‘class ens::Any’ has no member named ‘As’ about mlpack HOT 2 CLOSED

@flyingkukri Based on a quick look, the error may stem from a define/macro conflict. I suspect there may be a #define As somewhere within your codebase, along these lines of `#define As cl_as_aux".

It may be possible to counteract this by undefining the As macro before including mlpack.hpp and ensmallen.hpp
Please try the following:

#undef As
#undef Any
#include <mlpack.hpp> 

from mlpack.

@flyingkukri The bug seems to be caused by Class Library for Numbers - CLN (https://www.ginac.de/CLN/), which is probably included (directly or indirectly) within your project.

See lines 269 and 274 in the following file, which define a macro named As
https://www.ginac.de/CLN/cln.git/?p=cln.git;a=blob;f=include/cln/number.h;h=67f68899a6926eca49722f012d0a20d159162c57;hb=HEAD#l269

I suggest filing a bug report with the developers of CLN. It's strongly recommended that all macros have a unique prefix, in order to avoid clashes like this. For example, the macro "As" should be defined as "CLN_As".

Alternatively, CLN should clean up after itself, so that all internal macros are undefined at the last point. In other words, there should be an #undef As as the last thing done within the CLN header files.

from mlpack.