On Tue, Jun 27, 2017 at 08:43:35PM +0500, Kirill Mishchenko wrote:
> The type of T is
>
> arma::Glue<arma::Op<arma::Gen<arma::Col<double>, arma::gen_zeros>,
> arma::op_htrans>, arma::Op<arma::Gen<arma::Col<double>, arma::gen_zeros>,
> arma::op_htrans>, arma::glue_join_rows>
>
> I guess there should be something wrong with the line
>
> const T& ref = arma::join_rows(arma::zeros(2).t(), arma::zeros(2).t());
>
> since this works fine
>
> template<typename T>
> void f(const T& arg)
> {
> arma::mat m = arg;
> }
>
> BOOST_AUTO_TEST_CASE(RefTest)
> {
> f(arma::join_rows(arma::zeros(2).t(), arma::zeros(2).t()));
> }
Hmm, interesting, I wonder if the instantiation of the Glue<> type
itself causes some problem. Usually I think these types are not
actually instantiated in programs, and they can be entirely optimized
out by the compiler (not always but in many cases I believe this is
true). I suppose it's possible that the instantiation itself is causing
something ugly to happen at runtime, but I don't know if it's worthwhile
to dig that deep. If you want to though, feel free, I would be
interested to see what you find. :)
--
Ryan Curtin | "More like a nonja."
[email protected] | - Pops
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