core:(fixes #1167) Add scheduled lambda example inside sample-simulator

Author: animeshsri14

src/core/examples/sample-simulator.cc

@@ -39,20 +39,25 @@ class MyModel
      *
      * @param [in] eventValue Event argument.
      */
-    void HandleEvent(double eventValue);
+    void HandleEvent(Time eventValue);
 };
 
 void
 MyModel::Start()
 {
-    Simulator::Schedule(Seconds(10), &MyModel::HandleEvent, this, Simulator::Now().GetSeconds());
+    Simulator::Schedule(Seconds(10), &MyModel::HandleEvent, this, Simulator::Now());
+
+    Simulator::Schedule(Seconds(11), []() {
+        std::cout << "Lambda scheduled from within a class method at "
+                  << Simulator::Now().As(Time::S) << std::endl;
+    });
 }
 
 void
-MyModel::HandleEvent(double value)
+MyModel::HandleEvent(Time value)
 {
-    std::cout << "Member method received event at " << Simulator::Now().GetSeconds()
-              << "s started at " << value << "s" << std::endl;
+    std::cout << "Member method received event at " << Simulator::Now().As(Time::S)
+              << " started at " << value.As(Time::S) << std::endl;
 }
 
 /**
@@ -63,8 +68,7 @@ MyModel::HandleEvent(double value)
 void
 ExampleFunction(MyModel* model)
 {
-    std::cout << "ExampleFunction received event at " << Simulator::Now().GetSeconds() << "s"
-              << std::endl;
+    std::cout << "ExampleFunction received event at " << Simulator::Now().As(Time::S) << std::endl;
     model->Start();
 }
 
@@ -74,8 +78,7 @@ ExampleFunction(MyModel* model)
 void
 RandomFunction()
 {
-    std::cout << "RandomFunction received event at " << Simulator::Now().GetSeconds() << "s"
-              << std::endl;
+    std::cout << "RandomFunction received event at " << Simulator::Now().As(Time::S) << std::endl;
 }
 
 /** Simple function event handler; the corresponding event is cancelled. */

src/core/examples/sample-simulator.py

@@ -39,6 +39,8 @@ def CancelledEvent():
 ns.cppyy.cppdef("""
     #include "CPyCppyy/API.h"
 
+    #include <iostream>
+
     using namespace ns3;
     /** Simple model object to illustrate event handling. */
     class MyModel
@@ -51,28 +53,35 @@ class MyModel
       /**
        *  Simple event handler.
        *
-       * \param [in] eventValue Event argument.
+       * @param [in] eventValue Event argument.
        */
-      void HandleEvent (double eventValue);
+      void HandleEvent (Time eventValue);
     };
 
     void
     MyModel::Start ()
     {
       Simulator::Schedule (Seconds (10.0),
                            &MyModel::HandleEvent,
-                           this, Simulator::Now ().GetSeconds ());
+                           this, Simulator::Now());
+
+      Simulator::Schedule (Seconds (11.0), []() {
+        std::cout << "Lambda scheduled from within a class method at "
+                  << Simulator::Now().As(Time::S)
+                  << std::endl;
+      });
     }
+
     void
-    MyModel::HandleEvent (double value)
+    MyModel::HandleEvent (Time value)
     {
       std::cout << "Member method received event at "
-                << Simulator::Now ().GetSeconds ()
-                << "s started at " << value << "s" << std::endl;
+                << Simulator::Now().As(Time::S)
+                << " started at " << value.As(Time::S) << std::endl;
     }
 
     void ExampleFunction(MyModel& model){
-      std::cout << "ExampleFunction received event at " << Simulator::Now().GetSeconds() << "s" << std::endl;
+      std::cout << "ExampleFunction received event at " << Simulator::Now().As(Time::S) << std::endl;
       model.Start();
     };
 

src/core/test/core-example-simulator.reflog

@@ -1,4 +1,5 @@
-ExampleFunction received event at 10s
-RandomFunction received event at 18.1653s
-Member method received event at 20s started at 10s
-Code within a lambda expression at time +25s
+ExampleFunction received event at +10s
+RandomFunction received event at +18.1653s
+Member method received event at +20s started at +10s
+Lambda scheduled from within a class method at +21s
+Code within a lambda expression at time +25s