gistfile1.txt

variable "topics" {
  default = ["new_users", "deleted_users"]
}

variable "environments" {
  default = ["prod", "staging", "testing", "development]
}

for $topic in topics {
  # Define SNS topics which are shared between all environments
  resource "aws_sns_topic" "$topic.$env" { ... }

  for $env in environments {
    # Then for each topic define a queue for each env
    resource "aws_sqs_queue" "$topic.$env-processors" { ... }

    # And bind the created queue to its sns topic
    resource "aws_sns_topic_subscription" "$topic.$env-to-$topic.$env-processors" {
      topic_arn = "${aws_sns_topic.${topic.$env}.arn}"
      endpoint = "${aws_sqs_queue.{$topic.$env-processors}.arn}"
    }
  }
}