improve jsonic

beautiful-racket/br/demo/jsonic-b.rkt

@@ -1,4 +0,0 @@
-#lang br/quicklang
-(module reader br/quicklang
-  (require (submod "jsonic-b/main.rkt" reader))
-  (provide (all-from-out (submod "jsonic-b/main.rkt" reader))))

beautiful-racket/br/demo/jsonic-b/expander.rkt

@@ -1,20 +0,0 @@
-#lang br/quicklang
-(require json)
-(define-macro (js-module-begin PARSE-TREE)
-  #'(#%module-begin
-     (define result-string PARSE-TREE)
-     (define validated-jsexpr (string->jsexpr result-string))
-     (display (jsexpr->string validated-jsexpr))))
-(provide (rename-out [js-module-begin #%module-begin]))
-
-(define-macro (jsonic-program S-EXP-OR-JSON-CHAR ...)
-  #'(string-trim (string-append S-EXP-OR-JSON-CHAR ...)))
-(provide jsonic-program)
-
-(define-macro (json-char CHAR-STR) #'CHAR-STR)
-(provide json-char)
-
-(define-macro (s-exp SEXP-STR)
-  (with-pattern ([SEXP-DATUM (format-datum '~a (syntax->datum #'SEXP-STR))])
-    #'(jsexpr->string SEXP-DATUM)))
-(provide s-exp)

beautiful-racket/br/demo/jsonic-b/jsonic-test.rkt

@@ -1,12 +0,0 @@
-#lang br/demo/jsonic-b
-// a line comment
-[
-  @$ 'null $@,
-  @$ #f $@,
-  @$ (* 6 7) $@,
-  @$ "string" $@,
-  @$ (list "array" "of" "strings") $@,
-  @$ (hash 'key-1 42
-          'key-2 "value"
-          'key-3 (hash 'subkey 21)) $@
-]

beautiful-racket/br/demo/jsonic-b/main.rkt

@@ -1,4 +0,0 @@
-#lang br/quicklang
-(module reader br
-  (require "reader.rkt")
-  (provide read-syntax))

beautiful-racket/br/demo/jsonic-b/parser.rkt

@@ -1,4 +0,0 @@
-#lang brag
-jsonic-program: (s-exp | json-char)*
-s-exp: SEXP-TOK
-json-char: CHAR-TOK

beautiful-racket/br/demo/jsonic-b/reader.rkt

@@ -1,8 +0,0 @@
-#lang br/quicklang
-(require "tokenizer.rkt" "parser.rkt")
-(define (read-syntax path port)
-  (define parse-tree (parse path (tokenize port)))
-  (define module-datum `(module jsonic-module br/demo/jsonic-b/expander
-                          ,parse-tree))
-  (datum->syntax #f module-datum))
-(provide read-syntax)

beautiful-racket/br/demo/jsonic-b/tokenizer.rkt

@@ -1,14 +0,0 @@
-#lang br/quicklang
-(require brag/lexer-support)
-(define (tokenize port)
-  (define (next-token)
-    (define our-lexer
-      (lexer
-       [(eof) eof]
-       [(delimited-by "//" "\n") (next-token)]
-       [(delimited-by "@$" "$@")
-        (token 'SEXP-TOK (trim-delimiters "@$" lexeme "$@"))]
-       [any-char (token 'CHAR-TOK lexeme)]))
-    (our-lexer port))  
-  next-token)
-(provide tokenize)

beautiful-racket/br/demo/jsonic/expander.rkt

@@ -3,35 +3,18 @@
 (define-macro (js-module-begin PARSE-TREE)
   #'(#%module-begin
      (define result-string PARSE-TREE)
-     (when (string->jsexpr result-string)
-       (display result-string))))
+     (define validated-jsexpr (string->jsexpr result-string))
+     (display (jsexpr->string validated-jsexpr))))
 (provide (rename-out [js-module-begin #%module-begin]))
 
 (define-macro (jsonic-program S-EXP-OR-JSON-CHAR ...)
-  #'(string-trim (string-append S-EXP-OR-JSON-CHAR ...)))
+  #'(string-append S-EXP-OR-JSON-CHAR ...))
 (provide jsonic-program)
 
-(define-macro (json-char TOKEN)
-  #'TOKEN)
+(define-macro (json-char CHAR-STR) #'CHAR-STR)
 (provide json-char)
 
-(define-macro (s-exp TOKEN ...)
-  (define token-stxs (syntax->list #'(TOKEN ...)))
-  (define token-strs (map syntax->datum token-stxs))
-  (define s-exp-str (apply string-append token-strs))
-  (with-pattern ([S-EXP-DATUM (format-datum '~a s-exp-str)])
-    #'(->json S-EXP-DATUM)))
+(define-macro (s-exp SEXP-STR)
+  (with-pattern ([SEXP-DATUM (format-datum '~a #'SEXP-STR)])
+    #'(jsexpr->string SEXP-DATUM)))
 (provide s-exp)
-
-(define (->json x)
-  (cond
-    [(number? x) (number->string x)]
-    [(string? x) (format "~v" x)]
-    [(list? x)
-     (format "[~a]" (string-join (map ->json x) ", "))]
-    [(hash? x)
-     (define pair-strs (for/list ([(k v) (in-hash x)])
-                             (format "~a: ~a"
-                                     (->json k) (->json v))))
-     (format "{~a}" (string-join pair-strs ", "))]
-    [else ""]))

beautiful-racket/br/demo/jsonic/jsonic-test.rkt

@@ -1,10 +1,13 @@
 #lang br/demo/jsonic
 // a line comment
 [
+    @$ 'null $@,
+    @$ #f $@,
+    @$ #t $@,
     @$ (* 6 7) $@,
     @$ "string" $@,
     @$ (list "array" "of" "strings") $@,
-  @$ (hash "key-1" 42
-          "key-2" "value"
-          "key-3" (hash "subkey" 21)) $@
+    @$ (hash 'key-1 42
+             'key-2 "value"
+             'key-3 (hash 'subkey 21)) $@
 ]

beautiful-racket/br/demo/jsonic/parser.rkt

@@ -1,4 +1,4 @@
 #lang brag
 jsonic-program: (s-exp | json-char)*
-s-exp: /OPEN CHAR* /CLOSE
-json-char: CHAR
+s-exp: SEXP-TOK
+json-char: CHAR-TOK

beautiful-racket/br/demo/jsonic/tokenizer.rkt

@@ -5,14 +5,10 @@
     (define our-lexer
       (lexer
        [(eof) eof]
-       [(:seq "//" (:* (char-complement "\n"))) (next-token)]
-       ["@$" (token 'OPEN)]
-       ["$@" (token 'CLOSE)]
-       [any-char (token 'CHAR lexeme)]))
+       [(delimited-by "//" "\n") (next-token)]
+       [(delimited-by "@$" "$@")
+        (token 'SEXP-TOK (trim-delimiters "@$" lexeme "$@"))]
+       [any-char (token 'CHAR-TOK lexeme)]))
     (our-lexer port))  
   next-token)
 (provide tokenize)
-
-
-;; (char-complement "\n") means any char but "\n"
-;; (complement "\n") means any whole string except "\n"