Hmm... probably worth filing a bug at https://bugs.swift.org
<https://bugs.swift.org/> then with the below test case.
Alex
> On 22 Sep 2017, at 10:14, Martin R <martinr...@gmail.com> wrote:
>
> But the purpose of
>
> func dividedReportingOverflow(by other: Int
> <apple-reference-documentation://hsf4N66ABq>) -> (partialValue: Int
> <apple-reference-documentation://hsf4N66ABq>, overflow: Bool
> <apple-reference-documentation://hsvynwdxKM>)
>
> is to report an overflow in the return value. And actually this compiles and
> runs in Xcode 9 if the code is on top-level in main.m:
>
> let minusOne = -1
> let r1 = Int.min.dividedReportingOverflow(by: minusOne)
> print(r1) // (partialValue: -9223372036854775808, overflow: true)
>
> let zero = 0
> let r2 = Int.min.dividedReportingOverflow(by: zero)
> print(r2) // (partialValue: -9223372036854775808, overflow: true)
>
> But the same code inside a function (or do-block) fails to compile:
>
> func foo() {
> let minusOne = -1
> let r1 = Int.min.dividedReportingOverflow(by: minusOne)
> // error: division '-9223372036854775808 / -1' results in an overflow
> print(r1)
>
> let zero = 0
> let r2 = Int.min.dividedReportingOverflow(by: zero)
> // error: division by zero
> print(r2)
> }
>
> Martin
>
>
>> On 22. Sep 2017, at 10:19, Alex Blewitt via swift-users
>> <swift-users@swift.org <mailto:swift-users@swift.org>> wrote:
>>
>> Int.min is the smallest negative value, and Int.max is the largest positive
>> value (that fits in an Int). However, the absolute value of Int.min is
>> larger than the absolute value of Int.max. So you can't convert Int.min into
>> -Int.min because it's larger than Int.max.
>>
>> In other words, this is expected behaviour :)
>>
>> For example:
>>
>> Int.min + Int.max = 1
>>
>> If they were the same value, it would be zero.
>>
>> Alex
>>
>>> On 22 Sep 2017, at 02:42, Peter W A Wood via swift-users
>>> <swift-users@swift.org <mailto:swift-users@swift.org>> wrote:
>>>
>>> Entering the following statement in a playground gives an overflow error.
>>> Where should I report this?
>>>
>>> Statement:
>>>
>>> Int.min.dividedReportingOverflow(by:-1)
>>>
>>> Playground log:
>>>
>>> Playground execution failed:
>>>
>>> error: MyPlayground.playground:3:9: error: division '-9223372036854775808 /
>>> -1' results in an overflow
>>> Int.min.dividedReportingOverflow(by:-1)
>>>
>>> Peter
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>>> https://lists.swift.org/mailman/listinfo/swift-users
>>> <https://lists.swift.org/mailman/listinfo/swift-users>
>>
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>
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