lib/macroParser.js
function(match, value, index, length) {
  if (!this.currentMacro) return;
  this.currentMacro.args.push({
    start: index + value.length,
    index: index,
    length: length,
    value: value
  });
}
function(match, value, index, length) {
  if (!this.currentMacro) return;
  this.currentMacro.args.push({
    start: index + value.length,
    index: index,
    length: length,
    value: value
  });
}
Parses a macro string argument