To install this package, run in Emacs:
M-x package-install RET lex RET
Format of regexps is the same as used for `rx' and `sregex'. Additions: - (ere RE) specify regexps using the ERE syntax. - (inter REs...) (aka `&') make a regexp that only matches if all its branches match. E.g. (inter (ere ".*a.*") (ere ".*b.*")) match any string that contain both an "a" and a "b", in any order. - (case-fold REs...) and (case-sensitive REs...) make a regexp that is case sensitive or not, regardless of case-fold-search. Input format of lexers: ALIST of the form ((RE . VAL) ...) Format of compiled DFA lexers: nil ; The trivial lexer that fails (CHAR . LEXER) (table . CHAR-TABLE) (stop VAL . LEXER) ; Match the empty string at point or LEXER. (check (PREDICATE . ARG) SUCCESS-LEXER . FAILURE-LEXER) Intermediate NFA nodes may additionally look like: (or LEXERs...) (orelse LEXERs...) (and LEXERs...) (join CONT . EXIT) Note: we call those things "NFA"s but they're not really NFAs.