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MatthieuDartiailh
Python 3.11 support
Now that Python 3.11 is in beta (and should have no new features), are there plans to support Python 3.11?
Yes but I plan to work on it at one point by my current bandwidth for OSS is really low. So if you have the inclination to start something feel free to do so.
I am going to start working on this slowly and post here about my progress.
The first topic I looked into is the new exception table feature. Basically it means try except are now really represented at the bytecode level as instructions but only in the table. At the ConcreteBytecode level, I think that simply having a human readable version of the format describe in https://github.com/python/cpython/blob/main/Objects/exception_handling_notes.txt is properly the right abstraction.
At the Bytecode and CFG level the story is a bit different. First we will use labels to indicate jump target as for any other jump. However I believe it would make sense to also have pseudo-instruction delineating the block in which an exception can be caught. At the Bytecode level having an entry and exit marker is relatively easy for the CFG it may be a bit more involved and I do not have a clear idea yet of what things are going to look like. Any opinion is welcome as to how to approach this new design.
Is it possible to create an exception table object from Python?
First we will use labels to indicate jump target as for any other jump
Makes sense. Perhaps their contructors can take the target label as an identifier for the exception "block".
The exception table is just a bunch of bytes as described in the linked file. So yes we will be able to create it from Python.
Regarding you second point, yes the pseudo instruction will take the exception handling block label as a target.
The exception table is just a bunch of bytes as described in the linked file. So yes we will be able to create it from Python.
Ah ok, that's just a bytes object now: https://github.com/python/cpython/blob/c485ec014ce174bb3f5ae948151dc40e0f6d5f7f/Objects/codeobject.c#L249