TagBoxArray::hasTags

[WeiqunZhang]

Summary

In #1258, TagBoxArray::numtags was removed. However, IAMR still needs it.
So a new function, hasTags, is added for IAMR.

Checklist

The proposed changes:

• fix a bug or incorrect behavior in AMReX
• add new capabilities to AMReX
• changes answers in the test suite to more than roundoff level
• are likely to significantly affect the results of downstream AMReX users
• are described in the proposed changes to the AMReX documentation, if appropriate

[WeiqunZhang]

Please make the following change in IAmR

diff --git a/Source/NavierStokesBase.cpp b/Source/NavierStokesBase.cpp
index db08de3..ca575ef 100644
--- a/Source/NavierStokesBase.cpp
+++ b/Source/NavierStokesBase.cpp
@@ -2367,11 +2367,7 @@ NavierStokesBase::manual_tags_placement (TagBoxArray&    tags,
                 // Only refine if there are already tagged cells in the outflow
                 // region
                 //
-                bool hasTags = false;
-                for (MFIter tbi(tags); !hasTags && tbi.isValid(); ++tbi)
-                    if (tags[tbi].numTags(outflowBox) > 0)
-                        hasTags = true;
-               ParallelAllReduce::Or(hasTags, ParallelContext::CommunicatorSub());
+                bool hasTags = tags.hasTags(outflowBox);
                 if (hasTags)
                     tags.setVal(BoxArray(&outflowBox,1),TagBox::SET);
            }

[drummerdoc]

Change made to IAMR.