I've implemented analysis support for the [GCC '=' write-only inline asm constraint modifier](http://gcc.gnu.org/onlinedocs/gcc/Modifiers.html). I had more changes, for '+' (read+write) as well, but it turns out LLVM doesn't support '+' at all.
I've removed the need for wrapping each output in ExprAddrOf, as that would require unwrapping almost everywhere and it was harder to reason about in borrowck than ExprAssign's LHS.
With this change, rustc will treat (in respect to validity of accessing a local) code like this:
```rust
let x: int;
unsafe {
asm!("mov $1, $0" : "=r"(x) : "r"(5u));
}
```
as if it were this:
```rust
let x : int;
x = 5;
```
Previously, the local was required to be both mutable and initialized, and the write effect wasn't recorded.
Refactors parsing of numerical literals to make it more readable.
Removes 'float'/the 'f' literal suffix and invalid character literals ''' and '\'.
Also makes attribute highlighting more robust and allows urls in attributes to be recognized.
Refactors parsing of numerical literals to make it more readable.
Removes 'float'/the 'f' literal suffix and invalid character literals ''' and '\'.
Also makes attribute highlighting more robust and allows urls in attributes to be recognized.
This was just incorrectly handled before, the path component shouldn't be looked
at at all (we used absolute paths everywhere instead of relative to the current
module location).
Closes#9861
This was just incorrectly handled before, the path component shouldn't be looked
at at all (we used absolute paths everywhere instead of relative to the current
module location).
Closes#9861
The code generation previously assumed a reference could not alter the
value in a way the destructor would notice. This is an incorrect
assumption for `&mut`, and is also incorrect for an `&` pointer to a
non-`Freeze` type.
Closes#7972
The code generation previously assumed a reference could not alter the
value in a way the destructor would notice. This is an incorrect
assumption for `&mut`, and is also incorrect for an `&` pointer to a
non-`Freeze` type.
Closes#7972
Hello,
First time rust contributor here, please let me know if I need to sort out the contribution agreement for this.
I picked issue #9755 to dip my toe in the water, this pull request isn't quite complete though as I have not updated the documentation. The reason for this is that I haven't tracked down why this feature is gated so I don't feel I can write a justification of the same quality as the other features have been documented.
If someone would like to explain or point me at a mail thread I am happy to update with this change.
Hopefully I have understood the process of converting the old flag into a directive correctly.
Also just to call out what I am sure if a known quirk when adding feature directives, you can't build this code unless you have a snapshot of the compiler which knows about the feature directive. Chicken and the egg. I split the change into two commits, the first should be able to build a snapshot that can compile the second.
std::iter: Introduce .by_ref() adaptor
Creates a wrapper around a mutable reference to the iterator.
This is useful to allow applying iterator adaptors while still
retaining ownership of the original iterator value.
Example::
let mut xs = range(0, 10);
// sum the first five values
let partial_sum = xs.by_ref().take(5).fold(0, |a, b| a + b);
assert!(partial_sum == 10);
// xs.next() is now `5`
assert!(xs.next() == Some(5));
---
This adaptor requires the user to have good understanding of
iterators or what a particular adaptor does. There could be some
pitfalls here with the iterator protocol, it's mostly the same issues
as other places regarding what happens after the iterator
returns None for the first time.
There could also be other ways to achieve the same thing, for
example Implementing iterator on `&mut T` itself:
`impl <T: Iterator<..>> Iterator for &mut T` but that would only
lead to confusion I think.
The goal here is to avoid requiring a division or multiplication to compare against the length. The bounds check previously used an incorrect micro-optimization to replace the division by a multiplication, but now neither is necessary *for slices*. Unique/managed vectors will have to do a division to get the length until they are reworked/replaced.
Rewrite the entire `std::path` module from scratch.
`PosixPath` is now based on `~[u8]`, which fixes#7225.
Unnecessary allocation has been eliminated.
There are a lot of clients of `Path` that still assume utf-8 paths.
This is covered in #9639.
Delete the following API functions:
- set_dirname()
- with_dirname()
- set_filestem()
- with_filestem()
- add_extension()
- file_path()
Also change pop() to return a boolean instead of an owned copy of the
old filename.
Standardize the is_sep() functions to be the same in both posix and
windows, and re-export from path. Update extra::glob to use this.
Remove the usage of either, as it's going away.
Move the WindowsPath-specific methods out of WindowsPath and make them
top-level functions of path::windows instead. This way you cannot
accidentally write code that will fail to compile on non-windows
architectures without typing ::windows anywhere.
Remove GenericPath::from_c_str() and just impl BytesContainer for
CString instead.
Remove .join_path() and .push_path() and just implement BytesContainer
for Path instead.
Remove FilenameDisplay and add a boolean flag to Display instead.
Remove .each_parent(). It only had one caller, so just inline its
definition there.
...al work
This is causing really awful scheduler behavior where the main thread scheduler is
continually waking up, stealing work, discovering it can't actually run the work,
and sending it off to another scheduler.
No test cases because we don't have suitable instrumentation for it.
* Allow named parameters to specify width/precision
* Intepret the format string '0$' as "width is the 0th argument" instead of
thinking the lone '0' was the sign-aware-zero-padding flag. To get both you'd
need to put '00$' which makes more sense if you want both to happen.
Closes#9669
