================
@@ -87,6 +88,9 @@ class DependencyCollector {
bool IsSystem, bool IsModuleFile,
bool IsMissing);
+ /// @return the PPCallback this collector added to the Preprocessor.
+ virtual PPCallbacks *getPPCallbacks() { return nullptr; };
----------------
qiongsiwu wrote:
I think we will need this interface for CAS in `next`.
For example, I think we want to have it for `AttachOnlyDependencyCollector`
https://github.com/swiftlang/llvm-project/blob/251a2e715ced8f58964e794acc73704774aa4a98/clang/lib/Tooling/DependencyScanning/IncludeTreeActionController.cpp#L146
I tried to think of a few ways to do away with this interface but I could not
find a good one taking the CAS collector into account. I am all ears for a
different way to do this.
https://github.com/llvm/llvm-project/pull/164345
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