DECLARE_DYNAMIC_MULTICAST_DELEGATE error: no storage class or type specifier

Development Programming & Scripting C++
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1

Hi, im using 4.20 and im having trouble creating blueprint event.
Specifically when I’m trying declare a delegate

DECLARE_DYNAMIC_MULTICAST_DELEGATE(FOnOpenRequest);

I get an error “this declaration has no storage class or type specifier”.

I tried to compile it first in the unreal editor, build the project in different configurations (debug, dev editor etc…), reopen VS and UE, include Delegate.h.

Later on when I declare the UPROPERTY:

UPROPERTY(BlueprintAssignable)
FOnOpenRequest OnOpenRequest;

I get an error of “FOnOpenRequest is undefined”.

I have no idea if I’m doing something wrong or its a bug, I’m new to UE.
Thanks in advance.

Edit: Both of the errors I noticed are IntelliSense errors because the program compiles, but they are leading to compilation error when in the .cpp file I try to

OnOpenRequest.BroadCast();

which says: error C2039: ‘BroadCast’: is not a member of ‘FOnOpenRequest’.

Solution: The problem was uppercase ‘C’ instead of lower case in the Broadcase();. The problematic intellisense won’t do auto completion.

2

Are you including declaration to the file where you are trying to create a variable?
Have you tried regenerate projects file? (right click on .uproject file)

3

#include "Delegates/Delegate.h"

4

MyDelegate.h

#include "CoreMinimal.h"
DECLARE_DYNAMIC_MULTICAST_DELEGATE(FOnOpenRequest);

AnotherFile.h

#include "MyDelegate.h"

UPROPERTY(BlueprintAssignable)
FOnOpenRequest OnOpenRequest;
5

Afaik you don’t need to add a semicolon after the declare delegate’s closing paranthese. Not sure if that’s the problem

6

Also is the error on compilation or just the vs coz vs often flags UHT stuff as error but compiler runs fine

7

The first error: “this declaration has no storage class or type specifier”, is intellisense only. It gets compiled both in the VS and UE.
But the second one is compilation “FOnOpenRequest is undefined”.

8

Yea, I did try that to no avail.

9

Yea, i have a feeling its maybe something with the includes but I did include “Delegates/Delegate.h” and also #include “CoreMinimal.h”.
Both the delegate declaration and the UPROPERTY are in the same .h file in my project.

10

Actually you do need it or you will get “Missing ‘;’ before UCLASS” (atleast in my code cuz thats what after it)

11

Yes, you are right. both errors were intellisense, I had a problem with spelling BroadCast() instead of Broadcast, didn’t notice because no auto completion of intellisense.

12

For anybody having this problem:

#include "Delegates/Delegate.h"

Then switch the solution configuration to anything (e.g. Development Editor to Development Client), then switch it back to the original, and the Intellisense should work again.

1 Like
13

not working

14

It’s because there is not <Your Signature>.BroadCast() . There is no capital ‘C’. It should be <Your Signature>.Broadcast().

15

I was honestly just trying to make a completly standard Event Dispatcher.
Yet this is the method that pops up as the suggested one. A dynamic multicast is not required for most cases. Read more in this discussion…

My solution: Drop the DYNAMIC and it works (including delegate.h was not nessesary).

DECLARE_MULTICAST_DELEGATE(FMyName)
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16

This is what worked for me

17

I met the same error, and change DECLARE_MULTICAST_DELEGATE to DECLARE_DYNAMIC_MULTICAST_DELEGATE. It works, I don’t know why.

18

Trying to compile without semi-colon and then with it again fixed intellisense for me.

1 Like