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(librep.info)Module Interfaces

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Module Interfaces
-----------------

   Each module implements an interface--the set of bindings (i.e.
functions, macros or variables) that it exports to other modules.
Interfaces may either be defined and then referenced by name, written
literally, or combined from a number of sources.

   The syntax of interface definitions is as follows:

     INTERFACE -> (export ID ...)
               |  NAME
               |  (compound-interface INTERFACE ...)
               |  (structure-interface MODULE-NAME)

where each ID is the name of a binding to export, and each NAME is the
name of an interface previously defined using `define-interface'.

 - Macro: define-interface name interface
     Associate the symbol NAME with the module interface INTERFACE
     (using one of the forms listed above.

   Here is an example defining an interface called `foo':

     (define-interface foo (compound-interface bar (export baz quux)))

It includes the interface called `bar' and adds two extra exported
symbols: `baz' and `quux'.