Error in generated output

[mohammad-rahchamani]

I tried to generate the diagrams for a large project. I couldn't see the result in my browser.
So, I tried saving the console report in a file and then running plantuml to get the diagram.
But not it gives me this error:
Error line 9428 in file: diagram.plant
and here is that line:
Handler<Void, [SelectedTenant]> <|-- FetchTenantHandler : inherits
Is there anything wrong with this line?

[MarcoEidinger]

Is there anything wrong with this line?

Yes, that is incorrect PlantUML syntax. What's the corresponding Swift code? I mean what's the Swift definition of Handler?

Generics are supported by SwiftPlantUML but my implementation might have a bug. The following simplified example

class Stack<Element> {}

class SpecificStack: Stack<Int> {}

will be generated correctly into PlantUML

@startuml
' STYLE START
hide empty members
skinparam shadowing false
' STYLE END


class "Stack" as Stack<Element> << (C, DarkSeaGreen) >> {  
}
class "SpecificStack" as SpecificStack<Int> << (C, DarkSeaGreen) >> {  
}
Stack <|-- SpecificStack : inherits

@enduml

and can then be visualized

[MarcoEidinger]

@mohammad-rahchamani can you tell the corresponding Swift code, i.e the Swift definition of Handler?

[mohammad-rahchamani]

@MarcoEidinger Thanks for the explanation.
Here is the Handler class definition:

open class Handler<T, S> {
    
    public init() { }
    
    open func handle(input: T, completion: @escaping (Result<S, Error>) -> Void) {
        fatalError("this method should be implemented in child class.")
    }
    
}

[MarcoEidinger]

@mohammad-rahchamani thanks, I am able to reproduce the issue with the following and will look into the root cause in the next couple of days

open class Handler<T, S> {
    public init() { }
    open func handle(input: T, completion: @escaping (Result<S, Error>) -> Void) {
        fatalError("this method should be implemented in child class.")
    }
}

class FetchTenantHandler: Handler<Void, [SelectedTenant]> {}

struct SelectedTenant {}

In the meanwhile you can fix the diagram manually by adjusting the PlantUML script from

class "Handler" as Handler<T\nS> << (C, DarkSeaGreen) >> { 
  +init()
  +handle(input:completion:) 
}
class "FetchTenantHandler" as FetchTenantHandler << (C, DarkSeaGreen) >> {  
}
Handler<Void, [SelectedTenant]> <|-- FetchTenantHandler : inherits

to

class "Handler" as Handler<T\nS> << (C, DarkSeaGreen) >> { 
  +init()
  +handle(input:completion:) 
}
class "FetchTenantHandler" as FetchTenantHandler<Void, [SelectedTenant]> << (C, DarkSeaGreen) >> {  
}
Handler <|-- FetchTenantHandler : inherits

which will result in

[mohammad-rahchamani]

That sounds wonderful.
I'll try the workaround.
Thank you.

[MarcoEidinger]

@mohammad-rahchamani you can also configure to ignore generics so that such information will not be shown (showGenerics:false). Then diagram generation should work without problems. See README and configuration section for details

[MarcoEidinger]

Found the root cause and I probably can release 0.7.4 with respective bug fix in the next 1-2 days

[MarcoEidinger]

@mohammad-rahchamani fix is available in 0.7.4. Homebrew update might still be pending if you check