My understanding of naming:

* `new` - obvious constructor, may be empty (`String::new()`, `Box::new(T)`)
* `from_` - takes _same_ information as `new` just in different representation (e.g. `String::from_utf8(Vec<u8>)`)
* `with_` - takes _additional_ information along with what `new` takes `String::with_capacity(usize)`

I thought String was a bit of a special case but a quick look at the std lib shows its not. Perhaps conventions have changed for more recent code? I was under the impression that

• Constructors with zero args should use Default
• Constructors with one arg should use From<Foo> (unless the foo needs further restriction like the String;:from_utf8 case)
• Constructors with multiple args should use new.
• Constructors using the builder pattern should use with(self, foo: Foo)

I've never managed to work out the pattern for times when we need multiple constructors with multiple args?

Amusingly I was looking at all the instances of single arg constructors for Script yesterday wondering why they used the pattern new_.

I don't mean to bike shed here, I'm genuinely interested in these sorts of conventions.

Originally posted by @tcharding in #677 (comment)