Implement basic token pasting (## operator). This implements
test/Preprocessor/macro_paste_simple.c and macro_paste_bad.c. There are
several known bugs still.
llvm-svn: 38733
diff --git a/clang/test/Preprocessor/macro_paste_bad.c b/clang/test/Preprocessor/macro_paste_bad.c
new file mode 100644
index 0000000..60caa42
--- /dev/null
+++ b/clang/test/Preprocessor/macro_paste_bad.c
@@ -0,0 +1,5 @@
+// RUN: clang -Eonly %s 2>&1 | grep error
+// pasting ""x"" and ""+"" does not give a valid preprocessing token
+#define XYZ x ## +
+XYZ
+