6 Modules
AllApplicationManualNameSummaryHelp

  • Documentation
    • Reference manual
      • Modules
        • Why Use Modules?
        • Defining a Module
        • Importing Predicates into a Module
        • Controlled autoloading for modules
        • Defining a meta-predicate
        • Overruling Module Boundaries
        • Interacting with modules from the top level
        • Composing modules from other modules
          • reexport/1
          • reexport/2
        • Operators and modules
        • Dynamic importing using import modules
        • Reserved Modules and using theā€˜user' module
        • An alternative import/export interface
        • Dynamic Modules
        • Transparent predicates: definition and context module
        • Module properties
        • Compatibility of the Module System
    • Packages

6.8 Composing modules from other modules

The predicates in this section are intended to create new modules from the content of other modules. Below is an example to define a composite module. The example exports all public predicates of module_1, module_2 and module_3, pred/1 from module_4, all predicates from module_5 except do_not_use/1 and all predicates from module_6 while renaming pred/1 into mypred/1.

:- module(my_composite, []).
:- reexport([ module_1,
              module_2,
              module_3
            ]).
:- reexport(module_4, [ pred/1 ]).
:- reexport(module_5, except([do_not_use/1])).
:- reexport(module_6, except([pred/1 as mypred])).
reexport(+Files)
Load and import predicates as use_module/1 and re-export all imported predicates. The reexport declarations must immediately follow the module declaration.
reexport(+File, +Import)
Import from File as use_module/2 and re-export the imported predicates. The reexport declarations must immediately follow the module declaration.