Make all methods of `std::net::Ipv6Addr` const
Make the following methods of `std::net::Ipv6Addr` unstable const under the `const_ipv6` feature:
- `segments`
- `is_unspecified`
- `is_loopback`
- `is_global` (unstable)
- `is_unique_local`
- `is_unicast_link_local_strict`
- `is_documentation`
- `multicast_scope`
- `is_multicast`
- `to_ipv4_mapped`
- `to_ipv4`
This would make all methods of `Ipv6Addr` const.
Changed the implementation of `is_unspecified` and `is_loopback` to use a `match` instead of `==`, all other methods did not require a change.
All these methods are dependent on `segments`, the current implementation of which requires unstable `const_fn_transmute` ([PR#75085](https://github.com/rust-lang/rust/pull/75085)).
Part of #76205
Move to intra-doc links for library/core/src/panic.rs
Helps with #75080.
@rustbot modify labels: T-doc, A-intra-doc-links, T-rustdoc
Known issues:
* Link from `core` to `std` (#74481):
[`set_hook`]
[`String`]
Give a better error message for duplicate built-in macros
Minor follow-up to https://github.com/rust-lang/rust/pull/75176 giving a better error message for duplicate builtin macros. This would have made it a little easier to debug.
r? @petrochenkov
Use "Fira Sans" for crate list font
Fira Sans is what's used for module lists and other item lists.
Previously, the default body font, "Source Serif Pro", was used for
crate lists, which didn't visually match other item lists.
@rustbot modify labels: T-rustdoc
Add more examples to lexicographic cmp on Iterators.
Given two arrays of T1 and T2, the most important rule of lexicographical comparison is that two arrays
of equal length will be compared until the first difference occured.
The examples provided only focuses on the second rule that says that the
shorter array will be filled with some T2 that is less than every T1.
Which is only possible because of the first rule.
Add new `-Z dump-mir-spanview` option
Similar to `-Z dump-mir-graphviz`, this adds the option to write
HTML+CSS files that allow users to analyze the spans associated with MIR
elements (by individual statement, just terminator, or overall basic
block).
This PR was split out from PR #76004, and exposes an API for spanview
HTML+CSS files that is also used to analyze code regions chosen for
coverage instrumentation (in a follow-on PR).
Rust compiler MCP rust-lang/compiler-team#278
Relevant issue: #34701 - Implement support for LLVMs code coverage
instrumentation
r? @tmandry
FYI @wesleywiser
Fira Sans is what's used for module lists and other item lists.
Previously, the default body font, "Source Serif Pro", was used for
crate lists, which didn't visually match other item lists.
Run cfg-stripping on generic parameters before invoking derive macros
Fixes#75930
This changes the tokens seen by a proc-macro. However, ising a `#[cfg]` attribute
on a generic paramter is unusual, and combining it with a proc-macro
derive is probably even more unusual. I don't expect this to cause any
breakage.
Make the following methods of `std::net::Ipv6Addr` unstable const under the `const_ipv6` feature:
- `segments`
- `is_unspecified`
- `is_loopback`
- `is_global` (unstable)
- `is_unique_local`
- `is_unicast_link_local_strict`
- `is_documentation`
- `multicast_scope`
- `is_multicast`
- `to_ipv4_mapped`
- `to_ipv4`
Changed the implementation of `is_unspecified` and `is_loopback` to use a `match` instead of `==`.
Part of #76205
Move ninja requirements to a dynamic check, when actually building
It isn't practical to determine whether we'll build LLVM very early in the
pipeline, so move the ninja checking to a dynamic check.
r? @pietroalbini -- this should fix nightlies
Eliminate some other bound checks when index comes from an enum
#36962 introduced an assumption for the upper limit of the enum's value. This PR adds an assumption to the lower value as well.
I've modified the original codegen test to show that derived (in that case, adding 1) values also don't generate bounds checks.
However, this test is actually carefully crafted to not hit a bug: if the enum's variants are modified to 1 and 2 instead of 2 and 3, the test fails by adding a bounds check. I suppose this is an LLVM issue and #75525, while not exactly in this context should be tracking it.
I'm not at all confident if this patch can be accepted, or even if it _should_ be accepted in this state. But I'm curious about what others think :)
~Improves~ Should improve #13926 but does not close it because it's not exactly predictable, where bounds checks may pop up against the assumptions.
Previously, this would say no such macro existed, but this was
misleading, since the macro _did_ exist, it was just already seen.
- Say where the macro was previously defined
- Add long-form error message
Make to_immediate/from_immediate configurable by backends
`librustc_codegen_ssa` has the concept of an immediate vs. memory type, and `librustc_codegen_llvm` uses this distinction to implement `bool`s being `i8` in memory, and `i1` in immediate contexts. However, some of that implementation leaked into `codegen_ssa` when converting to/from immediate values. So, move those methods into builder traits, so that behavior can be configured by backends.
This is useful if a backend is able to keep bools as bools, or, needs to do more trickery than just bools to bytes.
(Note that there's already a large amount of things abstracted with "immediate types" - this is just bringing this particular thing in line to be abstracted as well)
---
Pinging @eddyb since that's who I was talking about this change with when they suggested I submit a PR.
Similar to `-Z dump-mir-graphviz`, this adds the option to write
HTML+CSS files that allow users to analyze the spans associated with MIR
elements (by individual statement, just terminator, or overall basic
block).
This PR was split out from PR #76004, and exposes an API for spanview
HTML+CSS files that is also used to analyze code regions chosen for
coverage instrumentation (in a follow-on PR).
Rust compiler MCP rust-lang/compiler-team#278
Relevant issue: #34701 - Implement support for LLVMs code coverage
instrumentation
rename get_{ref, mut} to assume_init_{ref,mut} in Maybeuninit
References #63568
Rework with comments addressed from #66174
Have replaced most of the occurrences I've found, hopefully didn't miss out anything
r? @RalfJung
(thanks @danielhenrymantilla for the initial work on this)
This reverts commit 7e2548fe69.
Now I know why it was redefined: it seems like it's potentially because
of the orphan rule. Here are the error messages:
error[E0119]: conflicting implementations of trait `std::fmt::Debug` for type `!`:
--> src/primitive_docs.rs:236:1
|
6 | impl Debug for ! {
| ^^^^^^^^^^^^^^^^
|
= note: conflicting implementation in crate `core`:
- impl std::fmt::Debug for !;
error[E0117]: only traits defined in the current crate can be implemented for arbitrary types
--> src/primitive_docs.rs:236:1
|
6 | impl Debug for ! {
| ^^^^^^^^^^^^^^^-
| | |
| | `!` is not defined in the current crate
| impl doesn't use only types from inside the current crate
|
= note: define and implement a trait or new type instead
Update expect-test to 1.0
The only change is that `expect_file` now uses path relative to the
current file (same as `include!`). Before, it used paths relative to
the workspace root, which makes no sense.
Make `cow_is_borrowed` methods const
Constify the following methods of `alloc::borrow::Cow`:
- `is_borrowed`
- `is_owned`
Analogous to the const methods `is_some` and `is_none` for Option, and `is_ok` and `is_err` for Result.
These methods are still unstable under `cow_is_borrowed`.
Possible because of #49146 (Allow if and match in constants).
Tracking issue: #65143
Adds two source span utility functions used in source-based coverage
`span.is_empty()` - returns true if `lo()` and `hi()` are equal. This is
not only a convenience, but makes it clear that a `Span` can be empty
(that is, retrieving the source for an empty `Span` will return an empty
string), and codifies the (otherwise undocumented--in the rustc_span
package, at least) fact that `Span` is a half-open interval (where
`hi()` is the open end).
`source_map.lookup_file_span()` - returns an enclosing `Span`
representing the start and end positions of the file enclosing the given
`BytePos`. This gives developers a clear way to quickly determine if any
any other `BytePos` or `Span` is also from the same file (for example,
by simply calling `file_span.contains(span)`).
This results in much simpler code and is much more runtime efficient
compared with the obvious alternative: calling `source_map.lookup_line()`
for any two `Span`'s byte positions, handle both arms of the `Result`
(both contain the file), and then compare files. It is also more
efficient than the non-public method `lookup_source_file_idx()` for each
`BytePos`, because, while comparing the internal source file indexes
would be efficient, looking up the source file index for every `BytePos`
or `Span` to be compared requires a binary search (worst case
performance being O(log n) for every lookup).
`source_map.lookup_file_span()` performs the binary search only once, to
get the `file_span` result that can be used to compare to any number of
other `BytePos` or `Span` values and those comparisons are always O(1).
This PR was split out from PR #75828 .
r? @tmandry
FYI: @wesleywiser
