Re: icu4c api proposal: clone() for public c++ classes where missing

I have got a list of classes now -

I propose to add clone() functions (and copy constructors/assignment operators where missing) to the 
following classes and their subclasses:

(common)
- ForwardCharacterIterator
   This one is a base class to CharacterIterator.
   FwdCI has no clone() but CI does, and it returns a CI*.
   I propose to add the one function FwdCI *FwdCI::clone().
- Locale
- ParsePosition
- ResourceBundle
- StringEnumeration

(i18n)
- CollationKey
- FieldPosition
- Formattable
- StringSearch

I propose to _not_ add clone() functions to the following classes because they forbid copying of any 
kind:

(common)
- CanonicalIterator
- UnicodeSetIterator

(i18n)
- RegexMatcher

markus