allow keyword arguments to have quotes (closes #39)

quad/qtest/fark.rkt

@@ -1,11 +1,11 @@
 #lang quadwriter/markdown
 
-#:page-size A3
-#:page-orientation wide
+#:page-size "A3"
+#:page-orientation "wide"
 #:column-count 3
 #:column-gap 24
-#:line-align justify
-#:line-wrap best
+#:line-align "justify"
+#:line-wrap "best"
 #:page-margin-left 200
 #:page-margin-right 100
 

quad/quad/scribblings/quad.scrbl

@@ -292,16 +292,16 @@ Even if you're using a @racketmodname[quadwriter] dialect, you can still set top
 @codeblock|{
 #lang quadwriter/markdown
 
-#:page-size tabloid
-#:page-orientation wide
+#:page-size "tabloid"
+#:page-orientation "wide"
 #:font-size 18
-#:font-color red
+#:font-color "red"
 
 Brennan and Dale like fancy sauce.
 }|
 ]
 
-Any of the @secref{Markup} attributes documented below can be used as keyword arguments. The syntax follows the pattern above: one attribute + value pair per line, with the attribute prefixed with @litchar{#:} to make it a keyword, and the value unquoted. 
+Any of the @secref{Markup} attributes documented below can be used as keyword arguments. The syntax follows the pattern above: one attribute + value pair per line, with the attribute prefixed with @litchar{#:} to make it a keyword, followed by the value.
 
 This keyword syntax works in the @racketmodname[quadwriter], @racketmodname[quadwriter/markdown], and @racketmodname[quadwriter/markup] languages. The idea is to make it easy to adjust the default layout behavior without going outside the source file.
 

quad/quadwriter/lang-helper.rkt

@@ -1,6 +1,7 @@
 #lang debug racket/base
 (require (for-syntax racket/base)
          racket/match
+         racket/dict
          pollen/tag
          racket/system
          racket/class
@@ -19,20 +20,20 @@
 (define ((make-read-syntax expander-mod pt-proc) path-string p)
   ;; peel off any lines of format #:keyword val (bounded by newline)
   ;; and turn them into qexpr attrs
-  (define kw-val-pat #px"^(#:\\S+)\\s+([\\w ]*)\n")
   (define kw-attrs
-    (let loop ([acc null])
+    (let loop ([kw-val-pairs null])
       (cond
-        [(regexp-try-match #px"^\\s+" p) (loop acc)]
-        [(regexp-try-match kw-val-pat p)
-         =>
-         (λ (m)
-           (match m
-             [(list _ kw val) (loop (cons (list kw val) acc))]))]
+        [(regexp-try-match #px"^\\s+" p) (loop kw-val-pairs)]
+        [(equal? (peek-bytes 2 0 p) #"#:") ; discovered a keyword
+         (parameterize ([current-input-port (open-input-string (read-line p))])
+           (match (list (read) (read))
+             [(list (? keyword? kw) val) #:when (not (eof-object? val))
+                                         (loop (cons (cons kw val) kw-val-pairs))]
+             [_ (loop kw-val-pairs)]))]
         ;; reverse in case of multiple values with same keyword, latest takes precedence (by becoming first)
-        [else (reverse (for/list ([item (in-list acc)])
-                                 (match-define (list kw val) (map bytes->string/utf-8 item))
-                                 (list (string->symbol (string-trim kw "#:")) val)))])))
+        [else (reverse (for/list ([(kw val) (in-dict kw-val-pairs)])
+                                 (list (string->symbol (string-trim (keyword->string kw) "#:"))
+                                       (format "~a" val))))])))
   (strip-context
    (with-syntax ([PATH-STRING path-string]
                  [((ATTR-NAME ATTR-VAL) ...) kw-attrs]