Pro

Value Provider

Whenever value provider belongs to an object, it effectively becomes a property holder for this object.

Properties Framework

There are 4 types of standard properties:

• Pro - read only
• Pro.Mutable - read/write, aliased as Pro.M
• Pro.Observable - read/listenTo, aliased as Pro.O
• Pro.ObservableMutable - read/write/listenTo, aliased as Pro.OM

The inheritance graph looks like:

       Pro.O
      /      \
   Pro        Pro.OM
      \     /
       Pro.M

Here is an example of 'name' property definition hierarchy:

        trait Foo:                                     // 'name' is read only
          def namePro          : Pro[String]
          def name             : String = namePro()    // required shortcut

        trait Foo_M extends Foo:                       // 'name' is read/write
          def namePro          : Pro.M[String]
          def name_=(v:String) : Unit = namePro() = v  // required shortcut

        trait Foo_O extends Foo:                       // 'name' is read/listenTo
          def namePro          : Pro.O[String]

        trait Foo_OM extends Foo_O with Foo_M:         // 'name' is read/write/listenTo
          def namePro          : Pro.OM[String]

Note. The 'required shortcuts' must be implemented. They will not even show up in documentation, because they are assumed to be there