# SRFI 154: First-class dynamic extents

by Marc Nieper-Wißkirchen

status: final (2018-09-15)

keywords: Miscellaneous

Scheme has the notion of the dynamic extent of a procedure call. A number of standard Scheme procedures and syntaxes like dynamic-wind, call-with-current-continuation, and parameterize deal with the dynamic extent indirectly. The same holds true for the procedures and syntaxes dealing with continuation marks as defined by SRFI 157.