Replace __cplusplus comparisons and dialect __has_feature checks with TEST_STD_VER.

This is a huge cleanup that helps make the libc++ test suite more portable.
Patch from STL@microsoft.com. Thanks STL!


git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@272716 91177308-0d34-0410-b5e6-96231b3b80d8

test/std/strings/basic.string/string.iterators/begin.pass.cpp

@@ -38,7 +38,7 @@ int main()
     test(S());
     test(S("123"));
     }
-#if __cplusplus >= 201103L
+#if TEST_STD_VER >= 11
     {
     typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
     test(S());

test/std/strings/basic.string/string.iterators/cbegin.pass.cpp

@@ -35,7 +35,7 @@ int main()
     test(S());
     test(S("123"));
     }
-#if __cplusplus >= 201103L
+#if TEST_STD_VER >= 11
     {
     typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
     test(S());

test/std/strings/basic.string/string.iterators/cend.pass.cpp

@@ -31,7 +31,7 @@ int main()
     test(S());
     test(S("123"));
     }
-#if __cplusplus >= 201103L
+#if TEST_STD_VER >= 11
     {
     typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
     test(S());

test/std/strings/basic.string/string.iterators/crbegin.pass.cpp

@@ -35,7 +35,7 @@ int main()
     test(S());
     test(S("123"));
     }
-#if __cplusplus >= 201103L
+#if TEST_STD_VER >= 11
     {
     typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
     test(S());

test/std/strings/basic.string/string.iterators/crend.pass.cpp

@@ -31,7 +31,7 @@ int main()
     test(S());
     test(S("123"));
     }
-#if __cplusplus >= 201103L
+#if TEST_STD_VER >= 11
     {
     typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
     test(S());

test/std/strings/basic.string/string.iterators/db_iterators_2.pass.cpp

@@ -32,7 +32,7 @@ int main()
     bool b = s1.begin() < s2.begin();
     assert(false);
     }
-#if __cplusplus >= 201103L
+#if TEST_STD_VER >= 11
     {
     typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
     S s1;

test/std/strings/basic.string/string.iterators/db_iterators_3.pass.cpp

@@ -32,7 +32,7 @@ int main()
     int i = s1.begin() - s2.begin();
     assert(false);
     }
-#if __cplusplus >= 201103L
+#if TEST_STD_VER >= 11
     {
     typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
     S s1;

test/std/strings/basic.string/string.iterators/db_iterators_4.pass.cpp

@@ -33,7 +33,7 @@ int main()
     assert(i[1] == 0);
     assert(false);
     }
-#if __cplusplus >= 201103L
+#if TEST_STD_VER >= 11
     {
     typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> C;
     C c(1, '\0');

test/std/strings/basic.string/string.iterators/db_iterators_5.pass.cpp

@@ -35,7 +35,7 @@ int main()
     i += 2;
     assert(false);
     }
-#if __cplusplus >= 201103L
+#if TEST_STD_VER >= 11
     {
     typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> C;
     C c(1, '\0');

test/std/strings/basic.string/string.iterators/db_iterators_6.pass.cpp

@@ -34,7 +34,7 @@ int main()
     --i;
     assert(false);
     }
-#if __cplusplus >= 201103L
+#if TEST_STD_VER >= 11
     {
     typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> C;
     C c(1, '\0');

test/std/strings/basic.string/string.iterators/db_iterators_7.pass.cpp

@@ -34,7 +34,7 @@ int main()
     ++i;
     assert(false);
     }
-#if __cplusplus >= 201103L
+#if TEST_STD_VER >= 11
     {
     typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> C;
     C c(1, '\0');

test/std/strings/basic.string/string.iterators/db_iterators_8.pass.cpp

@@ -32,7 +32,7 @@ int main()
     char j = *i;
     assert(false);
     }
-#if __cplusplus >= 201103L
+#if TEST_STD_VER >= 11
     {
     typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> C;
     C c(1, '\0');

test/std/strings/basic.string/string.iterators/end.pass.cpp

@@ -40,7 +40,7 @@ int main()
     test(S());
     test(S("123"));
     }
-#if __cplusplus >= 201103L
+#if TEST_STD_VER >= 11
     {
     typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
     test(S());

test/std/strings/basic.string/string.iterators/rbegin.pass.cpp

@@ -38,7 +38,7 @@ int main()
     test(S());
     test(S("123"));
     }
-#if __cplusplus >= 201103L
+#if TEST_STD_VER >= 11
     {
     typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
     test(S());

test/std/strings/basic.string/string.iterators/rend.pass.cpp

@@ -40,7 +40,7 @@ int main()
     test(S());
     test(S("123"));
     }
-#if __cplusplus >= 201103L
+#if TEST_STD_VER >= 11
     {
     typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
     test(S());