[Gretl-devel] Proposal for a syntax change

[Riccardo (Jack) Lucchetti]

On Tue, 27 May 2008, Riccardo (Jack) Lucchetti wrote:

>
> Hi all,
>
> since release is near, I feel it may be a good time to propose a 
> backward-incompatible change that IMHO sooner or later we'll have to make: 
> originally, we had "|" and "&" for logical operations. Then, when matrices 
> appeared, we used the same operators for concatenation (mostly, because 
> that's what everybody else uses). At the same time, we also support "||" and 
> "&&" for logical operators. This, I think, creates an ugly ambiguity which 
> should be resolved by specialising "|"-"~" for concatenation and "||"-"&&" 
> for logical operations.

Sorry to reply to myself, but by re-reading my own message perhaps it's 
not clear that the ambiguity is only about "|" vs "||". However, for 
consistency, "&" should be banned in favour of "&&".


Riccardo (Jack) Lucchetti
Dipartimento di Economia
Università Politecnica delle Marche

r.lucchetti at univpm.it
http://www.econ.univpm.it/lucchetti