Is there a option that draws 'Composition' as uml?

[kickbell]

Is there a option that draws 'Composition' as uml?

[MarcoEidinger]

You can modify the output of this command-line tool to add compositions as PlantUML supports this notation.

@startuml
Foo *-- Bar
@enduml

would result in

But SwiftPlantUML will not auto-generate this for you because I did not implement the composition (or association) detection in Swift code.

This Swift code

public class Foo {
    private Bar bar = new Bar(); 
}

would result in the following PlantUML script generated by SwiftPlantUML command-line tool

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

class "Foo" as Foo << (C, DarkSeaGreen) >> { 
  -Bar() 
}
class "Bar" as Bar << (C, DarkSeaGreen) >> {  
}

@enduml

And you want

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

class "Foo" as Foo << (C, DarkSeaGreen) >> { 
  -Bar() 
}
class "Bar" as Bar << (C, DarkSeaGreen) >> {  
}

Foo *-- Bar

@enduml

Does this answer your question?

[kickbell]

yes, that's a really good answer. I'll try it out! 👍🏻

[AlexPerathoner]

Hi, are you planning on adding an option to detect Composition automatically? It'd be great to get insights regarding the coupling of the system, too

[MarcoEidinger]

Hi @AlexPerathoner, it's not on my short-term list as I am worried about performance & cluttering the diagram. If you wanna take a shot and prepare a PR then I am happy to reviewing it