Before this commit `-C codegen-units` would just get silently be
ignored if `-C incremental` was specified too. After this commit
one can control the number of codegen units generated during
incremental compilation. The default is rather high at 256, so most
crates won't see a difference unless explicitly opting into a lower
count.
more clippy fixes
* use is_empty() instead of len comparison (clippy::len_zero)
* use if let instead of while let loop that never loops (clippy::never_loop)
* remove redundant returns (clippy::needless_return)
* remove redundant closures (clippy::redundant_closure)
* use if let instead of match and wildcard pattern (clippy::single_match)
* don't repeat field names redundantly (clippy::redundant_field_names)
r? @Centril
Fix incorrect documentation for `str::{split_at, split_at_mut}`
The documentation for each method currently states:
> Panics if `mid` is not on a UTF-8 code point boundary, or if it is beyond the last code point of the string slice.
However, this is not consistent with the real behavior, or that of the corresponding methods for `[T]` slices. A comment inside each of the `str` methods states:
> is_char_boundary checks that the index is in [0, .len()]
That is what I would expect the behavior to be, and in fact this seems to be the real behavior. For example ([playground](https://play.rust-lang.org/?version=stable&mode=debug&edition=2018&gist=8e03dcc209d4dd176df2297523f9fee1)):
```rust
fn main() {
// Prints ("abc", "") and doesn't panic
println!("{:?}", "abc".split_at(3));
}
```
In this case, I would interpret "the last code point of the string slice" to mean the byte at index 2 in UTF-8. However, it is possible to pass an index of 3, which is definitely "beyond the last code point of the string slice".
I think that this is much clearer, but feel free to bikeshed.
Add `Rust` to the code snippet
Adds `Rust` to the snippet where the code causing the ICE should be placed, so github can render it as Rust code rather than plain code.
std: Fix over-aligned allocations on wasm32-wasi
The wasm32-wasi target delegates its malloc implementation to the
functions in wasi-libc, but the invocation of `aligned_alloc` was
incorrect by passing the number of bytes requested first rather than the
alignment. This commit swaps the order of these two arguments to ensure
that we allocate over-aligned memory correctly.
infer array len from pattern
closes#70529
This still errors in the following case
```rust
#![feature(const_generics)]
fn arr<const N: usize>() -> [u8; N] {
todo!()
}
fn main() {
match arr() {
[5, ..] => (),
//~^ ERROR cannot pattern-match on an array without a fixed length
[_, _] => (),
}
}
```
Considering that this should be rare and is harder to implement I would merge this PR without *fixing* the above.
Add long error code for error E0226
Added a long description message for error E0226, which previously did not exist.
As requested in issue #61137
r? @GuillaumeGomez
Optimize strip_prefix and strip_suffix with str patterns
As mentioned in https://github.com/rust-lang/rust/issues/67302#issuecomment-585639226.
I'm not sure whether adding these methods to `Pattern` is desirable—but they have default implementations so the change is backwards compatible. Plus it seems like they're slated for wholesale replacement soon anyway? #56345
----
Constructing a Searcher in strip_prefix and strip_suffix is
unnecessarily slow when the pattern is a fixed-length string. Add
strip_prefix and strip_suffix methods to the Pattern trait, and add
optimized implementations of these methods in the str implementation.
The old implementation is retained as the default for these methods.
use is_empty() instead of len comparison (clippy::len_zero)
use if let instead of while let loop that never loops (clippy::never_loop)
remove redundant returns (clippy::needless_return)
remove redundant closures (clippy::redundant_closure)
use if let instead of match and wildcard pattern (clippy::single_match)
don't repeat field names redundantly (clippy::redundant_field_names)
This is a follow-up to #70123, which added `llvm-config --libdir` to the
`LIBRARY_PATH` for rustc tools. We need the same for "run-make-fulldeps"
and "ui-fulldeps" tests which depend on compiler libraries, implicitly
needing to link to `-lLLVM` as well.
The wasm32-wasi target delegates its malloc implementation to the
functions in wasi-libc, but the invocation of `aligned_alloc` was
incorrect by passing the number of bytes requested first rather than the
alignment. This commit swaps the order of these two arguments to ensure
that we allocate over-aligned memory correctly.
