a javascript parser for lua object, use PEG.js to generate parser code

lua_value.pegjs

start = S v:value S { return v; }
s = [ \t\r\n]
S = s*
SEP = S [,;]? S
name = c:[a-zA-Z0-9_]+ { return c.join(""); }
 
number = c:[0-9.+-]+ { return parseFloat(c.join("")); }
bool = s:('true' / 'false') { return s === 'true'; }
string = '"' s:([^"] / ('\\"' { return '"'}))* '"' { return s.join(""); }
 
key = ('[' k:(number / string) ']' { return k }) / name
value = number / bool / string / object
 
kvpair = key:key S '=' S value:value { return { key: key, value: value } }
object_entry = p:kvpair { return p; } / v:value { return v; }
object = '{' entries:( S e:object_entry SEP {return e;})* '}' {
  var result = {};
  var arr = [];
  var is_array = true;
  var index = 0;
  for(var i = 0; i < entries.length; i++)
  {
    var e = entries[i];
    if(typeof(e) == "object" && !(e instanceof Array) && e.key)
    {
      result[e.key] = e.value;
      is_array = false;
    }
    else
    {
      result[index] = e;
      arr[index] = e;
      index++;
    }
  }
 
  if(arr.length > 0)
  {
    result["#"] = arr.length;
  }
  return is_array ? arr : result;
}