Previously, `BufWriter::write` would just return an `std::io::OtherIoError` if someone attempted to write past the end of the wrapped buffer. This pull request changes the error to support partial writes and return a `std::io::ShortWrite`, or an `io::io::EndOfFile` if it's been fully exhausted.
I've also optimized away a bounds check inside `BufWriter::write`, which should help shave off some nanoseconds in an inner loops.
Adds the ability to use a custom allocator heap by passing either --cfg
external_crate and --extern external=<allocator_crate_name> or --cfg
external_funcs and defining the allocator functions prefixed by 'rust_'
somewhere.
This is useful for many applications including OS/embedded development,
and allocator development and testing.
Part of #18424
Adds `capacity()` function to VecMap, as per the collections reform.
(Salvaged from #19516, #19523, while we await an RFC regarding `reserve`/`reserve_index` for `VecMap`)
Right now, `DerefMut` is not `for Sized?`, so you can't impl `DerefMut<T> for Foo` where `Foo` is unsized. However, there is no reason that it can't be `for Sized?`, so this pull request fixes the issue.
Closes#19493.
We heavily rely on queries and fragments in the URL structure, so it is desired to preserve them even in the redirects. The generated redirect pages try to preserve them with scripts, which take precedence over the original `Refresh` metadata. Non-scripting browsers would continue to work (with no queries and fragments).
(This in turn solves a number of semi-broken links to the source code, which are actually linked to redirect pages.)
Added the example from [this Reddit thread][1], reworked to be more robust with correct logic (first link skipped the 0th and 1st Fibonacci numbers, second forgot about the last two valid values before overflow). Will yield all Fibonacci numbers sequentially in the range `[0, <u32 as Int>::max_value())`.
If the example is too complicated I can change it to a more naive version, perhaps using signed integers to check for overflow instead of `Option` and `.checked_add()`.
Also reworded the doc comments to clarify the usage and behavior of `Unfold`, as the thread suggested that it wasn't really clear how `Unfold` worked and when one should use it.
This change is in the `core` crate but I based the example on `std` since that's where most readers will find the example. I included a note about `core` for clarity. Edit: removed.
Tested with `rustdoc src/libcore/lib.rs`. Rebased against latest master as of the creation of this PR.
[1]: http://www.reddit.com/r/rust/comments/2ny8r1/a_question_about_loops/cmighu4?context=10000
