Hello,
following an advice here from the list I looked into sources of other
packages (xts) and found the TYPEOF() macro/function, which really is
helpful.
I iused the follwong code snippet:
switch( TYPEOF( filename_sexp ) )
{
case STRSXP: filename = CHAR( STRING_ELT(filename_sexp, 0) );
break;
default: error("filename argument must be a string");
break;
}
Here, filename is of type char*
and one function opens a file with that name.
So it is purely intended to just grab out the char* from the
String-Expression.
Am I doing something wrong here, or is it ok, but I have somehow
to say the extracting macros/functions, that it is really intended
to throw away information and that a warning is not necessary?
Ciao,
Oliver
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