Regression: No longer able to add public extensions to generic types in other modules

Originator:gordon
Number:rdar://19904918 Date Originated:20-Feb-2015 01:52 PM
Status:Open Resolved:
Product:Developer Tools Product Version:Swift 1.2
Classification:Serious Bug Reproducible:Always
 
Summary:
In Xcode 6.1, we were able to create public extensions for generic types that existed in external modules. For example, I could create a public extension on Optional or Array. In Xcode 6.2, this ability was taken away. This feels like an arbitrary restriction, since I can still create extensions on non-generic types from external modules. This restriction should be lifted, since it seriously limits the ability to add useful functionality to types built into the standard lib.

Steps to Reproduce:
1. Create an extension on String with a public function
2. Create an extension on Optional with a public function

Expected Results:
Both extensions are able to be compiled

Actual Results:
The extension on String can be compiled, but the extension on Optional throws an error

Regression:
This does not occur in Xcode 6.1

Comments


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