I have a couple of questions related to the following code:
https://gist.github.com/Jaffe-/b027287a884fc2e173a65601ec242676
1) This is a very simplified example, but what I'm trying to do
here is to call `foo` on each object in `Container.ss` contains
when `foo` is called, and likewise for `bar`. To do this without
having to repeat the foreach loop in every member function, I
made the `call_for_each` template. However, I found no other way
to pull this off (without using string mixins) than to also add
the `call` template in the S struct. At first I thought it would
be possible to write `s.func(args)` in `call_for_each`, but that
will try to look up func as a member in the struct.
Is there a more common / idiomatic way of doing this? In C++ this
would be solved by using a member function pointer as a template
argument, but as far as I understand D uses delegates (which are
already bound to an instance) instead?
2) This is about the reduce templates. As I've commented, I can't
use a template lambda with reduce, but I can use a lambda taking
ints as arguments. Why is this? The error message I get when
using the template lambda is:
"template instance reduce!((a, b) => a + b) cannot use local
'__lambda1' as parameter to non-global template reduce(alias
fun)()"
- Forwarding calls to objects of an... Johan Fjeldtvedt via Digitalmars-d-learn
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