Fix a couple of bugs, add some new cool stuff.
1. Fix a todo in Parser::ParseTag, to recover better. On code like
that in test/Sema/decl-invalid.c it causes us to return a single
error instead of multiple.
2. Fix an error in Sema::ParseDeclarator, where it would crash if the
declarator didn't have an identifier. Instead, diagnose the problem.
3. Start adding infrastructure to track the range of locations covered
by a declspec or declarator. This is mostly implemented for declspec,
but could be improved, it is missing for declarator.
Thanks to Neil for pointing out this crash.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@40482 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Preprocessor/macro_rescan.c b/test/Preprocessor/macro_rescan.c
new file mode 100644
index 0000000..2ceb292
--- /dev/null
+++ b/test/Preprocessor/macro_rescan.c
@@ -0,0 +1,9 @@
+// RUN: clang -E %s | grep 'ei_1 = (17 +1);' &&
+// RUN: clang -E %s | grep 'ei_2 = (M1)(17);'
+
+#define M1(a) (a+1)
+#define M2(b) b
+
+int ei_1 = M2(M1)(17); /* becomes int ei_1 = (17+1); */
+int ei_2 = (M2(M1))(17); /* becomes int ei_2 = (M1)(17); */
+