valid iterator check to Eigen Matrix graph iterator

Author: raphael-s-steiner

include/osp/graph_implementations/eigen_matrix_adapter/eigen_sparse_iterator.hpp

@@ -77,6 +77,8 @@ class EigenCSRRange {
         }
 
         inline bool operator!=(const Iterator &other) const { return not(*this == other); }
+
+        inline operator bool() const { return it_; }
     };
 
     EigenCSRRange(const Graph &graph, EigenIdxType idx) : graph_(graph), index_(idx) {}
@@ -140,6 +142,8 @@ class EigenCSCRange {
         }
 
         inline bool operator!=(const Iterator &other) const { return not(*this == other); }
+
+        inline operator bool() const { return it_; }
     };
 
     EigenCSCRange(const Graph &graph, EigenIdxType idx) : graph_(graph), index_(idx) {}

tests/sparse_matrix_impl.cpp

@@ -262,6 +262,7 @@ BOOST_AUTO_TEST_CASE(TestSparseMatrixAdapter2) {
                 BOOST_CHECK(it == it_other);
                 BOOST_CHECK(cntr == 0U || it != begin);
                 BOOST_CHECK(cntr == 0U || (not (it == begin)));
+                BOOST_CHECK_EQUAL(it, it != end);
 
                 ++cntr;
                 ++it;
@@ -273,6 +274,7 @@ BOOST_AUTO_TEST_CASE(TestSparseMatrixAdapter2) {
             BOOST_CHECK_EQUAL(cntr, graph2.OutDegree(vert));
             BOOST_CHECK(it == end);
             BOOST_CHECK(it2 == end2);
+            BOOST_CHECK_EQUAL(it, it != end);
         }
 
         for (const auto &vert : graph2.Vertices()) {
@@ -293,6 +295,7 @@ BOOST_AUTO_TEST_CASE(TestSparseMatrixAdapter2) {
                 BOOST_CHECK_EQUAL(*it, *it2);
                 BOOST_CHECK(cntr == 0U || it != begin);
                 BOOST_CHECK(cntr == 0U || (not (it == begin)));
+                BOOST_CHECK_EQUAL(it, it != end);
 
                 ++cntr;
                 ++it;
@@ -303,6 +306,7 @@ BOOST_AUTO_TEST_CASE(TestSparseMatrixAdapter2) {
             BOOST_CHECK_EQUAL(cntr, graph2.InDegree(vert));
             BOOST_CHECK(it == end);
             BOOST_CHECK(it2 == end2);
+            BOOST_CHECK_EQUAL(it, it != end);
         }
     }
 }