change approach again

node_modules/command-line-args/lib/value-arg.js

@@ -0,0 +1,18 @@
+'use strict'
+const t = require('typical')
+const option = require('./option')
+const reBeginsWithValueMarker = new RegExp('^' + option.VALUE_MARKER)
+
+class ValueArg {
+  constructor (value) {
+    this.isOptionValueNotationValue = reBeginsWithValueMarker.test(value)
+    /* if the value marker is present at the value beginning, strip it */
+    this.value = value ? value.replace(reBeginsWithValueMarker, '') : value
+  }
+
+  isDefined () {
+    return t.isDefined(this.value)
+  }
+}
+
+module.exports = ValueArg