Swift4 in Xcode9-beta Error

[Jiar]

Protocol 'GraphQLQuery' can only be used as a generic constraint because it has Self or associated type requirements

apolloStore.swift

func rootKey<Operation: GraphQLOperation>(forOperation operation: Operation) -> CacheKey {
  switch operation {
  case is GraphQLQuery:   // Error
    return "QUERY_ROOT"
  case is GraphQLMutation:   // Error
    return "MUTATION_ROOT"
  default:
    preconditionFailure("Unknown operation type")
  }
}

[martijnwalraven]

We don't yet support Swift 4. I did try running the tests on Xcode 9 in Swift 3 mode, and that seems to work, so I suggest you stick to that for now.

[thinkOfWord]

什么时候支持swift4