(require-extension autoload)
(autoload unit procedure-name ...)
such that the first time procedure-name is called, it will perform a
runtime require of 'unit and then apply the procedure from the newly
loaded unit to the args it was passed. Subsequent calls to
procedure-name will thereafter refer to the new procedure and will
thus not incur any overhead.
You may also specify an alias for the procedure, and a default procedure if the library can't be loaded:
(autoload unit (name alias default) ...)
In this case, although the procedure name from the unit is "name," the form defines the autoload procedure as "alias."
If the library can't be loaded then an error is signalled, unless default is given, in which case the values are passed to that.
;; load iconv procedures lazily
(autoload iconv iconv iconv-open)
;; load some sqlite procedures lazily with "-" names
(autoload sqlite (sqlite:open sqlite-open)
(sqlite:execute sqlite-execute))
;; load md5 library, falling back on slower scheme version
(autoload scheme-md5 (md5:digest scheme-md5:digest))
(autoload md5 (md5:digest #f scheme-md5:digest))
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