I have read a great deal of discussion on the pattern matching PEPs and
less formal discussions. It is possible I have overlooked some post in all
of that, of course.
... OK, just saw Guido's "wait for new SC" comment, which I suppose applies
to this too :-).
One idea that I cannot recall seeing, but that seems to make sense to me
and fit with Python's feel is using a WORD to distinguish between a
variable value and a binding target. That is, instead of a special symbol
prefixing or suffixing a name, either to indicate it is or is not a binding
target. Of course, whether the extra word would be used for binding or for
NOT binding is a question still.
NOT_FOUND = 404
match http_code:
case 200:
print("OK document")
case value NOT_FOUND: # use the variable value
print("Document not found")
case OTHER_CODE: # bind this name
print("Other HTTP code", OTHER_CODE)
Of course, this would require a soft keyword, which is a disadvantage.
Going the other direction:
NOT_FOUND = 404
match http_code:
case 200:
print("OK document")
case NOT_FOUND: # use the variable value
print("Document not found")
case bind OTHER_CODE: # bind this name
print("Other HTTP code")
To me these read better than the punctuation characters. But I guess some
folks have suggested enlisting 'as', which is a word, of course.
--
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from the bellies of the hungry; books from the hands of the
uneducated; technology from the underdeveloped; and putting
advocates of freedom in prisons. Intellectual property is
to the 21st century what the slave trade was to the 16th.
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