feat: add default interface handling for debug sessions in Evaluator

modules/interpreter/src/cpp/Evaluator.cpp

@@ -53,6 +53,7 @@ Evaluator::Evaluator(Context* aContext, Interface* aInterface, bool haveEventsLo
     depth = 0;
     _haveEventsLoop = haveEventsLoop;
     io = aInterface;
+    defaultInterface = aInterface;
     InCLI = false;
     bpActive = false;
     clearStacks();
@@ -204,6 +205,13 @@ Evaluator::getInterface()
 {
     return io;
 }
+//======================================================================
+// Returns the default (interactive) interface.
+Interface*
+Evaluator::getDefaultInterface()
+{
+    return defaultInterface ? defaultInterface : io;
+}
 //=============================================================================
 // Returns the ID of the evaluator.
 size_t
@@ -604,7 +612,19 @@ Evaluator::debugCLI()
     if (haveEventsLoop()) {
         ProcessEventsDynamicFunctionWithoutWait();
     }
+    // If the current interface is not the default (interactive) one
+    // (e.g., during evalc), temporarily restore the interactive interface
+    // so that the debug CLI can read user input.
+    Interface* savedIO = nullptr;
+    if (io != defaultInterface && defaultInterface != nullptr) {
+        savedIO = io;
+        io = defaultInterface;
+    }
     evalCLI();
+    // Restore the previous interface after the debug session
+    if (savedIO != nullptr) {
+        io = savedIO;
+    }
     // After evalCLI() returns, check if debug mode should be exited:
     // - If a debug command set bpActive to false, keep it false
     // - If script finished without active breakpoint, exit debug mode

modules/interpreter/src/include/Evaluator.hpp

@@ -89,6 +89,13 @@ class NLSINTERPRETER_IMPEXP Evaluator
      * The interface for I/O
      */
     Interface* io;
+    /**
+     * The default (interactive) interface, saved at construction.
+     * Used to restore interactive I/O during debug sessions
+     * when the current interface has been temporarily replaced
+     * (e.g., by evalc).
+     */
+    Interface* defaultInterface = nullptr;
 
     int exitCode = 0;
 
@@ -318,6 +325,8 @@ class NLSINTERPRETER_IMPEXP Evaluator
     setInterface(Interface* _io);
     Interface*
     getInterface();
+    Interface*
+    getDefaultInterface();
     /**
      * Process an AST to form an lvalue in an assignment statement.
      * The AST looks like: