[swift-evolution] Proposal: Universal dynamic dispatch for method calls

[Brent Royal-Gordon]

> Yet, to me, `(self as P).f()`, targeted to the struct writer who has read the doc because he has a feature to write, looks odd, but less dangerous than a public _f function that is available to the struct user who *has not read the manual*. People don’t read the doc unless they have a strong need for it.

You don’t have to read the manual to know that you keep your mitts off something with an `_` prefix unless you know what you’re doing.

-- 
Brent Royal-Gordon
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