[Rcpp-devel] short, unsigned short, long, unsigned long, long double

[Romain Francois]

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__

> | BTW, I am also a recurrent victim of the "before the first cup of
> | coffee" pattern.
>
> I am incoherent and incomprehensible most of the time irrespective of the
> amount of coffee.
>
> Dirk
>


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