Support parameterized class in classDiagram

[benfortuna]

Proposal

UML provides a syntax for type binding via parameterized class:

http://etutorials.org/Programming/UML/Chapter+6.+Class+Diagrams+Advanced+Concepts/Parameterized+Class/

This proposal seeks to be able to add a label on a relationship using the following syntax:

ClassA~T~ <|-- ClassB: <<bind>>T::String

In this example the type String is bound to generic type T for implementation ClassB.

Currently this is a syntax error due to not supporting <<>> and :: in labels.

Example

ClassA~T~ <|-- ClassB: <<bind>>T::String

Screenshots

No response

[jgreywolf]

There are a couple of issues here:

• << >> is already used as syntax for associations.
• < and > are problematic by themselves due to potential of script injection, which is why we ended up using ~ ~ to signify generics.
• :: is already being used as shorthand to associate a node with a class

From the link you provided there are two ways that this can be displayed, one is similar to what we already support, such as: ClassA<ClassB>, displayed without any members

I am thinking that since this is an alternative method for displaying parameterized classes the priority of adding this is fairly low, but that could be changed based on requests ;)

[benfortuna]

Ok.

So I guess what you are saying is in defining a bound implementation (i.e. ClassB<String>) it is implying that String is substituted for T defined in members of the superclass/interface (ClassA)?

i.e. ClassA~T~ <|-- ClassB~String~

Not ideal, but I accept there are challenges in supporting the additional syntax. Thanks for following up.