r?

Like `buf_as_slice` but for mutable pointers and slices.

r? @pcwalton

Struct and enum representations have some complicatedness that's no longer needed.  Now that everything's in one place and has access to anything we'd want to know about the type, flatten some of that out.  Slight changes to representations in some cases.

r? @nikomatsakis 

Incorporated @nikomatsakis's comments from #4748.

Fix #4635.

The only thing we really lose is that C-like enums with one variant and a
non-zero discriminant now take up space, but I do not think this is a
common usage.  As previously noted, that was mostly there for
transitional compatibility with the pre-adt.rs codebase.

Out goes the extra layer of struct wrapping; the destructedness flag is
added to the end of the struct.  This means that, if the struct
previously had alignment padding at the end, the flag will live there
instead of increasing the struct size.

There were three issues effecting the example in the getopts rustdoc:

1. The blockquote was incorrectly formatted.  Fixed by switching to using
   an explicit markdown code section with ```.
2. The `fail fail_str(f)` would not compile.  Fixed by using `fail!()` instead
   of `fail`.
3. The line `matches.free[0]` produced a compile error about moving from
   an immutable vector.  Fix by using `copy`.

Previous year range of 2011-2013 was based on file creation date.  The
check_license python script, however, only accepts copyrights starting
in 2012 or later.

There were three issues effecting the example in the getopts rustdoc:

1. The blockquote was incorrectly formatted.  Fixed by switching to using
   an explicit markdown code section with ```.
2. The `fail fail_str(f)` would not compile.  Fixed by using `fail!()` instead
   of `fail`.
3. The line `matches.free[0]` produced a compile error about moving from
   an immutable vector.  Fix by using `copy`.

Simplify the interface to check_fn by pulling some of the madness out to its callers.

rs=refactor

Without this change, rust-mode doesn't work if 'cl hasn't been required
by something else, apparently.  I'm not entirely sure what changed such
that I started seeing this problem instead of not, but maybe the emacs
world has been making progress towards not loading 'cl at runtime if
it's only needed at compile time.

(This change was previously submitted as e93a58d5 and accidentally reverted by ad8b437a.)

Modify pretty-printer to emit lifetimes and fix a few minor
parser bugs that this uncovered.

r? whomever.

Modify pretty-printer to emit lifetimes and fix a few minor
parser bugs that this uncovered.

Two small changes: `Not` was missing from the list of core traits and `assert` was removed from the language.

* add 'self region to the borrowed pointer parameter
* rm workaround for #2263
* inline (wrappers)
* iter-trait is gone

This makes `#[deriving_clone]` useful.

I wasn't sure if a macro was the right way to do this, but it seems more maintainable than a series of repetitive `impl`s.