#lang racket/base (#%require version-case (for-syntax (only racket/base version) (only racket/base #%app #%datum)) stxparse-info/my-include) (version-case [(version< (version) "7.3.0.1") (my-include "contract.rkt-7-0-0-20")] [else (my-include "contract.rkt-7-3-0-1")])