Does find support OR in its regexes?

Question

For example, I want to find all files in a directory that end in 'm' or 'sh'. The following works correctly:

find . -regex '.*.m' -o -regex '.*.sh'

But this fails:

find . -regex '.*.(m|sh)'

What am I doing wrong?

Answer 1

Just escaping hell:

find . -regex '.*.\(m\|sh\)

appears to work. I don't think there's much consensus whether regexp special chars need to be escaped or need to be unescaped between different tools.