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New Contributor II
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Module function interface gives syntax error in XE2017

module Fruit
   integer, parameter :: DP = 8
   interface
      real(DP) module function rasberry() result (ripple)
         implicit none
      end
   end interface
end module

Gives: error #6683: A kind type parameter must be a compile-time constant.   [DP]

If we move the declaration of rippple into the function then it compiles OK.

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Black Belt Retired Employee
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Read this...

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New Contributor II
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Steve, your example is not for a module function, just a plain function.

It achieves nothing and is a syntax error to add "import" to a module function interface.

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Black Belt Retired Employee
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Ok, I missed that. It works when you declare the result separately. I agree that this is a compiler bug, and it is still present in the 18.0 beta.

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Valued Contributor III
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I hate the layout with the type before the function name which is why I have not had this problem ..... But it is clearly legal.

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Beginner
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hi all programmers
please i need a help
i have a project use 5 files "modules", there is no problem when i compile it , but without good results, and i think the problem is in the exchange of tables with this " modules'. so maybe i need to use the "interface"
the question is : it's necessairy to use the " interface " even if i use the " use" statement in the main program ?
when i use a " module " for interfaces , a number of problem appear

module variable
implicit none
………………………………………………..
all the variables that i need in the main program +
type :: atm_indice
sequence
integer::ind1,ind2,ind3,ind4
end type atm_indice

type (atm_indice), dimension(:), ALLOCATABLE :: cell_atm_indice1
………………………………………………………………………….
end module variable
MODULE position
contains
SUBROUTINE init_fcc(a,ncell_x_min,ncell_x_max,ncell_y_min, ncell_y_max,ncell_z_min, ncell_z_max,irefmin,irefmax,St_Summit,St_centre_f,St_centre_c,atype,rxi, ryi, rzi)
implicit none
integer,INTENT(in) ::ncell_x_min,ncell_x_max,ncell_y_min, ncell_y_max,ncell_z_min,& ncell_z_max,irefmin,irefmax
integer :: ix, iy, iz, iref
double precision,intent(in) :: a
character(len=2), INTENT(in) :: St_Summit,St_centre_f,St_centre_c
double precision , dimension(ncell_x_min:ncell_x_max, ncell_y_min:ncell_y_max, ncell_z_min:ncell_z_max, irefmin:irefmax) , INTENT(out) :: rxi, ryi, rzi
double precision , dimension (irefmin:irefmax) :: rx, ry, rz

character(len=2), dimension(ncell_x_min:ncell_x_max, ncell_y_min:ncell_y_max,& ncell_z_min:ncell_z_max, irefmin:irefmax) ,INTENT(out) :: atype

..... other specification statements .....
......... executable statements ..........
return
end SUBROUTINE init_fcc
SUBROUTINE fcc_spin(atype,ncell_x_min,ncell_x_max,ncell_y_min,ncell_y_max,ncell_z_min,ncell_z_max,irefmin,irefmax,St_Summit,St_centre_f,St_centre_c,S_Summit,S_centre_f,S_centre_c,spin)
implicit none
integer, intent(in) :: ncell_x_min,ncell_x_max,ncell_y_min, ncell_y_max,ncell_z_min, ncell_z_max,irefmin,irefmax
character(len=2), INTENT(in) :: St_centre_f,St_Summit,St_centre_c
double precision,intent(in) :: S_Summit,S_centre_f,S_centre_c
character(len=2), dimension(ncell_x_min:ncell_x_max, ncell_y_min:ncell_y_max,& ncell_z_min:ncell_z_max, irefmin:irefmax) , INTENT(in) :: atype
double precision, dimension(ncell_x_min:ncell_x_max, ncell_y_min:ncell_y_max, ncell_z_min:ncell_z_max, irefmin:irefmax),intent(out):: spin
integer:: i,j,k,ir

..... other specification statements .....
......... executable statements ..........

end SUBROUTINE fcc_spin

end MODULE position

module source1
use variable
contains
subroutine atmcont(atype,type_atm,ncell_x_min,ncell_x_max,ncell_y_min,& ncell_y_max,ncell_z_min, ncell_z_max,irefmin, irefmax,nbre_atm)
implicit none
character(len=2),dimension(ncell_x_min:ncell_x_max,ncell_y_min:ncell_y_max,ncell_z_min:ncell_z_max,irefmin:irefmax) , INTENT(in) :: atype
character(len=2) , INTENT(in) ::type_atm
integer,intent(in):: ncell_x_min, ncell_x_max,ncell_y_min, ncell_y_max,ncell_z_min, ncell_z_max,irefmin, irefmax
integer,intent(out)::nbre_atm
integer:: i,j,k,ir

..... other specification statements .....
......... executable statements ..........

end subroutine atmcont

subroutine atmindice(atype,type_atm,ncell_x_min,ncell_x_max,ncell_y_min,& ncell_y_max,ncell_z_min, ncell_z_max,irefmin, irefmax,cell_atm_indice,nbre_atm)
implicit none
integer,intent(in):: ncell_x_min, ncell_x_max,ncell_y_min, ncell_y_max,ncell_z_min, ncell_z_max,irefmin, irefmax
character(len=2) , INTENT(in) ::type_atm
integer,intent(in)::nbre_atm
character(len=2),dimension(ncell_x_min:ncell_x_max,ncell_y_min:ncell_y_max,ncell_z_min:ncell_z_max,irefmin:irefmax) , INTENT(in) :: atype
integer::erreur

type (atm_indice), dimension(nbre_atm), intent(out) :: cell_atm_indice
integer:: i,j,k,ir,ind

..... other specification statements .....
......... executable statements ..........

end subroutine atmindice
end module source1

module read_type
use variable
contains
subroutine read_file(unit)
implicit none
integer,intent(in) :: unit

..... other specification statements .....
......... executable statements ..........
end subroutine read_file

subroutine read_screen(unit)
implicit none
integer,intent(in) :: unit

..... other specification statements .....
......... executable statements ..........

end subroutine read_screen

subroutine write_file(unit)
implicit none
integer,intent(in) :: unit
end subroutine write_file

end module read_type

module dopage_display
use variable
contains
subroutine dopage(atype,spin,type_atm,percent_dop,type_atm_dop,spin_dop,cell_atm_indice,nbre_atm)
implicit none
character(len=2), dimension(:,:,:,:) , INTENT(inout) :: atype
double precision, dimension(:,:,:,:), INTENT(inout) :: spin
character(len=2),intent(in) :: type_atm_dop,type_atm
double precision, INTENT(in) :: spin_dop,percent_dop
integer,intent(in)::nbre_atm
integer:: cn,natm_D1,i,j,k,ir,ii,erreur
double precision:: qdrn1
type (atm_indice),dimension(nbre_atm), intent(in) :: cell_atm_indice

..... other specification statements .....
......... executable statements ..........

end subroutine dopage
end module dopage_display

module interface_source

interface posi
SUBROUTINE init_fcc(a,ncell_x_min,ncell_x_max,ncell_y_min, ncell_y_max,ncell_z_min, ncell_z_max,irefmin,irefmax,St_Summit,St_centre_f,St_centre_c,atype,rxi, ryi, rzi)
integer,INTENT(in) ::ncell_x_min,ncell_x_max,ncell_y_min, ncell_y_max,ncell_z_min, ncell_z_max,irefmin,irefmax
character(len=2), INTENT(in) :: St_Summit,St_centre_f,St_centre_c
double precision,intent(in) :: a
double precision , dimension(ncell_x_min:ncell_x_max, ncell_y_min:ncell_y_max, ncell_z_min:ncell_z_max, irefmin:irefmax) , INTENT(out) :: rxi, ryi, rzi
character(len=2), dimension(ncell_x_min:ncell_x_max, ncell_y_min:ncell_y_max, ncell_z_min:ncell_z_max, irefmin:irefmax) ,INTENT(out) :: atype
end subroutine
end interface posi

interface count
subroutine atmcont(atype,type_atm,ncell_x_min,ncell_x_max,ncell_y_min, ncell_y_max,ncell_z_min, ncell_z_max,irefmin, irefmax,nbre_atm)
character(len=2), dimension(ncell_x_min:ncell_x_max,ncell_y_min:ncell_y_max,ncell_z_min:ncell_z_max,irefmin:irefmax) , INTENT(in) :: atype
character(len=2) , INTENT(in) ::type_atm
integer,intent(in):: ncell_x_min, ncell_x_max,ncell_y_min, ncell_y_max,ncell_z_min, ncell_z_max,irefmin, irefmax
integer,intent(out)::nbre_atm
interface posi
SUBROUTINE init_fcc(a,ncell_x_min,ncell_x_max,ncell_y_min, ncell_y_max,ncell_z_min, ncell_z_max,irefmin,irefmax,St_Summit,St_centre_f,St_centre_c,atype,rxi, ryi, rzi)
integer,INTENT(in) ::ncell_x_min,ncell_x_max,ncell_y_min, ncell_y_max,ncell_z_min, ncell_z_max,irefmin,irefmax
character(len=2), INTENT(in) :: St_Summit,St_centre_f,St_centre_c
double precision,intent(in) :: a
double precision , dimension(ncell_x_min:ncell_x_max, ncell_y_min:ncell_y_max, ncell_z_min:ncell_z_max, irefmin:irefmax) , INTENT(out) :: rxi, ryi, rzi
character(len=2), dimension(ncell_x_min:ncell_x_max, ncell_y_min:ncell_y_max, ncell_z_min:ncell_z_max, irefmin:irefmax) ,INTENT(out) :: atype
end subroutine
end interface posi
end subroutine
end interface count

interface spincnofig
SUBROUTINE fcc_spin(atype,ncell_x_min,ncell_x_max,ncell_y_min, ncell_y_max,ncell_z_min, ncell_z_max,irefmin,irefmax,St_Summit,St_centre_f,St_centre_c,S_Summit,S_centre_f,S_centre_c,spin)
integer, intent(in) :: ncell_x_min,ncell_x_max,ncell_y_min, ncell_y_max,ncell_z_min, ncell_z_max,irefmin,irefmax
character(len=2), INTENT(in) :: St_centre_f,St_Summit,St_centre_c
double precision,intent(in) :: S_Summit,S_centre_f,S_centre_c
character(len=2), dimension(ncell_x_min:ncell_x_max, ncell_y_min:ncell_y_max, ncell_z_min:ncell_z_max, irefmin:irefmax) , INTENT(in) :: atype
double precision, dimension(ncell_x_min:ncell_x_max, ncell_y_min:ncell_y_max, ncell_z_min:ncell_z_max, irefmin:irefmax),intent(out):: spin
interface posi
SUBROUTINE init_fcc(a,ncell_x_min,ncell_x_max,ncell_y_min, ncell_y_max,ncell_z_min, ncell_z_max,irefmin,irefmax,St_Summit,St_centre_f,St_centre_c,atype,rxi, ryi, rzi)
integer,INTENT(in) ::ncell_x_min,ncell_x_max,ncell_y_min, ncell_y_max,ncell_z_min, ncell_z_max,irefmin,irefmax
character(len=2), INTENT(in) :: St_Summit,St_centre_f,St_centre_c
double precision,intent(in) :: a
double precision , dimension(ncell_x_min:ncell_x_max, ncell_y_min:ncell_y_max, ncell_z_min:ncell_z_max, irefmin:irefmax) , INTENT(out) :: rxi, ryi, rzi
character(len=2), dimension(ncell_x_min:ncell_x_max, ncell_y_min:ncell_y_max, ncell_z_min:ncell_z_max, irefmin:irefmax) ,INTENT(out) :: atype
end subroutine
end interface posi
end subroutine
end interface spincnofig
end module interface_source

the main program :

program simulation
use variable
use read_type
use position
use dopage_display
use source1
use interface_source
implicit none
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!allocation variables!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
allocate ( angle_t1( ncell_x_min1:ncell_x_max1,ncell_y_min1:ncell_y_max1,ncell_z_min1:ncell_z_max1,irefmin1:irefmax1 ) ,&
angle_p1( ncell_x_min1:ncell_x_max1,ncell_y_min1:ncell_y_max1,ncell_z_min1:ncell_z_max1,irefmin1:irefmax1 ), stat=erreur )
IF(erreur /= 0 ) THEN
WRITE(*,*) "erreur allocation angle "
STOP
END IF
allocate ( itype1( ncell_x_min1:ncell_x_max1,ncell_y_min1:ncell_y_max1,ncell_z_min1:ncell_z_max1,irefmin1:irefmax1 ) , stat=erreur )
IF(erreur /= 0 ) THEN
WRITE(*,*) "erreur allocation itype1 "
STOP
END IF

allocate ( spin1( ncell_x_min1:ncell_x_max1,ncell_y_min1:ncell_y_max1,ncell_z_min1:ncell_z_max1,irefmin1:irefmax1 ) , stat=erreur )
IF(erreur /= 0 ) THEN
WRITE(*,*) "erreur allocation spin1"
STOP
END IF

allocate ( spin2( ncell_x_min1:ncell_x_max1,ncell_y_min1:ncell_y_max1,ncell_z_min1:ncell_z_max1,irefmin1:irefmax1 ) , stat=erreur )
IF(erreur /= 0 ) THEN
WRITE(*,*) "erreur allocation spin2"
STOP
END IF
allocate ( rxi1( ncell_x_min1:ncell_x_max1,ncell_y_min1:ncell_y_max1,ncell_z_min1:ncell_z_max1,irefmin1:irefmax1 ),&
ryi1( ncell_x_min1:ncell_x_max1,ncell_y_min1:ncell_y_max1,ncell_z_min1:ncell_z_max1,irefmin1:irefmax1 ),&
rzi1( ncell_x_min1:ncell_x_max1,ncell_y_min1:ncell_y_max1,ncell_z_min1:ncell_z_max1,irefmin1:irefmax1 ) , stat=erreur )
IF(erreur /= 0 ) THEN
WRITE(*,*) "erreur allocation rxi1,ryi1,rzi1"
STOP
END IF
allocate ( atype1( ncell_x_min1:ncell_x_max1,ncell_y_min1:ncell_y_max1,ncell_z_min1:ncell_z_max1,irefmin1:irefmax1 ) , stat=erreur )
IF(erreur /= 0 ) THEN
WRITE(*,*) "erreur allocation atype1 "
STOP
END IF

..... other specification statements .....
......... executable statements ..........

call init_fcc(a1,ncell_x_min1,ncell_x_max1,ncell_y_min1, ncell_y_max1,ncell_z_min1, ncell_z_max1,irefmin1,irefmax1,St_Summit1,St_centre_f1,St_centre_c1,atype1, rxi1, ryi1, rzi1)

call init_fcc(a1,ncell_x_min2,ncell_x_max2,ncell_y_min2, ncell_y_max2,ncell_z_min2, ncell_z_max2,irefmin1,irefmax1,St_Summit1,St_centre_f1,St_centre_c1,atype2, rxi1, ryi1, rzi1)

call fcc_spin(atype1,ncell_x_min1,ncell_x_max1,ncell_y_min1, ncell_y_max1,ncell_z_min1, ncell_z_max1,irefmin1,irefmax1,St_Summit1,St_centre_f1,St_centre_c1,S_Summit1,S_centre_f1,S_centre_c1,spin1)

call fcc_spin(atype2,ncell_x_min2,ncell_x_max2,ncell_y_min2, ncell_y_max2,ncell_z_min2, ncell_z_max2,irefmin1,irefmax1,St_Summit1,St_centre_f1,St_centre_c1,S_Summit1,S_centre_f1,S_centre_c1,spin2)

call atmcont(atype2,type_atm1,ncell_x_min2,ncell_x_max2,ncell_y_min2, ncell_y_max2,ncell_z_min2, ncell_z_max2,irefmin1, irefmax1,nbre_atm_s)
allocate ( cell_atm_indice1(nbre_atm_s) , stat=erreur )
IF(erreur /= 0 ) THEN
WRITE(*,*) "erreur allocation cell_atm_indice 1"
STOP
END IF

call atmindice(atype2,type_atm1,ncell_x_min2,ncell_x_max2,ncell_y_min2, ncell_y_max2,ncell_z_min2, ncell_z_max2,irefmin1, irefmax1,cell_atm_indice1,nbre_atm_s)

call dopage(atype2,spin2,type_atm1,percent_dop1,type_atm_dop1,spin_dop1,cell_atm_indice1,nbre_atm_s)

deallocate(cell_atm_indice1)

..... other specification statements .....
......... executable statements ..........

deallocate(itype1,spin1,teta1,phi1,dEn1,angle_t1,angle_p1,rxi1,ryi1,rzi1,atype1)
end program simulation

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Valued Contributor III
15 Views

when you have a MODULE the interfaces for any CONTAINed subroutines/functions are automatically created and made available in other places by the USE statement. The interfaces will cause and error because it is defining the same thing 2 times. You may be confused with the SUBMODULE feature where you do need to create interfaces. I suggest you read some fortran text book on this. 

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Moderator
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