Variable-length delegates?

[bearophile via Digitalmars-d]

Is it a good idea to introduce in D a "fat delegate" that has a 
variable length (but its length is known at compile-time), able 
to contain two or more context pointers and/or one or more values 
or references, avoiding both some heap allocations of the closure 
and allowing coding patterns that require two or more context 
pointers?

Bye,
bearophile