Hello dear community!

I've met a little issue. How can I generate struct or class copying some fields and methods from another struct or class? I've found methods to get fields. They are std.traits.FieldNameTuple and std.traits.FieldTypeTuple but I can't find a method allows getting methods from struct or class.

Other words I want to get fields and methods by string values and copy them to my struct. Is it possible? Or do I want something strange?

Thanks in advance. Sorry if my English is not clear.

On 11/10/2017 12:37 PM, ANtlord wrote:
> Hello dear community!
> 
> I've met a little issue. How can I generate struct or class copying some fields and methods from another struct or class? I've found methods to get fields. They are std.traits.FieldNameTuple and std.traits.FieldTypeTuple but I can't find a method allows getting methods from struct or class.
> 
> Other words I want to get fields and methods by string values and copy them to my struct. Is it possible? Or do I want something strange?
> 
> Thanks in advance. Sorry if my English is not clear.

There is no way to get string versions of function bodies.

11.10.2017 14:37, ANtlord пишет:
> Hello dear community!
> 
> I've met a little issue. How can I generate struct or class copying some fields and methods from another struct or class? I've found methods to get fields. They are std.traits.FieldNameTuple and std.traits.FieldTypeTuple but I can't find a method allows getting methods from struct or class.
> 
> Other words I want to get fields and methods by string values and copy them to my struct. Is it possible? Or do I want something strange?
> 
> Thanks in advance. Sorry if my English is not clear.
You need a wrapper, but it would include all fields and methods from base struct/class and you just expose only that you need. So it's quite possible except I don't known how you can exclude needless fields.
But FieldNameTuple etc are not enough, your best friend is __traits(allMember, ...), iterating over its output and making decision what current symbol is and processing it according to its features. It's not trivial but not very complex.

If you just want to not repeat fields and methods you can use alias this or
mixins:
https://run.dlang.io/is/0UkjTe

On Wed, Oct 11, 2017 at 2:07 PM, drug via Digitalmars-d-learn < digitalmars-d-learn@puremagic.com> wrote:

> 11.10.2017 14:37, ANtlord пишет:
>
> Hello dear community!
>>
>> I've met a little issue. How can I generate struct or class copying some fields and methods from another struct or class? I've found methods to get fields. They are std.traits.FieldNameTuple and std.traits.FieldTypeTuple but I can't find a method allows getting methods from struct or class.
>>
>> Other words I want to get fields and methods by string values and copy them to my struct. Is it possible? Or do I want something strange?
>>
>> Thanks in advance. Sorry if my English is not clear.
>>
> You need a wrapper, but it would include all fields and methods from base
> struct/class and you just expose only that you need. So it's quite possible
> except I don't known how you can exclude needless fields.
> But FieldNameTuple etc are not enough, your best friend is
> __traits(allMember, ...), iterating over its output and making decision
> what current symbol is and processing it according to its features. It's
> not trivial but not very complex.
>