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6b52c838d7
This allows a slightly cleaner base type specification of:
py::class_<Type, Base>("Type")
as an alternative to
py::class_<Type>("Type", py::base<Base>())
As with the other template parameters, the order relative to the holder
or trampoline types doesn't matter.
This also includes a compile-time assertion failure if attempting to
specify more than one base class (but is easily extendible to support
multiple inheritance, someday, by updating the class_selector::set_bases
function to set multiple bases).
39 lines
1.3 KiB
Python
39 lines
1.3 KiB
Python
import pytest
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def test_inheritance(msg):
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from pybind11_tests import Pet, Dog, Rabbit, Hamster, dog_bark, pet_name_species
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roger = Rabbit('Rabbit')
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assert roger.name() + " is a " + roger.species() == "Rabbit is a parrot"
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assert pet_name_species(roger) == "Rabbit is a parrot"
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polly = Pet('Polly', 'parrot')
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assert polly.name() + " is a " + polly.species() == "Polly is a parrot"
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assert pet_name_species(polly) == "Polly is a parrot"
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molly = Dog('Molly')
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assert molly.name() + " is a " + molly.species() == "Molly is a dog"
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assert pet_name_species(molly) == "Molly is a dog"
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fred = Hamster('Fred')
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assert fred.name() + " is a " + fred.species() == "Fred is a rodent"
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assert dog_bark(molly) == "Woof!"
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with pytest.raises(TypeError) as excinfo:
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dog_bark(polly)
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assert msg(excinfo.value) == """
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Incompatible function arguments. The following argument types are supported:
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1. (arg0: m.Dog) -> str
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Invoked with: <m.Pet object at 0>
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"""
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def test_automatic_upcasting():
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from pybind11_tests import return_class_1, return_class_2, return_none
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assert type(return_class_1()).__name__ == "DerivedClass1"
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assert type(return_class_2()).__name__ == "DerivedClass2"
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assert type(return_none()).__name__ == "NoneType"
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