how is this array subtyping inside struct (bug?) possible?
mingwu at gmail.com
Mon Aug 10 18:33:58 UTC 2020
On Monday, 10 August 2020 at 15:36:35 UTC, Kagamin wrote:
> On Monday, 10 August 2020 at 13:44:17 UTC, Avrina wrote:
>> This really doesn't excuse why this bug is happening. Why is
>> writeln() using front() and popFront() that modifies the range
>> rather than simply using foreach()? Why is it modifying
>> something it knows to be a class? This is definitely a bug
>> that should be fixed. Not sure why people are trying to
>> explain it away, looking that the writeln implementation it is
>> completely convoluted. It's no wonder bugs like this are going
>> to happen.
> When writeln receives a reference type range, are you sure it
> shouldn't be consumed? How do you decide that?
Because `writeln` should be a *view* (i.e read-only) function, it
shouldn't *internally* call anything thing that change the data
Only the user can *explicitly* change the data, and let writeln
print it: e.g.
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