removed JSON.parse hack

gss · Jan 3, 2015 · db7bd91 · db7bd91
1 parent f5de9df
commit db7bd91
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Showing 2 changed files with 27 additions and 3 deletions.
diff --git a/lib/grammar.js b/lib/grammar.js
@@ -1,4 +1,18 @@
-var Grammar;
+var Grammar, cloneCommand;
+
+cloneCommand = function(command) {
+  var clone, part, _i, _len;
+  clone = [];
+  for (_i = 0, _len = command.length; _i < _len; _i++) {
+    part = command[_i];
+    if (typeof part !== 'object') {
+      clone.push(part);
+    } else if (part instanceof Array) {
+      clone.push(cloneCommand(part));
+    }
+  }
+  return clone;
+};
 
 Grammar = (function() {
   /* Private*/
@@ -61,7 +75,7 @@ Grammar = (function() {
         _ref = outie.slice(1, outie.length);
         for (_i = 0, _len = _ref.length; _i < _len; _i++) {
           outieCommand = _ref[_i];
-          innieClone = JSON.parse(JSON.stringify(innie));
+          innieClone = cloneCommand(innie);
           results.push(this.reverseFilterNest([innieClone, outieCommand]));
         }
         commands[i] = results;

diff --git a/src/grammar.coffee b/src/grammar.coffee
@@ -1,5 +1,15 @@
 # A CoffeeScript representation of the PEG grammar.
 #
+
+cloneCommand = (command) ->
+  clone = []
+  for part in command
+    if typeof part isnt 'object'
+      clone.push part
+    else if part instanceof Array
+      clone.push cloneCommand part
+  clone
+
 class Grammar
 
   ### Private ###
@@ -100,7 +110,7 @@ class Grammar
       if outie[0] is ','
         results = [',']
         for outieCommand in outie[1...outie.length]
-          innieClone = JSON.parse JSON.stringify innie
+          innieClone = cloneCommand innie
           results.push @reverseFilterNest [innieClone, outieCommand]
         commands[i] = results