step1、install Xcode
step2、install xcpkg
step3、update xcpkg-formula-repository
xcpkg update
step4、build and install re2
xcpkg install re2
xcpkg formula view re2
{{ formula }}
if the formula of re2 dosn't meet your needs, you can edit it ⤵︎
xcpkg formula edit re2
after editing, you may want to rebuild this package ⤵︎
xcpkg install re2