Pony version 0.32.0 is now available. This release includes a few minor breaking changes that should be easy to adjust to. There are no pressing bugs closed by the release, so feel free to upgrade at your leisure.
Two important Notes:
Due to a change in COPR's Fedora build configuration, there will be no 0.32.0 prebuilt packages available on COPR for Fedora. We should have that resolved before the next release. If you'd like to help address the issue, you can learn more on GitHub.
It appears that Homebrew's Jenkins system is very backed up. There are still CI jobs from 5 days ago that haven't completed. We are moving ahead with announcing the Pony 0.32.0 release despite it not yet being available via Homebrew. Based on what we are seeing, we would say that 0.32.0 will be available via Homebrew "eventually". It could be days. It could be hours. We don't have enough visibility to know.
Allow fields to be consumed (sometimes)
Before this release, fields could not be
consumed. This release
changes things to allow fields to be consumed only if they are
reassigned in the same expression where they are
z = do_stuff(consume z) or
z.c = do_stuff(consume z.c))
and adhere to the following restrictions:
- only if that expression does not include any partial calls
- consumed fields cannot be referenced in any function calls
after the field is consumed
- only if that expression does not include any function calls
on traits or interfaces in any part of the call tree
- the parent object of a field cannot be consumed in that
- the field cannot be a
- a field of the same type cannot be referenced in any function
calls after the field is consumed
MaybePointer has been renamed to
NullablePointer. The previous name, MaybePointer, has confused many Pony users who are either new to the language or using the C Foreign Function Interface (C-FFI) for the first time. The purpose of
MaybePointer was for passing pointers to structs across the C-FFI boundary where those pointers may be null. We've renamed
NullablePointer in the hope that the new name leads to less confusion for users.
To update your code, change any reference to
NullablePointer. No other changes should be required.
Added sanity checks around
--pony* arguments controlling the runtime's threads
--ponythreads's value option can't be bigger than cores available
The process will now err out on start if the value provided is larger than the number of physical cores on the machine.
--ponyminthreadsoption can't be bigger than
The process will now err out on start if the value of minimum threads is bigger than the value provided to
--ponythreads. That includes the default one, i.e., the number of physical cores present, if you don't explicitly give the
--ponythreads to the process
Add --ponynoscale option
This new runtime argument is the equivalent of setting
--ponyminthreads to the same value as
--ponythreads to disable scheduler thread suspension by indicating that the minimum active scheduler threads required is the same as the total number of scheduler threads. You can't use
--ponyminthreads. If you don't specify
--ponythreads the scheduler will leverage all physical cores available.
--ponyhelp option to compiled program
Before this release, the only way to find out what pony runtime
specific command-line options a compiled pony program supported
was by running
ponyc --help and looking at the usage info for
This release adds a new
--ponyhelp option to all compiled pony
programs that will output the usage information for pony runtime
related command-line options.
[0.32.0] - 2019-09-29
- Allow fields to be
consumed (sometimes) (PR #3304)
--ponynoscaleoption (PR #3303)
--ponyhelpoption to compiled program (PR #3312)