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: proc_limits.go
    path of file: ./repos/faas/gateway/vendor/github.com/prometheus/procfs
    
    the code of the file until where you have to start completion: // Copyright 2018 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package procfs

import (
	"bufio"
	"fmt"
	"os"
	"regexp"
	"strconv"
)

// ProcLimits represents the soft limits for each of the process's resource
// limits. For more information see getrlimit(2):
// http://man7.org/linux/man-pages/man2/getrlimit.2.html.
type ProcLimits struct {
	// CPU time limit in seconds.
	CPUTime uint64
	// Maximum size of files that the process may create.
	FileSize uint64
	// Maximu
    
func (p Proc) Limits() (ProcLimits, error) {
	f, err := os.Open(p.path("limits"))
	if err != nil {
		return ProcLimits{}, err
	}
	defer f.Close()

	var (
		l = ProcLimits{}
		s = bufio.NewScanner(f)
	)

	s.Scan() // Skip limits header

	for s.Scan() {
		//fields := limitsMatch.Split(s.Text(), limitsFields)
		fields := limitsMatch.FindStringSubmatch(s.Text())
		if len(fields) != limitsFields {
			return ProcLimits{}, fmt.Errorf("%w: couldn't parse %q line %q", ErrFileParse, f.Name(), s.Text())
		}

		switch fields[1] {
		case "Max cpu time":
			l.CPUTime, err = parseUint(fields[2])
		case "Max file size":
			l.FileSize, err = parseUint(fields[2])
		case "Max data size":
			l.DataSize, err = parseUint(fields[2])
		case "Max stack size":
			l.StackSize, err = parseUint(fields[2])
		case "Max core file size":
			l.CoreFileSize, err = parseUint(fields[2])
		case "Max resident set":
			l.ResidentSet, err = parseUint(fields[2])
		case "Max processes":
			l.Processes, err = parseUint(fields[2])
		case "Max open files":
			l.OpenFiles, err = parseUint(fields[2])
		case "Max locked memory":
			l.LockedMemory, err = parseUint(fields[2])
		case "Max address space":
			l.AddressSpace, err = parseUint(fields[2])
		case "Max file locks":
			l.FileLocks, err = parseUint(fields[2])
		case "Max pending signals":
			l.PendingSignals, err = parseUint(fields[2])
		case "Max msgqueue size":
			l.MsqqueueSize, err = parseUint(fields[2])
		case "Max nice priority":
			l.NicePriority, err = parseUint(fields[2])
		case "Max realtime priority":
			l.RealtimePriority, err = parseUint(fields[2])
		case "Max realtime timeout":
			l.RealtimeTimeout, err = parseUint(fields[2])
		}
		if err != nil {
			return ProcLimits{}, err
		}
	}

	return l, s.Err()
}