If this breaks your code, take a deep breath, go for a walk, and
consider why you're relying on the sign extension semantics of
enum-to-float casts.
[breaking-change]
Closes#8230.
This uncovered some dead code, most notably in middle/liveness.rs, which I think suggests there must be something fishy with that part of the code.
The #[allow(dead_code)] annotations on some of the fields I am not super happy about but as I understand, marker type may disappear at some point.
Previously, constants used unsigned extension, while non-constants used
signed extension. This unifies both paths to use signed extension.
If this breaks your code, take a deep breath, go for a walk, and
consider why you're relying on the sign extension semantics of
enum-to-float casts.
Closes#8230.
[breaking-change]
This commit moves Mutable, Map, MutableMap, Set, and MutableSet from
`core::collections` to the `collections` crate at the top-level. Additionally,
this removes the `deque` module and moves the `Deque` trait to only being
available at the top-level of the collections crate.
All functionality continues to be reexported through `std::collections`.
[breaking-change]
Part of #14248
Main contributors are @pcwalton, @alexcrichton and me. Only
@dguenther appear in git blame as a minor contribution, but it is
only adding the rust license, so removed by this relicensing.
After sitting down to build on the work merged in #14318, I realized that some of the test names were not clear, others probably weren't testing the right thing, and they were also not as exhaustive as they could have been.
Instead of calling a borrow() function that takes a pointer type, just
create a local pointer and dereference it. The dereference is there to
outsmart any future liveness analysis in borrowck.
The move_after_borrow / fu_move_after_borrow tests in
run-pass/borrowck-field-sensitivity.rs are not testing the right thing,
since the scope of the borrow is limited to the call to borrow(). When
fixed, these tests fail and thus should be moved to the corresponding
compile-fail test file.
A number of borrowck field-sensitivity tests perform more moves and
copies than their naming scheme would indicate. This is only necessary
for borrowed pointers (to ensure that the borrowws stay alive in the
near future when borrow liveness is tracked), but all other test
functions should be changed to match their name more closely.
Some of the borrowck field-sensitivity test functions have 'use' in
their name, but they don't refer to the specific kind of use (whether a
copy or a deref). It would be better if the name more precisely
reflected what the function is testing.
All rust functions are internal implementation details with respect to the ABI
exposed by crates, but extern fns are public components of the ABI and shouldn't
be stripped. This commit serializes reachable extern fns to metadata, so when
LTO is performed all of their symbols are not stripped.
Closes#14500
This commit carries out the request from issue #14678:
> The method `Iterator::len()` is surprising, as all the other uses of
> `len()` do not consume the value. `len()` would make more sense to be
> called `count()`, but that would collide with the current
> `Iterator::count(|T| -> bool) -> unit` method. That method, however, is
> a bit redundant, and can be easily replaced with
> `iter.filter(|x| x < 5).count()`.
> After this change, we could then define the `len()` method
> on `iter::ExactSize`.
Closes#14678.
[breaking-change]
Division and remainder by 0 are undefined behavior, and are detected at runtime.
This commit adds support for ensuring that MIN / -1 is also checked for at
runtime, as this would cause signed overflow, or undefined behvaior.
Closes#8460
I tried to split up the less mechanical changes into separate commits so they are easier to review. One thing I'm not quite sure of is whether `MoveReason` should just be replaced with `move_data::MoveKind`.
When converting check_loans to use ExprUseVisitor I encountered a few
issues where the wrong number of errors were being emitted for multiple
closure captures, but there is no existing test for this.
