2470 - allow overloading primitive operations

This turned out to be surprisingly easy: rather than try to specify the
types expected by each operation, just have primitive instructions go
through any other variants and only remain unnamed if no variants pass.

All I had to do was stop using contains_key() anywhere on Recipe_variants,
so that I could use get_or_insert() rather than get().

0 files changed, 0 insertions, 0 deletions