[clang] [ClangRepl] Type Directed Code Completion (PR #67349)

[Vassil Vassilev via cfe-commits]

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@@ -56,26 +63,146 @@ class ReplCompletionConsumer : public CodeCompleteConsumer {
   std::shared_ptr<GlobalCodeCompletionAllocator> CCAllocator;
   CodeCompletionTUInfo CCTUInfo;
   std::vector<std::string> &Results;
+  ReplCodeCompleter &CC;
+};
+
+// The class CompletionContextHandler contains four interfaces, each of
+// which handles one type of completion result.
+// Its substract classes are used to create concrete handlers based on
+// CodeCompletionContext.
+class CompletionContextHandler {
+protected:
+  CodeCompletionContext CCC;
+  std::vector<std::string> &Results;
+
+private:
+  Sema &S;
+
+public:
+  CompletionContextHandler(Sema &S, CodeCompletionContext CCC,
+                           std::vector<std::string> &Results)
+      : CCC(CCC), Results(Results), S(S) {}
+
+  // converts a Declaration completion result to a completion string, and then
+  // stores it in Results.
----------------
vgvassilev wrote:

```suggestion
  /// Converts a Declaration completion result to a completion string, and then
  /// stores it in Results.
```

https://github.com/llvm/llvm-project/pull/67349