On Saturday, 5 August 2017 at 18:19:05 UTC, Stefan Koch wrote:
On Saturday, 5 August 2017 at 18:17:49 UTC, Simon Bürger wrote:
If a lambda function uses a local variable, that variable is
captured using a hidden this-pointer. But this capturing is
always by reference. Example:
int i = 1;
auto dg = (){ writefln("%s", i); };
i = 2;
dg(); // prints '2'
Is there a way to make the delegate "capture by value" so that
the call prints '1'?
Note that in C++, both variants are available using
[&]() { printf("%d", i); }
and
[=]() { printf("%d", i); }
respectively.
No currently there is not.
and it'd be rather useless I guess.
You want i to be whatever the context i is a the point where you
call the delegate.
Not at the point where you define the delegate.
