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: keyword.go
    path of file: ./repos/sliver/vendor/github.com/reeflective/readline/internal/strutil
    
    the code of the file until where you have to start completion: package strutil

import (
	"fmt"
	"math"
	"math/big"
	"reg
    
func AdjustNumberOperatorPos(cpos int, line []rune) int {
	word := lineSlice(line, cpos, 2)

	if match, _ := regexp.MatchString(`[+-][0-9]`, word); match {
		// If cursor is on the `+` or `-`, we need to check if it is a
		// number with a sign or an operator, only the number needs to
		// forward the cursor.
		digit := regexp.MustCompile(`[^0-9]`)
		if cpos == 0 || digit.MatchString(string(line[cpos-1])) {
			cpos++
		}
	} else if match, _ := regexp.MatchString(`[+-][a-zA-Z]`, word); match {
		// If cursor is on the `+` or `-`, we need to check if it is a
		// short option, only the short option needs to forward the cursor.
		if cpos == 0 || line[cpos-1] == ' ' {
			cpos++
		}
	}

	return cpos
}