https://bugs.exim.org/show_bug.cgi?id=1680
--- Comment #1 from Philip Hazel <p...@hermes.cam.ac.uk> --- I don't think ^a\d+b$ is the intersection of ^a\d+ and \d+b$ if you mean "matches strings that match each separate pattern". I think the intersection is ^a\d+(.+\d+)?b$ because the first means "starts with a\d+" and the second means "ends with \d+b". The string "a123xyz456b" meets that description but does not match ^a\d+b$. PCRE isn't into manipulating regular expressions. However, you can write patterns that do "and" type matching using lookahead assertions. For example, if you want to match strings that match A and B and C (where A, B, C are complex patterns) you can use ^(?=.*A)(?=.*B)(?=.*C) or just ^(?=.*A)(?=.*B).*C. For example, to match lines that contain both "cat" and "dog" you can write ^(?=.*cat)(?=.*dog). [If you want to capture matched strings, it gets a bit more involved.] -- You are receiving this mail because: You are on the CC list for the bug. -- ## List details at https://lists.exim.org/mailman/listinfo/pcre-dev
