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Hi Matt, > How does one query if a var is in a record using C++?? There does not > appear to be a call in the .hh file?? In addition, why does the c++ > interface not use exceptions but rather dies a horrible death?? Is > there any plans to implament exception handling?? The NcFile method NcVar* get_var( NcToken ) const; // variable by name returns a null pointer for nonexistent variables. If you don't check that the return value is non-null before using it, the same horrible death that happens whenever a null pointer is dereferenced can be expected. The C++ interface was developed before standard conforming implementations of exceptions and templates were widely available, so it doesn't make use of them. This interface is still being minimally maintained in the sense that we fix bugs that are reported (some C++ fixes are in the current netcdf-3.5.1-beta10 release) and make sure our simple C++ test works on new platforms. The C++ interface is just a thin layer on top of the C interface, so it benefits from the maturity of the C software. However, we're not actively developing or enhancing the C++ interface. It could use some updating with use of templates and exceptions. It's still not as widely used as the C, Java, and Fortran interfaces, and no extensive test set has been developed for it. There are alternatives for C++ users, though I don't think these use exceptions either. Dave Pierce has developed a set of wrappers over the existing C++ interface that improves provides some additional functionality. See http://www.unidata.ucar.edu/cgi-bin/msgout?/glimpse/netcdfgroup-list/1459 Charlie Zender has developed an alternate C++ interface for netCDF, libnco_c++, that you may want to look at. It comes with the CVS version of his NCO software: http://www.unidata.ucar.edu/cgi-bin/msgout?/glimpse/netcdfgroup-list/1484 --Russ _____________________________________________________________________ Russ Rew UCAR Unidata Program russ@xxxxxxxxxxxxxxxx http://www.unidata.ucar.edu
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