Initial commit

node_modules/jsonic/jsonic-parser.pegjs

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+
+
+/* JSON parser based on the grammar described at http://json.org/. */
+
+{
+  /*
+   * We can't return |null| in the |value| rule because that would mean parse
+   * failure. So we return a special object instead and convert it to |null|
+   * later.
+   */
+
+  var null_ = new Object;
+
+  function fixNull(value) {
+    return value === null_ ? null : value;
+  }
+}
+
+/* ===== Syntactical Elements ===== */
+
+start
+  = _ object:object { return object; }
+  / _ array:array   { return array; }
+
+object
+  = "{" _ "}" _                 { return {};      }
+  / "{" _ members:members "}" _ { return members; }
+
+members
+  = ","? head:pair? tail:("," _ pair)* ","? _ {
+      var result = {};
+      if( head ) { result[head[0]] = fixNull(head[1]); }
+      for (var i = 0; i < tail.length; i++) {
+        result[tail[i][2][0]] = fixNull(tail[i][2][1]);
+      }
+      return result;
+    }
+
+pair
+  = name:key _ ":" _ value:value { return [name, value]; }
+
+array
+  = "[" _ "]" _                   { return [];       }
+  / "[" _ elements:elements "]" _ { return elements; }
+
+elements
+  = ","? head:value? tail:("," _ value)* ","? _ {
+      var result = [];
+      if( typeof head !== 'undefined' && head !== null ) { result.push( fixNull(head) ) }
+      for (var i = 0; i < tail.length; i++) {
+        result.push(fixNull(tail[i][2]));
+      }
+      return result;
+    }
+
+value
+  = string
+  / single
+  / object
+  / array
+  / "true" _  { return true;  }
+  / "false" _ { return false; }
+  / "null" _  { return null_; }
+  / number
+  / lit:literal { return lit.join('').trim() }
+
+/* ===== Lexical Elements ===== */
+
+string "double-quote string"
+  = '"' '"' _             { return "";    }
+  / '"' chars:chars '"' _ { return chars; }
+
+single "single-quote string"
+  = '\'' '\'' _             { return "";    }
+  / '\'' chars:schars '\'' _ { return chars; }
+
+chars
+  = chars:char+ { return chars.join(""); }
+
+char
+  // In the original JSON grammar: "any-Unicode-character-except-"-or-\-or-control-character"
+  = [^"\\\0-\x1F\x7f]
+  / '\\"'  { return '"';  }
+  / "\\\\" { return "\\"; }
+  / "\\/"  { return "/";  }
+  / "\\b"  { return "\b"; }
+  / "\\f"  { return "\f"; }
+  / "\\n"  { return "\n"; }
+  / "\\r"  { return "\r"; }
+  / "\\t"  { return "\t"; }
+  / "\\u" h1:hexDigit h2:hexDigit h3:hexDigit h4:hexDigit {
+      return String.fromCharCode(parseInt("0x" + h1 + h2 + h3 + h4)); }
+
+schars
+  = chars:schar+ { return chars.join(""); }
+
+schar
+  // In the original JSON grammar: "any-Unicode-character-except-"-or-\-or-control-character"
+  = [^'\\\0-\x1F\x7f]
+  / '\\\''  { return '\'';  }
+  / "\\\\" { return "\\"; }
+  / "\\/"  { return "/";  }
+  / "\\b"  { return "\b"; }
+  / "\\f"  { return "\f"; }
+  / "\\n"  { return "\n"; }
+  / "\\r"  { return "\r"; }
+  / "\\t"  { return "\t"; }
+  / "\\u" h1:hexDigit h2:hexDigit h3:hexDigit h4:hexDigit {
+      return String.fromCharCode(parseInt("0x" + h1 + h2 + h3 + h4)); }
+
+
+key "key"
+  = string
+  / single
+  / chars:[a-zA-Z0-9_\$\-]+ { return chars.join('') }
+
+literal
+  = lit:litchar+
+
+litchar
+  = [^,}\]]
+
+
+number "number"
+
+  = int_:int frac:frac exp:exp _ suffix:litchar*
+      { return 0 === suffix.length ? parseFloat(int_ + frac + exp) : (int_  + frac + exp + suffix.join('')).trim(); }
+
+  / int_:int frac:frac _ suffix:litchar*
+      { return 0 === suffix.length ? parseFloat(int_ + frac) : (int_ + frac + suffix.join('')).trim(); }
+
+  / int_:int exp:exp _ suffix:litchar*
+      { return 0 === suffix.length ? parseFloat(int_ + exp) : (int_ + exp + suffix.join('')).trim(); }
+
+  / int_:int _ suffix:litchar*
+      { return 0 === suffix.length ? parseFloat(int_) : (int_ + suffix.join('')).trim(); }
+
+
+int
+  = digit19:digit19 digits:digits     { return digit19 + digits;       }
+  / digit:digit
+  / "-" digit19:digit19 digits:digits { return "-" + digit19 + digits; }
+  / "-" digit:digit                   { return "-" + digit;            }
+
+frac
+  = "." digits:digits { return "." + digits; }
+
+exp
+  = e:e digits:digits { return e + digits; }
+
+digits
+  = digits:digit+ { return digits.join(""); }
+
+e
+  = e:[eE] sign:[+-]? { return e + (sign?sign:''); }
+
+digit
+  = [0-9]
+
+digit19
+  = [1-9]
+
+hexDigit
+  = [0-9a-fA-F]
+
+
+
+
+/* ===== Whitespace ===== */
+
+_ "whitespace"
+  = whitespace*
+
+// Whitespace is undefined in the original JSON grammar, so I assume a simple
+// conventional definition consistent with ECMA-262, 5th ed.
+whitespace
+  = [ \t\n\r]
+