Add tests to make sure that <string_view> provides std::size/data/empty in C++17 mode. This is LWG#3009, coming up for a vote in JAX - but we already do it, just don't have tests

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@323719 91177308-0d34-0410-b5e6-96231b3b80d8

test/std/iterators/iterator.container/data.pass.cpp

@@ -23,6 +23,10 @@
 
 #include "test_macros.h"
 
+#if TEST_STD_VER > 14
+#include <string_view>
+#endif
+
 template<typename C>
 void test_const_container( const C& c )
 {
@@ -72,6 +76,12 @@ int main()
     test_const_container ( a );
     test_const_container ( il );
 
+#if TEST_STD_VER > 14
+    std::string_view sv{"ABC"};
+    test_container ( sv );
+    test_const_container ( sv );
+#endif
+
     static constexpr int arrA [] { 1, 2, 3 };
     test_const_array ( arrA );
 }

test/std/iterators/iterator.container/empty.pass.cpp

@@ -23,6 +23,10 @@
 
 #include "test_macros.h"
 
+#if TEST_STD_VER > 14
+#include <string_view>
+#endif
+
 template<typename C>
 void test_const_container( const C& c )
 {
@@ -74,6 +78,12 @@ int main()
     test_const_container ( a );
     test_const_container ( il );
 
+#if TEST_STD_VER > 14
+    std::string_view sv{"ABC"};
+    test_container ( sv );
+    test_const_container ( sv );
+#endif
+
     static constexpr int arrA [] { 1, 2, 3 };
     test_const_array ( arrA );
 }

test/std/iterators/iterator.container/size.pass.cpp

@@ -22,6 +22,11 @@
 
 #include "test_macros.h"
 
+#if TEST_STD_VER > 14
+#include <string_view>
+#endif
+
+
 template<typename C>
 void test_const_container( const C& c )
 {
@@ -65,7 +70,6 @@ int main()
     std::list<int>   l; l.push_back(2);
     std::array<int, 1> a; a[0] = 3;
     std::initializer_list<int> il = { 4 };
-
     test_container ( v );
     test_container ( l );
     test_container ( a );
@@ -76,6 +80,12 @@ int main()
     test_const_container ( a );
     test_const_container ( il );
 
+#if TEST_STD_VER > 14
+    std::string_view sv{"ABC"};
+    test_container ( sv );
+    test_const_container ( sv );
+#endif
+
     static constexpr int arrA [] { 1, 2, 3 };
     test_const_array ( arrA );
 }

test/std/strings/string.view/string.view.access/data.pass.cpp

@@ -22,6 +22,10 @@ void test ( const CharT *s, size_t len ) {
     std::basic_string_view<CharT> sv ( s, len );
     assert ( sv.length() == len );
     assert ( sv.data() == s );
+#if TEST_STD_VER > 14
+//  make sure we pick up std::data, too!
+    assert ( sv.data() == std::data(sv));
+#endif
     }
 
 int main () {

test/std/strings/string.view/string.view.capacity/capacity.pass.cpp

@@ -55,6 +55,11 @@ void test2 ( const CharT *s, size_t len ) {
     assert ( sv1.empty() == (len == 0));
     assert ( sv1.size() == sv1.length());
     assert ( sv1.max_size() > sv1.size());
+#if TEST_STD_VER > 14
+//  make sure we pick up std::size, too!
+    assert ( sv1.size() == std::size(sv1));
+    assert ( sv1.empty() == std::empty(sv1));
+#endif
     }
 }