c++ - Regular expression to match one or more characters every type? -

there 3 types of characters: a-z, a-z , 0-9.

how write regular expression match words have 1 or more characters in 3 types?

for example:

match: abacc88, ua8za8, 88aa

no match: abc, 118, aa7, xxzz, xyz111

this boost::regex re("^[a-za-z0-9]+$"); doesn't work.

thanks

assuming you're testing each word separately:

boost::regex re("(?=.*[a-z])(?=.*[a-z])(?=.*[0-9])");

no need anchors.

actually, in case boost doesn't support lookarounds:

boost::regex re(".*[a-z].*([a-z].*[0-9]|[0-9].*[a-z])|.*[a-z].*([a-z].*[0-9]|[0-9].*[a-z])|.*[0-9].*([a-z].*[a-z]|[a-z].*[a-z])");

this every combination, @bill has pointed out.

Parth Code