  '204':
  description: Operation done successfully
  '400':
  description: Invalid subscriptionId supplied
  '500':
  description: Internal error
  definitions:
  ConfigMetadata:
  type: object
  required:
  • xappName
  • configType
    properties:
    xappName:
    type: string
    description: Name of the xApp
    configType:
    type: string
    description: The type of the content
    enum:
    • json
    • xml
    • other
      XAppConfig:
      type: object
      required:
  • metadata
  • config
    properties:
    metadata:
    $ref: '#/definitions/ConfigMetadata'
    config:
    type: object
    description: Configuration in JSON format
    XappConfigList:
    type: array
    items:
    $ref: '#/definitions/XAppConfig'
    ActionDefinition:
    type: array
    description: E2SM byte array. ActionDefinition is an OPTIONAL IE
    items:
    type: integer
    SubsequentAction:
    description: SubsequentAction is an OPTIONAL IE
    type: object
    required:
  • SubsequentActionType
  • TimeToWait
    properties:
    SubsequentActionType:
    type: string
    enum:
    • continue
    • wait
      TimeToWait:
      type: string
      enum:
    • zero
    • w1ms
    • w2ms
    • w5ms
    • w10ms
    • w20ms
    • w30ms
    • w40ms
    • w50ms
    • w100ms
    • w200ms
    • w500ms
    • w1s
    • w2s
    • w5s
    • w10s
    • w20s
    • w60s
      ActionToBeSetup:
      type: object
      required:
  • ActionID
  • ActionType
    properties:
    ActionID:
    type: integer
    minimum: 0
    maximum: 255
    ActionType:
    type: string
    enum:
    • insert
    • policy
    • report
      ActionDefinition:
      $ref: '#/definitions/ActionDefinition'
      SubsequentAction:
      $ref: '#/definitions/SubsequentAction'
      ActionsToBeSetup:
      type: array
      items:
      $ref: '#/definitions/ActionToBeSetup'
      EventTriggerDefinition:
      type: array
      description: E2SM byte array
      items:
      type: integer
      SubscriptionDetail:
      type: object
      required:
  • XappEventInstanceId
  • EventTriggers
  • ActionToBeSetupList
    properties:
    XappEventInstanceId:
    type: integer
    minimum: 0
    maximum: 65535
    EventTriggers:
    $ref: '#/definitions/EventTriggerDefinition'
    ActionToBeSetupList:
    $ref: '#/definitions/ActionsToBeSetup'
    SubscriptionDetailsList:
    type: array
    items:
    $ref: '#/definitions/SubscriptionDetail'
    SubscriptionParams:
    type: object
    required:
  • ClientEndpoint
  • Meid
  • RANFunctionID
  • SubscriptionDetails
    properties:
    SubscriptionId:
    type: string
    description: Optional subscription ID (Submgr allocates if not given)
    ClientEndpoint:
    type: object
    description: xApp service address and port
    properties:
    Host:
    description: >-
    xApp service address name like
    'service-ricxapp-xappname-http.ricxapp'
    type: string
    HTTPPort:
    description: xApp HTTP service address port
    type: integer
    minimum: 0
    maximum: 65535
    RMRPort:
    description: xApp RMR service address port
    type: integer
    minimum: 0
    maximum: 65535
    Meid:
    type: string
    RANFunctionID:
    type: integer
    minimum: 0
    maximum: 4095
    E2SubscriptionDirectives:
    description: Optional. If not set Submgr uses its default values
    type: object
    properties:
    E2TimeoutTimerValue:
    description: How long time response is waited from E2 node
    type: integer
    minimum: 1
    maximum: 10
    E2RetryCount:
    description: How many times E2 subscription request is retried
    type: integer
    minimum: 0
    maximum: 10
    RMRRoutingNeeded:
    description: Subscription needs RMR route from E2Term to xApp
    type: boolean
    SubscriptionDetails:
    $ref: '#/definitions/SubscriptionDetailsList'
    SubscriptionResponse:
    type: object
    required:
  • SubscriptionId
  • SubscriptionInstances
    properties:
    SubscriptionId:
    type: string
    SubscriptionInstances:
    type: array
    items:
    $ref: '#/definitions/SubscriptionInstance'
    SubscriptionInstance:
    type: object
    required:
  • XappEventInstanceId
  • E2EventInstanceId
    properties:
    XappEventInstanceId:
    type: integer
    minimum: 0
    maximum: 65535
    E2EventInstanceId:
    type: integer
    minimum: 0
    maximum: 65535
    ErrorCause:
    description: Descriptive error cause. Empty string when no error.
    type: string
    ErrorSource:
    description: Source of error cause.
    type: string
    enum: [SUBMGR, RTMGR, DBAAS, ASN1, E2Node]
    TimeoutType:
    description: Type timeout. xApp should retry if timeout occurs.
    type: string
    enum: [E2-Timeout, RTMGR-Timeout, DBAAS-Timeout]
    SubscriptionData:
    type: object
    properties:
    SubscriptionId:
    type: integer
    Meid:
    type: string
    ClientEndpoint:
    type: array
    items:
    type: string
    SubscriptionInstances:
    type: array
    items:
    $ref: '#/definitions/SubscriptionInstance'
    SubscriptionList:
    type: array
    description: A list of subscriptions
    items:
    $ref: '#/definitions/SubscriptionData'

Start by reproducing the generation in editor.swagger.io with the supplied Swagger 2.0 declaration, then inspect the generated cpprest client around the reported public null<ActionToBeSetup> and public null<SubscriptionDetail> output. Done means the generated client compiles without those syntax errors for this declaration.