Message392848
In #44010, we are trying, as best as is possible with comprehensible REs, to identify in which circumstances occurrences of 'match', 'case' and '_' are keywords, and should be marked as such. I was initially unsure and even wrong about '_'.
1. Capture Patterns: I was confused by 'And is instead...'. 'It is instead ...', where 'it' refers to '_', is clearer to me.
2. Wildcard Patterns: "'_' is a soft keyword" just says it sometimes is and sometimes is not, but not when, or rather, where. After experiments like this (using the new IDLE 'copy with prompts' option ;-):
>>> _ = 'a'
>>> match [_, 'b']:
... case [capture, _] if _ == 'a':
... print(capture, _)
...
a a
I added (in PR to come, with markup that might be improved)
"within any pattern, but only within patterns. It is an identifier, as usual, even within ``match`` headers, ``guards``, and ``case blocks``.
Please consider also adding an example like the above. |
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Date |
User |
Action |
Args |
2021-05-04 02:04:38 | terry.reedy | set | recipients:
+ terry.reedy, gvanrossum, docs@python, brandtbucher |
2021-05-04 02:04:38 | terry.reedy | set | messageid: <1620093878.28.0.805814541074.issue44025@roundup.psfhosted.org> |
2021-05-04 02:04:38 | terry.reedy | link | issue44025 messages |
2021-05-04 02:04:37 | terry.reedy | create | |
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