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Add type_caster<std::monostate> (#3818)

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* Add type_caster<std::monostate> for std::variant

Add type_caster<std::monostate>, allowing std::variant<std::monostate, ...>

* Add  variant<std::monostate, ...> test methods

* Add std::monostate tests

* Update test_stl.py

Remove erroneous extra tests

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Update test fn name

* And update the doc() test

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
This commit is contained in:
Laramie Leavitt
2022-03-21 22:58:04 -07:00
committed by GitHub
parent 67089cd3e6
commit b22ee64c73
3 changed files with 37 additions and 2 deletions
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16
tests/test_stl.py
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@@ -263,6 +263,22 @@ def test_variant(doc):
)
@pytest.mark.skipif(
not hasattr(m, "load_monostate_variant"), reason="no std::monostate"
)
def test_variant_monostate(doc):
assert m.load_monostate_variant(None) == "std::monostate"
assert m.load_monostate_variant(1) == "int"
assert m.load_monostate_variant("1") == "std::string"
assert m.cast_monostate_variant() == (None, 5, "Hello")
assert (
doc(m.load_monostate_variant)
== "load_monostate_variant(arg0: Union[None, int, str]) -> str"
)
def test_vec_of_reference_wrapper():
"""#171: Can't return reference wrappers (or STL structures containing them)"""
assert (