SRFI-55 provides require-extension
which is a portable
mechanism to load selected SRFI modules. This is implemented in the
Guile core, there’s no module needed to get SRFI-55 itself.
Require the features of clause1 clause2 … , throwing an error if any are unavailable.
A clause is of the form (identifier arg...)
. The
only identifier currently supported is srfi
and the
arguments are SRFI numbers. For example to get SRFI-1 and SRFI-6,
(require-extension (srfi 1 6))
require-extension
can only be used at the top-level.
A Guile-specific program can simply use-modules
to load SRFIs
not already in the core, require-extension
is for programs
designed to be portable to other Scheme implementations.