Re: GCC Decimal128 class

[Jonathan Wakely <jwakely.gcc@gmail.com>]

On Tue, 23 Jan 2024 at 02:01, Ming Cheng via Gcc <gcc@gcc.gnu.org> wrote:
>
> Hi GCC,
>
> Seems Janis is not at IBM. Wondering someone from GCC can help my question?
>
> Thanks
> Ming.
>
> From: Ming Cheng
> Sent: Monday, January 22, 2024 3:18 PM
> To: janis187@us.ibm.com
> Subject: GCC Decimal128 class
>
> Hi Janis Johnson,
>
> I want to test GCC Decimal128 class.
>
> This is my code:
>
> #include <stdio.h>
> #include <cstdlib>
> #include <vector>
> #include <algorithm>
> #include <ctime>
> #include <random>
> #include <string>
> #include <fstream>
> #include <fenv.h>
> #include "decimal/decimal.h"
>
> int main (void)
> {
>     std::decimal::decimal128 d128{};
>     return 0;
> }
>
> When I compile by c++23 (/opt/rh/gcc-toolset-13/root/bin/g++ -rdynamic -std=c++23  -O2 ......)
> I got this error:
>
> /opt/rh/gcc-toolset-13/root/usr/include/c++/13/decimal/decimal.h:46:10: error: 'decimal32' does not name a type
>    46 |   inline decimal32::decimal32(decimal64 __r)    : __val(__r.__getval()) {}
>
> I checked /opt/rh/gcc-toolset-13/root/usr/include/c++/13/decimal/decimal.h and found this comments:
>
> /** @file decimal/decimal.h
> *  This is an internal header file, included by other library headers.
> *  Do not attempt to use it directly. @headername{decimal}
> */
>
> Wondering whether you can give some advice?


Like it says, you don't include <decimal/decimal.h>

You want <decimal/decimal> instead. That works fine.