was bedeutet "/" bei flex?

[hastenichtjesehen]

Hallo was genau bedeutet dieser obiuge ausdruck beio flex?

Sei z.B. r/s gegeben.

Bedeutet dies, dass ab r alle Zeichen gelesen werden bis ein s kommt?

Vieln dank

[Bashar]

rtfm?

r/s        an r but only if it is followed by an s.  The
                        text matched by s is included when determining
                        whether this rule is the "longest match",
                        but is then returned to the input before
                        the action is executed.  So the action only
                        sees the text matched by r.  This type
                        of pattern is called trailing context".
                        (There are some combinations of r/s that flex
                        cannot match correctly; see notes in the
                        Deficiencies / Bugs section below regarding
                        "dangerous trailing context".)