Add conversions from and to boost::string_view

test/CMakeLists.txt

@@ -1,4 +1,4 @@
-# Copyright 2018, 2019, 2021 Peter Dimov
+# Copyright 2018-2021 Peter Dimov
 # Distributed under the Boost Software License, Version 1.0.
 # See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt
 
@@ -23,6 +23,10 @@ set(BOOST_TEST_LINK_LIBRARIES Boost::core Boost::throw_exception)
 
 boost_test(TYPE run SOURCES no_exceptions_support_test.cpp)
 
+set(BOOST_TEST_LINK_LIBRARIES Boost::core Boost::utility)
+
+boost_test(TYPE run SOURCES sv_conversion_test2.cpp)
+
 endif()
 
 add_subdirectory(swap)

test/Jamfile.v2

@@ -305,6 +305,7 @@ run sv_eq_test.cpp ;
 run sv_lt_test.cpp ;
 run sv_stream_insert_test.cpp ;
 run sv_conversion_test.cpp ;
+run sv_conversion_test2.cpp : ;
 
 run span_test.cpp ;
 run span_types_test.cpp ;

test/sv_conversion_test2.cpp

@@ -0,0 +1,32 @@
+// Copyright 2021 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/core/detail/string_view.hpp>
+#include <boost/utility/string_view.hpp>
+#include <boost/core/lightweight_test.hpp>
+#include <string>
+
+boost::core::string_view f( boost::core::string_view const& str )
+{
+    return str;
+}
+
+int main()
+{
+    {
+        std::string s1( "123" );
+        std::string s2 = f( s1 );
+
+        BOOST_TEST_EQ( s1, s2 );
+    }
+
+    {
+        boost::string_view s1( "123" );
+        boost::string_view s2 = f( s1 );
+
+        BOOST_TEST_EQ( s1, s2 );
+    }
+
+    return boost::report_errors();
+}