Clean up the tests for free data(), size() and empty()

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@318313 91177308-0d34-0410-b5e6-96231b3b80d8

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

@@ -7,51 +7,54 @@
 //
 //===----------------------------------------------------------------------===//
 
+// UNSUPPORTED: c++98, c++03, c++11, c++14
+
 // <iterator>
 // template <class C> constexpr auto data(C& c) -> decltype(c.data());               // C++17
 // template <class C> constexpr auto data(const C& c) -> decltype(c.data());         // C++17
 // template <class T, size_t N> constexpr T* data(T (&array)[N]) noexcept;           // C++17
 // template <class E> constexpr const E* data(initializer_list<E> il) noexcept;      // C++17
 
-#include "test_macros.h"
-
-#if TEST_STD_VER <= 14
-int main () {}
-#else
-
 #include <iterator>
 #include <cassert>
 #include <vector>
 #include <array>
 #include <initializer_list>
 
+#include "test_macros.h"
+
 template<typename C>
 void test_const_container( const C& c )
 {
+//  Can't say noexcept here because the container might not be
     assert ( std::data(c)   == c.data());
 }
 
 template<typename T>
 void test_const_container( const std::initializer_list<T>& c )
 {
+    ASSERT_NOEXCEPT(std::data(c));
     assert ( std::data(c)   == c.begin());
 }
 
 template<typename C>
 void test_container( C& c )
 {
+//  Can't say noexcept here because the container might not be
     assert ( std::data(c)   == c.data());
 }
 
 template<typename T>
 void test_container( std::initializer_list<T>& c)
 {
+    ASSERT_NOEXCEPT(std::data(c));
     assert ( std::data(c)   == c.begin());
 }
 
 template<typename T, size_t Sz>
 void test_const_array( const T (&array)[Sz] )
 {
+    ASSERT_NOEXCEPT(std::data(array));
     assert ( std::data(array) == &array[0]);
 }
 
@@ -72,5 +75,3 @@ int main()
     static constexpr int arrA [] { 1, 2, 3 };
     test_const_array ( arrA );
 }
-
-#endif