[plt-scheme] scheme/signature and require

From: detmammut at googlemail.com (detmammut at googlemail.com)
Date: Mon Mar 23 18:55:15 EDT 2009

why does the following create an error?

---

#lang scheme/signature

(require scheme/base)

marshall-rest-args

equal?

car
cdr
cons
map
filter

---

source-lang-sig.ss:3:1: define-signature: not a signature form in:
require


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