Bård Skaflestad 65a63b95a3 RegionMapping<>: Support arbitrary region IDs ...

This commit introduces a new public method, activeRegions(), that
retrieves those region IDs that contain at least one active cell.
We furthermore extend the cells() method to support lookup of
arbitrary region IDs.  Non-active region IDs produce empty cell
ranges.

Intended use case is

    for (const auto& reg : rmap.activeRegions()) {
        const auto& c = rmap.cells(reg);

        // use c
    }

2018-01-02 14:28:06 +01:00

..

RegionMapping.hpp

RegionMapping<>: Support arbitrary region IDs

2018-01-02 14:28:06 +01:00