def test_numpy_ref_mutators():
"""Tests numpy mutating Eigen matrices (for returned Eigen::Ref<...>s)"""
from pybind11_tests import (
get_cm_ref, get_cm_const_ref, get_rm_ref, get_rm_const_ref, reset_refs)
reset_refs() # In case another test already changed it
zc = get_cm_ref()
zcro = get_cm_const_ref()
zr = get_rm_ref()
zrro = get_rm_const_ref()
assert [zc[1, 2], zcro[1, 2], zr[1, 2], zrro[1, 2]] == [23] * 4
assert not zc.flags.owndata and zc.flags.writeable
assert not zr.flags.owndata and zr.flags.writeable
assert not zcro.flags.owndata and not zcro.flags.writeable
assert not zrro.flags.owndata and not zrro.flags.writeable
zc[1, 2] = 99
expect = np.array([[11., 12, 13], [21, 22, 99], [31, 32, 33]])
# We should have just changed zc, of course, but also zcro and the original eigen matrix
assert np.all(zc == expect)
assert np.all(zcro == expect)
assert np.all(get_cm_ref() == expect)
zr[1, 2] = 99
assert np.all(zr == expect)
assert np.all(zrro == expect)
assert np.all(get_rm_ref() == expect)
# Make sure the readonly ones are numpy-readonly:
with pytest.raises(ValueError):
zcro[1, 2] = 6
with pytest.raises(ValueError):
zrro[1, 2] = 6
# We should be able to explicitly copy like this (and since we're copying,
# the const should drop away)
y1 = np.array(get_cm_const_ref())
assert y1.flags.owndata and y1.flags.writeable
# We should get copies of the eigen data, which was modified above:
assert y1[1, 2] == 99
y1[1, 2] += 12
assert y1[1, 2] == 111
assert zc[1, 2] == 99 # Make sure we aren't referencing the original
def test_numpy_ref_mutators():
"""Tests numpy mutating Eigen matrices (for returned Eigen::Ref<...>s)"""
from pybind11_tests import (
get_cm_ref, get_cm_const_ref, get_rm_ref, get_rm_const_ref, reset_refs)
reset_refs() # In case another test already changed it
zc = get_cm_ref()
zcro = get_cm_const_ref()
zr = get_rm_ref()
zrro = get_rm_const_ref()
assert [zc[1, 2], zcro[1, 2], zr[1, 2], zrro[1, 2]] == [23] * 4
assert not zc.flags.owndata and zc.flags.writeable
assert not zr.flags.owndata and zr.flags.writeable
assert not zcro.flags.owndata and not zcro.flags.writeable
assert not zrro.flags.owndata and not zrro.flags.writeable
zc[1, 2] = 99
expect = np.array([[11., 12, 13], [21, 22, 99], [31, 32, 33]])
# We should have just changed zc, of course, but also zcro and the original eigen matrix
assert np.all(zc == expect)
assert np.all(zcro == expect)
assert np.all(get_cm_ref() == expect)
zr[1, 2] = 99
assert np.all(zr == expect)
assert np.all(zrro == expect)
assert np.all(get_rm_ref() == expect)
# Make sure the readonly ones are numpy-readonly:
with pytest.raises(ValueError):
zcro[1, 2] = 6
with pytest.raises(ValueError):
zrro[1, 2] = 6
# We should be able to explicitly copy like this (and since we're copying,
# the const should drop away)
y1 = np.array(get_cm_const_ref())
assert y1.flags.owndata and y1.flags.writeable
# We should get copies of the eigen data, which was modified above:
assert y1[1, 2] == 99
y1[1, 2] += 12
assert y1[1, 2] == 111
assert zc[1, 2] == 99 # Make sure we aren't referencing the original
def test_cpp_casting():
from pybind11_tests import (cpp_copy, cpp_ref_c, cpp_ref_r, cpp_ref_any,
fixed_r, fixed_c, get_cm_ref, get_rm_ref, ReturnTester)
assert cpp_copy(fixed_r()) == 22.
assert cpp_copy(fixed_c()) == 22.
z = np.array([[5., 6], [7, 8]])
assert cpp_copy(z) == 7.
assert cpp_copy(get_cm_ref()) == 21.
assert cpp_copy(get_rm_ref()) == 21.
assert cpp_ref_c(get_cm_ref()) == 21.
assert cpp_ref_r(get_rm_ref()) == 21.
with pytest.raises(RuntimeError) as excinfo:
# Can't reference fixed_c: it contains floats, cpp_ref_any wants doubles
cpp_ref_any(fixed_c())
assert 'Unable to cast Python instance' in str(excinfo.value)
with pytest.raises(RuntimeError) as excinfo:
# Can't reference fixed_r: it contains floats, cpp_ref_any wants doubles
cpp_ref_any(fixed_r())
assert 'Unable to cast Python instance' in str(excinfo.value)
assert cpp_ref_any(ReturnTester.create()) == 1.
assert cpp_ref_any(get_cm_ref()) == 21.
assert cpp_ref_any(get_cm_ref()) == 21.
def test_cpp_casting():
from pybind11_tests import (cpp_copy, cpp_ref_c, cpp_ref_r, cpp_ref_any,
fixed_r, fixed_c, get_cm_ref, get_rm_ref, ReturnTester)
assert cpp_copy(fixed_r()) == 22.
assert cpp_copy(fixed_c()) == 22.
z = np.array([[5., 6], [7, 8]])
assert cpp_copy(z) == 7.
assert cpp_copy(get_cm_ref()) == 21.
assert cpp_copy(get_rm_ref()) == 21.
assert cpp_ref_c(get_cm_ref()) == 21.
assert cpp_ref_r(get_rm_ref()) == 21.
with pytest.raises(RuntimeError) as excinfo:
# Can't reference fixed_c: it contains floats, cpp_ref_any wants doubles
cpp_ref_any(fixed_c())
assert 'Unable to cast Python instance' in str(excinfo.value)
with pytest.raises(RuntimeError) as excinfo:
# Can't reference fixed_r: it contains floats, cpp_ref_any wants doubles
cpp_ref_any(fixed_r())
assert 'Unable to cast Python instance' in str(excinfo.value)
assert cpp_ref_any(ReturnTester.create()) == 1.
assert cpp_ref_any(get_cm_ref()) == 21.
assert cpp_ref_any(get_cm_ref()) == 21.
