libMesh::CompareElemIdsByLevel Struct Reference

Specific weak ordering for Elem *'s to be used in a set. More...

#include <compare_elems_by_level.h>

Public Member Functions
bool	operator() (const Elem *a, const Elem *b) const

Detailed Description

Specific weak ordering for Elem *'s to be used in a set.

We use the id, but first sort by level. This guarantees when traversing the set from beginning to end the lower level (parent) elements are encountered first.

Definition at line 42 of file compare_elems_by_level.h.

Member Function Documentation

operator()()

bool libMesh::CompareElemIdsByLevel::operator() ( const Elem *  a, const Elem *  b  ) const

inline

Definition at line 44 of file compare_elems_by_level.h.

  {
    libmesh_assert (a);
    libmesh_assert (b);
    const unsigned int
      al = a->level(), bl = b->level();
    const dof_id_type
      aid = a->id(),   bid = b->id();
 
    return (al == bl) ? aid < bid : al < bl;
  }

References libMesh::DofObject::id(), libMesh::Elem::level(), and libMesh::libmesh_assert().

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The documentation for this struct was generated from the following file:

• include/geom/compare_elems_by_level.h