Add sv_construct_test_cx, _cx2

test/Jamfile.v2

@@ -361,6 +361,9 @@ compile sv_windows_h_test.cpp ;
 compile-fail sv_nullptr_fail.cpp
   : $(warnings-as-errors-off) ;
 
+compile sv_construct_test_cx.cpp ;
+compile sv_construct_test_cx2.cpp ;
+
 run span_test.cpp ;
 run span_types_test.cpp ;
 run span_constructible_test.cpp ;

test/sv_construct_test_cx.cpp

@@ -0,0 +1,147 @@
+// Copyright 2021, 2024 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/config.hpp>
+#include <boost/config/pragma_message.hpp>
+
+#if defined(BOOST_NO_CXX14_CONSTEXPR)
+
+BOOST_PRAGMA_MESSAGE( "Test skipped because BOOST_NO_CXX14_CONSTEXPR is defined" )
+int main() {}
+
+#else
+
+#if !defined(BOOST_NO_CXX17_HDR_STRING_VIEW)
+# include <string_view>
+#endif
+
+#define STATIC_ASSERT(...) static_assert(__VA_ARGS__, #__VA_ARGS__)
+
+int main()
+{
+    {
+        constexpr boost::core::string_view sv;
+
+        STATIC_ASSERT( sv.data() == nullptr );
+        STATIC_ASSERT( sv.size() == 0 );
+
+        STATIC_ASSERT( sv.begin() == sv.data() );
+        STATIC_ASSERT( sv.end() == sv.data() + sv.size() );
+
+        STATIC_ASSERT( sv.cbegin() == sv.data() );
+        STATIC_ASSERT( sv.cend() == sv.data() + sv.size() );
+
+        STATIC_ASSERT( sv.length() == sv.size() );
+        STATIC_ASSERT( sv.empty() == ( sv.size() == 0 ) );
+
+        STATIC_ASSERT( sv.max_size() == boost::core::string_view::npos );
+    }
+
+    {
+        constexpr char const* s = "123";
+
+        constexpr boost::core::string_view sv( s, 0 );
+
+        STATIC_ASSERT( sv.data() == s );
+        STATIC_ASSERT( sv.size() == 0 );
+
+        STATIC_ASSERT( sv.begin() == sv.data() );
+        STATIC_ASSERT( sv.end() == sv.data() + sv.size() );
+
+        STATIC_ASSERT( sv.cbegin() == sv.data() );
+        STATIC_ASSERT( sv.cend() == sv.data() + sv.size() );
+
+        STATIC_ASSERT( sv.length() == sv.size() );
+        STATIC_ASSERT( sv.empty() == ( sv.size() == 0 ) );
+
+        STATIC_ASSERT( sv.max_size() == boost::core::string_view::npos );
+    }
+
+    {
+        constexpr char const* s = "123";
+
+        constexpr boost::core::string_view sv( s, 2 );
+
+        STATIC_ASSERT( sv.data() == s );
+        STATIC_ASSERT( sv.size() == 2 );
+
+        STATIC_ASSERT( sv.begin() == sv.data() );
+        STATIC_ASSERT( sv.end() == sv.data() + sv.size() );
+
+        STATIC_ASSERT( sv.cbegin() == sv.data() );
+        STATIC_ASSERT( sv.cend() == sv.data() + sv.size() );
+
+        STATIC_ASSERT( sv.length() == sv.size() );
+        STATIC_ASSERT( sv.empty() == ( sv.size() == 0 ) );
+
+        STATIC_ASSERT( sv.max_size() == boost::core::string_view::npos );
+    }
+
+    {
+        constexpr char const* s = "123";
+
+        constexpr boost::core::string_view sv( s, s );
+
+        STATIC_ASSERT( sv.data() == s );
+        STATIC_ASSERT( sv.size() == 0 );
+
+        STATIC_ASSERT( sv.begin() == sv.data() );
+        STATIC_ASSERT( sv.end() == sv.data() + sv.size() );
+
+        STATIC_ASSERT( sv.cbegin() == sv.data() );
+        STATIC_ASSERT( sv.cend() == sv.data() + sv.size() );
+
+        STATIC_ASSERT( sv.length() == sv.size() );
+        STATIC_ASSERT( sv.empty() == ( sv.size() == 0 ) );
+
+        STATIC_ASSERT( sv.max_size() == boost::core::string_view::npos );
+    }
+
+    {
+        constexpr char const* s = "123";
+
+        constexpr boost::core::string_view sv( s, s + 2 );
+
+        STATIC_ASSERT( sv.data() == s );
+        STATIC_ASSERT( sv.size() == 2 );
+
+        STATIC_ASSERT( sv.begin() == sv.data() );
+        STATIC_ASSERT( sv.end() == sv.data() + sv.size() );
+
+        STATIC_ASSERT( sv.cbegin() == sv.data() );
+        STATIC_ASSERT( sv.cend() == sv.data() + sv.size() );
+
+        STATIC_ASSERT( sv.length() == sv.size() );
+        STATIC_ASSERT( sv.empty() == ( sv.size() == 0 ) );
+
+        STATIC_ASSERT( sv.max_size() == boost::core::string_view::npos );
+    }
+
+#if !defined(BOOST_NO_CXX17_HDR_STRING_VIEW)
+
+    {
+        constexpr std::string_view str( "123", 3 );
+
+        constexpr boost::core::string_view sv( str );
+
+        STATIC_ASSERT( sv.data() == str.data() );
+        STATIC_ASSERT( sv.size() == str.size() );
+
+        STATIC_ASSERT( sv.begin() == sv.data() );
+        STATIC_ASSERT( sv.end() == sv.data() + sv.size() );
+
+        STATIC_ASSERT( sv.cbegin() == sv.data() );
+        STATIC_ASSERT( sv.cend() == sv.data() + sv.size() );
+
+        STATIC_ASSERT( sv.length() == sv.size() );
+        STATIC_ASSERT( sv.empty() == ( sv.size() == 0 ) );
+
+        STATIC_ASSERT( sv.max_size() == boost::core::string_view::npos );
+    }
+
+#endif
+}
+
+#endif

test/sv_construct_test_cx2.cpp

@@ -0,0 +1,68 @@
+// Copyright 2021, 2024 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/config.hpp>
+#include <boost/config/pragma_message.hpp>
+
+#if defined(BOOST_NO_CXX14_CONSTEXPR)
+
+BOOST_PRAGMA_MESSAGE( "Test skipped because BOOST_NO_CXX14_CONSTEXPR is defined" )
+int main() {}
+
+#elif BOOST_CXX_VERSION < 201703L
+
+// std::char_traits is not constexpr in C++14
+
+BOOST_PRAGMA_MESSAGE( "Test skipped because BOOST_CXX_VERSION < 201703L" )
+int main() {}
+
+#else
+
+#define STATIC_ASSERT(...) static_assert(__VA_ARGS__, #__VA_ARGS__)
+
+int main()
+{
+    {
+        constexpr char const* s = "";
+
+        constexpr boost::core::string_view sv( s );
+
+        STATIC_ASSERT( sv.data() == s );
+        STATIC_ASSERT( sv.size() == 0 );
+
+        STATIC_ASSERT( sv.begin() == sv.data() );
+        STATIC_ASSERT( sv.end() == sv.data() + sv.size() );
+
+        STATIC_ASSERT( sv.cbegin() == sv.data() );
+        STATIC_ASSERT( sv.cend() == sv.data() + sv.size() );
+
+        STATIC_ASSERT( sv.length() == sv.size() );
+        STATIC_ASSERT( sv.empty() == ( sv.size() == 0 ) );
+
+        STATIC_ASSERT( sv.max_size() == boost::core::string_view::npos );
+    }
+
+    {
+        constexpr char const* s = "123";
+
+        constexpr boost::core::string_view sv( s );
+
+        STATIC_ASSERT( sv.data() == s );
+        STATIC_ASSERT( sv.size() == 3 );
+
+        STATIC_ASSERT( sv.begin() == sv.data() );
+        STATIC_ASSERT( sv.end() == sv.data() + sv.size() );
+
+        STATIC_ASSERT( sv.cbegin() == sv.data() );
+        STATIC_ASSERT( sv.cend() == sv.data() + sv.size() );
+
+        STATIC_ASSERT( sv.length() == sv.size() );
+        STATIC_ASSERT( sv.empty() == ( sv.size() == 0 ) );
+
+        STATIC_ASSERT( sv.max_size() == boost::core::string_view::npos );
+    }
+}
+
+#endif