[icu-design] ICU4C 61 API Proposal: Change NumberFormatter adopt methods to non-const pointers

[Shane C. <sf...@go...>]

*Dear ICU team & users,I would like to propose the following API changes
for: ICU 61Please provide feedback by: 2018-02-13Designated API reviewer:
MarkusTicket: http://bugs.icu-project.org/trac/ticket/13587
<http://bugs.icu-project.org/trac/ticket/13587>There are three methods in
NumberFormatter that adopt a pointer to an object.  The original proposal
of these methods was for them to take non-const pointers as arguments.
However, Markus noted that other ICU APIs usually take non-const pointers.
I therefore propose changing the three NumberFormatter methods to also take
non-const pointers.  The methods being changed are:Derived
adoptSymbols(NumberingSystem *symbols) const;Derived
adoptUnit(icu::MeasureUnit *unit) const;Derived
adoptPerUnit(icu::MeasureUnit *perUnit) const;The third one is @draft 61
from an earlier API proposal (#13520), and the first two are @draft
60.-Shane*