In the lme4a package I mixed calls to Rf_error and throwing C++
exceptions. This is causing problems and I plan to replace the calls
to Rf_error by exceptions so that there is a consistent approach.
Many of the calls to Rf_error take advantage of the fact the Rf_error
implicitly calls sprintf to create the error message. Thus I have
calls like
if (!d_x.size() == d_nrow * d_ncol)
::Rf_error("%s: Dim = (%d, %d) is inconsistent with x.size() = %d",
"ddenseMatrix::ddenseMatrix", d_nrow, d_ncol,
d_x.size());
Is there a similar idiom for creating an exception's "what" argument?
I imagine I could add std::strings and maybe use some iostreams or
something like that ...
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