racket/doc/release-notes/redex
Robby Findler 06696d67b4 add a #:pre keyword to define-metafunction
The keyword allows the specification of contracts
that relate different arguments

closes PR 13617
2013-03-18 12:54:27 -05:00
..
HISTORY.txt add a #:pre keyword to define-metafunction 2013-03-18 12:54:27 -05:00