29.4 library and repl

It is possible to implement a "read-eval-print-loop" that is extended with the facilities implemented inside a library. In order to make the variables, functions, and classes of a library visible from the interpreter, the eval library module clause has to be used. (see section Module declaration) For instance, here is a module that implements a "repl" with the format facility available:

(module format-repl
   (eval (library bformat))
   (library bformat))

;; a dummy reference to a facility of the format library
(let ((dummy format))
   (repl))

Alternatively, libraries can be explicitly loaded using the library-load function such as:

(module format-repl)

;; a dummy reference to a facility of the format library
(let ((dummy format))
   (eval '(library-load bformat))
   (repl))

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