C#C
C#•2y ago
Verdur

Check whether list of generics contains a type, that implements interface

Hello, I need to perform sophisticated generic type constraint.
I have following class to store multiple generics in my class, they are added to class after each method call:
interface ICons<TLeft, TRight> {}

And after calling few methods I get following type:
class Builder<T> { ... }

Builder<ICons<IWithBar, ICons<IWithFoo, IUninitialized>> builder = new Builder().Foo(...).Bar(...);

I have a function that accepts Builder<IConst<TLeft, TRight>> and I need generic constraint that will accept only those Builder's, which have both IWithFoo and IWithBar somewhere inside their IConst<TLeft, TRight>.
Something like this:
void Build<TLeft, TRight>(Builder<ICons<TLeft, TRight>> builder)
where "TLeft or TRight contain somewhere inside them IWithFoo and IWithBar"
{ ... }


I tried another approach where I specified that Build<T> accepts T where T : IWithBar, IWithFoo, but that would require ICons<TLeft, TRight> to implement TLeft and TRight, which I was answered is not possible (here: helpInterface implementing generic parameters)
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