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: runewidth.go
    path of file: ./repos/podman/vendor/github.com/mattn/go-runewidth
    
    the code of the file until where you have to start completion: package runewidth

import (
	"os"
	"strings"

	"github.com/rivo/uniseg"
)

//go:generate go run script/generate.go

var (
	// EastAsianWidth will be set true if the current locale is CJK
	EastAsianWidth bool

	// StrictEmojiNeutral should be set false if handle broken fonts
	StrictEmojiNeutral 
    
func (c *Condition) StringWidth(s string) (width int) {
	g := uniseg.NewGraphemes(s)
	for g.Next() {
		var chWidth int
		for _, r := range g.Runes() {
			chWidth = c.RuneWidth(r)
			if chWidth > 0 {
				break // Our best guess at this point is to use the width of the first non-zero-width rune.
			}
		}
		width += chWidth
	}
	return
}