Returns T if REGEX starts with a real start
anchor, i.e. one that's not in multi-line mode, NIL otherwise. If
IN-SEQ-P is true the function will return :ZERO-LENGTH if REGEX is a
zero-length assertion.
start-anchored-p < alternation > |
start-anchored-p < anchor > |
start-anchored-p < branch > |
start-anchored-p < regex > |
start-anchored-p < register > |
start-anchored-p < repetition > |
start-anchored-p < seq > |
start-anchored-p < standalone > |