On Fri, Jun 02, 2017 at 11:05:43PM +0000, Mark via Digitalmars-d-learn wrote:
[...]
> Stefan, what do you mean that it must be a template?
>
> Am I supposed to write template Struct(T) { class Stack { ... } }?
No, he means to turn class Stack into a template by adding a template
parameter to it, like I suggested.
In D, writing `class Stack(T) { ... }` is equivalent to writing:
template Stack(T) {
class Stack { ... }
}
It's the so-called eponymous template.
The reason you need a template here is because, unlike Java, D does not
do type erasure to achieve generic types. Full type information is
preserved, so Stack!int and Stack!string represent distinct,
incompatible types.
T
--
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