[Developers] libraries of functions

Tue Aug 12 07:44:01 PDT 2014

Regarding Mark's Richardson function: should the interior of the function
be "sandwiched" between RETURN_ARRAYS_INCREMENT and RETURN_ARRAYS_DECREMENT
macros because the function creates and returns a dvariable?

Buck Stockhausen

***************************************************
* Dr. William T. Stockhausen                      *
***************************************************
* Resource Ecology and Fisheries Management       *
* Alaska Fisheries Science Center                 *
* National Marine Fisheries Service               *
* National Oceanic and Atmospheric Administration *
* 7600 Sand Point Way N.E.                        *
* Seattle, Washington 98115-6349                  *
***************************************************
* email: William.Stockhausen at noaa.gov             *
* voice: 206-526-4241 fax: 206-526-6723           *
* web  : http://www.afsc.noaa.gov                 *
***************************************************
All models are wrong, some are useful.--G.E.P. Box
Beware of geeks bearing equations.    --W. Buffett
***************************************************
Disclaimer: The opinions expressed above are personal
and do not necessarily reflect official NOAA policy.

On Mon, Aug 11, 2014 at 4:26 PM, John Sibert <johnrsibert at gmail.com> wrote:

> The message is caused because the compiler does not know anything about
> class model_parameters, as would be the case if #include<CAPAM_Growth.hpp>
> were included in the GLOBALS_SECTION of a tpl file.
>
> If I read your function correctly, there is no need for Richards(...) to
> be a member of the model_parameters class. All of the required variables
> are passed as arguments. So I would suggest simply making it a global
> function.
> dvariable Richards(const dvariable &age, const dvariable &Linf, const
> dvariable &K, const dvariable &t0, const dvariable &p)
>
> If you want to be a more restrictive (and perhaps a bit safer in case
> there is some other function with the same protoype), you might consider
> using a namespace. For instance
> namespace CAPAM
> {
>    dvariable Richards(const dvariable &age, const dvariable &Linf, const
> dvariable &K,   const dvariable &t0, const dvariable &p)
>    {
>
>    }
>
> }
>
> To invoke it your could call
> dvariable y = CAPAM::Richards(...)
>
> Or insert a using statement in the GLOBALS_SECTION of your tpl like
> using namesapce CAPAM;
>
> and simply call the function without the namespace qualifier.
>  dvariable y = Richards(...)
>
> The innertube has information on the use of namespace.
> http://www.cplusplus.com/doc/tutorial/namespaces/
>
>
>
> On 08/11/2014 12:49 PM, Mark Maunder wrote:
>
>>
>> Why do I get an error if I put the following function in the file
>> CAPAM_Growth.hpp and include it using #include<CAPAM_Growth.hpp> but if I
>> put it in the tpl using the FUNCTION section I do not? The translator
>> appears to just put it in the cpp with no changes
>>
>> dvariable model_parameters::Richards(const dvariable &age, const
>> dvariable &Linf, const dvariable &K, const dvariable &t0, const dvariable
>> &p)
>>
>> {
>>
>>   {
>>
>>     dvariable Length=Linf*pow((1+(1/p)*exp(-K*(age-t0))),-p);
>>
>>     return(Length);
>>
>>   }
>>
>> }
>>
>> The errors I get are
>>
>> In file included from igm.cpp:3:0:
>>
>> ./CAPAM_Growth.hpp:130:142: error: invalid use of incomplete type 'struct
>> model_parameters'
>>
>> c:/ADMB/admb101-gcc452-win32\include/admodel.h:107:9: error: forward
>> declaration of 'struct model_parameters'
>>
>> igm.cpp: In member function 'virtual void model_parameters::
>> userfunction()':
>>
>> igm.cpp:127:46: error: no matching function for call to
>> 'Richards(prevariable, named_dvariable&, named_dvariable&,
>> param_init_number&, named_dvariable&)'
>>
>> igm.cpp:128:58: error: no matching function for call to
>> 'Richards(prevariable&, named_dvariable&, named_dvariable&,
>> param_init_number&, named_dvariable&)'
>>
>> igm.cpp:139:49: error: no matching function for call to
>> 'Richards(double&, named_dvariable&, named_dvariable&, param_init_number&,
>> named_dvariable&)'
>>
>> The selectivity special issue of the journal Fisheries Research is now
>> published
>>
>> http://www.sciencedirect.com/science/journal/01657836/158/supp/C
>>
>> The Stock Synthesis special issue of the journal Fisheries Research
>>
>> http://www.sciencedirect.com/science/journal/01657836/142
>>
>> Mark Maunder
>>
>> Head of the Stock Assessment Program
>>
>> Inter-American  Tropical Tuna Commission
>>
>> 8901 La Jolla Shores Dr.
>>
>> La Jolla, CA  92037-1508, USA
>>
>> Tel: (858) 546-7027
>>
>> Fax: (858) 546-7133
>>
>> mmaunder at iattc.org <mailto:mmaunder at iattc.org>
>>
>>
>> http://www.fisheriesstockassessment.com/TikiWiki/tiki-index.php?page=
>> Mark+Maunder
>>
>> Visit the Center for the Advancement of Population Assessment Methodology
>> at
>>
>> http://www.capamresearch.org/
>>
>> Visit the AD Model Builder project at
>>
>> http://admb-project.org/
>>
>> See the following website for information on fisheries stock assessment
>> http://www.fisheriesstockassessment.com/
>>
>> --
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>
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