Emmanuel Briot has published an interesting extension to my usual guidelines (happily stolen from the Quality and Style Guide) on declaring tagged types.
Basically the pattern is (in my version):
subtype Parent is Parent_Type_Package.Instance; type Instance is new Parent with private; subtype Class is Instance'Class; type Reference is access all Class; -- Optional, only if you really need access types |
What do you think of it?
And do you prefer Emmanuel’s naming style or mine?
