import { satisfiesConcept } from "../utils/concept"

export class ForwardIterator {
  move(rhs) {
    return this.copy(rhs)
  }

  get value() {
    return this.deref().value
  }

  set value(value) {
    return this.deref().value = value
  }

  neq(rhs) {
    return !this.eq(rhs)
  }
}

ForwardIterator.is = function (obj, ...args) {
  const pure_virtual = [
    'clone',
    'copy',
    'deref',
    'inc',
    'eq'
  ]
  const virtual = [
    'move',
    'value',
    'neq',
  ]
  return satisfiesConcept(obj, pure_virtual, virtual, ...args)
}