Optional monitors suggestion

[bearophile via Digitalmars-d]

Yuriy:

> 2. class may be defined with @__monitor attribute, in which 
> case a __monitor variable will be added to it's beginning.

I'd like to know why you think D classes should not have the 
monitor on default (this means why you don't plan for a 
@no_pointer).

Currently D classes have that pointer on default, so I think the 
exchange of the default should be justified with an explanation.

Most D classes are currently allocated on the heap by the D GC 
that has a minimal allocation size, so the save in memory is 
small.

Bye,
bearophile