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There are two separate additions: 1. `py::hash(obj)` is equivalent to the Python `hash(obj)`. 2. `.def(hash(py::self))` registers the hash function defined by `std::hash<T>` as the Python hash function.
107 lines
3.3 KiB
Python
107 lines
3.3 KiB
Python
import pytest
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from pybind11_tests import operators as m
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from pybind11_tests import ConstructorStats
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def test_operator_overloading():
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v1 = m.Vector2(1, 2)
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v2 = m.Vector(3, -1)
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assert str(v1) == "[1.000000, 2.000000]"
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assert str(v2) == "[3.000000, -1.000000]"
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assert str(v1 + v2) == "[4.000000, 1.000000]"
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assert str(v1 - v2) == "[-2.000000, 3.000000]"
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assert str(v1 - 8) == "[-7.000000, -6.000000]"
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assert str(v1 + 8) == "[9.000000, 10.000000]"
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assert str(v1 * 8) == "[8.000000, 16.000000]"
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assert str(v1 / 8) == "[0.125000, 0.250000]"
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assert str(8 - v1) == "[7.000000, 6.000000]"
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assert str(8 + v1) == "[9.000000, 10.000000]"
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assert str(8 * v1) == "[8.000000, 16.000000]"
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assert str(8 / v1) == "[8.000000, 4.000000]"
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assert str(v1 * v2) == "[3.000000, -2.000000]"
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assert str(v2 / v1) == "[3.000000, -0.500000]"
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v1 += 2 * v2
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assert str(v1) == "[7.000000, 0.000000]"
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v1 -= v2
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assert str(v1) == "[4.000000, 1.000000]"
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v1 *= 2
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assert str(v1) == "[8.000000, 2.000000]"
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v1 /= 16
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assert str(v1) == "[0.500000, 0.125000]"
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v1 *= v2
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assert str(v1) == "[1.500000, -0.125000]"
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v2 /= v1
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assert str(v2) == "[2.000000, 8.000000]"
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assert hash(v1) == 4
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cstats = ConstructorStats.get(m.Vector2)
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assert cstats.alive() == 2
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del v1
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assert cstats.alive() == 1
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del v2
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assert cstats.alive() == 0
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assert cstats.values() == ['[1.000000, 2.000000]', '[3.000000, -1.000000]',
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'[4.000000, 1.000000]', '[-2.000000, 3.000000]',
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'[-7.000000, -6.000000]', '[9.000000, 10.000000]',
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'[8.000000, 16.000000]', '[0.125000, 0.250000]',
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'[7.000000, 6.000000]', '[9.000000, 10.000000]',
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'[8.000000, 16.000000]', '[8.000000, 4.000000]',
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'[3.000000, -2.000000]', '[3.000000, -0.500000]',
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'[6.000000, -2.000000]']
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assert cstats.default_constructions == 0
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assert cstats.copy_constructions == 0
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assert cstats.move_constructions >= 10
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assert cstats.copy_assignments == 0
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assert cstats.move_assignments == 0
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def test_operators_notimplemented():
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"""#393: need to return NotSupported to ensure correct arithmetic operator behavior"""
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c1, c2 = m.C1(), m.C2()
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assert c1 + c1 == 11
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assert c2 + c2 == 22
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assert c2 + c1 == 21
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assert c1 + c2 == 12
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def test_nested():
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"""#328: first member in a class can't be used in operators"""
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a = m.NestA()
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b = m.NestB()
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c = m.NestC()
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a += 10
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assert m.get_NestA(a) == 13
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b.a += 100
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assert m.get_NestA(b.a) == 103
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c.b.a += 1000
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assert m.get_NestA(c.b.a) == 1003
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b -= 1
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assert m.get_NestB(b) == 3
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c.b -= 3
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assert m.get_NestB(c.b) == 1
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c *= 7
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assert m.get_NestC(c) == 35
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abase = a.as_base()
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assert abase.value == -2
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a.as_base().value += 44
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assert abase.value == 42
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assert c.b.a.as_base().value == -2
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c.b.a.as_base().value += 44
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assert c.b.a.as_base().value == 42
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del c
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pytest.gc_collect()
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del a # Should't delete while abase is still alive
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pytest.gc_collect()
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assert abase.value == 42
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del abase, b
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pytest.gc_collect()
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