diff --git a/include/boost/core/string_view.hpp b/include/boost/core/string_view.hpp
index e9f9059..818c90d 100644
--- a/include/boost/core/string_view.hpp
+++ b/include/boost/core/string_view.hpp
@@ -122,22 +122,22 @@ public:
 
     BOOST_CONSTEXPR const_reverse_iterator rbegin() const BOOST_NOEXCEPT
     {
-        return const_reverse_iterator( begin() );
+        return const_reverse_iterator( end() );
     }
 
     BOOST_CONSTEXPR const_reverse_iterator rend() const BOOST_NOEXCEPT
     {
-        return const_reverse_iterator( end() );
+        return const_reverse_iterator( begin() );
     }
 
     BOOST_CONSTEXPR const_reverse_iterator crbegin() const BOOST_NOEXCEPT
     {
-        return const_reverse_iterator( begin() );
+        return const_reverse_iterator( end() );
     }
 
     BOOST_CONSTEXPR const_reverse_iterator crend() const BOOST_NOEXCEPT
     {
-        return const_reverse_iterator( end() );
+        return const_reverse_iterator( begin() );
     }
 
     // capacity
diff --git a/test/Jamfile.v2 b/test/Jamfile.v2
index 89d40ac..3a8f892 100644
--- a/test/Jamfile.v2
+++ b/test/Jamfile.v2
@@ -249,6 +249,7 @@ run type_name_test.cpp ;
 
 run sv_types_test.cpp ;
 run sv_construct_test.cpp ;
+run sv_iteration_test.cpp ;
 run sv_element_access_test.cpp ;
 run sv_modifiers_test.cpp ;
 run sv_copy_test.cpp ;
diff --git a/test/sv_construct_test.cpp b/test/sv_construct_test.cpp
index af38943..3e7343d 100644
--- a/test/sv_construct_test.cpp
+++ b/test/sv_construct_test.cpp
@@ -29,11 +29,11 @@ int main()
         BOOST_TEST_EQ( sv.cbegin(), sv.data() );
         BOOST_TEST_EQ( sv.cend(), sv.data() + sv.size() );
 
-        BOOST_TEST( sv.rbegin() == ::make_reverse_iterator( sv.begin() ) );
-        BOOST_TEST( sv.rend() == ::make_reverse_iterator( sv.end() ) );
+        BOOST_TEST( sv.rbegin() == ::make_reverse_iterator( sv.end() ) );
+        BOOST_TEST( sv.rend() == ::make_reverse_iterator( sv.begin() ) );
 
-        BOOST_TEST( sv.crbegin() == ::make_reverse_iterator( sv.cbegin() ) );
-        BOOST_TEST( sv.crend() == ::make_reverse_iterator( sv.cend() ) );
+        BOOST_TEST( sv.crbegin() == ::make_reverse_iterator( sv.cend() ) );
+        BOOST_TEST( sv.crend() == ::make_reverse_iterator( sv.cbegin() ) );
 
         BOOST_TEST_EQ( sv.length(), sv.size() );
         BOOST_TEST_EQ( sv.empty(), sv.size() == 0 );
@@ -55,11 +55,11 @@ int main()
         BOOST_TEST_EQ( sv.cbegin(), sv.data() );
         BOOST_TEST_EQ( sv.cend(), sv.data() + sv.size() );
 
-        BOOST_TEST( sv.rbegin() == ::make_reverse_iterator( sv.begin() ) );
-        BOOST_TEST( sv.rend() == ::make_reverse_iterator( sv.end() ) );
+        BOOST_TEST( sv.rbegin() == ::make_reverse_iterator( sv.end() ) );
+        BOOST_TEST( sv.rend() == ::make_reverse_iterator( sv.begin() ) );
 
-        BOOST_TEST( sv.crbegin() == ::make_reverse_iterator( sv.cbegin() ) );
-        BOOST_TEST( sv.crend() == ::make_reverse_iterator( sv.cend() ) );
+        BOOST_TEST( sv.crbegin() == ::make_reverse_iterator( sv.cend() ) );
+        BOOST_TEST( sv.crend() == ::make_reverse_iterator( sv.cbegin() ) );
 
         BOOST_TEST_EQ( sv.length(), sv.size() );
         BOOST_TEST_EQ( sv.empty(), sv.size() == 0 );
@@ -87,11 +87,11 @@ int main()
         BOOST_TEST_EQ( sv.cbegin(), sv.data() );
         BOOST_TEST_EQ( sv.cend(), sv.data() + sv.size() );
 
-        BOOST_TEST( sv.rbegin() == ::make_reverse_iterator( sv.begin() ) );
-        BOOST_TEST( sv.rend() == ::make_reverse_iterator( sv.end() ) );
+        BOOST_TEST( sv.rbegin() == ::make_reverse_iterator( sv.end() ) );
+        BOOST_TEST( sv.rend() == ::make_reverse_iterator( sv.begin() ) );
 
-        BOOST_TEST( sv.crbegin() == ::make_reverse_iterator( sv.cbegin() ) );
-        BOOST_TEST( sv.crend() == ::make_reverse_iterator( sv.cend() ) );
+        BOOST_TEST( sv.crbegin() == ::make_reverse_iterator( sv.cend() ) );
+        BOOST_TEST( sv.crend() == ::make_reverse_iterator( sv.cbegin() ) );
 
         BOOST_TEST_EQ( sv.length(), sv.size() );
         BOOST_TEST_EQ( sv.empty(), sv.size() == 0 );
@@ -119,11 +119,11 @@ int main()
         BOOST_TEST_EQ( sv.cbegin(), sv.data() );
         BOOST_TEST_EQ( sv.cend(), sv.data() + sv.size() );
 
-        BOOST_TEST( sv.rbegin() == ::make_reverse_iterator( sv.begin() ) );
-        BOOST_TEST( sv.rend() == ::make_reverse_iterator( sv.end() ) );
+        BOOST_TEST( sv.rbegin() == ::make_reverse_iterator( sv.end() ) );
+        BOOST_TEST( sv.rend() == ::make_reverse_iterator( sv.begin() ) );
 
-        BOOST_TEST( sv.crbegin() == ::make_reverse_iterator( sv.cbegin() ) );
-        BOOST_TEST( sv.crend() == ::make_reverse_iterator( sv.cend() ) );
+        BOOST_TEST( sv.crbegin() == ::make_reverse_iterator( sv.cend() ) );
+        BOOST_TEST( sv.crend() == ::make_reverse_iterator( sv.cbegin() ) );
 
         BOOST_TEST_EQ( sv.length(), sv.size() );
         BOOST_TEST_EQ( sv.empty(), sv.size() == 0 );
@@ -151,11 +151,11 @@ int main()
         BOOST_TEST_EQ( sv.cbegin(), sv.data() );
         BOOST_TEST_EQ( sv.cend(), sv.data() + sv.size() );
 
-        BOOST_TEST( sv.rbegin() == ::make_reverse_iterator( sv.begin() ) );
-        BOOST_TEST( sv.rend() == ::make_reverse_iterator( sv.end() ) );
+        BOOST_TEST( sv.rbegin() == ::make_reverse_iterator( sv.end() ) );
+        BOOST_TEST( sv.rend() == ::make_reverse_iterator( sv.begin() ) );
 
-        BOOST_TEST( sv.crbegin() == ::make_reverse_iterator( sv.cbegin() ) );
-        BOOST_TEST( sv.crend() == ::make_reverse_iterator( sv.cend() ) );
+        BOOST_TEST( sv.crbegin() == ::make_reverse_iterator( sv.cend() ) );
+        BOOST_TEST( sv.crend() == ::make_reverse_iterator( sv.cbegin() ) );
 
         BOOST_TEST_EQ( sv.length(), sv.size() );
         BOOST_TEST_EQ( sv.empty(), sv.size() == 0 );
@@ -183,11 +183,11 @@ int main()
         BOOST_TEST_EQ( sv.cbegin(), sv.data() );
         BOOST_TEST_EQ( sv.cend(), sv.data() + sv.size() );
 
-        BOOST_TEST( sv.rbegin() == ::make_reverse_iterator( sv.begin() ) );
-        BOOST_TEST( sv.rend() == ::make_reverse_iterator( sv.end() ) );
+        BOOST_TEST( sv.rbegin() == ::make_reverse_iterator( sv.end() ) );
+        BOOST_TEST( sv.rend() == ::make_reverse_iterator( sv.begin() ) );
 
-        BOOST_TEST( sv.crbegin() == ::make_reverse_iterator( sv.cbegin() ) );
-        BOOST_TEST( sv.crend() == ::make_reverse_iterator( sv.cend() ) );
+        BOOST_TEST( sv.crbegin() == ::make_reverse_iterator( sv.cend() ) );
+        BOOST_TEST( sv.crend() == ::make_reverse_iterator( sv.cbegin() ) );
 
         BOOST_TEST_EQ( sv.length(), sv.size() );
         BOOST_TEST_EQ( sv.empty(), sv.size() == 0 );
@@ -215,11 +215,11 @@ int main()
         BOOST_TEST_EQ( sv.cbegin(), sv.data() );
         BOOST_TEST_EQ( sv.cend(), sv.data() + sv.size() );
 
-        BOOST_TEST( sv.rbegin() == ::make_reverse_iterator( sv.begin() ) );
-        BOOST_TEST( sv.rend() == ::make_reverse_iterator( sv.end() ) );
+        BOOST_TEST( sv.rbegin() == ::make_reverse_iterator( sv.end() ) );
+        BOOST_TEST( sv.rend() == ::make_reverse_iterator( sv.begin() ) );
 
-        BOOST_TEST( sv.crbegin() == ::make_reverse_iterator( sv.cbegin() ) );
-        BOOST_TEST( sv.crend() == ::make_reverse_iterator( sv.cend() ) );
+        BOOST_TEST( sv.crbegin() == ::make_reverse_iterator( sv.cend() ) );
+        BOOST_TEST( sv.crend() == ::make_reverse_iterator( sv.cbegin() ) );
 
         BOOST_TEST_EQ( sv.length(), sv.size() );
         BOOST_TEST_EQ( sv.empty(), sv.size() == 0 );
@@ -247,11 +247,11 @@ int main()
         BOOST_TEST_EQ( sv.cbegin(), sv.data() );
         BOOST_TEST_EQ( sv.cend(), sv.data() + sv.size() );
 
-        BOOST_TEST( sv.rbegin() == ::make_reverse_iterator( sv.begin() ) );
-        BOOST_TEST( sv.rend() == ::make_reverse_iterator( sv.end() ) );
+        BOOST_TEST( sv.rbegin() == ::make_reverse_iterator( sv.end() ) );
+        BOOST_TEST( sv.rend() == ::make_reverse_iterator( sv.begin() ) );
 
-        BOOST_TEST( sv.crbegin() == ::make_reverse_iterator( sv.cbegin() ) );
-        BOOST_TEST( sv.crend() == ::make_reverse_iterator( sv.cend() ) );
+        BOOST_TEST( sv.crbegin() == ::make_reverse_iterator( sv.cend() ) );
+        BOOST_TEST( sv.crend() == ::make_reverse_iterator( sv.cbegin() ) );
 
         BOOST_TEST_EQ( sv.length(), sv.size() );
         BOOST_TEST_EQ( sv.empty(), sv.size() == 0 );
@@ -281,11 +281,11 @@ int main()
         BOOST_TEST_EQ( sv.cbegin(), sv.data() );
         BOOST_TEST_EQ( sv.cend(), sv.data() + sv.size() );
 
-        BOOST_TEST( sv.rbegin() == ::make_reverse_iterator( sv.begin() ) );
-        BOOST_TEST( sv.rend() == ::make_reverse_iterator( sv.end() ) );
+        BOOST_TEST( sv.rbegin() == ::make_reverse_iterator( sv.end() ) );
+        BOOST_TEST( sv.rend() == ::make_reverse_iterator( sv.begin() ) );
 
-        BOOST_TEST( sv.crbegin() == ::make_reverse_iterator( sv.cbegin() ) );
-        BOOST_TEST( sv.crend() == ::make_reverse_iterator( sv.cend() ) );
+        BOOST_TEST( sv.crbegin() == ::make_reverse_iterator( sv.cend() ) );
+        BOOST_TEST( sv.crend() == ::make_reverse_iterator( sv.cbegin() ) );
 
         BOOST_TEST_EQ( sv.length(), sv.size() );
         BOOST_TEST_EQ( sv.empty(), sv.size() == 0 );
diff --git a/test/sv_iteration_test.cpp b/test/sv_iteration_test.cpp
new file mode 100644
index 0000000..7e85dc0
--- /dev/null
+++ b/test/sv_iteration_test.cpp
@@ -0,0 +1,61 @@
+// Copyright 2021 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/core/string_view.hpp>
+#include <boost/core/lightweight_test.hpp>
+#include <string>
+#include <algorithm>
+
+int main()
+{
+    {
+        boost::core::string_view sv;
+
+        {
+            std::string s( sv.begin(), sv.end() );
+            BOOST_TEST_EQ( s, std::string( "" ) );
+        }
+
+        {
+            std::string s( sv.cbegin(), sv.cend() );
+            BOOST_TEST_EQ( s, std::string( "" ) );
+        }
+
+        {
+            std::string s( sv.rbegin(), sv.rend() );
+            BOOST_TEST_EQ( s, std::string( "" ) );
+        }
+
+        {
+            std::string s( sv.crbegin(), sv.crend() );
+            BOOST_TEST_EQ( s, std::string( "" ) );
+        }
+    }
+
+    {
+        boost::core::string_view sv( "123" );
+
+        {
+            std::string s( sv.begin(), sv.end() );
+            BOOST_TEST_EQ( s, std::string( "123" ) );
+        }
+
+        {
+            std::string s( sv.cbegin(), sv.cend() );
+            BOOST_TEST_EQ( s, std::string( "123" ) );
+        }
+
+        {
+            std::string s( sv.rbegin(), sv.rend() );
+            BOOST_TEST_EQ( s, std::string( "321" ) );
+        }
+
+        {
+            std::string s( sv.crbegin(), sv.crend() );
+            BOOST_TEST_EQ( s, std::string( "321" ) );
+        }
+    }
+
+    return boost::report_errors();
+}