petdance/scratch — Issue #919: Limit the required interface for PMCs
Author: petdance
Created: 2011-11-14 06:14:00+00:00
State: open
Labels: bug, Pri-normal, Sev-medium

```
In the pdd03 design document there is the todo item (with context):

=item 5 C (P only)

If this bit is set on a PMC value, then the PMC must be an aggregate. The
contents of the aggregate, rather than the aggregate itself, will be passed.

If the C bit is also set, the aggregate will be used as a hash; its
contents, as key/value pairs, will be passed as named parameters. The PMC
must implement the full hash interface. {{ TODO: Limit the required
interface. }}

What is the required interface? How should it be limited? This, I
suspect, needs to be discussed and decided upon, and then documented
in the PDD.
```

Originally reported in http://rt.perl.org/rt3/Ticket/Display.html?id=45367

Originally http://trac.parrot.org/parrot/ticket/1288 by @coke