/*D
   MPI_Iexscan - Computes the exclusive scan (partial reductions) of data on a collection of processes in a nonblocking way

Synopsis:
.vb
int MPI_Iexscan(const void *sendbuf, void *recvbuf, int count,
                MPI_Datatype datatype, MPI_Op op, MPI_Comm comm,
                MPI_Request *request)
.ve
.vb
int MPI_Iexscan_c(const void *sendbuf, void *recvbuf, MPI_Count count,
                  MPI_Datatype datatype, MPI_Op op, MPI_Comm comm,
                  MPI_Request *request)
.ve

Input Parameters:
+ sendbuf - starting address of send buffer (choice)
. count - number of elements in input buffer (non-negative integer)
. datatype - data type of elements of input buffer (handle)
. op - operation (handle)
- comm - intra-communicator (handle)

Output Parameters:
+ recvbuf - starting address of receive buffer (choice)
- request - communication request (handle)

.N collops

.N ThreadSafe

.N Fortran

.N Errors
.N MPI_SUCCESS
.N MPI_ERR_ARG
.N MPI_ERR_BUFFER
.N MPI_ERR_COMM
.N MPI_ERR_COUNT
.N MPI_ERR_OP
.N MPI_ERR_TYPE
.N MPI_ERR_OTHER

D*/

