rustc compiler config for Vim

[chris-morgan]

Note that this is not actually used by default; it is a matter of
configuration still, because you might want to:

• Compile all .rs files with rustc % (where each can be built itself)
• Compile all .rs files with rustc some-file.rs (where you are editing
  part of a crate)
• Compile with a different tool, such as make. (In this case you might
  put a ~/.vim/after/compiler/rustc.vim to match such cases, set
  makeprg and extend errorformat as appropriate. That should probably go
  in a different compiler mode, e.g. make-rustc.)

To try using it, :compiler rustc. Then, :make on a file you would
run rustc on will work its magic, invoking rustc. To automate this,
you could have something like autocmd FileType rust compiler rustc in
your Vim config.

[lilyball]

Suggestion: Add a :compiler rustrun that uses rust run instead.

[chris-morgan]

@kballard Hmm, not sure about that. That's not the idea of a compiler plug-in. Then also: if it runs for a long time, it blocks Vim, and if it writes to stdout/stderr, you'll get lines that are unlikely to match 'errorformat', but some may, and things will get tangled, though probably not severely.

[lilyball]

@chris-morgan Fair enough. Would be nice to add a :Rustrun command though that does this.

[chris-morgan]

@kballard I could do that, but it's be equivalent to :!rust run <args> (or with no arguments, :!rust run %), wouldn't it? Hardly seems worth it at present.

[lilyball]

@chris-morgan: :!rust run % requires you to be operating on a saved file. My ideal :Rustrun would let me do this even with buffers that don't have an associated file on-disk.