Introduce a bit into Type that keeps track of whether there are any
unnamed or local types within that type. This bit is cached along with
the linkage of a type, so that it can be recomputed (e.g., when we see
that a typedef has given a name to an anonymous declaration).

Use this bit when checking C++03 [temp.arg.type]p2, so that we don't
walk template argument types repeatedly.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@116413 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed