Alias template parameters and runtime functions

[Peter Alexander]

This post has two questions:

1. What are the semantics of 'alias' template parameters when initialised using runtime functions,
e.g.:

class Foo
{
  int[] data;

  int foo(int i) { return data[i]; }

  auto allFoo()
  {
    auto fun = (int i) { return foo(i); };
    // alternatively: auto fun = &this.foo; (same result)
    return map!(fun)(iota(data.length));
  }
}

This compiles, but gives you an access violation when you try to use it. Alias is a compile time
construct (if I am not mistaken), so why does the compiler allow this?

2. How can I achieve what allFoo() above is trying to do? Obviously I could just return data in this
trivial case, but imagine that foo(int) did something more complex, and I didn't want to repeat the
logic of foo(int) in allFoo().

Thanks.