Add the clang library to the repo (with some of my changes, too).

1 files changed, 33 insertions, 0 deletions

diff --git a/clang/test/SemaCXX/libstdcxx_is_pod_hack.cpp b/clang/test/SemaCXX/libstdcxx_is_pod_hack.cpp
new file mode 100644
index 0000000..3ac2336
--- /dev/null
+++ b/clang/test/SemaCXX/libstdcxx_is_pod_hack.cpp
@@ -0,0 +1,33 @@
+// RUN: %clang_cc1 -fsyntax-only %s
+
+// This is a test for an egregious hack in Clang that works around
+// issues with GCC's evolution. libstdc++ 4.2.x uses __is_pod as an
+// identifier (to declare a struct template like the one below), while
+// GCC 4.3 and newer make __is_pod a keyword. Clang treats __is_pod as
+// a keyword *unless* it is introduced following the struct keyword.
+
+template<typename T>
+struct __is_pod {
+};
+
+__is_pod<int> ipi;
+
+// Ditto for __is_same.
+template<typename T>
+struct __is_same {
+};
+
+__is_same<int> isi;
+
+// Another, similar egregious hack for __is_signed, which is a type
+// trait in Embarcadero's compiler but is used as an identifier in
+// libstdc++.
+struct test_is_signed {
+  static const bool __is_signed = true;
+};
+
+bool check_signed = test_is_signed::__is_signed;
+
+#if __has_feature(is_pod)
+#  error __is_pod won't work now anyway
+#endif