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.. _mpi_group_compare:
MPI_Group_compare
=================
.. include_body
:ref:`MPI_Group_compare` |mdash| Compares two groups.
SYNTAX
------
C Syntax
^^^^^^^^
.. code-block:: c
#include <mpi.h>
int MPI_Group_compare(MPI_Group group1, MPI_Group group2,
int *result)
Fortran Syntax
^^^^^^^^^^^^^^
.. code-block:: fortran
USE MPI
! or the older form: INCLUDE 'mpif.h'
MPI_GROUP_COMPARE(GROUP1, GROUP2, RESULT, IERROR)
INTEGER GROUP1, GROUP2, RESULT, IERROR
Fortran 2008 Syntax
^^^^^^^^^^^^^^^^^^^
.. code-block:: fortran
USE mpi_f08
MPI_Group_compare(group1, group2, result, ierror)
TYPE(MPI_Group), INTENT(IN) :: group1, group2
INTEGER, INTENT(OUT) :: result
INTEGER, OPTIONAL, INTENT(OUT) :: ierror
INPUT PARAMETERS
----------------
* ``group1`` : First group (handle).
* ``group2`` : Second group (handle).
OUTPUT PARAMETERS
-----------------
* ``result`` : Integer which is MPI_IDENT if the order and members of
the two groups are the same, MPI_SIMILAR if only the members are the
same, and MPI_UNEQUAL otherwise.
* ``ierror`` : Fortran only: Error status (integer).
DESCRIPTION
-----------
MPI_IDENT results if the group members and group order is exactly
the same in both groups. This happens for instance if ``group1`` and
``group2`` are the same handle. MPI_SIMILAR results if the group
members are the same but the order is different. MPI_UNEQUAL results
otherwise.
ERRORS
------
.. include:: ./ERRORS.rst
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