On Tue, Apr 6, 2010 at 8:40 AM, Romain Francois <[email protected]> wrote: > Le 06/04/10 15:32, Dirk Eddelbuettel a écrit : >> >> On 6 April 2010 at 14:27, Romain Francois wrote: >> |> Perhaps I am not answering the question that you asked - that sort of >> |> thing happens when answering email while still on the first cup of >> |> coffee. More helpful might be the comments in the limits include file >> |> for libstdc++ on Debian/Ubuntu >> |> >> |> // The numeric_limits<> traits document implementation-defined >> aspects >> |> // of fundamental arithmetic data types (integers and floating >> points). >> |> // From Standard C++ point of view, there are 13 such types: >> |> // * integers >> |> // bool >> (1) >> |> // char, signed char, unsigned char (3) >> |> // short, unsigned short (2) >> |> // int, unsigned (2) >> |> // long, unsigned long >> (2) >> |> // >> |> // * floating points >> |> // float (1) >> |> // double (1) >> |> // long double >> (1) >> |> // >> |> // GNU C++ understands (where supported by the host C-library) >> |> // * integer >> |> // long long, unsigned long long (2) >> |> // >> |> // which brings us to 15 fundamental arithmetic data types in GNU C++. >> |> >> |> So it looks like short is part of standard C++ but not long long. >> | >> | Even better, thanks again. >> >> Not to beat a dead horse (and yours, at that) but the long long and >> unsigned >> long long are hence not portable but GNU g++ dependent. > > I have not touched long long and unsigned long long so we are still in > standard c++. > > If I do them, they will be hidden in #ifdef __GNUC__
What do you plan to do about wrapping a std::vector<long double>? There is no corresponding data type in R. With something like long long you can map to a double which takes most of the range without round-off but a long double will either be truncated by mapping to a double or will need some crafty construction in R. _______________________________________________ Rcpp-devel mailing list [email protected] https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel
