[Rd] "warning: assignment discards qualifiers from pointer target type"

From: oliver <oliver_at_first.in-berlin.de>
Date: Tue, 07 Jun 2011 15:08:54 +0200


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) );

        default:     error("filename argument must be a string");


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?



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https://stat.ethz.ch/mailman/listinfo/r-devel Received on Tue 07 Jun 2011 - 13:21:15 GMT

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