Strange casting error when using lamdas

Steven Schveighoffer schveiguy at
Thu Dec 5 15:47:25 UTC 2019

On 12/5/19 3:57 AM, Robert M. Münch wrote:
> On 2019-12-04 19:23:07 +0000, Steven Schveighoffer said:
>> Is one a delegate and one a function pointer? This can easily happen 
>> for untyped lambdas.
> That's a very good point and hint. A function pointer will be 8LU and a 
> delegate 16LU, right? This is a strong argument that this is really the 
> problem.
> How can I find out? That's why I used a pragma to get the type of the 
> alias. So, the alias needs to become a delegate. No clue how to write 
> this down.

Use std.functional.toDelegate. If it's already a delegate, it just 
returns the delegate, otherwise it makes a delegate out of a function 


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