[KyleGoetz]

The なる in MMM's sentence and Nagoyankee's translation raised a new question in my mind:

名詞になる
名詞となる

These have the same meaning (to become SOME NOUN), but the former is a more gradual change, and the latter is more instantaneous change.

How do you do this with adjectives? Is it possible?
嬉しくなる
嬉しいとなる
Is the latter grammatically correct? I can't recall ever seeing such a construction, but I don't necessarily know a reason why it wouldn't be correct. I was always taught い形容詞＋に becomes い形容詞く. I never received similar instruction for い形容詞＋と.