parser.go
func isMatchPattern(s string) bool {
	return len(s) > 2 && s[0] == '<' && s[len(s)-1] == '>'
}
func isMatchPattern(s string) bool {
	return len(s) > 2 && s[0] == '<' && s[len(s)-1] == '>'
}
func isMatchPattern ( s string ) bool { return len ( s ) > 2 && s [ 0 ] == '<' && s [ len ( s ) - 1 ] == '>' }
// isMatchPattern see if given string is match pattern.
isMatchPattern see if given string is match pattern .