On 05/18/2015 10:52 AM, Steven Schveighoffer wrote:
> On 5/18/15 1:43 PM, Ali Çehreli wrote:
>> void main()
>> {
>> auto a = new int[20];
>> foo(a);
>> //can't now append to a
>
> Well, sure you can :)
>
> a ~= 5; // works fine
>
> But I understand you mean that an append to 'a' will reallocate
>
>> }
>>
>> void foo(const(int)[] p)
>> {
>> p ~= 42;
>> }
> BTW, the way to prevent this is to do something like:
>
> a) dup p on append
> b) const x = p; scope(exit) x.assumeSafeAppend();
Exactly! That recent discovery of mine made me come up with this
guideline: "Never append to a parameter slice."
No, I may not follow that guideline myself but it makes sense to me:
http://forum.dlang.org/thread/mi21dq$l6l$1...@digitalmars.com#post-mi739e:241v83:241:40digitalmars.com
Ali
