Function: posix-looking-at
posix-looking-at is a function defined in search.c.
Signature
(posix-looking-at REGEXP &optional INHIBIT-MODIFY)
Documentation
Return t if text after point matches REGEXP according to Posix rules.
Find the longest match, in accordance with Posix regular expression rules.
By default, this function modifies the match data that
match-beginning, match-end and match-data access. If
INHIBIT-MODIFY is non-nil, don't modify the match data.
Probably introduced at or before Emacs version 19.29.
Source Code
// Defined in /usr/src/emacs/src/search.c
{
return looking_at_1 (regexp, 1, NILP (inhibit_modify));
}