Use displacement instead of initial bucket in HashMap code
Use displacement instead of initial bucket in HashMap code. It makes the code a bit cleaner and also saves a few instructions (handy since it'll be using some to do some sort of adaptive behavior soon).
Fix error explanation formatting
Errors E0101, E0458, E0535 and E0537 have incorrectly formatted bulleted lists in their explanations. As the result, they are not rendered as lists in the documentation.
The fix applies the correct formatting to those lists.
don't double-apply variant padding to const enums
`build_const_struct` already returns the struct with padding - don't double-apply it in the `General` case.
This should hopefully be the last time we have this sort of bug.
Fixes#38002.
Beta-nominating because regression.
r? @eddyb
Add rustbuild command `bench`
Add command bench to rustbuild, so that `./x.py bench <path>` can compile and run benchmarks.
`./x.py bench --stage 1 src/libcollections` and `./x.py bench --stage 1 src/libstd` should both compile well. Just `./x.py bench` runs all benchmarks for the libstd crates.
Fixes#37897
Follow our own recommendations in the examples
Remove exclamation marks from the the example error descriptions:
> The description [...] should not contain newlines or sentence-ending punctuation
Define `bound` argument in std::sync::mpsc::sync_channel in the documentation
The `bound` argument in `std::sync::mpsc::sync:channel(bound: usize)` was not defined in the documentation.
Fix two small issues in iterator docs
- `collect()` is a regular method, not an adaptor (does not return an Iterator). I just randomly picked `filter` as a third common adaptor to mention instead.
- Fix example in `Map`'s docs so that it uses the DoubleEndedIterator implementation
Use literal 5 instead of five in book section 4.1
The other two code snippets in this sentence are valid code, so it makes more sense to use the literal `5` rather than the invalid symbol `five`.
Delay error reporting of filename mismatch.
When cross compiling with procedural macros, the crate loader starts by
looking for a target crate, before trying with a host crate.
Rather than emitting an error immediately if the host and target
extension differ, the compiler should delay it until both attempts have
failed.
Fixes#37899
