Very nice! Can you tell what is the idea behind of {'(', '{', '['} being vector and not set? Also, do we need the last check if (c == s.top()) or we can simply pop at that stage?

The regex should have [1-9]?[0-9] instead [0-9]{1,2} to deal with 01.02.03.04

for 123.45.67.89.000.000.000 it returns true

There should be test for something like 123.45.67.89.abc or 123.45.67.89.001 otherwise this code passes

+() here is superfluous

You don't need the first plus, as the first argument is number.
And without it you can make everything symmetrically cooler =)

(b,d) -> b+ +d