This feature request is probably one for swift evolution.
I like the idea in theory, but I’d prefer to see the return value
identifier being spelled out, i.e. “returnValue” instead of the symbols.
Jun Zhang via swift-users <swift-users@swift.org> schrieb am Mo. 9. Okt.
2017 um 05:37:
> Yes that's true, but this requires me to set a return value in every
> `early return` statement. I think this should be done by the compiler
> instead of me, to make code cleaner and also less error-prone.
>
> On Mon, Oct 9, 2017 at 11:24 AM, Slava Pestov <spes...@apple.com> wrote:
>
>> I think you can achieve what you want by having the ‘defer’ block capture
>> a mutable local variable. Eg,
>>
>> func doStuff() {
>> var success = false
>>
>> defer {
>> if !success {
>> // do some additional cleanup
>> }
>> }
>>
>> …
>> success = true
>> …
>>
>> return result
>> }
>>
>> On Oct 8, 2017, at 7:34 PM, Jun Zhang via swift-users <
>> swift-users@swift.org> wrote:
>>
>> Hi dear swift developers,
>> I am kind of new to swift and I don't know if this feature already
>> exists. And if it exists already please tell me how. Thank you very much!
>> The feature is to capturing the return value (maybe input value also)
>> of the function. Here is the demo code:
>>
>> func tableView(_ tableView: UITableView, numberOfRowsInSection
>> section: Int) -> Int {
>> defer {
>> if $> >= 0 {
>> // table is not empty
>> }
>> else {
>> // table is empty
>> }
>> }
>> return dataSource.cout
>> }
>>
>> I suggest using `$>` as the return value symbol and `$<` as the input
>> parameter symbol.
>>
>>
Also, I’m not sure what “input parameter” means here.
Geordie
Thank you all and best regards to you!
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>> swift-users@swift.org
>> https://lists.swift.org/mailman/listinfo/swift-users
>>
>>
>>
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