regexinter is built for checking two regular expressions (regex) have intersection (conflict) or not. It's based on https://gitlab.com/opennota/re2dfa project.
go get -u github.com/oulinbao/regexinter
make
./regexinter "a*" "a+"
regexinter is released under the GNU General Public License version 3.0.
If you find some bugs or have some good points to extend, please raise a PR.