Stop using std::basic_string<unsigned char>
std::basic_string<unsigned char> relies on a non-standard generic
char_traits<> implementation, recently removed from libc++.
Upstreams cl/605337651.
Relevant to #116.
diff --git a/runtime/cpp/test/emboss_memory_util_test.cc b/runtime/cpp/test/emboss_memory_util_test.cc
index 9cfcddc..c4f9ed0 100644
--- a/runtime/cpp/test/emboss_memory_util_test.cc
+++ b/runtime/cpp/test/emboss_memory_util_test.cc
@@ -12,6 +12,7 @@
// See the License for the specific language governing permissions and
// limitations under the License.
+#include <string>
#if __cplusplus >= 201703L
#include <string_view>
#endif // __cplusplus >= 201703L
@@ -221,7 +222,7 @@
typedef ::testing::Types<
/**/ ::std::vector<char>, ::std::array<char, 8>,
::std::vector<unsigned char>, ::std::vector<signed char>, ::std::string,
- ::std::basic_string<signed char>, ::std::basic_string<unsigned char>,
+ ::std::basic_string<char>,
::std::vector<unsigned char, NonstandardAllocator<unsigned char>>,
::std::basic_string<char, ::std::char_traits<char>,
NonstandardAllocator<char>>>
