      case NODE_SCOPE:
	return "NODE_SCOPE";
      case NODE_BLOCK:
	return "NODE_BLOCK";
      case NODE_IF:
	return "NODE_IF";
      case NODE_CASE:
	return "NODE_CASE";
      case NODE_WHEN:
	return "NODE_WHEN";
      case NODE_OPT_N:
	return "NODE_OPT_N";
      case NODE_WHILE:
	return "NODE_WHILE";
      case NODE_UNTIL:
	return "NODE_UNTIL";
      case NODE_ITER:
	return "NODE_ITER";
      case NODE_FOR:
	return "NODE_FOR";
      case NODE_BREAK:
	return "NODE_BREAK";
      case NODE_NEXT:
	return "NODE_NEXT";
      case NODE_REDO:
	return "NODE_REDO";
      case NODE_RETRY:
	return "NODE_RETRY";
      case NODE_BEGIN:
	return "NODE_BEGIN";
      case NODE_RESCUE:
	return "NODE_RESCUE";
      case NODE_RESBODY:
	return "NODE_RESBODY";
      case NODE_ENSURE:
	return "NODE_ENSURE";
      case NODE_AND:
	return "NODE_AND";
      case NODE_OR:
	return "NODE_OR";
      case NODE_MASGN:
	return "NODE_MASGN";
      case NODE_LASGN:
	return "NODE_LASGN";
      case NODE_DASGN:
	return "NODE_DASGN";
      case NODE_DASGN_CURR:
	return "NODE_DASGN_CURR";
      case NODE_GASGN:
	return "NODE_GASGN";
      case NODE_IASGN:
	return "NODE_IASGN";
      case NODE_IASGN2:
	return "NODE_IASGN2";
      case NODE_CDECL:
	return "NODE_CDECL";
      case NODE_CVASGN:
	return "NODE_CVASGN";
      case NODE_CVDECL:
	return "NODE_CVDECL";
      case NODE_OP_ASGN1:
	return "NODE_OP_ASGN1";
      case NODE_OP_ASGN2:
	return "NODE_OP_ASGN2";
      case NODE_OP_ASGN_AND:
	return "NODE_OP_ASGN_AND";
      case NODE_OP_ASGN_OR:
	return "NODE_OP_ASGN_OR";
      case NODE_OP_CDECL:
	return "NODE_OP_CDECL";
      case NODE_CALL:
	return "NODE_CALL";
      case NODE_FCALL:
	return "NODE_FCALL";
      case NODE_VCALL:
	return "NODE_VCALL";
      case NODE_SUPER:
	return "NODE_SUPER";
      case NODE_ZSUPER:
	return "NODE_ZSUPER";
      case NODE_ARRAY:
	return "NODE_ARRAY";
      case NODE_ZARRAY:
	return "NODE_ZARRAY";
      case NODE_VALUES:
	return "NODE_VALUES";
      case NODE_HASH:
	return "NODE_HASH";
      case NODE_RETURN:
	return "NODE_RETURN";
      case NODE_YIELD:
	return "NODE_YIELD";
      case NODE_LVAR:
	return "NODE_LVAR";
      case NODE_DVAR:
	return "NODE_DVAR";
      case NODE_GVAR:
	return "NODE_GVAR";
      case NODE_IVAR:
	return "NODE_IVAR";
      case NODE_CONST:
	return "NODE_CONST";
      case NODE_CVAR:
	return "NODE_CVAR";
      case NODE_NTH_REF:
	return "NODE_NTH_REF";
      case NODE_BACK_REF:
	return "NODE_BACK_REF";
      case NODE_MATCH:
	return "NODE_MATCH";
      case NODE_MATCH2:
	return "NODE_MATCH2";
      case NODE_MATCH3:
	return "NODE_MATCH3";
      case NODE_LIT:
	return "NODE_LIT";
      case NODE_STR:
	return "NODE_STR";
      case NODE_DSTR:
	return "NODE_DSTR";
      case NODE_XSTR:
	return "NODE_XSTR";
      case NODE_DXSTR:
	return "NODE_DXSTR";
      case NODE_EVSTR:
	return "NODE_EVSTR";
      case NODE_DREGX:
	return "NODE_DREGX";
      case NODE_DREGX_ONCE:
	return "NODE_DREGX_ONCE";
      case NODE_ARGS:
	return "NODE_ARGS";
      case NODE_ARGS_AUX:
	return "NODE_ARGS_AUX";
      case NODE_OPT_ARG:
	return "NODE_OPT_ARG";
      case NODE_KW_ARG:
	return "NODE_KW_ARG";
      case NODE_POSTARG:
	return "NODE_POSTARG";
      case NODE_ARGSCAT:
	return "NODE_ARGSCAT";
      case NODE_ARGSPUSH:
	return "NODE_ARGSPUSH";
      case NODE_SPLAT:
	return "NODE_SPLAT";
      case NODE_TO_ARY:
	return "NODE_TO_ARY";
      case NODE_BLOCK_ARG:
	return "NODE_BLOCK_ARG";
      case NODE_BLOCK_PASS:
	return "NODE_BLOCK_PASS";
      case NODE_DEFN:
	return "NODE_DEFN";
      case NODE_DEFS:
	return "NODE_DEFS";
      case NODE_ALIAS:
	return "NODE_ALIAS";
      case NODE_VALIAS:
	return "NODE_VALIAS";
      case NODE_UNDEF:
	return "NODE_UNDEF";
      case NODE_CLASS:
	return "NODE_CLASS";
      case NODE_MODULE:
	return "NODE_MODULE";
      case NODE_SCLASS:
	return "NODE_SCLASS";
      case NODE_COLON2:
	return "NODE_COLON2";
      case NODE_COLON3:
	return "NODE_COLON3";
      case NODE_CREF:
	return "NODE_CREF";
      case NODE_DOT2:
	return "NODE_DOT2";
      case NODE_DOT3:
	return "NODE_DOT3";
      case NODE_FLIP2:
	return "NODE_FLIP2";
      case NODE_FLIP3:
	return "NODE_FLIP3";
      case NODE_SELF:
	return "NODE_SELF";
      case NODE_NIL:
	return "NODE_NIL";
      case NODE_TRUE:
	return "NODE_TRUE";
      case NODE_FALSE:
	return "NODE_FALSE";
      case NODE_ERRINFO:
	return "NODE_ERRINFO";
      case NODE_DEFINED:
	return "NODE_DEFINED";
      case NODE_POSTEXE:
	return "NODE_POSTEXE";
      case NODE_ALLOCA:
	return "NODE_ALLOCA";
      case NODE_BMETHOD:
	return "NODE_BMETHOD";
      case NODE_MEMO:
	return "NODE_MEMO";
      case NODE_IFUNC:
	return "NODE_IFUNC";
      case NODE_DSYM:
	return "NODE_DSYM";
      case NODE_ATTRASGN:
	return "NODE_ATTRASGN";
      case NODE_PRELUDE:
	return "NODE_PRELUDE";
      case NODE_LAMBDA:
	return "NODE_LAMBDA";
