Hi,
is there any document or text describing forward references?
It is kinda strange, i implemented a list structure which is kinda like this:

struct list(T)
{
private:

struct node
{
T val;
node* next;
node* prev;
}

node* head;
node* last;
size_t size;

 .....
}

The thing is when i implement following struct:

struct Tre
{
list!Tre a;
}

theoretically it should be constructable. But it gives me out a compiler error about Forward reference. Ok maybe the compiler at this point cant do that but ...

The strange thing is i somehow managed earlier without knowing to do exactly this in a much more complicated struct.
Can somebody enlighten me about this?

works for me with 2.076.

On 2/25/18 4:25 PM, Jiyan wrote:
> Hi,
> is there any document or text describing forward references?
> It is kinda strange, i implemented a list structure which is kinda like this:
> 
> struct list(T)
> {
> private:
> 
> struct node
> {
> T val;
> node* next;
> node* prev;
> }
> 
> node* head;
> node* last;
> size_t size;
> 
>   .....
> }
> 
> The thing is when i implement following struct:
> 
> struct Tre
> {
> list!Tre a;
> }
> 
> theoretically it should be constructable. But it gives me out a compiler error about Forward reference. Ok maybe the compiler at this point cant do that but ...
> 
> The strange thing is i somehow managed earlier without knowing to do exactly this in a much more complicated struct.
> Can somebody enlighten me about this?

Looks like this was fixed in 2.064.

What version of the compiler are you using?

-Steve

On Sunday, 25 February 2018 at 22:20:13 UTC, Steven Schveighoffer wrote:
> On 2/25/18 4:25 PM, Jiyan wrote:
>> [...]
>
> Looks like this was fixed in 2.064.
>
> What version of the compiler are you using?
>
> -Steve

2.077.0

It is really strange, it works now but there still seems to be some strangeness about forward references.

Thanks till now i guess :P

On 2/25/18 6:53 PM, Jiyan wrote:
> On Sunday, 25 February 2018 at 22:20:13 UTC, Steven Schveighoffer wrote:
>> On 2/25/18 4:25 PM, Jiyan wrote:
>>> [...]
>>
>> Looks like this was fixed in 2.064.
>>
>> What version of the compiler are you using?
>>
>> -Steve
> 
> 2.077.0
> 
> It is really strange, it works now but there still seems to be some strangeness about forward references.

There are frequently issues with forward references. They are supposed to always work, but it's not always the case.

-Steve