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copied!<p>How's this (in Scheme [Dr. Racket]):</p> <pre><code>(define (as-string elm) (cond ((string? elm) (string-append "\\\"" elm "\\\"")) ((number? elm) (number->string elm)) ((symbol? elm) (symbol->string elm)) ((null? elm) "*empty-list*") (else (error "Unrecognized type")))) (define (node-name-label names labels) (apply append (map (lambda (a b) (if (list? a) (node-name-label a b) (list (cons a b)))) names labels))) (define (node-txt names labels) (apply string-append (map (lambda (x) (let ((name (car x)) (label (cdr x))) (string-append name " [label=\"" (as-string label) "\"];\n"))) (node-name-label names labels)))) (define (graph-txt lst) (apply string-append (map (lambda (x) (let ((a (car x)) (b (cdr x))) (string-append a " -- " b ";\n"))) (get-relationships lst)))) (define (declare-nodes lst (basename "node")) (map (lambda (x n) (if (and (list? x) (not (empty? x))) (declare-nodes x (string-append basename "_" (number->string n))) (string-append basename "_" (number->string n)))) lst (range 0 (length lst)))) (define (get-relationships lst) (if (< (length lst) 2) null (apply append (map (lambda (x) (if (list? x) (cons (cons (car lst) (car x)) (get-relationships x)) (list (cons (car lst) x)))) (cdr lst))))) (define (range start end) (if (>= start end) '() (cons start (range (+ 1 start) end)))) (define (get-graph code graph-title) (let ((names (declare-nodes code))) (string-append "graph " graph-title " {\n" (node-txt names code) "\n" (graph-txt names) "}"))) </code></pre> <p>Usage: <code>(display (get-graph '(+ 2 (f1 (f2 () y) (f2 x y))) "simple_graph"))</code> produces:</p> <pre><code>graph simple_graph { node_0 [label="+"]; node_1 [label="2"]; node_2_0 [label="f1"]; node_2_1_0 [label="f2"]; node_2_1_1 [label="*empty-list*"]; node_2_1_2 [label="y"]; node_2_2_0 [label="f2"]; node_2_2_1 [label="x"]; node_2_2_2 [label="y"]; node_0 -- node_1; node_0 -- node_2_0; node_2_0 -- node_2_1_0; node_2_1_0 -- node_2_1_1; node_2_1_0 -- node_2_1_2; node_2_0 -- node_2_2_0; node_2_2_0 -- node_2_2_1; node_2_2_0 -- node_2_2_2; } </code></pre>

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