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Article contents:== Outdated egg! This is an egg for CHICKEN 3, the unsupported old release. You're almost certainly looking for [[/eggref/4/modules|the CHICKEN 4 version of this egg]], if it exists. If it does not exist, there may be equivalent functionality provided by another egg; have a look at the [[https://wiki.call-cc.org/chicken-projects/egg-index-4.html|egg index]]. Otherwise, please consider porting this egg to the current version of CHICKEN. [[tags: egg]] [[toc:]] == modules A simple module system for use with the low-level ({{define-macro}}) and [[syntactic-closures]] macro systems. Import and export of macros is not allowed. In combination with the {{-emit-exports}} compiler option, this module system provides some minimal interoperability with the (much more powerful) module system provided by the [[http://code.call-cc.org/legacy-eggs/3/syntax-case.html|syntax-case]] extension. When used with the [[http://code.call-cc.org/legacy-eggs/3/syntax-case.html|syntax-case]] macro system, this extension does nothing. Mote that any alternative macro expander ([[syntactic-closures]], for example) must be loaded/required prior to using this extension, as it must be aware of the expander used. === module [syntax] (module [NAME] (EXPORT ...) BODY ...) Defines a named or anonymous module. The {{EXPORT}}s should be identifiers and name bindings exported by this module. The bindings must be defined (using {{define}}) in {{BODY}}, either at it's toplevel or nested in {{begin}} forms. If an exported binding is not defined, an error will be signalled. All other toplevel bindings defined in BODY will be hidden and not be accessible from outside of this module. Definitions recognized are any of the following: (define ID VAL) (define (ID . LLIST) BODY ...) (define* (ID . LLIST) BODY ...) (define (... (ID . LLIST) ...) BODY ...) ; "curried" define (define* (... (ID . LLIST) ...) BODY ...) ; "curried" define (define-values (ID ...) VAL) (include FILENAME) ; recursively expands body (cond-expand CLAUSE ...) === import [syntax] (import NAME) Imports exported bindings from the module with the name {{NAME}}. If a module with the required name was previously defined, then all the following expressions may access the imported bindings. If no module is known under this name, then an installed extension will be searched that exports identifiers that are qualified with {{NAME}}. If no such extension can be found, then a file named {{NAME.exports}} will be searched in the current include-path and qualified identifiers from it will be extracted. If neither an installed extension nor an {{.exports}} file lists any qualified export, then an error will be signalled. If used inside a {{module}} form, then the imported bindings will only be accessible inside the lexical scope of the module. If used outside of a {{module}} form, then the values of imported bindings will be assigned to toplevel variables of the same name, overwriting any existing bindings. === import* [syntax] (import* NAME IMP ...) Imports selective with optional renaming. Only the identifiers given in {{IMP ...}} will be imported from the module {{NAME}}, where {{IMP}} may be either an identifier or a list of the form {{(NEW OLD)}}. === export-toplevel [syntax] (export-toplevel IDENTIFIER ...) Exports the values given by the (possibly non-exported) module bindings {{IDENTIFIER ...}} as toplevel variables of the same name. {{IDENTIFIER}} may also be of the form {{(IDENTIFIER EXPORT)}}, which exports the module binding {{IDENTIFIER}} as toplevel variable {{EXPORT}}. == Authors [[/users/felix winkelmann|felix winkelmann]] == Requirements [[codewalk]] [[http://code.call-cc.org/legacy-eggs/3/miscmacros.html|miscmacros]] == License Copyright (c) 2006-2007, Felix L. Winkelmann All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. Neither the name of the author nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. == Version History ; 0.91 : added support for modules with empty export lists ; 0.9 : {{begin}} bodies missed initial {{begin}} during pre-expansion ; 0.8 : fixed buggy handling of {{include}} ; 0.7 : added srfi-89 support ; 0.6 : supports curried {{define}} syntax ; 0.5 : added support for [[syntactic-closures]] ; 0.4 : added {{import*}} ; 0.3 : added codewalk requirement to meta file ; 0.2 : {{import}} is now also allowed outside of {{module}} form ; 0.1 : initial release Description of your changes:

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