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Fortran 2003 and 2008 features
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PaulLaidler
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Joined: 21 Feb 2005
Posts: 7332
Location: Salford, UK

PostPosted: Sat Aug 06, 2022 8:01 am    Post subject: Reply with quote

Dan

I will add NORM2 to the list of missing features from the 2008 standard.

Regarding afivo-pic, please provide a short working program that illustrates the what is missing from FTN95.
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JohnCampbell



Joined: 16 Feb 2006
Posts: 2394
Location: Sydney

PostPosted: Sat Aug 06, 2022 10:03 am    Post subject: Reply with quote

I am not familiar with the history of NORM2, but I do use a similar RMS function, which I thought was more often used ?
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Kenneth_Smith



Joined: 18 May 2012
Posts: 520
Location: Hamilton, Lanarkshire, Scotland.

PostPosted: Sat Aug 06, 2022 10:21 am    Post subject: Reply with quote

If adding NORM2 to FTN95, then perhaps also consider HYPOT?

hypot(x,y) = sqrt(x*x + y*y) = abs(complex(x,y))
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PaulLaidler
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Joined: 21 Feb 2005
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PostPosted: Sat Aug 06, 2022 1:26 pm    Post subject: Reply with quote

I have added HYPOT to the list.
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DanRRight



Joined: 10 Mar 2008
Posts: 2559
Location: South Pole, Antarctica

PostPosted: Sun Aug 07, 2022 10:29 am    Post subject: Re: Reply with quote

PaulLaidler wrote:
Regarding afivo-pic, please provide a short working program that illustrates the what is missing from FTN95.


Paul,
OK, here is an example of module m_af_types which has no other modules to USE but it has #include "cpp_macros.h". I further simplified both by shortening of them and removing mentioning GFortran there

m_af_types.f90:
Code:
#include "cpp_macros.h"
module m_af_types

  use iso_c_binding, only: c_ptr
  implicit none
  public
  integer, parameter :: dp = kind(0.0d0)

end module m_af_types


cpp_macros.h:
Code:
!#ifdef __GFORTRAN__
!#define PASTE(a) a
!#define CONCAT(a,b) PASTE(a)b
!#else
#define PASTE(a) a ## b
#define CONCAT(a,b) PASTE(a,b)
!#endif

#if NDIM == 1
#define DTIMES(TXT) TXT
#define DINDEX(TXT) TXT(1)
#define DSLICE(lo,hi) lo(1):hi(1)
#define KJI_DO(lo,hi) i = lo, hi
#define CLOSE_DO
#define IJK i
#define IJK_(s) CONCAT(i_,s)
#define DIMNAME "1d"
#elif NDIM == 2
#define DTIMES(TXT) TXT, TXT
#define DINDEX(TXT) TXT(1), TXT(2)
#define DSLICE(lo,hi) lo(1):hi(1), lo(2):hi(2)
#define KJI_DO(lo,hi) j = lo, hi; do i = lo, hi
#define CLOSE_DO end do
#define IJK i, j
#define IJK_(s) CONCAT(i_,s), CONCAT(j_,s)
#define DIMNAME "2d"
#elif NDIM == 3
#define DTIMES(TXT) TXT, TXT, TXT
#define DINDEX(TXT) TXT(1), TXT(2), TXT(3)
#define DSLICE(lo,hi) lo(1):hi(1), lo(2):hi(2), lo(3):hi(3)
#define KJI_DO(lo,hi) k = lo, hi; do j = lo, hi; do i = lo, hi
#define CLOSE_DO end do; end do
#define IJK i, j, k
#define IJK_(s) CONCAT(i_,s), CONCAT(j_,s), CONCAT(k_,s)
#define DIMNAME "3d"
#endif


The compilation (i gather result of compilation in the file Z ):

Code:
 FTN95 m_af_types.f90 /CFPP NDIM 2 >Z


The file Z:
Code:
*** More than one source file specified with names m_af_types.f90 and NDIM

    1 ERROR [m_af_types.f90] - Compilation failed.


Additionally this piece also looks very unusual
Code:
#define PASTE(a) a ## b
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PaulLaidler
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Joined: 21 Feb 2005
Posts: 7332
Location: Salford, UK

PostPosted: Sun Aug 07, 2022 4:13 pm    Post subject: Reply with quote

Dan

Some of the #define's illustrated here are not currently supported by FTN95.

Preprocessing instructions, such as these that are common to the language C, are not Fortran standard conforming.

Our first priority is to add useful features from the 200x Fortran standards that are not currently supported.
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