Genex package for Go
Easy and efficient package to expand any given regex into all the possible strings that it can match.
This is the code that powers namegrep.
package main
import (
"fmt"
"regexp/syntax"
"github.com/alixaxel/genex"
)
func main() {
charset, _ := syntax.Parse(`[0-9a-z]`, syntax.Perl)
if input, err := syntax.Parse(`(foo|bar|baz){1,2}\d`, syntax.Perl); err == nil {
fmt.Println("Count:", genex.Count(input, charset, 3))
genex.Generate(input, charset, 3, func(output string) {
fmt.Println("[*]", output)
})
}
}Count: 120
[*] foo0
[*] ...
[*] foo9
[*] foofoo0
[*] ...
[*] foofoo9
[*] foobar0
[*] ...
[*] foobar9
[*] foobaz0
[*] ...
[*] foobaz9
[*] bar0
[*] ...
[*] bar9
[*] barfoo0
[*] ...
[*] barfoo9
[*] barbar0
[*] ...
[*] barbar9
[*] barbaz0
[*] ...
[*] barbaz9
[*] baz0
[*] ...
[*] baz9
[*] bazfoo0
[*] ...
[*] bazfoo9
[*] bazbar0
[*] ...
[*] bazbar9
[*] bazbaz0
[*] ...
[*] bazbaz9
go get github.com/alixaxel/genex
MIT