On Saturday, 10 September 2022 at 18:38:40 UTC, Ali Çehreli wrote:
On 9/10/22 09:33, Erdem Demir wrote:
> DListOfA returnVal = temp.require("a",
DListOfA());--> I wish I
> could use ref DListOfA here
But keeping a reference to a temporary would not work because
the life of that temporary ends by the end of that expression
(practically, at the semicolon).
An option is to allocate the object dynamically with new (and
store DListOfA* in the associative array). Then the GC would
keep it alive as long its pointer was in the associative arrray.
But a better option is to just forget about it because D
already takes care of rvalues by blitting (bit-level copying)
them by default. Everything just works... :) It is not
expensive either. For example, your struct is very cheap to
copy.
But I am probably missing the reason why you want a ref there.
Perhaps there are even better options.
Ali
In the code sample I posted I need returnVal.insert(a); have an
effect on DListOfA[string] temp; but if returnVal is a rvalue
copy I can't accomplish this right?
I see your point about ref would have been assign to a temp val,
thanks for pointing out.
