Second part of P0482 - char8_t. Reviewed as https://reviews.llvm.org/D55308

llvm-svn: 348828
diff --git a/libcxx/test/std/strings/string.view/string.view.cons/assign.pass.cpp b/libcxx/test/std/strings/string.view/string.view.cons/assign.pass.cpp
index 3307aa6..bab7889 100644
--- a/libcxx/test/std/strings/string.view/string.view.cons/assign.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.cons/assign.pass.cpp
@@ -32,21 +32,27 @@
 
 int main () {
 
-    assert( test<std::string_view>    ( "1234"));
+    assert( test<std::string_view>    (  "1234"));
+#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
+    assert( test<std::u8string_view>  (u8"1234"));
+#endif
 #if TEST_STD_VER >= 11
 #ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
-    assert( test<std::u16string_view> (u"1234"));
-    assert( test<std::u32string_view> (U"1234"));
+    assert( test<std::u16string_view> ( u"1234"));
+    assert( test<std::u32string_view> ( U"1234"));
 #endif
 #endif
-    assert( test<std::wstring_view>   (L"1234"));
+    assert( test<std::wstring_view>   ( L"1234"));
 
 #if TEST_STD_VER > 11
-    static_assert( test<std::string_view>    ({ "abc", 3}), "");
-#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
-    static_assert( test<std::u16string_view> ({u"abc", 3}), "");
-    static_assert( test<std::u32string_view> ({U"abc", 3}), "");
+    static_assert( test<std::string_view>    ({  "abc", 3}), "");
+#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
+    static_assert( test<std::u8string_view>  ({u8"abc", 3}), "");
 #endif
-    static_assert( test<std::wstring_view>   ({L"abc", 3}), "");
+#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
+    static_assert( test<std::u16string_view> ({ u"abc", 3}), "");
+    static_assert( test<std::u32string_view> ({ U"abc", 3}), "");
+#endif
+    static_assert( test<std::wstring_view>   ({ L"abc", 3}), "");
 #endif
 }