================
@@ -49,6 +51,135 @@ LLVM_INSTANTIATE_REGISTRY(FrontendPluginRegistry)
namespace {
+/// Dumps deserialized declarations.
+class DeserializedDeclsLineRangePrinter : public
DelegatingDeserializationListener, public ASTConsumer {
+public:
+ explicit DeserializedDeclsLineRangePrinter(SourceManager &SM,
std::unique_ptr<llvm::raw_fd_ostream> OS)
+ : DelegatingDeserializationListener(nullptr, false), SM(SM),
OS(std::move(OS)) {}
----------------
VitaNuo wrote:
The chain of delegating listeners isn't available at the point where we create
and register this listener ([this deserial
listener](https://github.com/VitaNuo/llvm-project/blob/main/clang/lib/Frontend/FrontendAction.cpp#L977)
is passed through a chain in `BeginSourceFile`, whereas our new listener is
created and registered in `CreateWrappedASTConsumer`).
However, it seems to me that we can switch inheriting from
`DelegatingDeserializationListener` to parent `ASTDeserializationListener`. We
create our own `ASTConsumer`, for which `DeserializedDeclsLineRangePrinter` is
the only deserialization listener, which IMU means we don't need any chaining.
On the contrary, the chain of consumers in `BeginSourceFile` is attached to a
single ASTConsumer, so chaining is inevitable.
https://github.com/llvm/llvm-project/pull/133910
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