package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?<=[0-9a-zA-Z])\h*([+\-\=])\h*(-?[0-9a-zA-Z])`)
var str = `+5 + 3
+5+3=3
-d+7
-1-a
+3
+4
-1
3+
4-`
var substitution = " $1 $2"
fmt.Println(re.ReplaceAllString(str, substitution))
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Golang, please visit: https://golang.org/pkg/regexp/