[swift-evolution] Proposal Idea: Use of == outside of comparisons should be treated as an error.

[John Randolph]

> On Jan 11, 2016, at 12:45 PM, Joe Groff via swift-evolution <swift-evolution at swift.org> wrote:
> 
> If it isn't already, the implementation of `==` ought to be marked with the `@warn_unused_result` attribute, which will give you a warning if the result is ignored. We're discussing making warn_unused_result the default behavior in another thread.
> 
> -Joe

I’d consider that warning sufficient to keep me from making this mistake.  Making it an error seems like overkill.

-jcr
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