%{
#includes, etc.
globals
externs
%}

%options

MACROS   regex

%%

regexpressions		{ C code when that regex matches  }
      a			matches itself
     abc		concatenation
      a*		zero or more
     a|b		a or b
     (a)                matches a

    [abc]		character set - any 1
    [123a-cdef]		character set - any 1 from a range
    [^123a-cdef]	character set - any 1 not in the set
     ^a			match a only when it is at the beginning of a line
      a$		match a only when it is at the end of a line
      a+		one or more
      a?		zero or one
     \*			matches *
     ""			matches nothing
     "*"		matches *
      .			matches anything except newline
      {MACRONAME}	replaced by a macro definition
      (....){4}		matches 4 times
      (....){3,6}	matches from 3 to 6 times


regexpressions		{ C code when that regex matches  }

regexpressions		{ C code when that regex matches  }


%%