Re: [gobo-eiffel-develop] Regular expression syntax

[Eric B. <er...@go...>]

Colin Paul Adams wrote:
>>>>>> "Franck" == Franck Arnaud <fr...@ne...> writes:
> 
>     >> For XML 1.1, the equivalent to \c is 3830417 bytes long.
>     >> 
>     >> This is definitely too big, so something is wrong with the test
>     >> program. Can anyone see where the fault is (I know it's not the
>     >> most efficient way of doing it):
> 
>     Franck> it should get (much?) more compact by collapsing adjacent
>     Franck> ranges into forms "\x\y[\z1-\z2]" or "\x\y." (example for
>     Franck> 3 byte utf8 sequences.)
> 
> I don't understand what you mean.

Instead of having:

    (...|\x\y\z1|\x\y\z2|...|\x\y\zn|...)

where \z1, \z2, ..., \zn are consecutive bytes,
you can generate:

    (...|\x\y[\z1-\zn]|...)

-- 
Eric Bezault
mailto:er...@go...
http://www.gobosoft.com