Ok thanks, and what about the initial topic of this thread, ie stuff like
this:
func f() {
1; "two"; 3.0
[4, 5]; 6 * 7
print("No warnings or errors!")
}
f() // No warnings or errors!
Should I file a bug for that too or is this by design / has this been
discussed somewhere already?
On Tue, Dec 15, 2015 at 11:54 PM, Dave Abrahams <[email protected]> wrote:
>
> On Dec 14, 2015, at 11:04 AM, Jens Persson via swift-dev <
> [email protected]> wrote:
>
> Yes, and I don't know if there is any particular reason why the ==
> operator for Int doesn't have @warn_unused_result while the one for Doubles
> has:
>
> func f() { 1 == 2 } // OK
> func g() { 1.0 == 2.0 } // Warning: Result of call '==' is unused
>
>
> That’s an oversight; please file a radar!
>
>
> On Mon, Dec 14, 2015 at 7:40 PM, Johan Jensen <[email protected]> wrote:
>
>> Because currently only unused variable/constant declarations have
>> warnings/fix-its attached to them.
>> There have been some discussion on making non-void functions warn of
>> unused results
>> <https://lists.swift.org/pipermail/swift-evolution/Week-of-Mon-20151207/001580.html>
>> and it’s possible that this would be in style with that.
>> Perhaps (basically) empty statements should also give a warning?
>>
>> —Johan
>>
>> On Mon, Dec 14, 2015 at 7:08 PM, Jens Persson via swift-dev <
>> [email protected]> wrote:
>>
>>> func ok() {
>>> let s = "see"; "Why are there exactly "
>>> 0 == 0 * 42
>>> "warnings and errors in this code"
>>> let t = s + "?"
>>> print(t)
>>> }
>>> ok() // see?
>>>
>>>
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>>
>
>
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>
> -Dave
>
>
>
>
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