Question about eponymous template trick

2014-11-03 Thread Uranuz via Digitalmars-d-learn 

I have an example of code like this:

template Node(String)
{
struct Node {}
struct Name {}
struct Attr {}

}

void main()
{
alias MyNode = Node!(string).Node;
alias MyName = Node!(string).Name;
alias MyAttr = Node!(string).Attr;

}

This code fails during compilation with message:

Compilation output:

/d228/f410.d(12): Error: no property 'Node' for type 
'Node!string' /d228/f410.d(12): Error: no property 'Node' for 
type 'Node!string' /d228/f410.d(13): Error: no property 'Name' 
for type 'Node!string' /d228/f410.d(13): Error: no property 
'Name' for type 'Node!string' /d228/f410.d(14): Error: no 
property 'Attr' for type 'Node!string' /d228/f410.d(14): Error: 
no property 'Attr' for type 'Node!string'


So question is: is this intended behaviour and I'm missing 
something about eponymous templates? Or is it a bug in compiler?

Re: Question about eponymous template trick

2014-11-03 Thread MrSmith via Digitalmars-d-learn 

On Monday, 3 November 2014 at 14:07:55 UTC, Uranuz wrote:

I have an example of code like this:

template Node(String)
{
struct Node {}
struct Name {}
struct Attr {}

}

void main()
{
alias MyNode = Node!(string).Node;
alias MyName = Node!(string).Name;
alias MyAttr = Node!(string).Attr;

}

This code fails during compilation with message:

Compilation output:

/d228/f410.d(12): Error: no property 'Node' for type 
'Node!string' /d228/f410.d(12): Error: no property 'Node' for 
type 'Node!string' /d228/f410.d(13): Error: no property 'Name' 
for type 'Node!string' /d228/f410.d(13): Error: no property 
'Name' for type 'Node!string' /d228/f410.d(14): Error: no 
property 'Attr' for type 'Node!string' /d228/f410.d(14): Error: 
no property 'Attr' for type 'Node!string'


So question is: is this intended behaviour and I'm missing 
something about eponymous templates? Or is it a bug in compiler?


Looks like compiler looks for Node, Name and Attr in Node struct, 
because of eponymous thing.

This code works though:

template N(String)
{
struct Node {}
struct Name {}
struct Attr {}

}

void main()
{
alias MyNode = N!(string).Node;
alias MyName = N!(string).Name;
alias MyAttr = N!(string).Attr;

}

Re: Question about eponymous template trick

2014-11-03 Thread Uranuz via Digitalmars-d-learn 
Looks like compiler looks for Node, Name and Attr in Node 
struct, because of eponymous thing.


I understand it but I want to know if it is documented behaviour 
or not. Could anybody clear what happens with eponymous stuff and 
why I can't get acces to *other* declarations inside eponymous 
template? I guess that it is not intended behaviour.

Re: Question about eponymous template trick

2014-11-03 Thread Ali Çehreli via Digitalmars-d-learn 

On 11/03/2014 06:36 AM, Uranuz wrote:

Looks like compiler looks for Node, Name and Attr in Node struct,
because of eponymous thing.


I understand it but I want to know if it is documented behaviour or not.
Could anybody clear what happens with eponymous stuff and why I can't
get acces to *other* declarations inside eponymous template? I guess
that it is not intended behaviour.



I think it's the intended behavior. I think documentation is outdated.

Ali

Re: Question about eponymous template trick

2014-11-03 Thread Uranuz via Digitalmars-d-learn 
I think it's the intended behavior. I think documentation is 
outdated.


Ali


Thanks. So I will modify my programme to workaround this.

Re: Question about eponymous template trick

2014-11-03 Thread Uranuz via Digitalmars-d-learn 
Also I failed to find any documentation about eponymous stuff in 
language reference. As far as I remember it was here but now 
looks like it is missing.

Re: Question about eponymous template trick

2014-11-03 Thread Sean Kelly via Digitalmars-d-learn 

On Monday, 3 November 2014 at 14:58:03 UTC, Ali Çehreli wrote:


I think it's the intended behavior. I think documentation is 
outdated.


Both forms should really work though.  I had always thought that 
the short form was simply possible if the names matched.

Re: Question about eponymous template trick

2014-11-03 Thread Steven Schveighoffer via Digitalmars-d-learn 

On 11/3/14 9:07 AM, Uranuz wrote:

I have an example of code like this:

template Node(String)
{
 struct Node {}
 struct Name {}
 struct Attr {}

}

void main()
{
 alias MyNode = Node!(string).Node;
 alias MyName = Node!(string).Name;
 alias MyAttr = Node!(string).Attr;

}

This code fails during compilation with message:

Compilation output:

/d228/f410.d(12): Error: no property 'Node' for type 'Node!string'
/d228/f410.d(12): Error: no property 'Node' for type 'Node!string'
/d228/f410.d(13): Error: no property 'Name' for type 'Node!string'
/d228/f410.d(13): Error: no property 'Name' for type 'Node!string'
/d228/f410.d(14): Error: no property 'Attr' for type 'Node!string'
/d228/f410.d(14): Error: no property 'Attr' for type 'Node!string'

So question is: is this intended behaviour and I'm missing something
about eponymous templates? Or is it a bug in compiler?


This is troubling. So you can never access struct Name inside there? 
This USED to work IIRC, but then again, the eponymous trick only used to 
work if there was only one member in the template.


-Steve