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Introduce recursive_container_traits (#4623)
* Testing * Similar fix for std::vector * Fix infinite recursion check: 1) Apply to is_copy_assignable additionally 2) Check infinite recursion for map-like types * style: pre-commit fixes * Optional commit that demonstrates the limitations of this PR * Fix positioning of container bindings The bindings were previously in a block that was only activated if numpy was available. * Suggestions from code review: API side * Suggestions from code review: Test side * Suggestions from code review 1) Renaming: is_recursive_container and MutuallyRecursiveContainerPair(MV|VM) 2) Avoid ambiguous specializations of is_recursive_container * Some little fixes * Reordering of structs * Add recursive checks for is_move_constructible * Static testing for pybind11 type traits * More precise checking of recursive types Instead of a trait `is_recursive_container`, use a trait `recursive_container_traits` with dependent type `recursive_container_traits::type_to_check_recursively`. So, instead of just checking if a type is recursive and then trying to somehow deal with it, recursively-defined traits such as is_move_constructible can now directly ask this trait where the recursion should proceed. * Review suggestions 1. Use std::conditional 2. Fix typo * Remove leftover include from test --------- Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
This commit is contained in:
Franz Pöschel
GitHub
parent
b3e88ecf89
commit
f701654633
@ -822,26 +822,179 @@ using movable_cast_op_type
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typename std::add_rvalue_reference<intrinsic_t<T>>::type,
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typename std::add_lvalue_reference<intrinsic_t<T>>::type>>;
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// Does the container have a mapped type and is it recursive?
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// Implemented by specializations below.
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template <typename Container, typename SFINAE = void>
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struct container_mapped_type_traits {
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static constexpr bool has_mapped_type = false;
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static constexpr bool has_recursive_mapped_type = false;
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};
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template <typename Container>
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struct container_mapped_type_traits<
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Container,
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typename std::enable_if<
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std::is_same<typename Container::mapped_type, Container>::value>::type> {
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static constexpr bool has_mapped_type = true;
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static constexpr bool has_recursive_mapped_type = true;
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};
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template <typename Container>
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struct container_mapped_type_traits<
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Container,
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typename std::enable_if<
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negation<std::is_same<typename Container::mapped_type, Container>>::value>::type> {
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static constexpr bool has_mapped_type = true;
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static constexpr bool has_recursive_mapped_type = false;
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};
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// Does the container have a value type and is it recursive?
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// Implemented by specializations below.
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template <typename Container, typename SFINAE = void>
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struct container_value_type_traits : std::false_type {
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static constexpr bool has_value_type = false;
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static constexpr bool has_recursive_value_type = false;
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};
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template <typename Container>
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struct container_value_type_traits<
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Container,
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typename std::enable_if<
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std::is_same<typename Container::value_type, Container>::value>::type> {
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static constexpr bool has_value_type = true;
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static constexpr bool has_recursive_value_type = true;
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};
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template <typename Container>
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struct container_value_type_traits<
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Container,
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typename std::enable_if<
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negation<std::is_same<typename Container::value_type, Container>>::value>::type> {
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static constexpr bool has_value_type = true;
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static constexpr bool has_recursive_value_type = false;
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};
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/*
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* Tag to be used for representing the bottom of recursively defined types.
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* Define this tag so we don't have to use void.
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*/
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struct recursive_bottom {};
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/*
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* Implementation detail of `recursive_container_traits` below.
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* `T` is the `value_type` of the container, which might need to be modified to
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* avoid recursive types and const types.
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*/
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template <typename T, bool is_this_a_map>
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struct impl_type_to_check_recursively {
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/*
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* If the container is recursive, then no further recursion should be done.
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*/
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using if_recursive = recursive_bottom;
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/*
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* Otherwise yield `T` unchanged.
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*/
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using if_not_recursive = T;
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};
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/*
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* For pairs - only as value type of a map -, the first type should remove the `const`.
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* Also, if the map is recursive, then the recursive checking should consider
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* the first type only.
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*/
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template <typename A, typename B>
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struct impl_type_to_check_recursively<std::pair<A, B>, /* is_this_a_map = */ true> {
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using if_recursive = typename std::remove_const<A>::type;
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using if_not_recursive = std::pair<typename std::remove_const<A>::type, B>;
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};
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/*
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* Implementation of `recursive_container_traits` below.
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*/
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template <typename Container, typename SFINAE = void>
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struct impl_recursive_container_traits {
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using type_to_check_recursively = recursive_bottom;
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};
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template <typename Container>
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struct impl_recursive_container_traits<
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Container,
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typename std::enable_if<container_value_type_traits<Container>::has_value_type>::type> {
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static constexpr bool is_recursive
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= container_mapped_type_traits<Container>::has_recursive_mapped_type
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|| container_value_type_traits<Container>::has_recursive_value_type;
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/*
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* This member dictates which type Pybind11 should check recursively in traits
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* such as `is_move_constructible`, `is_copy_constructible`, `is_move_assignable`, ...
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* Direct access to `value_type` should be avoided:
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* 1. `value_type` might recursively contain the type again
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* 2. `value_type` of STL map types is `std::pair<A const, B>`, the `const`
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* should be removed.
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*
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*/
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using type_to_check_recursively = typename std::conditional<
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is_recursive,
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typename impl_type_to_check_recursively<
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typename Container::value_type,
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container_mapped_type_traits<Container>::has_mapped_type>::if_recursive,
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typename impl_type_to_check_recursively<
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typename Container::value_type,
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container_mapped_type_traits<Container>::has_mapped_type>::if_not_recursive>::type;
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};
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/*
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* This trait defines the `type_to_check_recursively` which is needed to properly
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* handle recursively defined traits such as `is_move_constructible` without going
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* into an infinite recursion.
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* Should be used instead of directly accessing the `value_type`.
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* It cancels the recursion by returning the `recursive_bottom` tag.
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*
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* The default definition of `type_to_check_recursively` is as follows:
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*
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* 1. By default, it is `recursive_bottom`, so that the recursion is canceled.
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* 2. If the type is non-recursive and defines a `value_type`, then the `value_type` is used.
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* If the `value_type` is a pair and a `mapped_type` is defined,
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* then the `const` is removed from the first type.
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* 3. If the type is recursive and `value_type` is not a pair, then `recursive_bottom` is returned.
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* 4. If the type is recursive and `value_type` is a pair and a `mapped_type` is defined,
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* then `const` is removed from the first type and the first type is returned.
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*
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* This behavior can be extended by the user as seen in test_stl_binders.cpp.
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*
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* This struct is exactly the same as impl_recursive_container_traits.
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* The duplication achieves that user-defined specializations don't compete
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* with internal specializations, but take precedence.
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*/
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template <typename Container, typename SFINAE = void>
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struct recursive_container_traits : impl_recursive_container_traits<Container> {};
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template <typename T>
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struct is_move_constructible
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: all_of<std::is_move_constructible<T>,
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is_move_constructible<
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typename recursive_container_traits<T>::type_to_check_recursively>> {};
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template <>
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struct is_move_constructible<recursive_bottom> : std::true_type {};
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// Likewise for std::pair
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// (after C++17 it is mandatory that the move constructor not exist when the two types aren't
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// themselves move constructible, but this can not be relied upon when T1 or T2 are themselves
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// containers).
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template <typename T1, typename T2>
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struct is_move_constructible<std::pair<T1, T2>>
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: all_of<is_move_constructible<T1>, is_move_constructible<T2>> {};
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// std::is_copy_constructible isn't quite enough: it lets std::vector<T> (and similar) through when
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// T is non-copyable, but code containing such a copy constructor fails to actually compile.
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template <typename T, typename SFINAE = void>
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struct is_copy_constructible : std::is_copy_constructible<T> {};
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template <typename T>
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struct is_copy_constructible
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: all_of<std::is_copy_constructible<T>,
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is_copy_constructible<
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typename recursive_container_traits<T>::type_to_check_recursively>> {};
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template <typename T, typename SFINAE = void>
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struct is_move_constructible : std::is_move_constructible<T> {};
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// Specialization for types that appear to be copy constructible but also look like stl containers
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// (we specifically check for: has `value_type` and `reference` with `reference = value_type&`): if
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// so, copy constructability depends on whether the value_type is copy constructible.
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template <typename Container>
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struct is_copy_constructible<
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Container,
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enable_if_t<
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all_of<std::is_copy_constructible<Container>,
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std::is_same<typename Container::value_type &, typename Container::reference>,
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// Avoid infinite recursion
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negation<std::is_same<Container, typename Container::value_type>>>::value>>
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: is_copy_constructible<typename Container::value_type> {};
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template <>
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struct is_copy_constructible<recursive_bottom> : std::true_type {};
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// Likewise for std::pair
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// (after C++17 it is mandatory that the copy constructor not exist when the two types aren't
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@ -852,14 +1005,16 @@ struct is_copy_constructible<std::pair<T1, T2>>
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: all_of<is_copy_constructible<T1>, is_copy_constructible<T2>> {};
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// The same problems arise with std::is_copy_assignable, so we use the same workaround.
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template <typename T, typename SFINAE = void>
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struct is_copy_assignable : std::is_copy_assignable<T> {};
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template <typename Container>
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struct is_copy_assignable<Container,
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enable_if_t<all_of<std::is_copy_assignable<Container>,
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std::is_same<typename Container::value_type &,
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typename Container::reference>>::value>>
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: is_copy_assignable<typename Container::value_type> {};
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template <typename T>
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struct is_copy_assignable
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: all_of<
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std::is_copy_assignable<T>,
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is_copy_assignable<typename recursive_container_traits<T>::type_to_check_recursively>> {
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};
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template <>
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struct is_copy_assignable<recursive_bottom> : std::true_type {};
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template <typename T1, typename T2>
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struct is_copy_assignable<std::pair<T1, T2>>
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: all_of<is_copy_assignable<T1>, is_copy_assignable<T2>> {};
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@ -61,9 +61,11 @@ struct is_comparable<
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/* For a vector/map data structure, recursively check the value type
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(which is std::pair for maps) */
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template <typename T>
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struct is_comparable<T, enable_if_t<container_traits<T>::is_vector>> {
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static constexpr const bool value = is_comparable<typename T::value_type>::value;
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};
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struct is_comparable<T, enable_if_t<container_traits<T>::is_vector>>
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: is_comparable<typename recursive_container_traits<T>::type_to_check_recursively> {};
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template <>
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struct is_comparable<recursive_bottom> : std::true_type {};
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/* For pairs, recursively check the two data types */
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template <typename T>
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@ -13,6 +13,8 @@
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#include "constructor_stats.h"
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#include "pybind11_tests.h"
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#include <type_traits>
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template <typename derived>
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struct empty {
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static const derived &get_one() { return instance_; }
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@ -293,3 +295,239 @@ TEST_SUBMODULE(copy_move_policies, m) {
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// Make sure that cast from pytype rvalue to other pytype works
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m.def("get_pytype_rvalue_castissue", [](double i) { return py::float_(i).cast<py::int_>(); });
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}
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/*
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* Rest of the file:
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* static_assert based tests for pybind11 adaptations of
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* std::is_move_constructible, std::is_copy_constructible and
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* std::is_copy_assignable (no adaptation of std::is_move_assignable).
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* Difference between pybind11 and std traits: pybind11 traits will also check
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* the contained value_types.
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*/
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struct NotMovable {
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NotMovable() = default;
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NotMovable(NotMovable const &) = default;
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NotMovable(NotMovable &&) = delete;
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NotMovable &operator=(NotMovable const &) = default;
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NotMovable &operator=(NotMovable &&) = delete;
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};
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static_assert(!std::is_move_constructible<NotMovable>::value,
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"!std::is_move_constructible<NotMovable>::value");
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static_assert(std::is_copy_constructible<NotMovable>::value,
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"std::is_copy_constructible<NotMovable>::value");
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static_assert(!pybind11::detail::is_move_constructible<NotMovable>::value,
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"!pybind11::detail::is_move_constructible<NotMovable>::value");
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static_assert(pybind11::detail::is_copy_constructible<NotMovable>::value,
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"pybind11::detail::is_copy_constructible<NotMovable>::value");
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static_assert(!std::is_move_assignable<NotMovable>::value,
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"!std::is_move_assignable<NotMovable>::value");
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static_assert(std::is_copy_assignable<NotMovable>::value,
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"std::is_copy_assignable<NotMovable>::value");
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// pybind11 does not have this
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// static_assert(!pybind11::detail::is_move_assignable<NotMovable>::value,
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// "!pybind11::detail::is_move_assignable<NotMovable>::value");
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static_assert(pybind11::detail::is_copy_assignable<NotMovable>::value,
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"pybind11::detail::is_copy_assignable<NotMovable>::value");
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struct NotCopyable {
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NotCopyable() = default;
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NotCopyable(NotCopyable const &) = delete;
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NotCopyable(NotCopyable &&) = default;
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NotCopyable &operator=(NotCopyable const &) = delete;
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NotCopyable &operator=(NotCopyable &&) = default;
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};
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static_assert(std::is_move_constructible<NotCopyable>::value,
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"std::is_move_constructible<NotCopyable>::value");
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static_assert(!std::is_copy_constructible<NotCopyable>::value,
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"!std::is_copy_constructible<NotCopyable>::value");
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static_assert(pybind11::detail::is_move_constructible<NotCopyable>::value,
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"pybind11::detail::is_move_constructible<NotCopyable>::value");
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static_assert(!pybind11::detail::is_copy_constructible<NotCopyable>::value,
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"!pybind11::detail::is_copy_constructible<NotCopyable>::value");
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static_assert(std::is_move_assignable<NotCopyable>::value,
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"std::is_move_assignable<NotCopyable>::value");
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static_assert(!std::is_copy_assignable<NotCopyable>::value,
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"!std::is_copy_assignable<NotCopyable>::value");
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// pybind11 does not have this
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// static_assert(!pybind11::detail::is_move_assignable<NotCopyable>::value,
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// "!pybind11::detail::is_move_assignable<NotCopyable>::value");
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static_assert(!pybind11::detail::is_copy_assignable<NotCopyable>::value,
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"!pybind11::detail::is_copy_assignable<NotCopyable>::value");
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struct NotCopyableNotMovable {
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NotCopyableNotMovable() = default;
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NotCopyableNotMovable(NotCopyableNotMovable const &) = delete;
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NotCopyableNotMovable(NotCopyableNotMovable &&) = delete;
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NotCopyableNotMovable &operator=(NotCopyableNotMovable const &) = delete;
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NotCopyableNotMovable &operator=(NotCopyableNotMovable &&) = delete;
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};
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static_assert(!std::is_move_constructible<NotCopyableNotMovable>::value,
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"!std::is_move_constructible<NotCopyableNotMovable>::value");
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static_assert(!std::is_copy_constructible<NotCopyableNotMovable>::value,
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"!std::is_copy_constructible<NotCopyableNotMovable>::value");
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static_assert(!pybind11::detail::is_move_constructible<NotCopyableNotMovable>::value,
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"!pybind11::detail::is_move_constructible<NotCopyableNotMovable>::value");
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static_assert(!pybind11::detail::is_copy_constructible<NotCopyableNotMovable>::value,
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"!pybind11::detail::is_copy_constructible<NotCopyableNotMovable>::value");
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static_assert(!std::is_move_assignable<NotCopyableNotMovable>::value,
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"!std::is_move_assignable<NotCopyableNotMovable>::value");
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static_assert(!std::is_copy_assignable<NotCopyableNotMovable>::value,
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"!std::is_copy_assignable<NotCopyableNotMovable>::value");
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// pybind11 does not have this
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// static_assert(!pybind11::detail::is_move_assignable<NotCopyableNotMovable>::value,
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// "!pybind11::detail::is_move_assignable<NotCopyableNotMovable>::value");
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static_assert(!pybind11::detail::is_copy_assignable<NotCopyableNotMovable>::value,
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"!pybind11::detail::is_copy_assignable<NotCopyableNotMovable>::value");
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struct NotMovableVector : std::vector<NotMovable> {};
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static_assert(std::is_move_constructible<NotMovableVector>::value,
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"std::is_move_constructible<NotMovableVector>::value");
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static_assert(std::is_copy_constructible<NotMovableVector>::value,
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"std::is_copy_constructible<NotMovableVector>::value");
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static_assert(!pybind11::detail::is_move_constructible<NotMovableVector>::value,
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"!pybind11::detail::is_move_constructible<NotMovableVector>::value");
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static_assert(pybind11::detail::is_copy_constructible<NotMovableVector>::value,
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"pybind11::detail::is_copy_constructible<NotMovableVector>::value");
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static_assert(std::is_move_assignable<NotMovableVector>::value,
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"std::is_move_assignable<NotMovableVector>::value");
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static_assert(std::is_copy_assignable<NotMovableVector>::value,
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"std::is_copy_assignable<NotMovableVector>::value");
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// pybind11 does not have this
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// static_assert(!pybind11::detail::is_move_assignable<NotMovableVector>::value,
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// "!pybind11::detail::is_move_assignable<NotMovableVector>::value");
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static_assert(pybind11::detail::is_copy_assignable<NotMovableVector>::value,
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"pybind11::detail::is_copy_assignable<NotMovableVector>::value");
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struct NotCopyableVector : std::vector<NotCopyable> {};
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static_assert(std::is_move_constructible<NotCopyableVector>::value,
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"std::is_move_constructible<NotCopyableVector>::value");
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static_assert(std::is_copy_constructible<NotCopyableVector>::value,
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"std::is_copy_constructible<NotCopyableVector>::value");
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static_assert(pybind11::detail::is_move_constructible<NotCopyableVector>::value,
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"pybind11::detail::is_move_constructible<NotCopyableVector>::value");
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static_assert(!pybind11::detail::is_copy_constructible<NotCopyableVector>::value,
|
||||
"!pybind11::detail::is_copy_constructible<NotCopyableVector>::value");
|
||||
static_assert(std::is_move_assignable<NotCopyableVector>::value,
|
||||
"std::is_move_assignable<NotCopyableVector>::value");
|
||||
static_assert(std::is_copy_assignable<NotCopyableVector>::value,
|
||||
"std::is_copy_assignable<NotCopyableVector>::value");
|
||||
// pybind11 does not have this
|
||||
// static_assert(!pybind11::detail::is_move_assignable<NotCopyableVector>::value,
|
||||
// "!pybind11::detail::is_move_assignable<NotCopyableVector>::value");
|
||||
static_assert(!pybind11::detail::is_copy_assignable<NotCopyableVector>::value,
|
||||
"!pybind11::detail::is_copy_assignable<NotCopyableVector>::value");
|
||||
|
||||
struct NotCopyableNotMovableVector : std::vector<NotCopyableNotMovable> {};
|
||||
static_assert(std::is_move_constructible<NotCopyableNotMovableVector>::value,
|
||||
"std::is_move_constructible<NotCopyableNotMovableVector>::value");
|
||||
static_assert(std::is_copy_constructible<NotCopyableNotMovableVector>::value,
|
||||
"std::is_copy_constructible<NotCopyableNotMovableVector>::value");
|
||||
static_assert(!pybind11::detail::is_move_constructible<NotCopyableNotMovableVector>::value,
|
||||
"!pybind11::detail::is_move_constructible<NotCopyableNotMovableVector>::value");
|
||||
static_assert(!pybind11::detail::is_copy_constructible<NotCopyableNotMovableVector>::value,
|
||||
"!pybind11::detail::is_copy_constructible<NotCopyableNotMovableVector>::value");
|
||||
static_assert(std::is_move_assignable<NotCopyableNotMovableVector>::value,
|
||||
"std::is_move_assignable<NotCopyableNotMovableVector>::value");
|
||||
static_assert(std::is_copy_assignable<NotCopyableNotMovableVector>::value,
|
||||
"std::is_copy_assignable<NotCopyableNotMovableVector>::value");
|
||||
// pybind11 does not have this
|
||||
// static_assert(!pybind11::detail::is_move_assignable<NotCopyableNotMovableVector>::value,
|
||||
// "!pybind11::detail::is_move_assignable<NotCopyableNotMovableVector>::value");
|
||||
static_assert(!pybind11::detail::is_copy_assignable<NotCopyableNotMovableVector>::value,
|
||||
"!pybind11::detail::is_copy_assignable<NotCopyableNotMovableVector>::value");
|
||||
|
||||
struct NotMovableMap : std::map<int, NotMovable> {};
|
||||
static_assert(std::is_move_constructible<NotMovableMap>::value,
|
||||
"std::is_move_constructible<NotMovableMap>::value");
|
||||
static_assert(std::is_copy_constructible<NotMovableMap>::value,
|
||||
"std::is_copy_constructible<NotMovableMap>::value");
|
||||
static_assert(!pybind11::detail::is_move_constructible<NotMovableMap>::value,
|
||||
"!pybind11::detail::is_move_constructible<NotMovableMap>::value");
|
||||
static_assert(pybind11::detail::is_copy_constructible<NotMovableMap>::value,
|
||||
"pybind11::detail::is_copy_constructible<NotMovableMap>::value");
|
||||
static_assert(std::is_move_assignable<NotMovableMap>::value,
|
||||
"std::is_move_assignable<NotMovableMap>::value");
|
||||
static_assert(std::is_copy_assignable<NotMovableMap>::value,
|
||||
"std::is_copy_assignable<NotMovableMap>::value");
|
||||
// pybind11 does not have this
|
||||
// static_assert(!pybind11::detail::is_move_assignable<NotMovableMap>::value,
|
||||
// "!pybind11::detail::is_move_assignable<NotMovableMap>::value");
|
||||
static_assert(pybind11::detail::is_copy_assignable<NotMovableMap>::value,
|
||||
"pybind11::detail::is_copy_assignable<NotMovableMap>::value");
|
||||
|
||||
struct NotCopyableMap : std::map<int, NotCopyable> {};
|
||||
static_assert(std::is_move_constructible<NotCopyableMap>::value,
|
||||
"std::is_move_constructible<NotCopyableMap>::value");
|
||||
static_assert(std::is_copy_constructible<NotCopyableMap>::value,
|
||||
"std::is_copy_constructible<NotCopyableMap>::value");
|
||||
static_assert(pybind11::detail::is_move_constructible<NotCopyableMap>::value,
|
||||
"pybind11::detail::is_move_constructible<NotCopyableMap>::value");
|
||||
static_assert(!pybind11::detail::is_copy_constructible<NotCopyableMap>::value,
|
||||
"!pybind11::detail::is_copy_constructible<NotCopyableMap>::value");
|
||||
static_assert(std::is_move_assignable<NotCopyableMap>::value,
|
||||
"std::is_move_assignable<NotCopyableMap>::value");
|
||||
static_assert(std::is_copy_assignable<NotCopyableMap>::value,
|
||||
"std::is_copy_assignable<NotCopyableMap>::value");
|
||||
// pybind11 does not have this
|
||||
// static_assert(!pybind11::detail::is_move_assignable<NotCopyableMap>::value,
|
||||
// "!pybind11::detail::is_move_assignable<NotCopyableMap>::value");
|
||||
static_assert(!pybind11::detail::is_copy_assignable<NotCopyableMap>::value,
|
||||
"!pybind11::detail::is_copy_assignable<NotCopyableMap>::value");
|
||||
|
||||
struct NotCopyableNotMovableMap : std::map<int, NotCopyableNotMovable> {};
|
||||
static_assert(std::is_move_constructible<NotCopyableNotMovableMap>::value,
|
||||
"std::is_move_constructible<NotCopyableNotMovableMap>::value");
|
||||
static_assert(std::is_copy_constructible<NotCopyableNotMovableMap>::value,
|
||||
"std::is_copy_constructible<NotCopyableNotMovableMap>::value");
|
||||
static_assert(!pybind11::detail::is_move_constructible<NotCopyableNotMovableMap>::value,
|
||||
"!pybind11::detail::is_move_constructible<NotCopyableNotMovableMap>::value");
|
||||
static_assert(!pybind11::detail::is_copy_constructible<NotCopyableNotMovableMap>::value,
|
||||
"!pybind11::detail::is_copy_constructible<NotCopyableNotMovableMap>::value");
|
||||
static_assert(std::is_move_assignable<NotCopyableNotMovableMap>::value,
|
||||
"std::is_move_assignable<NotCopyableNotMovableMap>::value");
|
||||
static_assert(std::is_copy_assignable<NotCopyableNotMovableMap>::value,
|
||||
"std::is_copy_assignable<NotCopyableNotMovableMap>::value");
|
||||
// pybind11 does not have this
|
||||
// static_assert(!pybind11::detail::is_move_assignable<NotCopyableNotMovableMap>::value,
|
||||
// "!pybind11::detail::is_move_assignable<NotCopyableNotMovableMap>::value");
|
||||
static_assert(!pybind11::detail::is_copy_assignable<NotCopyableNotMovableMap>::value,
|
||||
"!pybind11::detail::is_copy_assignable<NotCopyableNotMovableMap>::value");
|
||||
|
||||
struct RecursiveVector : std::vector<RecursiveVector> {};
|
||||
static_assert(std::is_move_constructible<RecursiveVector>::value,
|
||||
"std::is_move_constructible<RecursiveVector>::value");
|
||||
static_assert(std::is_copy_constructible<RecursiveVector>::value,
|
||||
"std::is_copy_constructible<RecursiveVector>::value");
|
||||
static_assert(pybind11::detail::is_move_constructible<RecursiveVector>::value,
|
||||
"pybind11::detail::is_move_constructible<RecursiveVector>::value");
|
||||
static_assert(pybind11::detail::is_copy_constructible<RecursiveVector>::value,
|
||||
"pybind11::detail::is_copy_constructible<RecursiveVector>::value");
|
||||
static_assert(std::is_move_assignable<RecursiveVector>::value,
|
||||
"std::is_move_assignable<RecursiveVector>::value");
|
||||
static_assert(std::is_copy_assignable<RecursiveVector>::value,
|
||||
"std::is_copy_assignable<RecursiveVector>::value");
|
||||
// pybind11 does not have this
|
||||
// static_assert(!pybind11::detail::is_move_assignable<RecursiveVector>::value,
|
||||
// "!pybind11::detail::is_move_assignable<RecursiveVector>::value");
|
||||
static_assert(pybind11::detail::is_copy_assignable<RecursiveVector>::value,
|
||||
"pybind11::detail::is_copy_assignable<RecursiveVector>::value");
|
||||
|
||||
struct RecursiveMap : std::map<int, RecursiveMap> {};
|
||||
static_assert(std::is_move_constructible<RecursiveMap>::value,
|
||||
"std::is_move_constructible<RecursiveMap>::value");
|
||||
static_assert(std::is_copy_constructible<RecursiveMap>::value,
|
||||
"std::is_copy_constructible<RecursiveMap>::value");
|
||||
static_assert(pybind11::detail::is_move_constructible<RecursiveMap>::value,
|
||||
"pybind11::detail::is_move_constructible<RecursiveMap>::value");
|
||||
static_assert(pybind11::detail::is_copy_constructible<RecursiveMap>::value,
|
||||
"pybind11::detail::is_copy_constructible<RecursiveMap>::value");
|
||||
static_assert(std::is_move_assignable<RecursiveMap>::value,
|
||||
"std::is_move_assignable<RecursiveMap>::value");
|
||||
static_assert(std::is_copy_assignable<RecursiveMap>::value,
|
||||
"std::is_copy_assignable<RecursiveMap>::value");
|
||||
// pybind11 does not have this
|
||||
// static_assert(!pybind11::detail::is_move_assignable<RecursiveMap>::value,
|
||||
// "!pybind11::detail::is_move_assignable<RecursiveMap>::value");
|
||||
static_assert(pybind11::detail::is_copy_assignable<RecursiveMap>::value,
|
||||
"pybind11::detail::is_copy_assignable<RecursiveMap>::value");
|
||||
|
||||
@ -70,6 +70,44 @@ NestMap *times_hundred(int n) {
|
||||
return m;
|
||||
}
|
||||
|
||||
/*
|
||||
* Recursive data structures as test for issue #4623
|
||||
*/
|
||||
struct RecursiveVector : std::vector<RecursiveVector> {
|
||||
using Parent = std::vector<RecursiveVector>;
|
||||
using Parent::Parent;
|
||||
};
|
||||
|
||||
struct RecursiveMap : std::map<int, RecursiveMap> {
|
||||
using Parent = std::map<int, RecursiveMap>;
|
||||
using Parent::Parent;
|
||||
};
|
||||
|
||||
/*
|
||||
* Pybind11 does not catch more complicated recursion schemes, such as mutual
|
||||
* recursion.
|
||||
* In that case custom recursive_container_traits specializations need to be added,
|
||||
* thus manually telling pybind11 about the recursion.
|
||||
*/
|
||||
struct MutuallyRecursiveContainerPairMV;
|
||||
struct MutuallyRecursiveContainerPairVM;
|
||||
|
||||
struct MutuallyRecursiveContainerPairMV : std::map<int, MutuallyRecursiveContainerPairVM> {};
|
||||
struct MutuallyRecursiveContainerPairVM : std::vector<MutuallyRecursiveContainerPairMV> {};
|
||||
|
||||
namespace pybind11 {
|
||||
namespace detail {
|
||||
template <typename SFINAE>
|
||||
struct recursive_container_traits<MutuallyRecursiveContainerPairMV, SFINAE> {
|
||||
using type_to_check_recursively = recursive_bottom;
|
||||
};
|
||||
template <typename SFINAE>
|
||||
struct recursive_container_traits<MutuallyRecursiveContainerPairVM, SFINAE> {
|
||||
using type_to_check_recursively = recursive_bottom;
|
||||
};
|
||||
} // namespace detail
|
||||
} // namespace pybind11
|
||||
|
||||
TEST_SUBMODULE(stl_binders, m) {
|
||||
// test_vector_int
|
||||
py::bind_vector<std::vector<unsigned int>>(m, "VectorInt", py::buffer_protocol());
|
||||
@ -129,6 +167,12 @@ TEST_SUBMODULE(stl_binders, m) {
|
||||
m, "VectorUndeclStruct", py::buffer_protocol());
|
||||
});
|
||||
|
||||
// Bind recursive container types
|
||||
py::bind_vector<RecursiveVector>(m, "RecursiveVector");
|
||||
py::bind_map<RecursiveMap>(m, "RecursiveMap");
|
||||
py::bind_map<MutuallyRecursiveContainerPairMV>(m, "MutuallyRecursiveContainerPairMV");
|
||||
py::bind_vector<MutuallyRecursiveContainerPairVM>(m, "MutuallyRecursiveContainerPairVM");
|
||||
|
||||
// The rest depends on numpy:
|
||||
try {
|
||||
py::module_::import("numpy");
|
||||
|
||||
@ -335,3 +335,21 @@ def test_map_view_types():
|
||||
assert type(unordered_map_string_double.items()) is items_type
|
||||
assert type(map_string_double_const.items()) is items_type
|
||||
assert type(unordered_map_string_double_const.items()) is items_type
|
||||
|
||||
|
||||
def test_recursive_vector():
|
||||
recursive_vector = m.RecursiveVector()
|
||||
recursive_vector.append(m.RecursiveVector())
|
||||
recursive_vector[0].append(m.RecursiveVector())
|
||||
recursive_vector[0].append(m.RecursiveVector())
|
||||
# Can't use len() since test_stl_binders.cpp does not include stl.h,
|
||||
# so the necessary conversion is missing
|
||||
assert recursive_vector[0].count(m.RecursiveVector()) == 2
|
||||
|
||||
|
||||
def test_recursive_map():
|
||||
recursive_map = m.RecursiveMap()
|
||||
recursive_map[100] = m.RecursiveMap()
|
||||
recursive_map[100][101] = m.RecursiveMap()
|
||||
recursive_map[100][102] = m.RecursiveMap()
|
||||
assert list(recursive_map[100].keys()) == [101, 102]
|
||||
|
||||
Loading…
Reference in New Issue
Block a user