Yay! New language/Cargo features!

[SimonSapin]

Is anyone interested in reviewing this? (Recommended by commit rather than by file.) If not, I’ll just merge it.

[chris-morgan]

Why “can not” rather than “cannot” for all of these? The two are distinctly different in meaning and the latter is the one intended (to say nothing of the variant names).

[SimonSapin]

They are? English is not my first language, please explain.

[mbrubeck]

For what it's worth, I am a native speaker and had never heard this before. The dictionaries and usage guides I checked claim they are interchangeable. From the Oxford English Dictionary:

cannot, v.

the ordinary modern way of writing can not

From Merriam-Webster:

Definition of CANNOT

can not

[Edit: That said, cannot is more common, and may be less ambiguous if other people read can not differently, as @chris-morgan does.]

[Edit 2: Oh, I see the ambiguity. "can not set" can be read either "(can not) set" as intended, or "can (not set)" which has a very different meaning indeed.]

[chris-morgan]

Yeah, the ambiguity is the matter; “can not set” is, devoid of context, more likely to mean “it is possible not to set” (given the context, the ambiguity can be resolved) while “cannot set” means “it is not possible to set”.

Ain’t English marvellous?

[chris-morgan]

Yeah, I think it’s reasonable to consider isindex obsolete!

[SimonSapin]

Maybe some day someone will complain about some random website that looks broken in Servo because of isindex, and maybe we’ll bring it back. Until then…

[Ms2ger]

I'll ask for it now.

[SimonSapin]

Eh. How about I bring it back as soon as Servo would use it?

[mbrubeck]

Some rustdoc comments would be welcome here.

[SimonSapin]

I’ll add comments, but this type is private and should not show up in rustdoc.

[mbrubeck]

r=mbrubeck, modulo the comments above