NAME

       MPI_Type_delete_attr - Deletes a datatype-caching attribute value associated with a key.

SYNTAX

C Syntax

       #include <mpi.h>
       int MPI_Type_delete_attr(MPI_Datatype type, int type_keyval)

Fortran Syntax

       USE MPI
       ! or the older form: INCLUDE 'mpif.h'
       MPI_TYPE_DELETE_ATTR(TYPE, TYPE_KEYVAL, IERROR)
            INTEGER   TYPE, TYPE_KEYVAL, IERROR

Fortran 2008 Syntax

       USE mpi_f08
       MPI_Type_delete_attr(datatype, type_keyval, ierror)
            TYPE(MPI_Datatype), INTENT(IN) :: datatype
            INTEGER, INTENT(IN) :: type_keyval
            INTEGER, OPTIONAL, INTENT(OUT) :: ierror

C++ Syntax

       #include <mpi.h>
       void MPI::Datatype::Delete_attr(int type_keyval)

INPUT/OUTPUT PARAMETER

       type      Data type from which the attribute is deleted (handle).n

INPUT PARAMETER

       type_keyval
                 Key value (integer).

OUTPUT PARAMETER

       IERROR    Fortran only: Error status (integer).

DESCRIPTION

       MPI_Type_delete_attr  deletes  a  datatype-caching  attribute  value associated with a key. This routines
       partially replaces MPI_Attr_delete, which is now deprecated.

NOTES

       Note that it is not defined by the MPI standard what happens if the delete_fn callback invokes other  MPI
       functions.   In  Open  MPI,  it is not valid for delete_fn callbacks (or any of their children) to add or
       delete attributes on the same object on which the delete_fn callback is being invoked.

ERRORS

       Almost all MPI routines return an error value; C routines as  the  value  of  the  function  and  Fortran
       routines in the last argument. C++ functions do not return errors. If the default error handler is set to
       MPI::ERRORS_THROW_EXCEPTIONS,  then  on  error  the  C++  exception  mechanism  will  be used to throw an
       MPI::Exception object.

       Before the error value is returned, the current MPI error handler  is  called.  By  default,  this  error
       handler  aborts  the  MPI  job,  except  for  I/O  function errors. The error handler may be changed with
       MPI_Comm_set_errhandler; the predefined error handler MPI_ERRORS_RETURN may be used to cause error values
       to be returned. Note that MPI does not guarantee that an MPI program can continue past an error.

4.1.6                                             Sep 30, 2023                           MPI_Type_delete_attr(3)