[swift-evolution] [pitch] rename 'guard' to 'ensure'

[alessandro aresta]

Ensure is more comprehensible, guard is for sure "always" been there in
older languages... could it be kind of aliased somehow? I tend to confuse
guard sometimes, despite many few decades of using it.

On Wed, Oct 26, 2016 at 2:52 AM, Chris Lattner via swift-evolution <
swift-evolution at swift.org> wrote:

>
> > On Oct 25, 2016, at 10:20 AM, Joe Groff via swift-evolution <
> swift-evolution at swift.org> wrote:
> >
> > At this point in Swift's evolution, source-breaking changes to the
> language require strong motivation. We can't really entertain superficial
> keyword changes like this without overwhelming evidence that the existing
> syntax is problematic in practice. `guard` has precedent in functional
> languages, for instance in Haskell where the `guard` function is
> idiomatically used as part of monadic `do`-notation computations, and has
> the same positive condition semantics in those languages.
>
> Right.  Jay, I’m sorry if you or others find the name “guard” to be
> confusing, but there are many Swift developers that like it.  I is almost
> inconceivable that we would change it at this point.
>
> -Chris
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>



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