2020-07-20 17:35:21 +00:00
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# -*- coding: utf-8 -*-
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2017-02-15 20:10:25 +00:00
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import pytest
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2020-08-16 20:02:12 +00:00
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import env # noqa: F401
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2017-04-21 21:14:22 +00:00
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from pybind11_tests import ConstructorStats
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2017-07-25 04:05:15 +00:00
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from pybind11_tests import multiple_inheritance as m
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2017-02-15 20:10:25 +00:00
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2016-11-20 20:21:54 +00:00
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def test_multiple_inheritance_cpp():
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2017-07-25 04:05:15 +00:00
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mt = m.MIType(3, 4)
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2016-09-11 11:00:40 +00:00
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assert mt.foo() == 3
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assert mt.bar() == 4
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2020-08-16 20:02:12 +00:00
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@pytest.mark.skipif("env.PYPY and env.PY2")
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@pytest.mark.xfail("env.PYPY and not env.PY2")
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2016-11-20 20:21:54 +00:00
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def test_multiple_inheritance_mix1():
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2016-09-11 11:00:40 +00:00
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class Base1:
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def __init__(self, i):
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self.i = i
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def foo(self):
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return self.i
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2017-07-25 04:05:15 +00:00
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class MITypePy(Base1, m.Base2):
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2016-09-11 11:00:40 +00:00
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def __init__(self, i, j):
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Base1.__init__(self, i)
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2017-07-25 04:05:15 +00:00
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m.Base2.__init__(self, j)
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2016-09-11 11:00:40 +00:00
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mt = MITypePy(3, 4)
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assert mt.foo() == 3
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assert mt.bar() == 4
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2016-11-20 20:21:54 +00:00
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def test_multiple_inheritance_mix2():
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2016-09-11 11:00:40 +00:00
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class Base2:
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def __init__(self, i):
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self.i = i
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def bar(self):
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return self.i
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2017-07-25 04:05:15 +00:00
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class MITypePy(m.Base1, Base2):
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2016-09-11 11:00:40 +00:00
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def __init__(self, i, j):
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2017-07-25 04:05:15 +00:00
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m.Base1.__init__(self, i)
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2016-09-11 11:00:40 +00:00
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Base2.__init__(self, j)
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mt = MITypePy(3, 4)
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assert mt.foo() == 3
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assert mt.bar() == 4
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2020-08-16 20:02:12 +00:00
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@pytest.mark.skipif("env.PYPY and env.PY2")
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@pytest.mark.xfail("env.PYPY and not env.PY2")
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2017-02-23 02:36:09 +00:00
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def test_multiple_inheritance_python():
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2017-02-15 20:10:25 +00:00
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2017-07-25 04:05:15 +00:00
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class MI1(m.Base1, m.Base2):
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2017-02-23 02:36:09 +00:00
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def __init__(self, i, j):
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2017-07-25 04:05:15 +00:00
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m.Base1.__init__(self, i)
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m.Base2.__init__(self, j)
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2017-02-23 02:36:09 +00:00
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class B1(object):
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def v(self):
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return 1
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2017-07-25 04:05:15 +00:00
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class MI2(B1, m.Base1, m.Base2):
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2017-02-23 02:36:09 +00:00
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def __init__(self, i, j):
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B1.__init__(self)
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2017-07-25 04:05:15 +00:00
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m.Base1.__init__(self, i)
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m.Base2.__init__(self, j)
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2017-02-23 02:36:09 +00:00
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class MI3(MI2):
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def __init__(self, i, j):
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MI2.__init__(self, i, j)
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2017-07-25 04:05:15 +00:00
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class MI4(MI3, m.Base2):
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Allow binding factory functions as constructors
This allows you to use:
cls.def(py::init(&factory_function));
where `factory_function` returns a pointer, holder, or value of the
class type (or a derived type). Various compile-time checks
(static_asserts) are performed to ensure the function is valid, and
various run-time type checks where necessary.
Some other details of this feature:
- The `py::init` name doesn't conflict with the templated no-argument
`py::init<...>()`, but keeps the naming consistent: the existing
templated, no-argument one wraps constructors, the no-template,
function-argument one wraps factory functions.
- If returning a CppClass (whether by value or pointer) when an CppAlias
is required (i.e. python-side inheritance and a declared alias), a
dynamic_cast to the alias is attempted (for the pointer version); if
it fails, or if returned by value, an Alias(Class &&) constructor
is invoked. If this constructor doesn't exist, a runtime error occurs.
- for holder returns when an alias is required, we try a dynamic_cast of
the wrapped pointer to the alias to see if it is already an alias
instance; if it isn't, we raise an error.
- `py::init(class_factory, alias_factory)` is also available that takes
two factories: the first is called when an alias is not needed, the
second when it is.
- Reimplement factory instance clearing. The previous implementation
failed under python-side multiple inheritance: *each* inherited
type's factory init would clear the instance instead of only setting
its own type value. The new implementation here clears just the
relevant value pointer.
- dealloc is updated to explicitly set the leftover value pointer to
nullptr and the `holder_constructed` flag to false so that it can be
used to clear preallocated value without needing to rebuild the
instance internals data.
- Added various tests to test out new allocation/deallocation code.
- With preallocation now done lazily, init factory holders can
completely avoid the extra overhead of needing an extra
allocation/deallocation.
- Updated documentation to make factory constructors the default
advanced constructor style.
- If an `__init__` is called a second time, we have two choices: we can
throw away the first instance, replacing it with the second; or we can
ignore the second call. The latter is slightly easier, so do that.
2017-06-13 01:52:48 +00:00
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def __init__(self, i, j):
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MI3.__init__(self, i, j)
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2017-08-17 04:01:42 +00:00
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# This should be ignored (Base2 is already initialized via MI2):
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m.Base2.__init__(self, i + 100)
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2017-02-23 02:36:09 +00:00
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2017-07-25 04:05:15 +00:00
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class MI5(m.Base2, B1, m.Base1):
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2017-02-23 02:36:09 +00:00
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def __init__(self, i, j):
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B1.__init__(self)
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2017-07-25 04:05:15 +00:00
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m.Base1.__init__(self, i)
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m.Base2.__init__(self, j)
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2017-02-23 02:36:09 +00:00
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2017-07-25 04:05:15 +00:00
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class MI6(m.Base2, B1):
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2017-02-23 02:36:09 +00:00
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def __init__(self, i):
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2017-07-25 04:05:15 +00:00
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m.Base2.__init__(self, i)
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2017-02-23 02:36:09 +00:00
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B1.__init__(self)
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class B2(B1):
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def v(self):
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return 2
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class B3(object):
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def v(self):
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return 3
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class B4(B3, B2):
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def v(self):
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return 4
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class MI7(B4, MI6):
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def __init__(self, i):
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B4.__init__(self)
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MI6.__init__(self, i)
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class MI8(MI6, B3):
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def __init__(self, i):
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MI6.__init__(self, i)
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B3.__init__(self)
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class MI8b(B3, MI6):
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def __init__(self, i):
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B3.__init__(self)
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MI6.__init__(self, i)
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mi1 = MI1(1, 2)
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assert mi1.foo() == 1
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assert mi1.bar() == 2
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mi2 = MI2(3, 4)
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assert mi2.v() == 1
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assert mi2.foo() == 3
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assert mi2.bar() == 4
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mi3 = MI3(5, 6)
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assert mi3.v() == 1
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assert mi3.foo() == 5
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assert mi3.bar() == 6
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Allow binding factory functions as constructors
This allows you to use:
cls.def(py::init(&factory_function));
where `factory_function` returns a pointer, holder, or value of the
class type (or a derived type). Various compile-time checks
(static_asserts) are performed to ensure the function is valid, and
various run-time type checks where necessary.
Some other details of this feature:
- The `py::init` name doesn't conflict with the templated no-argument
`py::init<...>()`, but keeps the naming consistent: the existing
templated, no-argument one wraps constructors, the no-template,
function-argument one wraps factory functions.
- If returning a CppClass (whether by value or pointer) when an CppAlias
is required (i.e. python-side inheritance and a declared alias), a
dynamic_cast to the alias is attempted (for the pointer version); if
it fails, or if returned by value, an Alias(Class &&) constructor
is invoked. If this constructor doesn't exist, a runtime error occurs.
- for holder returns when an alias is required, we try a dynamic_cast of
the wrapped pointer to the alias to see if it is already an alias
instance; if it isn't, we raise an error.
- `py::init(class_factory, alias_factory)` is also available that takes
two factories: the first is called when an alias is not needed, the
second when it is.
- Reimplement factory instance clearing. The previous implementation
failed under python-side multiple inheritance: *each* inherited
type's factory init would clear the instance instead of only setting
its own type value. The new implementation here clears just the
relevant value pointer.
- dealloc is updated to explicitly set the leftover value pointer to
nullptr and the `holder_constructed` flag to false so that it can be
used to clear preallocated value without needing to rebuild the
instance internals data.
- Added various tests to test out new allocation/deallocation code.
- With preallocation now done lazily, init factory holders can
completely avoid the extra overhead of needing an extra
allocation/deallocation.
- Updated documentation to make factory constructors the default
advanced constructor style.
- If an `__init__` is called a second time, we have two choices: we can
throw away the first instance, replacing it with the second; or we can
ignore the second call. The latter is slightly easier, so do that.
2017-06-13 01:52:48 +00:00
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mi4 = MI4(7, 8)
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2017-02-23 02:36:09 +00:00
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assert mi4.v() == 1
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Allow binding factory functions as constructors
This allows you to use:
cls.def(py::init(&factory_function));
where `factory_function` returns a pointer, holder, or value of the
class type (or a derived type). Various compile-time checks
(static_asserts) are performed to ensure the function is valid, and
various run-time type checks where necessary.
Some other details of this feature:
- The `py::init` name doesn't conflict with the templated no-argument
`py::init<...>()`, but keeps the naming consistent: the existing
templated, no-argument one wraps constructors, the no-template,
function-argument one wraps factory functions.
- If returning a CppClass (whether by value or pointer) when an CppAlias
is required (i.e. python-side inheritance and a declared alias), a
dynamic_cast to the alias is attempted (for the pointer version); if
it fails, or if returned by value, an Alias(Class &&) constructor
is invoked. If this constructor doesn't exist, a runtime error occurs.
- for holder returns when an alias is required, we try a dynamic_cast of
the wrapped pointer to the alias to see if it is already an alias
instance; if it isn't, we raise an error.
- `py::init(class_factory, alias_factory)` is also available that takes
two factories: the first is called when an alias is not needed, the
second when it is.
- Reimplement factory instance clearing. The previous implementation
failed under python-side multiple inheritance: *each* inherited
type's factory init would clear the instance instead of only setting
its own type value. The new implementation here clears just the
relevant value pointer.
- dealloc is updated to explicitly set the leftover value pointer to
nullptr and the `holder_constructed` flag to false so that it can be
used to clear preallocated value without needing to rebuild the
instance internals data.
- Added various tests to test out new allocation/deallocation code.
- With preallocation now done lazily, init factory holders can
completely avoid the extra overhead of needing an extra
allocation/deallocation.
- Updated documentation to make factory constructors the default
advanced constructor style.
- If an `__init__` is called a second time, we have two choices: we can
throw away the first instance, replacing it with the second; or we can
ignore the second call. The latter is slightly easier, so do that.
2017-06-13 01:52:48 +00:00
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assert mi4.foo() == 7
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assert mi4.bar() == 8
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2017-02-23 02:36:09 +00:00
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mi5 = MI5(10, 11)
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assert mi5.v() == 1
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assert mi5.foo() == 10
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assert mi5.bar() == 11
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mi6 = MI6(12)
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assert mi6.v() == 1
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assert mi6.bar() == 12
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mi7 = MI7(13)
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assert mi7.v() == 4
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assert mi7.bar() == 13
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mi8 = MI8(14)
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assert mi8.v() == 1
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assert mi8.bar() == 14
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mi8b = MI8b(15)
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assert mi8b.v() == 3
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assert mi8b.bar() == 15
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def test_multiple_inheritance_python_many_bases():
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2017-07-25 04:05:15 +00:00
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class MIMany14(m.BaseN1, m.BaseN2, m.BaseN3, m.BaseN4):
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2017-02-23 02:36:09 +00:00
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def __init__(self):
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2017-07-25 04:05:15 +00:00
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m.BaseN1.__init__(self, 1)
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m.BaseN2.__init__(self, 2)
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m.BaseN3.__init__(self, 3)
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m.BaseN4.__init__(self, 4)
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2017-02-23 02:36:09 +00:00
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2017-07-25 04:05:15 +00:00
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class MIMany58(m.BaseN5, m.BaseN6, m.BaseN7, m.BaseN8):
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2017-02-23 02:36:09 +00:00
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def __init__(self):
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2017-07-25 04:05:15 +00:00
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m.BaseN5.__init__(self, 5)
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m.BaseN6.__init__(self, 6)
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m.BaseN7.__init__(self, 7)
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m.BaseN8.__init__(self, 8)
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2017-02-23 02:36:09 +00:00
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2017-07-25 04:05:15 +00:00
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class MIMany916(m.BaseN9, m.BaseN10, m.BaseN11, m.BaseN12, m.BaseN13, m.BaseN14, m.BaseN15,
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m.BaseN16):
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2017-02-23 02:36:09 +00:00
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def __init__(self):
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2017-07-25 04:05:15 +00:00
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m.BaseN9.__init__(self, 9)
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m.BaseN10.__init__(self, 10)
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m.BaseN11.__init__(self, 11)
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m.BaseN12.__init__(self, 12)
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m.BaseN13.__init__(self, 13)
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m.BaseN14.__init__(self, 14)
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m.BaseN15.__init__(self, 15)
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m.BaseN16.__init__(self, 16)
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class MIMany19(MIMany14, MIMany58, m.BaseN9):
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2017-02-23 02:36:09 +00:00
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def __init__(self):
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MIMany14.__init__(self)
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MIMany58.__init__(self)
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2017-07-25 04:05:15 +00:00
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m.BaseN9.__init__(self, 9)
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2017-02-23 02:36:09 +00:00
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2017-07-25 04:05:15 +00:00
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class MIMany117(MIMany14, MIMany58, MIMany916, m.BaseN17):
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2017-02-23 02:36:09 +00:00
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def __init__(self):
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MIMany14.__init__(self)
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MIMany58.__init__(self)
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MIMany916.__init__(self)
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2017-07-25 04:05:15 +00:00
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m.BaseN17.__init__(self, 17)
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2017-02-23 02:36:09 +00:00
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# Inherits from 4 registered C++ classes: can fit in one pointer on any modern arch:
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a = MIMany14()
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for i in range(1, 4):
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assert getattr(a, "f" + str(i))() == 2 * i
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# Inherits from 8: requires 1/2 pointers worth of holder flags on 32/64-bit arch:
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b = MIMany916()
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for i in range(9, 16):
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assert getattr(b, "f" + str(i))() == 2 * i
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# Inherits from 9: requires >= 2 pointers worth of holder flags
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c = MIMany19()
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for i in range(1, 9):
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assert getattr(c, "f" + str(i))() == 2 * i
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# Inherits from 17: requires >= 3 pointers worth of holder flags
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d = MIMany117()
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for i in range(1, 17):
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assert getattr(d, "f" + str(i))() == 2 * i
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2017-02-15 20:10:25 +00:00
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2016-11-20 20:21:54 +00:00
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def test_multiple_inheritance_virtbase():
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2016-09-11 11:00:40 +00:00
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2017-07-25 04:05:15 +00:00
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class MITypePy(m.Base12a):
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2016-09-11 11:00:40 +00:00
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def __init__(self, i, j):
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2017-07-25 04:05:15 +00:00
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m.Base12a.__init__(self, i, j)
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2016-09-11 11:00:40 +00:00
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mt = MITypePy(3, 4)
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assert mt.bar() == 4
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2017-07-25 04:05:15 +00:00
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assert m.bar_base2a(mt) == 4
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assert m.bar_base2a_sharedptr(mt) == 4
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2017-02-15 20:10:25 +00:00
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def test_mi_static_properties():
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"""Mixing bases with and without static properties should be possible
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and the result should be independent of base definition order"""
|
|
|
|
|
2017-07-25 04:05:15 +00:00
|
|
|
for d in (m.VanillaStaticMix1(), m.VanillaStaticMix2()):
|
2017-02-15 20:10:25 +00:00
|
|
|
assert d.vanilla() == "Vanilla"
|
|
|
|
assert d.static_func1() == "WithStatic1"
|
|
|
|
assert d.static_func2() == "WithStatic2"
|
|
|
|
assert d.static_func() == d.__class__.__name__
|
|
|
|
|
2017-07-25 04:05:15 +00:00
|
|
|
m.WithStatic1.static_value1 = 1
|
|
|
|
m.WithStatic2.static_value2 = 2
|
2017-02-15 20:10:25 +00:00
|
|
|
assert d.static_value1 == 1
|
|
|
|
assert d.static_value2 == 2
|
|
|
|
assert d.static_value == 12
|
|
|
|
|
|
|
|
d.static_value1 = 0
|
|
|
|
assert d.static_value1 == 0
|
|
|
|
d.static_value2 = 0
|
|
|
|
assert d.static_value2 == 0
|
|
|
|
d.static_value = 0
|
|
|
|
assert d.static_value == 0
|
|
|
|
|
|
|
|
|
2020-08-16 20:02:12 +00:00
|
|
|
# Requires PyPy 6+
|
2017-02-15 20:10:25 +00:00
|
|
|
def test_mi_dynamic_attributes():
|
|
|
|
"""Mixing bases with and without dynamic attribute support"""
|
|
|
|
|
2017-07-25 04:05:15 +00:00
|
|
|
for d in (m.VanillaDictMix1(), m.VanillaDictMix2()):
|
2017-02-15 20:10:25 +00:00
|
|
|
d.dynamic = 1
|
|
|
|
assert d.dynamic == 1
|
2017-04-21 21:14:22 +00:00
|
|
|
|
|
|
|
|
2017-04-21 23:01:30 +00:00
|
|
|
def test_mi_unaligned_base():
|
|
|
|
"""Returning an offset (non-first MI) base class pointer should recognize the instance"""
|
|
|
|
|
|
|
|
n_inst = ConstructorStats.detail_reg_inst()
|
|
|
|
|
2017-07-25 04:05:15 +00:00
|
|
|
c = m.I801C()
|
|
|
|
d = m.I801D()
|
2017-04-21 23:01:30 +00:00
|
|
|
# + 4 below because we have the two instances, and each instance has offset base I801B2
|
|
|
|
assert ConstructorStats.detail_reg_inst() == n_inst + 4
|
2017-07-25 04:05:15 +00:00
|
|
|
b1c = m.i801b1_c(c)
|
2017-04-21 23:01:30 +00:00
|
|
|
assert b1c is c
|
2017-07-25 04:05:15 +00:00
|
|
|
b2c = m.i801b2_c(c)
|
2017-04-21 23:01:30 +00:00
|
|
|
assert b2c is c
|
2017-07-25 04:05:15 +00:00
|
|
|
b1d = m.i801b1_d(d)
|
2017-04-21 23:01:30 +00:00
|
|
|
assert b1d is d
|
2017-07-25 04:05:15 +00:00
|
|
|
b2d = m.i801b2_d(d)
|
2017-04-21 23:01:30 +00:00
|
|
|
assert b2d is d
|
|
|
|
|
|
|
|
assert ConstructorStats.detail_reg_inst() == n_inst + 4 # no extra instances
|
|
|
|
del c, b1c, b2c
|
|
|
|
assert ConstructorStats.detail_reg_inst() == n_inst + 2
|
|
|
|
del d, b1d, b2d
|
|
|
|
assert ConstructorStats.detail_reg_inst() == n_inst
|
|
|
|
|
|
|
|
|
2017-04-21 21:14:22 +00:00
|
|
|
def test_mi_base_return():
|
|
|
|
"""Tests returning an offset (non-first MI) base class pointer to a derived instance"""
|
|
|
|
|
|
|
|
n_inst = ConstructorStats.detail_reg_inst()
|
|
|
|
|
2017-07-25 04:05:15 +00:00
|
|
|
c1 = m.i801c_b1()
|
|
|
|
assert type(c1) is m.I801C
|
2017-04-21 21:14:22 +00:00
|
|
|
assert c1.a == 1
|
|
|
|
assert c1.b == 2
|
|
|
|
|
2017-07-25 04:05:15 +00:00
|
|
|
d1 = m.i801d_b1()
|
|
|
|
assert type(d1) is m.I801D
|
2017-04-21 21:14:22 +00:00
|
|
|
assert d1.a == 1
|
|
|
|
assert d1.b == 2
|
|
|
|
|
2017-04-21 23:01:30 +00:00
|
|
|
assert ConstructorStats.detail_reg_inst() == n_inst + 4
|
2017-04-21 21:14:22 +00:00
|
|
|
|
2017-07-25 04:05:15 +00:00
|
|
|
c2 = m.i801c_b2()
|
|
|
|
assert type(c2) is m.I801C
|
2017-04-21 21:14:22 +00:00
|
|
|
assert c2.a == 1
|
|
|
|
assert c2.b == 2
|
|
|
|
|
2017-07-25 04:05:15 +00:00
|
|
|
d2 = m.i801d_b2()
|
|
|
|
assert type(d2) is m.I801D
|
2017-04-21 21:14:22 +00:00
|
|
|
assert d2.a == 1
|
|
|
|
assert d2.b == 2
|
|
|
|
|
2017-04-21 23:01:30 +00:00
|
|
|
assert ConstructorStats.detail_reg_inst() == n_inst + 8
|
2017-04-21 21:14:22 +00:00
|
|
|
|
|
|
|
del c2
|
2017-04-21 23:01:30 +00:00
|
|
|
assert ConstructorStats.detail_reg_inst() == n_inst + 6
|
2017-04-21 21:14:22 +00:00
|
|
|
del c1, d1, d2
|
|
|
|
assert ConstructorStats.detail_reg_inst() == n_inst
|
|
|
|
|
|
|
|
# Returning an unregistered derived type with a registered base; we won't
|
|
|
|
# pick up the derived type, obviously, but should still work (as an object
|
|
|
|
# of whatever type was returned).
|
2017-07-25 04:05:15 +00:00
|
|
|
e1 = m.i801e_c()
|
|
|
|
assert type(e1) is m.I801C
|
2017-04-21 21:14:22 +00:00
|
|
|
assert e1.a == 1
|
|
|
|
assert e1.b == 2
|
|
|
|
|
2017-07-25 04:05:15 +00:00
|
|
|
e2 = m.i801e_b2()
|
|
|
|
assert type(e2) is m.I801B2
|
2017-04-21 21:14:22 +00:00
|
|
|
assert e2.b == 2
|
2017-07-25 04:53:23 +00:00
|
|
|
|
|
|
|
|
|
|
|
def test_diamond_inheritance():
|
|
|
|
"""Tests that diamond inheritance works as expected (issue #959)"""
|
|
|
|
|
|
|
|
# Issue #959: this shouldn't segfault:
|
|
|
|
d = m.D()
|
|
|
|
|
|
|
|
# Make sure all the various distinct pointers are all recognized as registered instances:
|
|
|
|
assert d is d.c0()
|
|
|
|
assert d is d.c1()
|
|
|
|
assert d is d.b()
|
|
|
|
assert d is d.c0().b()
|
|
|
|
assert d is d.c1().b()
|
|
|
|
assert d is d.c0().c1().b().c0().b()
|