Implement Py38 named expression (PEP 572) #1934
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…ension, in other cases use regular evaluation order
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Be carefull, when testing it in an existing workspace as the bytecode changed. Although, I set the new instruction to the end, such that it should have no interference with already compiled bytecode files, I cannot ensure it. |
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thanks for tackling this. codes look quite good |
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…arinings and cleanup required
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…invalids are passed. Cleaned up in symboltable
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Mostly done. Just need to add a few more checks, cleanup and merge. Some scoping issues will remain as they are an already existing RustPython problem. So we can fix that with a separate PR. |
Incrementally adding OpenBSD support (pt. 1)
…with-_io Initialize the vm with imports from _io instead of io
…ension, in other cases use regular evaluation order
…arinings and cleanup required
…invalids are passed. Cleaned up in symboltable
…ey/RustPython into TheAnyKey/p38_named_expr
coolreader18
approved these changes
May 29, 2020
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@windelbouwman could you take a look at the symbol table changes? |
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Ahh, nice, the infamous walrus operator! := |
…n from symbol resolution. Added some more comments.
…n from symbol resolution. Added some more comments.
…ey/RustPython into TheAnyKey/p38_named_expr
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Python 3.8 instroduced named expressions or assignment expressions with PEP 572. Now it is possible
Most of the CPython tests are already passing. There are some scoping issues with mutli level (e.g., when a comprehension is inside of a comprehension, the asignments from the inner one are not leaked to the scope outside of the outer comrpehension). Further, there are no error messages when (ab)using iterator variables in named expressions. Both are generic topicsin RustPython and require a bit of rework in the symboltable and some other parts. As the functionality is complete besides of the scope limitation I propose to accept this PR.