2432 - first stab at making ingredients immutable

The rule is, an address ingredient is only modifiable if:
  a) it's also a product
  b) it's /contained-in some other ingredient+product

Only if an ingredient is a modifiable can you:
  a) call get-address or index-address on it (the only way to write to it)
  b) call other recipes that also return it in a product

I still don't check copies of the address. That's next.

Core mu passes this check, but none of the example apps do. edit/ and
sandbox/ are known to fail.

0 files changed, 0 insertions, 0 deletions