:ref:`MPI_T_category_get_categories` |mdash| Query which categories are in a category
#include <mpi.h>
int MPI_T_category_get_categories(int cat_index, int len, int indices[])
cat_index
: Index of the category to be queried.len
: The length of the indices array.
indices
: An integer array of size len, indicating category indices.
:ref:`MPI_T_category_get_categories` can be used to query which other categories are in a category.
:ref:`MPI_T_category_get_categories` will fail if:
MPI_T_ERR_NOT_INITIALIZED
: The MPI Tools interface not initializedMPI_T_ERR_INVALID_INDEX
: The category index is invalid