func NewReaderLexer(rdr io.Reader) *parser.Lexer {
	l := parser.NewReaderLexer(rdr, SymbolSet)
	l.SetTagStart("[%")
	l.SetTagEnd("%]")

	return l
}
func NewReaderLexer(rdr io.Reader) *parser.Lexer {
	l := parser.NewReaderLexer(rdr, SymbolSet)
	l.SetTagStart("[%")
	l.SetTagEnd("%]")

	return l
}
// NewReaderLexer creates a new lexer