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<!doctype html> <title>CodeMirror: Scheme mode</title> <meta charset="utf-8"/> <link rel=stylesheet href="../../doc/docs.css"> <link rel="stylesheet" href="../../lib/codemirror.css"> <script src="../../lib/codemirror.js"></script> <script src="scheme.js"></script> <style>.CodeMirror {background: #f8f8f8;}</style> <div id=nav> <a href="http://codemirror.net"><h1>CodeMirror</h1><img id=logo src="../../doc/logo.png"></a> <ul> <li><a href="../../index.html">Home</a> <li><a href="../../doc/manual.html">Manual</a> <li><a href="https://github.com/codemirror/codemirror">Code</a> </ul> <ul> <li><a href="../index.html">Language modes</a> <li><a class=active href="#">Scheme</a> </ul> </div> <article> <h2>Scheme mode</h2> <form><textarea id="code" name="code"> ; See if the input starts with a given symbol. (define (match-symbol input pattern) (cond ((null? (remain input)) #f) ((eqv? (car (remain input)) pattern) (r-cdr input)) (else #f))) ; Allow the input to start with one of a list of patterns. (define (match-or input pattern) (cond ((null? pattern) #f) ((match-pattern input (car pattern))) (else (match-or input (cdr pattern))))) ; Allow a sequence of patterns. (define (match-seq input pattern) (if (null? pattern) input (let ((match (match-pattern input (car pattern)))) (if match (match-seq match (cdr pattern)) #f)))) ; Match with the pattern but no problem if it does not match. (define (match-opt input pattern) (let ((match (match-pattern input (car pattern)))) (if match match input))) ; Match anything (other than '()), until pattern is found. The rather ; clumsy form of requiring an ending pattern is needed to decide where ; the end of the match is. If none is given, this will match the rest ; of the sentence. (define (match-any input pattern) (cond ((null? (remain input)) #f) ((null? pattern) (f-cons (remain input) (clear-remain input))) (else (let ((accum-any (collector))) (define (match-pattern-any input pattern) (cond ((null? (remain input)) #f) (else (accum-any (car (remain input))) (cond ((match-pattern (r-cdr input) pattern)) (else (match-pattern-any (r-cdr input) pattern)))))) (let ((retval (match-pattern-any input (car pattern)))) (if retval (f-cons (accum-any) retval) #f)))))) </textarea></form> <script> var editor = CodeMirror.fromTextArea(document.getElementById("code"), {}); </script> <p><strong>MIME types defined:</strong> <code>text/x-scheme</code>.</p> </article>
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