New submission from Pablo Galindo Salgado <[email protected]>:
When a keyword is repeated in a call for instance:
'f(1, x=2, *(3, 4), x=5)'
we raise a SyntaxError:
File "lel.py", line 1
f(1, x=2, *(3, 4), x=5)
^
SyntaxError: keyword argument repeated
This error is raised from the AST but there is nothing technically wrong with
that code from the grammar perspective. Indeed, the grammar must accepts that
code, but the check must fail later (in the compiler for instance) because the
code is semantically invalid. When working on the new PEG parser we have
encountered this situation and changing the parser would remove the check as it
is right now. For these reasons, the check should be moved from the AST to the
compiler.
----------
messages: 365537
nosy: pablogsal
priority: normal
severity: normal
status: open
title: Move checking for duplicated keywords to the compiler
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Python tracker <[email protected]>
<https://bugs.python.org/issue40147>
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