oct2mat script based on parse tree

[Muthiah Annamalai]

> John W. Eaton wrote:
>   
>> On  9-Jan-2008, Muthiah Annamalai wrote:
>>
>> | John W. Eaton wrote:
>> | > On  9-Jan-2008, Muthiah Annamalai wrote:
>> | >
>> | > | we have some
>> | > | issues,like I didnt have boolean expressions involving strings folded 
>> | > | over.
>> | >
>> | > I don't understand what you mean by that.
>> | >
>> | > jwe
>> | >   
>> | This is the boolean exp -> const , folding I was talking about.
>>
>> OK.  I suppose it would be useful to have an option to turn off any
>> optimizations that happen in the parser.  It should be easy to do, and
>> I see that as independent of your tree walking code.
>>
>> jwe
>>
>>   
>>     
> I have attached a patch to allow conditional tree folding.
> It works using the global variable
>
> bool parser_folding_and_optimization_flag;
>
> which user must push onto unwind stack, and use
> the accessor functions
>
> parser_enable/disable_optimization()
>
> and query by
>
> parser_require_optimization()
>
> I have one problem however, the various symbols are not exported,
> and I think it maybe due to a clock-skew in my box, which I cannot fix.
> So I hope this patch is correct. Waiting for my build to complete.
> The changes are correct syntactic/semantically however.
>   
I can confirm the patch works as expected. The clock-skew
was the culprit.
-Muthu