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Article contents:== Outdated egg! This is an egg for CHICKEN 4, the unsupported old release. You're almost certainly looking for [[/eggref/5/iexpr|the CHICKEN 5 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-5.html|egg index]]. Otherwise, please consider porting this egg to the current version of CHICKEN. [[tags: eggs]] [[toc:]] == iexpr === Description The {{iexpr}} library contains a procedure for parsing of I-expressions as described in [[http://srfi.schemers.org/srfi-49/srfi-49.html|SRFI-49]]. === Library Procedures <procedure>(parse LOC STRING-OR-PORT) => TREE</procedure> Parses I-expression text and returns a tree object with the parsed content. {{LOC}} is a symbol that indicates the name of the current entity being parsed. It is used for error reporting. <procedure>(tree-empty? TREE) => BOOL</procedure> Returns {{#t}} is the given tree object is empty, {{#f}} otherwise. <procedure>(tree-level TREE) => INTEGER</procedure> Returns the indentation level of the text contained in the given tree node. <procedure>(tree-child TREE) => TREE</procedure> Returns the first child of the given tree node. <procedure>(tree-sibling TREE) => TREE</procedure> Returns the first sibling of the given tree node. <procedure>(tree->list TREE) => LIST</procedure> Converts the given tree to a list structure. === Requires * [[make]] * [[silex]] * [[lalr]] * [[datatype]] === Version History * 1.9 Added srfi-49 test case * 1.8 Allow line breaks as group separators * 1.6 Bug fixes, allow ; as comment character, additional tests * 1.5 Using make egg instead of setup-api for make macro * 1.2 Updated unit tests * 1.1 Various fixes to handle boundary cases: empty input stream, 1-character words and others * 1.0 Initial Release === License Copyright 2010-2012 Ivan Raikov and the Okinawa Institute of Science and Technology. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. A full copy of the GPL license can be found at <http://www.gnu.org/licenses/>. Description of your changes:

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