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: reporter.go
    path of file: ./repos/learning/golang/practice/go-crontab/gopath/src/github.com/mongodb/mongo-go-driver/vendor/github.com/google/go-cmp/cmp
    
    the code of the file until where you have to start completion: // Copyright 2017, 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.md file.

package cmp

import (
	"fmt"
	"reflect"
	"strings"

	"github.com/google/go-cmp/cmp/internal/value"
)

type defaultReporter struct {
	Option
	diffs  []string // List of differences, possibly truncated
	ndiffs int      // Total number of differences
	nbytes int      // Number of bytes in diffs
	nlines int      // Number of li
    
func (r *defaultReporter) Report(x, y reflect.Value, eq bool, p Path) {
	if eq {
		return // Ignore equal results
	}
	const maxBytes = 4096
	const maxLines = 256
	r.ndiffs++
	if r.nbytes < maxBytes && r.nlines < maxLines {
		sx := value.Format(x, value.FormatConfig{UseStringer: true})
		sy := value.Format(y, value.FormatConfig{UseStringer: true})
		if sx == sy {
			// Unhelpful output, so use more exact formatting.
			sx = value.Format(x, value.FormatConfig{PrintPrimitiveType: true})
			sy = value.Format(y, value.FormatConfig{PrintPrimitiveType: true})
		}
		s := fmt.Sprintf("%#v:\n\t-: %s\n\t+: %s\n", p, sx, sy)
		r.diffs = append(r.diffs, s)
		r.nbytes += len(s)
		r.nlines += strings.Count(s, "\n")
	}
}