1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 | <!doctype html> <html> <head> <title>CodeMirror: Scheme mode</title> <link rel="stylesheet" href="../../lib/codemirror.css"> <script src="../../lib/codemirror.js"></script> <script src="scheme.js"></script> <style>.CodeMirror {background: #f8f8f8;}</style> <link rel="stylesheet" href="../../doc/docs.css"> </head> <body> <h1>CodeMirror: Scheme mode</h1> <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> </body> </html> |