Re: [Quantlib-dev] Running into problem with R-Swig wrappers

[Duncan T. L. <du...@wa...>]

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Can you show us some of the overloaded functions, please?
I don't know what you mean by a "large" number of arguments
and why you are generating functions with a large number of
parameters so it would be helpful to see what you are generating.

 D.

Joseph Wang wrote:
> The problem I'm running into is that an overloaded r function with large 
> numbers of arguments seem to be eating up huge amounts of memory, causing my 
> 512 meg machine to run out of free memory before loading the wrapper.  
> 
> The trouble is that the functions with large numbers of option arguments 
> generate r overloaded functions.  
> 
> One way I've been able to get things to work is by defining 
> 
> #if defined(SWIGR)
> #define OPTIONAL(x, y) x
> #else
> #define OPTIONAL(x, y) x = y
> #endif
> 
> and then
> 
>         ParCouponPtr(Real nominal, const Date& paymentDate,
>                      const XiborPtr& index,
>                      const Date& startDate, const Date& endDate,
>                      Integer fixingDays,
>                      OPTIONAL(Spread spread, 0.0),
>                      OPTIONAL(const Date& refPeriodStart, Date()),
>                      OPTIONAL(const Date& refPeriodEnd, Date())
> 
> This forces R to remove the optional arguments, which means that R no longer 
> uses overloading to represent these long functions, which bypasses the memory 
> bloating.
> 
> I've e-mailed the r-help list for any suggestions to get around the memory 
> bloat.
> 
> I'm curious if anyone has any other ideas on how to handle this.  One thing 
> that might be possible is to turn off operator overloading in R-SWIG if there 
> are more than six arguments, and then to use a herustic to figure out which 
> method to generate a wrapper for.
> 
> Thoughts?

- --
Duncan Temple Lang                    du...@wa...
Department of Statistics              work:  (530) 752-4782
4210 Mathematical Sciences Building   fax:   (530) 752-7099
One Shields Ave.
University of California at Davis
Davis,
CA 95616,
USA
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