[swift-dev] Marking a function as __attribute__((weak))

[Joe Groff]

> On Mar 6, 2017, at 7:10 PM, Philippe Hausler via swift-dev <swift-dev at swift.org> wrote:
> 
> 
> 
> On Mar 6, 2017, at 5:59 PM, Greg Parker <gparker at apple.com <mailto:gparker at apple.com>> wrote:
> 
>> 
>>> On Mar 6, 2017, at 5:48 PM, Philippe Hausler via swift-dev <swift-dev at swift.org <mailto:swift-dev at swift.org>> wrote:
>>> 
>>> Is there a way to mark a function in swift (on Linux) to use the same emission strategy as weak declarations in c? 
>>> 
>>> I was to tinkering with some ideas on fixing some poor behavior in swift-corelibs-foundation and weak would potentially solve this specific case.
>>> 
>>> For reference this is the syntax I am interested in (since it is a bit obscure) https://en.m.wikipedia.org/wiki/Weak_symbol <https://en.m.wikipedia.org/wiki/Weak_symbol>
>> Weak definitions are expensive. What are you trying to do?
>> 
> 
> I was trying to prototype some fixes for factory pattern initializers. The other strategy that I was considering was using hoisting of functions to init methods but that didn't seem to work with disparate types. This wasn't really intended to be a real solution but more so a proof of concept.

Could you be more specific about how you're trying to apply weak definitions to the problem?

-Joe
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