The error message was misleading, so I adjusted it, and I also added the long diagnostics for this error (resolves one point in #24407).
I was unsure about how to phrase the error message. Is “generic parameter binding” the correct term for this?
So, I realize this is really late in the game so it's unlikely to be accepted but `FromRawFd`/`FromRawHandle` are necessary for fine grain control over file creation. For example, the current `OpenOptions` does not provide a way to avoid file creation races (there's no way to specify `O_EXCL` or the windows equivalent). Stabilizing these traits and their implementations will give 1.0 users fine-grain control over file creation without committing to any new complex APIs. Additionally, `AsRawFd`/`AsRawHandle` are already stable so I feel that that stabilizing their inverses is a reasonably small change.
Disclaimer: I'm asking because my crate, tempfile, depends on this feature.
These constants were added in 6f54ce9aa5 and
e8fbd1ce04 to a consts module that is behind a
gate.
I have not confirmed that these constants do indeed work on either OSX or iOS.
The [UnsafeCell documentation says it is undefined behavior](http://doc.rust-lang.org/nightly/std/cell/struct.UnsafeCell.html), so people shouldn't do it.
This happened to catch one case in libstd that was doing this, and I switched that to use an UnsafeCell internally.
Closes#13146
Added documentation of the panicking overflow to the `count` and `position`
methods of `IteratorExt`, also make them more obvious in the code.
Also mention that the `Iterator::next` method of the struct returned by
`IteratorExt::enumerate` can panic due to overflow.
Previously, `try_write` actually only obtained shared read access (but would return a `RwLockWriteGuard` if that access was successful).
Also updates the docs for `try_read` and `try_write`, which were leftover from when those methods returned `Option` instead of `Result`.
These constants were added in 6f54ce9aa5 and
e8fbd1ce04 to a consts module that is behind a
gate.
I have not confirmed that these constants do indeed work on either OSX or iOS.
It appears that some of the constants may actually belong in a POSIX module,
but I didn't make these changes here because I don't have access to the POSIX
standard.
Many bounds are currently of the form `T: ?Sized + AsRef<OsStr>` where the
argument is `&T`, but the pattern elsewhere (primarily `std::fs`) has been to
remove the `?Sized` bound and take `T` instead (allowing usage with both
references and owned values). This commit generalizes the possible apis in
`std::env` from `&T` to `T` in this fashion.
The `split_paths` function remains the same as the return value borrows the
input value, so ta borrowed reference is required.
Explicitely spell out behaviour on overflow for `usize`-returning iterator
functions.
Mention that panics are guaranteed if debug assertions are active, otherwise a
wrong result might be returned.
collections: Convert SliceConcatExt to use associated types
Coherence now allows this, we have `SliceConcatExt<T> for [V] where T: Sized + Clone` and` SliceConcatExt<str> for [S]`, these don't conflict because
str is never Sized.
