We were only using their ffi implementations which are automatically
exported/public, but the actual functions we would need if we were to use
FdMonitor and co. in native rust code were either private or missing convenient
wrappers.
The existing code is kept, but a rusty version of these functions is added for
code that needs them.
These should only be temporarily used when porting 1-to-1 from C++; we should
use the std library's `read()` and `write_all()` methods instead in the future.
By extracting the equivalent of i32::cmp() into its own const function,
it becomes a lot easier to see what is happening and the logic can be
more direct.
These will be used in the parser.
Maybe this type should be a struct with boolean fields. The current way has
the upside that the usage is exactly the same as in C++.
CXX does not allow generic types like maybe_t. When porting a C++ function
that returns maybe_t to Rust, we return std::unique_ptr instead. Let's make
the transition more seamless by allowing to convert back to maybe_t implicitly.
For some reason this error is triggered by tests after the Rust port of
ast.cpp. Might want to get to the bottom of this but moving it back
to match the original C++ logic fixes it.
This is one of the few warnings we disable due to false positives. Let's also
disable it in the preprocessing steps needed for the Rust build.
Other warnings we ignore are -Wno-address -Wunused-local-typedefs and
-Wunused-macros. I didn't add them here because I don't expect that they
will be triggered by the headers we give to cxx.
After deleting a history item with
history delete --exact --case-sensitive the-item
it is still reachable by history search until the shell is restarted.
Let's fix this by saving history after each deletion. The non-exact variants
of "history delete" already do this. I think this was just an oversight
owed to the fact that hardly anyone uses "--exact" (else we would surely
have changed it to not require an explicit "--case-sensitive").
Prior to this fix, the Rust FLOG output was regressed from C++, because
it put quotes around strings. However if we used Display, we would fail
to FLOG non-display types like ThreadIDs.
There is apparently no way in Rust to write a function which formats a
value preferentially using Display, falling back to Debug.
Fix this by introducing two new traits, FloggableDisplay and
FloggableDebug. FloggableDisplay is implemented for all Display types,
and FloggableDebug can be "opted into" for any Debug type:
impl FloggableDebug for MyType {}
Both traits have a 'to_flog_str' function. FLOG brings them both into
scope, and Rust figures out which 'to_flog_str' gets called.
`xbps-query` actually parses `-Rsl` as `-Rs l`, which means that packages
without the letter "l" in their names or descriptions are not included in
`__fish_print_xbps_packages`'s output.
* wutil: Rewrite `wrealpath` in Rust
* Reduce use of FFI types in `wrealpath`
* Addressed PR comments regarding allocation
* Replace let binding assignment with regular comparison
More ugliness with types that cxx bridge can't recognize as being POD. Using
pointers to get/set `termios` values with an assert to make sure we're using
identical definitions on both sides (in cpp from the system headers and in rust
from the libc crate as exported).
I don't know why cxx bridge doesn't allow `SharedPtr<OpaqueRustType>` but we can
work around it in C++ by converting a `Box<T>` to a `shared_ptr<T>` then convert
it back when it needs to be destructed. I can't find a clean way of doing it
from the cxx bridge wrapper so for now it needs to be done manually in the C++
code.
Types/values that are drop-in ready over ffi are renamed to match the old cpp
names but for types that now differ due to ffi difficulties I've left the `_ffi`
in the function names to indicate that this isn't the "correct" way of using the
types/methods.
We want to keep the cast because tv_sec is not always 64 bits, see b5ff175b4
(Fix timer.rs cross-platform compilation, 2023-02-14).
It would be nice to avoid the clippy exemption, perhaps using something like
#[cfg(target_pointer_width = "32")]
let seconds = val.tv_sec as i64;
#[cfg(not(target_pointer_width = "32"))]
let seconds = val.tv_sec;
but I'm not sure if "target_pointer_width" is the right criteria.
