You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: svcb.go
    path of file: ./repos/sliver/implant/vendor/github.com/miekg/dns
    
    the code of the file until where you have to start completion: package dns

import (
	"bytes"
	"encoding/binary"
	"errors"
	
    
func (s *SVCBAlpn) parse(b string) error {
	if len(b) == 0 {
		s.Alpn = []string{}
		return nil
	}

	alpn := []string{}
	a := []byte{}
	for p := 0; p < len(b); {
		c, q := nextByte(b, p)
		if q == 0 {
			return errors.New("dns: svcbalpn: unterminated escape")
		}
		p += q
		// If we find a comma, we have finished reading an alpn.
		if c == ',' {
			if len(a) == 0 {
				return errors.New("dns: svcbalpn: empty protocol identifier")
			}
			alpn = append(alpn, string(a))
			a = []byte{}
			continue
		}
		// If it's a backslash, we need to handle a comma-separated list.
		if c == '\\' {
			dc, dq := nextByte(b, p)
			if dq == 0 {
				return errors.New("dns: svcbalpn: unterminated escape decoding comma-separated list")
			}
			if dc != '\\' && dc != ',' {
				return errors.New("dns: svcbalpn: bad escaped character decoding comma-separated list")
			}
			p += dq
			c = dc
		}
		a = append(a, c)
	}
	// Add the final alpn.
	if len(a) == 0 {
		return errors.New("dns: svcbalpn: last protocol identifier empty")
	}
	s.Alpn = append(alpn, string(a))
	return nil
}