Several special forms have been introduced to support some of the Scheme Requests for Implementation (SRFI). Note that MIT/GNU Scheme has for some time supported SRFI 23 (error-reporting mechanism) and SRFI 30 (nested multi-line comments), since these SRFIs reflect existing practice rather than introducing new functionality.
|• cond-expand (SRFI 0)|
|• receive (SRFI 8)|
|• and-let* (SRFI 2)|
|• define-record-type (SRFI 9)|