where functions go:

[Bob Carpenter]

I added a note to the function implementation page explaining
where to put function imlementation files:

https://github.com/stan-dev/stan/wiki/Contributing-New-Functions-to-Stan

- Bob

P.S. Here's what I added:


Directories for code
--------------------

In general, implementations should go int the lowest directory possible, subject to the orderings

scal < arr < mat

prim < rev < mix;

prim < fwd < mix;

If the left-hand type occurs, the directory has to be at least the minimum on the right

Code includes directory must be at least
------------- --------------------------
Eigen::Matrix mat
std::vector arr
stan::math::rev rev
stan::math::fwd fwd

Everything else follows from these two rules. The directories are laid out two deep, with

(prim | fwd | rev | mix) / (scal | arr | mat)

...

Depending on where you put the function (see the rules above), you'll need to include its definition file in the appropriate header include to make sure it's visible to models. For instance, if the function is going into `stan/math/rev/arr/foo.hpp` then `#include <stan/math/rev/arr/foo.hpp>` should be included added to `stan/math/rev/arr.hpp`.

[Krzysztof Sakrejda]

Thanks. Very helpful to have it laid out!.

[Daniel Lee]

Thanks, Bob!

Daniel

On Mon, Aug 8, 2016 at 3:46 PM, Krzysztof Sakrejda <krzysztof...@gmail.com> wrote:

Thanks. Very helpful to have it laid out!.

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