Lambda expression breakpoints and debugger watches in Rider

8 Responses to Lambda expression breakpoints and debugger watches in Rider

1. 

   Dev says:

   October 30, 2017

   Do you plan to eat into Oz-Code’s features? I have to say Rider looks quite good, if I ever become rich I will buy a personal licence!

2. 

   Tom says:

   October 30, 2017

   You will convert me at once if data breakpoint are supported.

3. 

   Marcel Bradea says:

   November 13, 2017

   @Dev Rider’s not expensive, the pricing is very sensible.
   If you were to ever become rich – you may just buy a Visual Studio licence! (and then realize Rider is quickly becoming a better/faster IDE) – though not quite all the way there yet 🙂

4. 

   M says:

   January 9, 2018

   It doesn’t seem possible to set a breakpoint inside an inline Action or Func that is passed as a parameter.
   However, if you put a breakpoint in a classic method or function called by said inline Action or Func, you can then continue to step into your Action or Func for the remaining code after the call to said classic method.
   Am I missing something?

   • 

     Maarten Balliauw says:

     January 10, 2018

     You mean something like this?

     public static void Main(string[] args)
     {
         var myProvider = new Func<string, string>(name =>
         {
             // breakpoint here
             if (!string.IsNullOrEmpty(name))
             {
                 return name;
             }
     
             return "world";
         });
     
         SayHello("Maarten", myProvider);
     }
     
     public static void SayHello(string name, Func<string, string> provider)
     {
         Console.WriteLine("Hello, " + provider(name));
     }

     That should work fine when debugging. If not, would you have a minimal repro we can look at?

     • 

       M says:

       January 10, 2018

       Hi Maarten,

       Your example works for me in 2017.3. However, Rider won’t let you add a breakpoint if it’s an expression body.

       
       public static void Main(string[] args) => SayHello("Maarten", new Func(name =>
               {
                   // breakpoint here
                   if (!string.IsNullOrEmpty(name))
                   {
                       return name;
                   }
       
                   return "world";
               }));

       • 

         Maarten Balliauw says:

         January 10, 2018

         That’s a good find! I just logged an issue for you here: https://youtrack.jetbrains.com/issue/RIDER-12656

         • 

           M says:

           January 10, 2018

           Thanks Marteen!