The closest thing I can think of outside of using funs or macros to define the usual `delay` and `force` operators, and that currently exists, would be somethin

The closest thing I can think of outside of using funs or macros to define the usual `delay` and `force` operators, and that currently exists, would be something like the QLC interface, which allows you to turn whatever you want into a type that can be used in list comprehensions and functional queries around it: http://www.erlang.org/doc/man/qlc.html http://www.erlang.org/doc/man/qlc.html