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Python: Model @typing.overload in method resolution

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Adds `hasOverloadDecorator` as a predicate on functions. It looks for
decorators called `overload` or `something.overload` (usually
`typing.overload` or `t.overload`). These are then filtered out in the
predicates that (approximate) resolving methods according to the MRO.

As the test introduced in the previous commit shows, this removes the
spurious resolutions we had before.
This commit is contained in:
Taus
2026-03-05 16:56:03 +00:00
parent 0561a63003
commit fa61f6f3df
2 changed files with 23 additions and 5 deletions
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8
python/ql/test/library-tests/dataflow/calls-overload/test.py
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@@ -11,8 +11,8 @@ class OverloadedInit:
def __init__(self, x, y=None):
pass
OverloadedInit(1) # $ init=OverloadedInit.__init__:11 SPURIOUS: init=OverloadedInit.__init__:6 init=OverloadedInit.__init__:9
OverloadedInit("a", "b") # $ init=OverloadedInit.__init__:11 SPURIOUS: init=OverloadedInit.__init__:6 init=OverloadedInit.__init__:9
OverloadedInit(1) # $ init=OverloadedInit.__init__:11
OverloadedInit("a", "b") # $ init=OverloadedInit.__init__:11
from typing import overload
@@ -28,8 +28,8 @@ class OverloadedInitFromImport:
def __init__(self, x, y=None):
pass
OverloadedInitFromImport(1) # $ init=OverloadedInitFromImport.__init__:28 SPURIOUS: init=OverloadedInitFromImport.__init__:23 init=OverloadedInitFromImport.__init__:26
OverloadedInitFromImport("a", "b") # $ init=OverloadedInitFromImport.__init__:28 SPURIOUS: init=OverloadedInitFromImport.__init__:23 init=OverloadedInitFromImport.__init__:26
OverloadedInitFromImport(1) # $ init=OverloadedInitFromImport.__init__:28
OverloadedInitFromImport("a", "b") # $ init=OverloadedInitFromImport.__init__:28
class NoOverloads: