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.

Reply via email to