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Report type names in return value policy-related cast exceptions (#1965)

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This commit is contained in:
Hans Dembinski 2019-10-23 12:19:58 +01:00 committed by Wenzel Jakob
parent c27a6e1378
commit bdf6a5e870
2 changed files with 26 additions and 9 deletions
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29
include/pybind11/cast.h
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@ -533,9 +533,17 @@ public:
case return_value_policy::copy: case return_value_policy::copy:
if (copy_constructor) if (copy_constructor)
valueptr = copy_constructor(src); valueptr = copy_constructor(src);
else else {
throw cast_error("return_value_policy = copy, but the " #if defined(NDEBUG)
"object is non-copyable!"); throw cast_error("return_value_policy = copy, but type is "
"non-copyable! (compile in debug mode for details)");
#else
std::string type_name(tinfo->cpptype->name());
detail::clean_type_id(type_name);
throw cast_error("return_value_policy = copy, but type " +
type_name + " is non-copyable!");
#endif
}
wrapper->owned = true; wrapper->owned = true;
break; break;
@ -544,9 +552,18 @@ public:
valueptr = move_constructor(src); valueptr = move_constructor(src);
else if (copy_constructor) else if (copy_constructor)
valueptr = copy_constructor(src); valueptr = copy_constructor(src);
else else {
throw cast_error("return_value_policy = move, but the " #if defined(NDEBUG)
"object is neither movable nor copyable!"); throw cast_error("return_value_policy = move, but type is neither "
"movable nor copyable! "
"(compile in debug mode for details)");
#else
std::string type_name(tinfo->cpptype->name());
detail::clean_type_id(type_name);
throw cast_error("return_value_policy = move, but type " +
type_name + " is neither movable nor copyable!");
#endif
}
wrapper->owned = true; wrapper->owned = true;
break; break;

6
tests/test_copy_move.py
View File

@ -5,13 +5,13 @@ from pybind11_tests import copy_move_policies as m
def test_lacking_copy_ctor(): def test_lacking_copy_ctor():
with pytest.raises(RuntimeError) as excinfo: with pytest.raises(RuntimeError) as excinfo:
m.lacking_copy_ctor.get_one() m.lacking_copy_ctor.get_one()
assert "the object is non-copyable!" in str(excinfo.value) assert "is non-copyable!" in str(excinfo.value)
def test_lacking_move_ctor(): def test_lacking_move_ctor():
with pytest.raises(RuntimeError) as excinfo: with pytest.raises(RuntimeError) as excinfo:
m.lacking_move_ctor.get_one() m.lacking_move_ctor.get_one()
assert "the object is neither movable nor copyable!" in str(excinfo.value) assert "is neither movable nor copyable!" in str(excinfo.value)
def test_move_and_copy_casts(): def test_move_and_copy_casts():
@ -98,7 +98,7 @@ def test_private_op_new():
with pytest.raises(RuntimeError) as excinfo: with pytest.raises(RuntimeError) as excinfo:
m.private_op_new_value() m.private_op_new_value()
assert "the object is neither movable nor copyable" in str(excinfo.value) assert "is neither movable nor copyable" in str(excinfo.value)
assert m.private_op_new_reference().value == 1 assert m.private_op_new_reference().value == 1