dotnet/roslyn

@YairHalberstadt
Yes, here is an example:

    public static TOut Pattern<TIn,TOut>(Attributes attributes) => (TIn input) =>
    {
        var result = new TOut();

        foreach (var attribute in attributes)
            if (attribute.IsEnum())
                attribute.Assign(result, input);

        return result;
    }

    public static Person Example(Student person)
    {
        var result = new Person();

        result.Degree = __.GivenField(person.Degree.ToString(), a.IsEnum());

        return result;
    }

In sample we can use an example object (not to write generic). __.GivenField Is just a type preserving function, which also has room for an expression tree. The expression tree is used to determine the kind of code generation to be used. And would match the pattern above. The idea is that the pattern implementation code, will always be harder to read. While the example code should be much easier. I think this could be a good thing to try.