[ragel-users] Re: syntax improvement, new operators

Adrian Thurston thurs... at cs.queensu.ca
Sat Feb 10 18:09:54 UTC 2007

Hi Erich,

Entering actions are always executed before any other actions which have 
been previously embedded in the machine. In this example sub is 
evaluated and all its actions are embedded. Then the first action is 
embedded, but it goes to the front of any action list it is put in 
because it is a starting action.

action a1 {}
action a2 {}
action first {}

sub = ( 'a' 'b'* ) >a1 $a2;
main := sub >first;


Erich Ocean wrote:
> I find how the current action operators work intuitive, it's the  
> *naming* that I find unintuitive. (Perhaps that should have been  
> changed along with the behavior change in 4.0.)
> It might be worthwhile to add a new machine-level action operator  
> that was always executed before any other action was executed by the  
> machine (we could call it Start), though I don't have any ready use  
> for one.
> Best, Erich

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