We almost never access any of this and having it stored directly in the `Block`
struct increases its size (reducing how many we can fit in L1 and L2, and
increasing memory copy traffic).
Gets rid of BlockData::None so we can avoid allocating a Box at all when we have
no data (at the cost of yet-another-wrapper-type), which is the usual case.
This has a few advantages,
* We now statically assert that all fields used by a particular block type are
correctly initialized (i.e. you can't assign the function name but forget to
assign its arguments),
* Conversely, we can match directly on `BlockData` and be guaranteed that the
fields we want to access are initialized and present,
* We reduce the number of assertions, effectively "unwrapping" only once based
off the block type instead of each time we try to access a conditional field,
* We reduce the size of the `Block` struct by coalescing fields that cannot
co-exist, bringing it down from 104 bytes to 88 bytes.
It would be nice to make all of `Block` itself an enum, but it currently
requires `Copy` and we take advantage of that to copy it around everywhere.
Putting these fields directly in `Block` directly would mean a lot more memory
traffic just checking block types.
There's no need for two separate block types when one is merely a variant of the
other. This may have been required under C++ but thanks to sum types (rust's
enums) we don't need to do that any more.
The value completions were rendered almost entirely useless due to the forced
inclusion of file completions at all tokens, including in the head/command
position thanks to the use of `__fish_complete_subcommand` which doesn't
understand the semantics of `env` and expects something like `ssh`. But we don't
need it at all.
If the backgrounded/stopped job was using the tty, sending it SIGCONT first
might cause it to immediately wake and try to use the tty (which fish still has
control over), causing it to immediately stop again after receiving a SIGTTOU.
We are supposed to send SIGHUP first so that when the process resumes it sees
the queued SIGHUP and executes its registered handler!
Don't fork/exec an external process, especially one performing IO, if we don't
have to.
This, in turn, speeds up __fish_source_cached_completions which is rather slow
under WSL (and slower than it needs to be on other platforms).
Use "directories" explicitly instead of "components" to make it more
clear that the arguments need to be directories, not files.
Also a bit on intent and variable scope.
There's no guarantee that a condition variable is stateful. The docs for
`Condvar::notify_one()` actually say the opposite:
> If there is a blocked thread on this condition variable, then it will be woken
> up from its call to wait or wait_timeout. Calls to notify_one are not buffered
> in any way.
This test was relying on the main loop obtaining the lock and entering the
condition variable sleep before the thread was scheduled and got around to
notifying the condition variable. If this non-deterministic behavior was not
upheld, the test would time out since it would obtain the lock (either before or
after the variable were updated) then call `condvar.wait()` *after* the variable
had been updated and the condvar signalled, but without (atomically or even at
all) checking to see if the desired wake precondition was fulfilled. As the
child thread had already run and the wake notification was NOT buffered, there
was nothing to wake the running thread.
There really wasn't any way to salvage the test as originally written, since the
write to `ctx.val` was not in any way linked to the acquire/release of the mutex
so regardless of whether or not the main thread obtained the mutex and checked
the value precondition before calling `condvar.wait()`, the child thread's write
could have happened after the check but before the wait() call. As such, the
test has been rewritten to use `wait_while()` but then also updated to bail in
case of a timeout instead of hanging indefinitely (since neither the `ctest`
runner nor the `cargo test` harness was timing out; `cargo test` would only
report that the test had exceeded 60 seconds but as long as it was not executed
with `cargo test -- -Z --ensure-time` (which is only available under nightly),
the test would not halt.
If this test were *intentionally* written to test the scenario that was timing
out, it should be written deterministically in such a way that the main loop
did not run until after it was guaranteed that the variable had been updated
(i.e. by looping until val became 5 or waiting for an AtomicBool indicating the
update had completed to be set), but I'm not sure what the benefit in that would
be since the docs actually guarantee the opposite behavior (the notified state
is explicitly not cached/buffered).
If we have fish code written with the assumption that condvar notifications
prior to *any* call to `Condvar::wait()` *are* buffered, then that code should
of course be revisited in light of this.
Commit 8a7c3ce (Don't abandon line after writing control sequences, 2024-04-06)
was broken by 29f2da8 (Toggle terminal protocols lazily, 2024-05-16), fix that.
Fixes#10529
Reminder that reStructuredText is awkward and you can't make sphinx treat these
as inline code; they'll be formatted as italic text only.
Vim search expression:
\([`:]\)\@<!`[^`:]\+`\(`\)\@!
Followed by
ysi``
does the trick quite nicely.
* feat: improve konsole completion
* Improve konsole profile completion to be dynamic
Directly complete --profile as a long argument
* Dynamically complete konsole -p
This makes `path basename` a more useful replacement for the stock `basename`
command, which can be used with `-s .ext` to trim `.ext` from the base name.
Previously, this would have required the equivalent of
path change-extension "" (path basename $path)
but now it can be just
path basename -E $path
* Properly handle a lot more -Z completion formats as suggested by `rustc -Z
help`
* Don't run any `rustc` commands when sourcing `rustc.fish`; these invocations
are instead deferred until the user attempts to complete the specific switch.
* Support CSV -A/F/D/W values
This adds a crate containing a new implementation of printf, ported from musl.
This has some advantages:
- locale support is direct instead of being "applied after".
- No dependencies on libc printf. No unsafe code at all.
- No more WideWrite - just uses std::fmt::Write.
- Rounding is handled directly in all cases, instead of relying on Rust and/or
libc.
- No essential dependency on WString.
- Supports %n.
- Implementation is more likely to be correct since it's based on a widely used
printf, instead of a low-traffic Rust crate.
- Significantly faster.
Mostly replacing std::<type>::MAX with <type>::MAX.
Surprising here is replacing
.expect(format!(...))
with
.unwrap_or_else(|_| panic!(...))
It explains that this is because the "format!" would always be called.
This enabled the profile in fish_setlocale, which caused startup
profile to always be on, so
```fish
fish --profile file -c 'foo'
```
would show the entire startup as well
Hex float parsing may come about through wcstod, for example:
printf "%f" '0x8p2'
should output 32.0.
Currently we use a not-great fork of hexponent. Hexponent has been dormant for
years, and has some issues: doesn't round properly, allocates unnecessarily,
doesn't handle denormals, is more complicated than necessary.
Just rewrite hex float parsing, fixing those problems and getting us off of this
weird fork.
