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: ucd.go
    path of file: ./repos/minicron/client/vendor/golang.org/x/text/internal/ucd
    
    the code of the file until where you have to start completion: // Copyright 2014 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Package ucd provides a parser for Unicode Character Database files, the
// format of which is defined in http://www.unicode.org/reports/tr44/. See
// http://www.unicode.org/Public/UCD/latest/ucd/ for example files.
//
// It currently does not support substitutions of missing fields.
package ucd // import "golang.org/x/text/internal/ucd"

import (
	"bufio"
	"errors"
	"fmt"
	"io"

    
func (p *Parser) Next() bool {
	if !p.keepRanges && p.rangeStart < p.rangeEnd {
		p.rangeStart++
		return true
	}
	p.comment = ""
	p.field = p.field[:0]
	p.parsedRange = false

	for p.scanner.Scan() && p.err == nil {
		p.line++
		s := p.scanner.Text()
		if s == "" {
			continue
		}
		if s[0] == '#' {
			if p.commentHandler != nil {
				p.commentHandler(strings.TrimSpace(s[1:]))
			}
			continue
		}

		// Parse line
		if i := strings.IndexByte(s, '#'); i != -1 {
			p.comment = strings.TrimSpace(s[i+1:])
			s = s[:i]
		}
		if s[0] == '@' {
			if p.partHandler != nil {
				p.field = append(p.field, strings.TrimSpace(s[1:]))
				p.partHandler(p)
				p.field = p.field[:0]
			}
			p.comment = ""
			continue
		}
		for {
			i := strings.IndexByte(s, ';')
			if i == -1 {
				p.field = append(p.field, strings.TrimSpace(s))
				break
			}
			p.field = append(p.field, strings.TrimSpace(s[:i]))
			s = s[i+1:]
		}
		if !p.keepRanges {
			p.rangeStart, p.rangeEnd = p.getRange(0)
		}
		return true
	}
	p.setError(p.scanner.Err(), "scanner failed")
	return false
}