first pass at grammar

doesn't work with Objects as values right now

Author: alunny

examples/simple.pbxproj

@@ -0,0 +1,6 @@
+// !$*UTF8*$!
+{
+    archiveVersion = 1;
+    objectVersion = 45;
+    rootObject = 29B97313FDCFA39411CA2CEA /* Project object */;
+}

pbxproj.pegjs

@@ -0,0 +1,84 @@
+{
+    function merge(hash, secondHash) {
+        secondHash = secondHash[0]
+        for(var i in secondHash)
+            hash[i] = secondHash[i]
+
+        return hash;
+    }
+}
+
+Project
+  = headComment:SingleLineComment? obj:Object NewLine
+    {
+        var proj = Object.create(null)
+        proj.project = obj
+
+        if (headComment) {
+            proj.headComment = headComment
+        }
+
+        return proj;
+    }
+
+Anything
+  = Char / EOF
+
+Object
+  = "{" obj:Definition "}"
+    { return obj }
+
+Definition
+  = _ head:Assignment _ tail:((Definition)*) _
+    { 
+      if (tail) return merge(head,tail)
+      else return head
+    }
+
+Assignment
+  = id:Identifier _ "=" _ val:Value ";"
+    { 
+      var result = Object.create(null);
+      result[id.join('')] = val.join('')
+      return result
+    }
+
+Identifier
+  = [A-Za-z0-9]+
+
+Value
+  = [^;\n]+ / Object
+
+SingleLineComment
+  = "//" _ contents:OneLineString NewLine
+    { return contents }
+
+Terminator
+    = NewLine? EOF
+
+OneLineString
+  = contents:NonLine*
+    { return contents.join('') }
+
+_ "whitespace"
+  = whitespace*
+
+whitespace
+  = NewLine / [\t ]
+
+NonLine
+  = !NewLine char:Char
+    { return char }
+
+NewLine
+    = [\n\r]
+
+EOF
+    = !.
+
+String
+  = str:Char*
+    { return str.join('') }
+
+Char
+  = .