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<title>CodeMirror: Scheme mode</title><meta charset="utf-8"/><link rel=stylesheet href="../../doc/docs.css">
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<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>
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