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-rw-r--r--clang/test/Lexer/char8_t.cpp17
1 files changed, 17 insertions, 0 deletions
diff --git a/clang/test/Lexer/char8_t.cpp b/clang/test/Lexer/char8_t.cpp
new file mode 100644
index 00000000000..20f820e2401
--- /dev/null
+++ b/clang/test/Lexer/char8_t.cpp
@@ -0,0 +1,17 @@
+// RUN: %clang_cc1 -std=c++2a -verify %s
+// RUN: %clang_cc1 -std=c++2a -verify %s -fchar8_t
+
+#if defined(__cpp_char8_t) && __is_identifier(char8_t)
+#error char8_t is an identifier under -fchar8_t
+#endif
+
+#if !defined(__cpp_char8_t) && !__is_identifier(char8_t)
+#error char8_t is a keyword under -fno-char8_t
+#endif
+
+char8_t c8t;
+#ifndef __cpp_char8_t
+// expected-error@-2 {{unknown type}}
+#else
+// expected-no-diagnostics
+#endif
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