Introduce basic support for dependent types, type-dependent
expressions, and value-dependent expressions. This permits us to parse
some template definitions.

This is not a complete solution; we're missing type- and
value-dependent computations for most of the expression types, and
we're missing checks for dependent types and type-dependent
expressions throughout Sema.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@60615 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/StmtIterator.cpp b/lib/AST/StmtIterator.cpp
index 4688242..4800345 100644
--- a/lib/AST/StmtIterator.cpp
+++ b/lib/AST/StmtIterator.cpp
@@ -16,6 +16,8 @@
 
 using namespace clang;
 
+// FIXME: Add support for dependent-sized array types in C++?
+// Does it even make sense to build a CFG for an uninstantiated template?
 static inline VariableArrayType* FindVA(Type* t) {
   while (ArrayType* vt = dyn_cast<ArrayType>(t)) {
     if (VariableArrayType* vat = dyn_cast<VariableArrayType>(vt))