Cannot use '_1' as a thrift identifier.

[janghwan]

The native thrift allows underscore in variable name, but scrooge scala generator does not seem to handle it properly.

This thrift definition

struct StringTuple {
  1: string _1,
  2: string _2
}

generates

trait StringTuple
  extends ThriftStruct
  with scala.Product2[String, String]
  with java.io.Serializable
{
  import StringTuple._

  def _1: String
  def _2: String

  def _passthroughFields: immutable$Map[Short, TFieldBlob] = immutable$Map.empty

  def _1 = _1
  def _2 = _2
//...

, which is wrong obviously.
The identifiers need to be escaped as long as it uses scala.Product.