Hi Iñaki,
Using conditionals is one way. I'm not sure I fully understand your use
case, but I think you can also make use of the ability to enter into any
named instantiation. All machine instances are defined in the data
section as constant values. It's just a matter of setting the current
state to the appropriate value.
-Adrian
On 14-04-10 04:52 PM, Iñaki Baz Castillo wrote:
2014-04-10 22:08 GMT+02:00 Iñaki Baz Castillo <i...@aliax.net>:
Hi,
I'm building a parser for a protocol message similar to HTTP (let's
say: a main header and N key: value separated by CRLF until a final
double CRLF). My concern is:
- I parse the messages in a "Dispatcher" module that just needs to
parse a few fields in each message.
- Then the Dispatcher passes the message to a Worker thread via UNIX Socket.
- And the Worker must parse it again, but in this case I need all the
fields parsed.
Note that during the Worker's parsing, a C++ complex object is build
with all the parsed fields mapped into member variables, so I don't
want to play with those complex objects in the Dispatcher module.
How could I reuse the same Ragel machine for both cases? Of course I
would like something like:
%%{
machine Parser;
[...]
if (dispatcher) {
main := xxxxxxx
}
else {
main := yyyyyyy
}
}%%
Mmm, I think using the "when" statement is the way to go :)
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