utils: Add dotit.

scribblings/utils.scrbl

@@ -1,6 +1,8 @@
 #lang scribble/manual
 @(require scribble/example racket/sandbox
-	  (for-label typed/racket/base graph (submod "../utils.rkt" typed)))
+	  (for-label typed/racket/base graph
+	  	     (submod "../utils.rkt" typed)
+		     (only-in typed/graph Graph)))
 
 @title[#:tag "utils"]{dds/utils: Various Utilities}
 
@@ -217,6 +219,14 @@ produces from tables.
 ]}
 
 @section{Additional graph utilities}
+@defproc[(dotit [graph Graph]) Void]{
+
+Typeset the graph via graphviz and display it.
+
+@examples[#:eval utils-evaluator
+(require typed/graph)
+(dotit (weighted-graph/directed '((1 a b) (2 b c))))
+]}
 
 @section{Pretty printing}
 

utils.rkt

@@ -20,7 +20,7 @@
    eval-with eval1-with auto-hash-ref/explicit auto-hash-ref/:
    extract-symbols any->string stringify-variable-mapping string->any
    handle-org-booleans map-sexp read-org-sexp unorg unstringify-pairs
-   read-org-variable-mapping unorgv)
+   read-org-variable-mapping unorgv dotit)
 
   (define-type Variable Symbol)
   (define-type (VariableMapping A) (Immutable-HashTable Variable A))
@@ -249,20 +249,21 @@
       (check-equal? (hash-ref m1 'b) '(or b (not a)))
       (check-equal? (hash-ref m2 'b) '(or b (not a)))
       (check-equal? (hash-ref m3 'b) '(or b (not a)))))
+
+  (define dotit (compose display graphviz))
   )
 
 (require 'typed)
 (provide eval-with eval1-with auto-hash-ref/explicit auto-hash-ref/:
          extract-symbols any->string stringify-variable-mapping string->any
          map-sexp read-org-sexp unorg unstringify-pairs
-         read-org-variable-mapping unorgv)
+         read-org-variable-mapping unorgv dotit)
 
 ;;; Untyped section.
 
 (provide
  ;; Functions
- (contract-out [dotit (-> graph? void?)]
-               [read-symbol-list (-> string? (listof symbol?))]
+ (contract-out [read-symbol-list (-> string? (listof symbol?))]
                [drop-first-last (-> string? string?)]
                [list-sets->list-strings (-> (listof (set/c any/c)) (listof string?))]
                [pretty-print-set-sets (-> (set/c (set/c symbol?) #:kind 'dont-care) string?)]
@@ -309,9 +310,6 @@
   (or/c (list/c key-contract val-contract)
         (cons/c key-contract val-contract)))
 
-;;; Typeset the graph via graphviz and display it.
-(define dotit (compose display graphviz))
-
 ;;; Reads a list of symbols from a string.
 (define (read-symbol-list str)
   (string->any (string-append "(" str ")")))