TRPL: embedding rust

[steveklabnik]

This is the first chunk of the last guide I'll land before 1.0. I wanted to kick off reviews earlier rahter than later, so here's the important parts, with the Python and Node implementations coming later today.

[rust-highfive]

r? @nikomatsakis

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[steveklabnik]

This is based off of work by both @alexcrichton and @callahad. ❤️

r? @alexcrichton

[Nercury]

Unless optimiser optimises this away?

[callahad]

Yeah, I had to be careful to use a debug build of my "spin uselessly" library, lest nothing happened at all. :)

[steveklabnik]

I added a let _ = x line, and performance didn't seem to change. is the optimizer smart enough in these cases?

[steveklabnik]

Added python and node. So easy!

[killercup]

s/“/"
s/”/"

[steveklabnik]

oh dammit vim

[steveklabnik]

more nits addressed. r? @alexcrichton

[alexcrichton]

s/libembed.dll/embed.dll/

[steveklabnik]

ah nice

[alexcrichton]

Just a few minor nits here and there, but otherwise r=me, thanks @steveklabnik!

[steveklabnik]

@bors: r=alexcrichton rollup

[bors]

📌 Commit fc6372e has been approved by alexcrichton