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…2-3) Slash-positional and star-keyword parameters lower into the named-parameter machinery instead of fencing at the signature. Binding enforces CPython rules in _fill_args/_fill_varargs: positional-only parameters refuse keywords, keyword-only parameters refuse positional slots and must be passed by name. **kwargs capture stays fenced (T2-4).
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Summary
Tier-2 signature-shape normalization:
def f(a, /, b)anddef f(a, *, k, k2=1)now lower instead of fencing with PS1202 at the signature._signaturebuilds params fromposonlyargs + args(defaults still cover the tail) then appendskwonlyargswithkw_defaults; params carry"posonly"/"kwonly"flags.**kwargsstays fenced (T2-4)._fill_args/_fill_varargsenforce CPython binding: positional-only parameters refuse keywords (new PS2003 message), keyword-only parameters refuse positional slots and must be passed by name, otherwise their defaults apply.*argsalready lowered;f(1, *rest, k=…)now bindsktoo.New
tests/test_t2_param_forms.py: 6 oracle-diff cases vs CPython (pos-only, kw-only, defaults, mixed,*args+ kw-only, methodself, /) plus 4 refusal cases.Pins:
test_pyjwt_compatre-pinned 103 → 107 — removing the PS1202 signature fence lets kw-only defs lower further and report deeper, more accurate fences.test_census_selfuntouched; new census: lines 20424 (+36), modules 27, fences 1024 (+1 in_classes), definitions 733, fencedDefinitions 624.Link to Devin session: https://app.devin.ai/sessions/38fde61b38b448c4a57571fa3e18ffd4
Open in Devin Desktop: https://app.devin.ai/desktop/session/38fde61b38b448c4a57571fa3e18ffd4?variant=devin
Requested by: @espetro