1 files changed, 44 insertions, 0 deletions
diff --git a/clang/test/SemaCXX/char8_t.cpp b/clang/test/SemaCXX/char8_t.cpp
new file mode 100644
index 00000000000..5eb3d7062d2
--- /dev/null
+++ b/clang/test/SemaCXX/char8_t.cpp
@@ -0,0 +1,44 @@
+// RUN: %clang_cc1 -fchar8_t -std=c++2a -verify %s
+
+char8_t a = u8'a';
+char8_t b[] = u8"foo";
+char8_t c = 'a';
+char8_t d[] = "foo"; // expected-error {{initializing 'char8_t' array with plain string literal}} expected-note {{add 'u8' prefix}}
+
+char e = u8'a';
+char f[] = u8"foo"; // expected-error {{initialization of char array with UTF-8 string literal is not permitted by '-fchar8_t'}}
+char g = 'a';
+char h[] = "foo";
+
+void disambig() {
+  char8_t (a) = u8'x';
+}
+
+void operator""_a(char);
+void operator""_a(const char*, decltype(sizeof(0)));
+
+void test_udl1() {
+  int &x = u8'a'_a; // expected-error {{no matching literal operator}}
+  float &y = u8"a"_a; // expected-error {{no matching literal operator}}
+}
+
+int &operator""_a(char8_t);
+float &operator""_a(const char8_t*, decltype(sizeof(0)));
+
+void test_udl2() {
+  int &x = u8'a'_a;
+  float &y = u8"a"_a;
+}
+
+template<typename E, typename T> void check(T &&t) {
+  using Check = E;
+  using Check = T;
+}
+void check_deduction() {
+  check<char8_t>(u8'a');
+  check<const char8_t(&)[5]>(u8"a\u1000");
+}
+
+static_assert(sizeof(char8_t) == 1);
+static_assert(char8_t(-1) > 0);
+static_assert(u8"\u0080"[0] > 0);