Swift: public readonly properties that are privately writable

Originator:apontious
Number:rdar://17166691 Date Originated:6/4/2014
Status:Closed Resolved:Duplicate/15747445
Product:Developer Tools Product Version:
Classification: Reproducible:
 
Summary:
rdar://17136480 and probably other bugs are already about adding access control to Swift, so that entire properties can be public, or private, or module-only; this bug is about allowing mixed publicly constant/privately writable properties.

Currently, in Obj-C, you can make the public interface of a class's property read-only, so other code can get at it but not change it (at least not without some fiddling), *AND* the private interface writable, so the class can continue to modify the value itself.

I use this all the time to preserve encapsulation.

Since Swift does not have this yet, I cannot write Swift code with the level of encapsulation I would like.

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