So far `librustc::trans::base::trans_fn()` and `trans_closure()` have been passed the list of attributes on the function being translated *only* if the function was local and non-generic. For generic functions, functions inlined from other crates, functions with foreign ABI and for closures, only an empty list of attributes was ever passed to `trans_fn()`.
This led to the case that generic functions marked with `#[rustc_mir]` where not actually translated via MIR but via the legacy translation path.
This PR makes function/closure attributes always be passed to `trans_fn()` and disables the one test where this makes a difference.
If there is an actual reason why attributes were not passed along in these cases, let me know.
cc @rust-lang/compiler
cc @luqmana regarding the test case
Add OpAssign to Wrapping<T>, plus fix some problems in core::num::wrapping
including, but not limited to:
* Testing Wrapping<T>
* Pull out a lot of broken code that doesn't need to be there with the new stage0 compiler
* Adding Rem and RemAssign to Wrapping<T>
* Removed 3 (assumed accidental) re-exports, which is a minor [breaking-change].
* Change shl and shr to take all integer types, instead of a usize; this is a more major [breaking-change], because of values that were inferred before, but brings us in line with the integer shifts.
Fixes#30524 and #30523
This makes both of the following return Err:
".".parse::<f32>()
".".parse::<f64>()
This is a [breaking-change], which the libs team have classified as a
bug fix.
`fs::File` was being referenced without either calling via `std::fs::File` or by using `File` after having used `std::fs::File`. Also `Path` was being referenced without first having used `std::path::Path`.
fs::File was being referenced without either calling via std::fs::File or by using File after having used fs::File. Also Path was being referenced without first having used std::path::Path.
This is not a fix to checks themselves per se (though we still use `Eq` MIR test instead of calling `PartialEq::eq`), but rather how we handle items we encounter in pattern position.
Previously we would just call `PartialEq` with the constant and the matchee, but now we essentially inline the constant instead. E.g. these two snippets are functionally equivalent at MIR level:
```
match val { Some(42) => true, _ => false }
```
and
```
const SECRET: Option<u8> = Some(42);
match val { SECRET => true, _ => false }
```
This approach also allows for more optimizations of matches. I.e. It can now exploit `SwitchInt` to switch on number inside a `Some` regardless of whether the value being an item or not.
This is based on @tsion’s already approved PR so I could reuse the file for more tests.
r? @eddyb
cc @nikomatsakis @tsion
Obviously we can't remove the character one past the end of the String. And we can't today either - we'll just panic at char_at() instead - but if we're going to keep that assertion, we should at least have a correct assertion.
Obviously we can't remove the character one past the end of the String. And we can't today either - we'll just panic at char_at() instead - but if we're going to keep that assertion, we should at least have a correct assertion.
f64 methods have been stable since rust 1.0, but f32 never got stabilised.
I suggest backporting this to beta as well (needs changing stablilisation version then).
r? @aturon
Fixes https://github.com/rust-lang/rfcs/issues/1438
When looking in the documentation I often scan the examples the first thing I do. In these 3 cases it's not obvious which direction the operation happens by adding this comment it makes it more obvious.
r? @steveklabnik
