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Article contents:== Outdated egg!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/regex-case|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]] == regex-case [[toc:]] === Description An easy to use {{case}} construct for matching regular expressions. === Author [[/users/felix winkelmann|felix winkelmann]] === Requirements None === Download [[http://code.call-cc.org/legacy-eggs/3/regex-case.egg|regex-case.egg]] === Documentation <macro>(regex-case EXPRESSION CLAUSE ...)</macro> Evaluates {{EXPRESSION}} and executes the body of the first {{CLAUSE}} that matches. Each {{CLAUSE}} should be of the form: (REGEX LAMBDA-LIST BODY ...) The variables in {{LAMBDA-LIST}} are bound to the results of evaluating the expression (string-match REGEX STRING) The last {{CLAUSE}} may also be (else BODY ...) If no {{CLAUSE}} matches, the form returns an undefined result. === Examples <enscript highlight="scheme"> (use regex-case) (define (test x) (regex-case x ["[a-z]+" _ 'word] ["[0-9]+" _ 'num] [else 'nothing] ) ) (test "42") => 'num (test "hello") => 'word (test "???") => 'nothing </enscript> <enscript highlight="scheme"> (use regex-case) (regex-case "one23four" ["[a-z]+([0-9]+).*" (all num) num] ) => "23" </enscript> <enscript highlight="scheme"> (use regex-case) (regex-case "http:www.foo.com/index.html" ["([a-z]+):([a-z0-9.-]+)(/(.*))?" (_ . parts) parts]) => ("http" "www.foo.com" "/index.html" "index.html") </enscript> === Changelog * 1.1 Adapted to new setup scheme. * 1.0 Initial release === License Copyright (c) 2003, 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. Description of your changes:

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