...try and override it as well, and delegate to your overload that deals directly with...

...preview=in` should allow array literals and delegate
                    literals in a `@nogc` context
           Product: D...

...bool delegate(S item) predicate)`
iterable.d(23,13):                        `filter(S)(S[] source, bool delegate...

...createCounter(int nextValue) => delegate () => nextValue++ ;
```

Explicit return must be specified after "delegate" keyword

```d
auto...

...a delegate, as it doesn't close over any variables. It returns a delegate as...

...put the `delegate` keyword in front of the function literal:

```d
auto createCounter = delegate (int...

...a function returning a delegate
auto createCounter(int nextValue) => auto delegate() => nextValue++;

// this is a...

...is a delegate:

```
'typeof(createCounter).string' is int delegate() pure nothrow @nogc @safe delegate(int...

...msg, typeof(Counter)); // pure nothrow @safe int delegate() pure nothrow @nogc @safe(int nextValue)
enum...

...the signature of next:
```
'next' is int delegate() pure nothrow @nogc @safe
```

second writeln shows...