Soroush’s proposal has the idea that maybe we could do multiple blocks for this
scenario, like so:
guard try something(), let thing = optionalThing catch {
// try something() failed
} else {
// the let-binding failed
}
🤔 Alternatively, what if the “error” captured was optional in this scenario?
guard try something(), let thing = optionalThing catch {
if let error = error {
// the try call failed
} else {
// the optional binding failed
}
}
Dave
> On Jul 5, 2017, at 12:00 PM, Jon Shier via swift-evolution
> <swift-evolution@swift.org> wrote:
>
> I didn’t think I was going to like it but I really do. My only concern,
> which isn’t really a deal breaker, is what it would look like to chain
> multiple try and let statement in the same guard. Unless that scenario works
> well I don’t think you could convince others. i.e. In the case where I have:
>
> guard try something(), let thing = optionalThing catch { }
>
> What happens when the let fails? No implicit error?
>
>
>
> Jon
>
>
>> On Jul 5, 2017, at 1:30 PM, Soroush Khanlou via swift-evolution
>> <swift-evolution@swift.org <mailto:swift-evolution@swift.org>> wrote:
>>
>> I’d like to propose a guard/catch construct to the language. It would allow
>> code to use throwing functions and handle errors fully, without straying
>> from a happy path. do/catch can be a bit heavy-handed sometimes, and it
>> would be nice to be able to handle throwing functions without committing to
>> all the nesting and ceremony of do/catch.
>>
>> Full proposal, which discusses all the corner cases and alternatives:
>> https://gist.github.com/khanlou/8bd9c6f46e2b3d94f0e9f037c775f5b9
>> <https://gist.github.com/khanlou/8bd9c6f46e2b3d94f0e9f037c775f5b9>
>>
>> Looking forward to feedback!
>>
>> Soroush
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>
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