Add missing friend declaration

Fixes issue #100
Exercise subtraction between iterators in the unit tests
2026-01-20 04:32:12 +00:00 · 2025-12-22 12:21:01 +01:00 · 2025-12-22 11:53:06 +01:00
2 changed files with 4 additions and 0 deletions
--- a/include/boost/dynamic_bitset/dynamic_bitset.hpp
+++ b/include/boost/dynamic_bitset/dynamic_bitset.hpp
@@ -1440,6 +1440,8 @@ public:
    friend BOOST_DYNAMIC_BITSET_CONSTEXPR20 bool operator==( const bit_iterator_base< Iter > & lhs, const bit_iterator_base< Iter > & rhs );
    template< typename Iter >
    friend BOOST_DYNAMIC_BITSET_CONSTEXPR20 bool operator<( const bit_iterator_base< Iter > & lhs, const bit_iterator_base< Iter > & rhs );
+    template< typename Iter >
+    friend BOOST_DYNAMIC_BITSET_CONSTEXPR20 difference_type operator-( const bit_iterator_base< Iter > & lhs, const bit_iterator_base< Iter > & rhs );

 protected:
    BOOST_DYNAMIC_BITSET_CONSTEXPR20 void increment();
--- a/test/bitset_test.hpp
+++ b/test/bitset_test.hpp
@@ -248,6 +248,8 @@ struct bitset_test
            BOOST_TEST( *( 1 + b.begin() ) == b[ 1 ] );
            BOOST_TEST( *( b.end() - 1 ) == b[ b.size() - 1 ] );
        }
+
+        BOOST_TEST( b.end() - b.begin() == static_cast< std::ptrdiff_t >( b.size() ) );
    }

    static void
Author	SHA1	Message	Date
sehe	9b64641093	Add missing friend declaration Fixes issue #100	2025-12-22 12:21:01 +01:00
Gennaro Prota	54c841d585	Exercise subtraction between iterators in the unit tests Reason: This was missing. And we forgot a friend declaration for the corresponding operator-(), which will be added with the next commit.	2025-12-22 11:53:06 +01:00