Final SRFI 154: First-class dynamic extents Arthur A. Gleckler 15 Sep 2018 23:04 UTC
Scheme Request for Implementation 154,
"First-class dynamic extents,"
by Marc Nieper-Wißkirchen,
has gone into "final" status.
The document and an archive of the discussion are available at
Here's the abstract:
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.
This SRFI reifies the dynamic extent into a first-class value
together with a well-defined procedural interface and a syntax
to create procedures that remember not only their environment at
creation time but also their dynamic extent, which includes
their dynamic environment.
Many thanks to the author and to everyone who contributed to the
discussion of this SRFI.