• Tobias Pankrath (9/9) Dec 29 2021 I am trying to implement the builder pattern for some structs.
• Stanislav Blinov (3/4) Dec 29 2021 Perhaps use opDispatch?
• Tobias Pankrath (3/7) Dec 29 2021 That's a great idea and I'll look into it.
• Adam D Ruppe (3/4) Dec 29 2021 This is the default behavior of template mixins.

Tobias Pankrath <tobias pankrath.net> writes:

I am trying to implement the builder pattern for some structs. 
Currently I am auto implementing all methods by mixing them into 
the builder, but now I need some custom logic for some of the 
fields and I figured I just write them down by hand and mixin the 
rest.

I tried checking if it is contained in the FieldNameTuple, but 
that (understandably) creates a circular reference: 
https://run.dlang.io/is/Xih7yP

How do I mixin a function only if it is not already present?

Stanislav Blinov <stanislav.blinov gmail.com> writes:

On Wednesday, 29 December 2021 at 10:14:13 UTC, Tobias Pankrath 
wrote:

 How do I mixin a function only if it is not already present?

Perhaps use opDispatch?

Tobias Pankrath <tobias pankrath.net> writes:

On Wednesday, 29 December 2021 at 10:21:07 UTC, Stanislav Blinov 
wrote:
 On Wednesday, 29 December 2021 at 10:14:13 UTC, Tobias Pankrath 
 wrote:

 How do I mixin a function only if it is not already present?

 Perhaps use opDispatch?

That's a great idea and I'll look into it.

Adam D Ruppe <destructionator gmail.com> writes:

On Wednesday, 29 December 2021 at 10:14:13 UTC, Tobias Pankrath 
wrote:
 How do I mixin a function only if it is not already present?

This is the default behavior of template mixins.