diff --git a/lldb/include/lldb/Expression/REPL.h b/lldb/include/lldb/Expression/REPL.h
--- a/lldb/include/lldb/Expression/REPL.h
+++ b/lldb/include/lldb/Expression/REPL.h
@@ -107,6 +107,18 @@
                          CompletionRequest &request) override;
 
 protected:
+  /// Method that can be optionally overriden by subclasses to get notified
+  /// whenever an expression has been evaluated. The params of this method
+  /// include the inputs and outputs of the expression evaluation.
+  ///
+  /// Note: meta commands that start with : are not included by this method.
+  virtual void
+  OnExpressionEvaluated(const ExecutionContext &exe_ctx, llvm::StringRef code,
+                        const EvaluateExpressionOptions &expr_options,
+                        lldb::ExpressionResults execution_results,
+                        const lldb::ValueObjectSP &result_valobj_sp,
+                        const Status &error) {}
+
   static int CalculateActualIndentation(const StringList &lines);
 
   // Subclasses should override these functions to implement a functional REPL.
diff --git a/lldb/source/Expression/REPL.cpp b/lldb/source/Expression/REPL.cpp
--- a/lldb/source/Expression/REPL.cpp
+++ b/lldb/source/Expression/REPL.cpp
@@ -342,7 +342,8 @@
                                    expr_prefix, result_valobj_sp, error,
                                    nullptr); // fixed expression
 
-      // CommandInterpreter &ci = debugger.GetCommandInterpreter();
+      OnExpressionEvaluated(exe_ctx, code, expr_options, execution_results,
+                            result_valobj_sp, error);
 
       if (process_sp && process_sp->IsAlive()) {
         bool add_to_code = true;