[antlr-interest] Antlr v4 - C++ target

[Ruslan Zasukhin]

On 1/24/12 7:38 PM, "Gokulakannan Somasundaram" <gokul007 at gmail.com> wrote:

> 
> Don't know why you even mention compile time ...
> 
> RUNTIME time -- the only thing to worry about   :-)
> 
> 
>  Hmm... then why do you object to templates? Template Meta programming costs
> compile time, but will produce code that can be optimized by a compiler.

One of the best reasons have give you Ivan:

* some C++ compilers still have bugs about templates

* really huge grammars can catch limit of recursion

And so on. 

Problem not in design itself. Templates can be beauty.
Problems can be later


> Virtual functions/ Function pointers provide a run time indirection, which
> cannot be optimized by a C++ compiler, so something like method inlining
> cannot be achieved there( as compiler doesn't have that info)

Yes, right.

I understand that you want even avoid virtual calls
using traits  ... 

 
> Compile Time is important for large project, as a developer will get
> frustrated with long compile times. I grew frustrated with Boost Spirit for
> the same reason. But i have high regards for the rest of the Boost library.

Well, may be I have not see that ...
May be templates can take much longer than we are used ...

As I told we avoid templates in our projects. We prefer to use COM-like
models based on interfaces.


-- 
Best regards,

Ruslan Zasukhin
VP Engineering and New Technology
Paradigma Software, Inc

Valentina - Joining Worlds of Information
http://www.paradigmasoft.com

[I feel the need: the need for speed]