overloaded subroutine of a type in a submodul

[Julian_H_]

In a previous thread I asked for help because of a circular depenendy. I solved it by using submodules. Now I want to have a type bound overloaded subroutine in a submodul.

Current status which is working fine

PROJECT.f90

MODULE mProject
	IMPLICIT NONE
	PRIVATE
	
	PUBLIC :: tElement
	
	TYPE tElement
	CONTAINS
		PROCEDURE, PUBLIC :: other_subroutine => other_subroutine_element
	END TYPE tElement
  
	INTERFACE
		MODULE SUBROUTINE other_subroutine_element(this)
			IMPLICIT NONE
			CLASS(tElement), INTENT(INOUT) :: this
		END SUBROUTINE other_subroutine_element
	END INTERFACE
END MODULE mProject

ELMENT.f90

SUBMODULE (mProject) mElements
	IMPLICIT NONE

CONTAINS
	MODULE SUBROUTINE other_subroutine_element(this)
		IMPLICIT NONE
		CLASS(tElement), INTENT(INOUT) :: this
		! doing smth here
	END SUBROUTINE other_subroutine_element

END SUBMODULE

Now I want to add to tElement a overloaded type bound subroutine. How do i do that

MODULE mProject
	IMPLICIT NONE
	PRIVATE
	
	PUBLIC :: tElement
	
	TYPE tElement
	CONTAINS
		PROCEDURE, PUBLIC :: overloaded_subroutine => overloaded_subroutine_element
		PROCEDURE, PUBLIC :: other_subroutine => other_subroutine_element
	END TYPE tElement
  
	INTERFACE overloaded_subroutine_element
		MODULE PROCEDURE overloaded_sub1
		MODULE PROCEDURE overloaded_sub2
	END INTERFACE overloaded_subroutine_element
	
	INTERFACE
		MODULE SUBROUTINE other_subroutine_element(this)
			IMPLICIT NONE
			CLASS(tElement), INTENT(INOUT) :: this
		END SUBROUTINE other_subroutine_element
	
		MODULE SUBROUTINE overloaded_sub1(this, int)
			IMPLICIT NONE
			CLASS(tElement), INTENT(INOUT) :: this
			INTEGER(4), INTENT(IN) :: int
		END SUBROUTINE overloaded_sub1
	
		MODULE SUBROUTINE overloaded_sub2(this, real)
			IMPLICIT NONE
			CLASS(tElement), INTENT(INOUT) :: this
			REAL(8), INTENT(IN) :: real
		END SUBROUTINE overloaded_sub2
	END INTERFACE
END MODULE mProject

and for ELEMENT.f90

SUBMODULE (mProject) mElements
	IMPLICIT NONE

CONTAINS
	MODULE SUBROUTINE other_subroutine_element(this)
		IMPLICIT NONE
		CLASS(tElement), INTENT(INOUT) :: this
		! doing smth here
	END SUBROUTINE other_subroutine_element
	
	MODULE SUBROUTINE overloaded_sub1(this, int)
		IMPLICIT NONE
		CLASS(tElement), INTENT(INOUT) :: this
		INTEGER(4), INTENT(IN) :: int
		! doing smth here
	END SUBROUTINE overloaded_sub1
	
	MODULE SUBROUTINE overloaded_sub2(this, real)
		IMPLICIT NONE
		CLASS(tElement), INTENT(INOUT) :: this
		REAL(8), INTENT(IN) :: real
		! doing smth here
	END SUBROUTINE overloaded_sub2
END SUBMODULE

unfortunately this is not how its working.

PROJECT.f90(9): error #8182: The name is neither an abstract interface nor a procedure with an explicit interface.   [OVERLOADED_SUBROUTINE_ELEMENT]

PROJECT.f90(9): error #8258: The procedure name in a type-bound procedure declaration should be the name of an accessible module procedure or an external procedure that has an explicit interface.   [OVERLOADED_SUBROUTINE_ELEMENT]

Someone has any thoughts on this?

[FortranFan]

Julian wrote:

.. Now I want to add to tElement a overloaded type bound subroutine. How do i do that ..

Add a GENERIC  binding to your type, as shown below:

module mProject

   implicit none

   private

   public :: tElement

   type tElement
   contains
      private  ! <-- Look into this, consider making this the default
      procedure, pass(this) :: overloaded_sub1 !<-- suggestion: explicitly declare the PASS attribute
      procedure, pass(this) :: overloaded_sub2
      procedure, pass(this), public :: other_subroutine => other_subroutine_element
      generic, public :: overloaded_subroutine_element => overloaded_sub1, overloaded_sub2 !<-- overloading
   end type tElement

   interface
      module subroutine other_subroutine_element(this)
         implicit none
         class(tElement), intent(inout) :: this
      end subroutine other_subroutine_element

      module subroutine overloaded_sub1(this, int)
         implicit none
         class(tElement), intent(inout) :: this
         integer(4), intent(in) :: int
      end subroutine overloaded_sub1

      module subroutine overloaded_sub2(this, real)
         implicit none
         class(tElement), intent(inout) :: this
         real(8), intent(in) :: real
      end subroutine overloaded_sub2
   end interface

end module mProject

Also look in the references for more such details:

https://software.intel.com/en-us/blogs/2013/12/30/doctor-fortran-in-its-a-modern-fortran-world

[Julian_H_]

thanks a lot