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Hola Mark,
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<div>I'm not clear on what your objective with this example is, but if I'm right in assuming that your trying to write a growth function that is robust to the permutations of the different arguments, then you might be better of writing a class template. With
a class you can overload the constructor such that a number of different combinations could be accommodated.</div>
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<div>Steve<br>
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<div>On Jul 19, 2014, at 10:18 AM, dave fournier <<a href="mailto:davef@otter-rsch.com">davef@otter-rsch.com</a>> wrote:</div>
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<div class="moz-cite-prefix">On 07/14/2014 01:02 PM, Mark Maunder wrote:<br>
<br>
Hi,<br>
<br>
I think you are confusing two things here. One is to have a single function vonB<br>
which acts on different types in the same way. In this case the code needs to depend on the types.<br>
<br>
Note that in your code it is assumed that age is a vector<br>
<br>
inline<br>
typename Growthvectortrait<T>::GrowthvectorT vonBertalanffy(const T &Linf, const T &K, const T &t0, const T1 &age)<br>
{<br>
typedef typename Growthvectortrait<T>::GrowthvectorT vonBT;<br>
<br>
vonBT len;<br>
cout << "HERE" << endl;<br>
<br>
len.allocate(age.indexmin(),age.indexmax());<br>
len.initialize();<br>
<br>
for(int i = len.indexmin(); i <= len.indexmax(); i++ )<br>
{<br>
len(i) = Linf*(1.-mfexp(-K*(age(i)-t0)));<br>
}<br>
return len;<br>
}<br>
<br>
I think you have to specialize for when age is a number like this.<br>
<br>
template <typename T><br>
inline<br>
dvariable vonBertalanffy(const T &Linf, const T &K, const T &t0, double &age)<br>
{<br>
<br>
dvariable len;<br>
cout << "HERE1" << endl;<br>
len = Linf*(1.-mfexp(-K*(age-t0)));<br>
return len;<br>
}<br>
<br>
The original traits examples were for doing the same thing to the passed objects on the<br>
generated code level. So I'm not exactly sure what yoiu are trying to accomplish here.<br>
<br>
I have attached my code which compiles and runs for what its worth.<br>
<br>
Dave<br>
<br>
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Hi,</div>
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<div style="margin:0in 0in 0.0001pt; font-size:11pt; font-family:Calibri,sans-serif">
I am working on using traits for growth functions. Steve provided me some example code and I have been trying to extend it. This looks like it uses templates inside templates and gets confusing. Attached is some example code and I would appreciate any help
on debugging it. I think the problem is that for the same function parameter types I have two different return types, so I made two different traits. I think it is important to get this sorted out because it may be something we will use often in creating libraries
of functions.</div>
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Thanks,</div>
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<div style="margin:0in 0in 0.0001pt; font-size:11pt; font-family:Calibri,sans-serif">
Mark</div>
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</div>
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</div>
<div style="margin:0in 0in 0.0001pt; font-size:11pt; font-family:Calibri,sans-serif">
The selectivity<span class="Apple-converted-space"> </span><span style="">special issue of the journal Fisheries Research is now published</span></div>
<div style="margin:0in 0in 0.0001pt; font-size:11pt; font-family:Calibri,sans-serif">
<a href="http://www.sciencedirect.com/science/journal/01657836/158/supp/C" style="color:purple; text-decoration:underline"><span style="color:blue">http://www.sciencedirect.com/science/journal/01657836/158/supp/C</span></a></div>
<div style="margin:0in 0in 0.0001pt; font-size:11pt; font-family:Calibri,sans-serif">
</div>
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</div>
<p class="MsoNormal" style="margin:0in 0in 6pt; font-size:11pt; font-family:Calibri,sans-serif; background-color:white">
<span style="">The Stock Synthesis special issue of the journal Fisheries Research</span></p>
<p class="MsoNormal" style="margin:0in 0in 6pt; font-size:11pt; font-family:Calibri,sans-serif; background-color:white">
<span style=""><a href="http://www.sciencedirect.com/science/journal/01657836/142" style="color:purple; text-decoration:underline"><span style="color:blue">http://www.sciencedirect.com/science/journal/01657836/142</span></a></span></p>
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</div>
<div style="margin:0in 0in 0.0001pt; font-size:11pt; font-family:Calibri,sans-serif">
Mark Maunder </div>
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Head of the Stock Assessment Program </div>
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<span lang="ES-PE">Inter-American Tropical Tuna Commission </span></div>
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Tel: (858) 546-7027</div>
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Fax: (858) 546-7133</div>
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<a href="http://www.fisheriesstockassessment.com/TikiWiki/tiki-index.php?page=Mark+Maunder" style="color:purple; text-decoration:underline"><span style="color:blue">http://www.fisheriesstockassessment.com/TikiWiki/tiki-index.php?page=Mark+Maunder</span></a></div>
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Visit the Center for the Advancement of Population Assessment Methodology at</div>
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<a href="http://www.capamresearch.org/" style="color:purple; text-decoration:underline"><span style="color:blue">http://www.capamresearch.org/</span></a></div>
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Visit the AD Model Builder project at</div>
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<a href="http://admb-project.org/" style="color:purple; text-decoration:underline"><span style="color:blue">http://admb-project.org/</span></a></div>
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See the following website for information on fisheries stock assessment<a href="http://www.fisheriesstockassessment.com/" style="color:purple; text-decoration:underline"><span style="color:blue">http://www.fisheriesstockassessment.com/</span></a></div>
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