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Resolve empty statement warning when using PYBIND11_OVERLOAD_PURE_NAME and PYBIND11_OVERLOAD_PURE (#2325)
* Wrap PYBIND11_OVERLOAD_NAME and PYBIND11_OVERLOAD_PURE_NAME in do { ... } while (false), and resolve trailing semicolon
* Deprecate PYBIND11_OVERLOAD_* and get_overload in favor of PYBIND11_OVERRIDE_* and get_override
* Correct erroneous usage of 'overload' instead of 'override' in the implementation and internals
* Fix tests to use non-deprecated PYBIND11_OVERRIDE_* macros
* Update docs to use override instead of overload where appropriate, and add warning about deprecated aliases
* Add semicolons to deprecated PYBIND11_OVERLOAD macros to match original behavior
* Remove deprecation of PYBIND11_OVERLOAD_* macros and get_overload
* Add note to changelog and upgrade guide
This commit is contained in:
Yannick Jadoul
GitHub
parent
9df13835c8
commit
d65e34d61d
@ -29,9 +29,9 @@ The following Python snippet demonstrates the intended usage from the Python sid
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from example import print
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print(A())
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To register the necessary conversion routines, it is necessary to add
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a partial overload to the ``pybind11::detail::type_caster<T>`` template.
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Although this is an implementation detail, adding partial overloads to this
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To register the necessary conversion routines, it is necessary to add an
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instantiation of the ``pybind11::detail::type_caster<T>`` template.
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Although this is an implementation detail, adding an instantiation of this
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type is explicitly allowed.
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.. code-block:: cpp
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@ -157,7 +157,7 @@ the declaration
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before any binding code (e.g. invocations to ``class_::def()``, etc.). This
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macro must be specified at the top level (and outside of any namespaces), since
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it instantiates a partial template overload. If your binding code consists of
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it adds a template instantiation of ``type_caster``. If your binding code consists of
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multiple compilation units, it must be present in every file (typically via a
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common header) preceding any usage of ``std::vector<int>``. Opaque types must
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also have a corresponding ``class_`` declaration to associate them with a name
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@ -71,7 +71,7 @@ helper class that is defined as follows:
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/* Trampoline (need one for each virtual function) */
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std::string go(int n_times) override {
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PYBIND11_OVERLOAD_PURE(
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PYBIND11_OVERRIDE_PURE(
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std::string, /* Return type */
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Animal, /* Parent class */
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go, /* Name of function in C++ (must match Python name) */
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@ -80,10 +80,10 @@ helper class that is defined as follows:
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}
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};
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The macro :c:macro:`PYBIND11_OVERLOAD_PURE` should be used for pure virtual
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functions, and :c:macro:`PYBIND11_OVERLOAD` should be used for functions which have
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The macro :c:macro:`PYBIND11_OVERRIDE_PURE` should be used for pure virtual
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functions, and :c:macro:`PYBIND11_OVERRIDE` should be used for functions which have
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a default implementation. There are also two alternate macros
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:c:macro:`PYBIND11_OVERLOAD_PURE_NAME` and :c:macro:`PYBIND11_OVERLOAD_NAME` which
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:c:macro:`PYBIND11_OVERRIDE_PURE_NAME` and :c:macro:`PYBIND11_OVERRIDE_NAME` which
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take a string-valued name argument between the *Parent class* and *Name of the
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function* slots, which defines the name of function in Python. This is required
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when the C++ and Python versions of the
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@ -122,7 +122,7 @@ Bindings should be made against the actual class, not the trampoline helper clas
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Note, however, that the above is sufficient for allowing python classes to
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extend ``Animal``, but not ``Dog``: see :ref:`virtual_and_inheritance` for the
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necessary steps required to providing proper overload support for inherited
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necessary steps required to providing proper overriding support for inherited
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classes.
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The Python session below shows how to override ``Animal::go`` and invoke it via
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@ -181,15 +181,24 @@ Please take a look at the :ref:`macro_notes` before using this feature.
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- because in these cases there is no C++ variable to reference (the value
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is stored in the referenced Python variable), pybind11 provides one in
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the PYBIND11_OVERLOAD macros (when needed) with static storage duration.
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Note that this means that invoking the overloaded method on *any*
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the PYBIND11_OVERRIDE macros (when needed) with static storage duration.
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Note that this means that invoking the overridden method on *any*
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instance will change the referenced value stored in *all* instances of
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that type.
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- Attempts to modify a non-const reference will not have the desired
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effect: it will change only the static cache variable, but this change
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will not propagate to underlying Python instance, and the change will be
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replaced the next time the overload is invoked.
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replaced the next time the override is invoked.
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.. warning::
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The :c:macro:`PYBIND11_OVERRIDE` and accompanying macros used to be called
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``PYBIND11_OVERLOAD`` up until pybind11 v2.5.0, and :func:`get_override`
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used to be called ``get_overload``. This naming was corrected and the older
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macro and function names have been deprecated, in order to reduce confusion
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with overloaded functions and methods and ``py::overload_cast`` (see
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:ref:`classes`).
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.. seealso::
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@ -237,20 +246,20 @@ override the ``name()`` method):
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class PyAnimal : public Animal {
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public:
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using Animal::Animal; // Inherit constructors
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std::string go(int n_times) override { PYBIND11_OVERLOAD_PURE(std::string, Animal, go, n_times); }
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std::string name() override { PYBIND11_OVERLOAD(std::string, Animal, name, ); }
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std::string go(int n_times) override { PYBIND11_OVERRIDE_PURE(std::string, Animal, go, n_times); }
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std::string name() override { PYBIND11_OVERRIDE(std::string, Animal, name, ); }
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};
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class PyDog : public Dog {
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public:
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using Dog::Dog; // Inherit constructors
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std::string go(int n_times) override { PYBIND11_OVERLOAD(std::string, Dog, go, n_times); }
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std::string name() override { PYBIND11_OVERLOAD(std::string, Dog, name, ); }
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std::string bark() override { PYBIND11_OVERLOAD(std::string, Dog, bark, ); }
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std::string go(int n_times) override { PYBIND11_OVERRIDE(std::string, Dog, go, n_times); }
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std::string name() override { PYBIND11_OVERRIDE(std::string, Dog, name, ); }
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std::string bark() override { PYBIND11_OVERRIDE(std::string, Dog, bark, ); }
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};
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.. note::
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Note the trailing commas in the ``PYBIND11_OVERLOAD`` calls to ``name()``
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Note the trailing commas in the ``PYBIND11_OVERIDE`` calls to ``name()``
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and ``bark()``. These are needed to portably implement a trampoline for a
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function that does not take any arguments. For functions that take
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a nonzero number of arguments, the trailing comma must be omitted.
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@ -265,9 +274,9 @@ declare or override any virtual methods itself:
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class PyHusky : public Husky {
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public:
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using Husky::Husky; // Inherit constructors
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std::string go(int n_times) override { PYBIND11_OVERLOAD_PURE(std::string, Husky, go, n_times); }
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std::string name() override { PYBIND11_OVERLOAD(std::string, Husky, name, ); }
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std::string bark() override { PYBIND11_OVERLOAD(std::string, Husky, bark, ); }
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std::string go(int n_times) override { PYBIND11_OVERRIDE_PURE(std::string, Husky, go, n_times); }
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std::string name() override { PYBIND11_OVERRIDE(std::string, Husky, name, ); }
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std::string bark() override { PYBIND11_OVERRIDE(std::string, Husky, bark, ); }
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};
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There is, however, a technique that can be used to avoid this duplication
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@ -280,15 +289,15 @@ follows:
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template <class AnimalBase = Animal> class PyAnimal : public AnimalBase {
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public:
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using AnimalBase::AnimalBase; // Inherit constructors
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std::string go(int n_times) override { PYBIND11_OVERLOAD_PURE(std::string, AnimalBase, go, n_times); }
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std::string name() override { PYBIND11_OVERLOAD(std::string, AnimalBase, name, ); }
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std::string go(int n_times) override { PYBIND11_OVERRIDE_PURE(std::string, AnimalBase, go, n_times); }
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std::string name() override { PYBIND11_OVERRIDE(std::string, AnimalBase, name, ); }
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};
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template <class DogBase = Dog> class PyDog : public PyAnimal<DogBase> {
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public:
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using PyAnimal<DogBase>::PyAnimal; // Inherit constructors
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// Override PyAnimal's pure virtual go() with a non-pure one:
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std::string go(int n_times) override { PYBIND11_OVERLOAD(std::string, DogBase, go, n_times); }
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std::string bark() override { PYBIND11_OVERLOAD(std::string, DogBase, bark, ); }
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std::string go(int n_times) override { PYBIND11_OVERRIDE(std::string, DogBase, go, n_times); }
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std::string bark() override { PYBIND11_OVERRIDE(std::string, DogBase, bark, ); }
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};
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This technique has the advantage of requiring just one trampoline method to be
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@ -341,7 +350,7 @@ valid for the trampoline class but not the registered class. This is primarily
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for performance reasons: when the trampoline class is not needed for anything
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except virtual method dispatching, not initializing the trampoline class
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improves performance by avoiding needing to do a run-time check to see if the
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inheriting python instance has an overloaded method.
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inheriting python instance has an overridden method.
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Sometimes, however, it is useful to always initialize a trampoline class as an
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intermediate class that does more than just handle virtual method dispatching.
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@ -372,7 +381,7 @@ references (See also :ref:`faq_reference_arguments`). Another way of solving
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this is to use the method body of the trampoline class to do conversions to the
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input and return of the Python method.
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The main building block to do so is the :func:`get_overload`, this function
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The main building block to do so is the :func:`get_override`, this function
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allows retrieving a method implemented in Python from within the trampoline's
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methods. Consider for example a C++ method which has the signature
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``bool myMethod(int32_t& value)``, where the return indicates whether
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@ -384,10 +393,10 @@ Python side by allowing the Python function to return ``None`` or an ``int``:
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bool MyClass::myMethod(int32_t& value)
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{
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pybind11::gil_scoped_acquire gil; // Acquire the GIL while in this scope.
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// Try to look up the overloaded method on the Python side.
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pybind11::function overload = pybind11::get_overload(this, "myMethod");
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if (overload) { // method is found
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auto obj = overload(value); // Call the Python function.
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// Try to look up the overridden method on the Python side.
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pybind11::function override = pybind11::get_override(this, "myMethod");
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if (override) { // method is found
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auto obj = override(value); // Call the Python function.
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if (py::isinstance<py::int_>(obj)) { // check if it returned a Python integer type
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value = obj.cast<int32_t>(); // Cast it and assign it to the value.
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return true; // Return true; value should be used.
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@ -1104,7 +1113,7 @@ described trampoline:
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class Trampoline : public A {
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public:
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int foo() const override { PYBIND11_OVERLOAD(int, A, foo, ); }
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int foo() const override { PYBIND11_OVERRIDE(int, A, foo, ); }
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};
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class Publicist : public A {
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@ -7,14 +7,14 @@ General notes regarding convenience macros
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==========================================
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pybind11 provides a few convenience macros such as
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:func:`PYBIND11_DECLARE_HOLDER_TYPE` and ``PYBIND11_OVERLOAD_*``. Since these
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:func:`PYBIND11_DECLARE_HOLDER_TYPE` and ``PYBIND11_OVERRIDE_*``. Since these
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are "just" macros that are evaluated in the preprocessor (which has no concept
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of types), they *will* get confused by commas in a template argument; for
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example, consider:
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.. code-block:: cpp
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PYBIND11_OVERLOAD(MyReturnType<T1, T2>, Class<T3, T4>, func)
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PYBIND11_OVERRIDE(MyReturnType<T1, T2>, Class<T3, T4>, func)
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The limitation of the C preprocessor interprets this as five arguments (with new
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arguments beginning after each comma) rather than three. To get around this,
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@ -26,10 +26,10 @@ using the ``PYBIND11_TYPE`` macro:
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// Version 1: using a type alias
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using ReturnType = MyReturnType<T1, T2>;
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using ClassType = Class<T3, T4>;
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PYBIND11_OVERLOAD(ReturnType, ClassType, func);
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PYBIND11_OVERRIDE(ReturnType, ClassType, func);
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// Version 2: using the PYBIND11_TYPE macro:
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PYBIND11_OVERLOAD(PYBIND11_TYPE(MyReturnType<T1, T2>),
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PYBIND11_OVERRIDE(PYBIND11_TYPE(MyReturnType<T1, T2>),
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PYBIND11_TYPE(Class<T3, T4>), func)
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The ``PYBIND11_MAKE_OPAQUE`` macro does *not* require the above workarounds.
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@ -59,7 +59,7 @@ could be realized as follows (important changes highlighted):
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/* Acquire GIL before calling Python code */
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py::gil_scoped_acquire acquire;
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PYBIND11_OVERLOAD_PURE(
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PYBIND11_OVERRIDE_PURE(
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std::string, /* Return type */
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Animal, /* Parent class */
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go, /* Name of function */
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@ -62,6 +62,12 @@ See :ref:`upgrade-guide-2.6` for help upgrading to the new version.
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`#2265 <https://github.com/pybind/pybind11/pull/2265>`_ and
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`#2346 <https://github.com/pybind/pybind11/pull/2346>`_
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* ``PYBIND11_OVERLOAD*`` macros and ``get_overload`` function replaced by
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correctly-named ``PYBIND11_OVERRIDE*`` and ``get_override``, fixing
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inconsistencies in the presene of a closing ``;`` in these macros.
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``get_type_overload`` is deprecated.
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`#2325 <https://github.com/pybind/pybind11/pull/2325>`_
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Smaller or developer focused features:
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* Error now thrown when ``__init__`` is forgotten on subclasses.
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@ -91,15 +91,15 @@ Inheritance
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See :doc:`/classes` and :doc:`/advanced/classes` for more detail.
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.. doxygendefine:: PYBIND11_OVERLOAD
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.. doxygendefine:: PYBIND11_OVERRIDE
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.. doxygendefine:: PYBIND11_OVERLOAD_PURE
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.. doxygendefine:: PYBIND11_OVERRIDE_PURE
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.. doxygendefine:: PYBIND11_OVERLOAD_NAME
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.. doxygendefine:: PYBIND11_OVERRIDE_NAME
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.. doxygendefine:: PYBIND11_OVERLOAD_PURE_NAME
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.. doxygendefine:: PYBIND11_OVERRIDE_PURE_NAME
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.. doxygenfunction:: get_overload
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.. doxygenfunction:: get_override
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Exceptions
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==========
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@ -21,6 +21,10 @@ If ``__eq__`` defined but not ``__hash__``, ``__hash__`` is now set to
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``None``, as in normal CPython. You should add ``__hash__`` if you intended the
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class to be hashable, possibly using the new ``py::hash`` shortcut.
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Usage of the ``PYBIND11_OVERLOAD*`` macros and ``get_overload`` function should
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be replaced by ``PYBIND11_OVERRIDE*`` and ``get_override``. In the future, the
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old macros may be deprecated and removed.
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CMake support:
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--------------
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@ -1797,16 +1797,16 @@ PYBIND11_NAMESPACE_BEGIN(detail)
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template <typename T, enable_if_t<!is_pyobject<T>::value, int>>
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object object_or_cast(T &&o) { return pybind11::cast(std::forward<T>(o)); }
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struct overload_unused {}; // Placeholder type for the unneeded (and dead code) static variable in the OVERLOAD_INT macro
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template <typename ret_type> using overload_caster_t = conditional_t<
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cast_is_temporary_value_reference<ret_type>::value, make_caster<ret_type>, overload_unused>;
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struct override_unused {}; // Placeholder type for the unneeded (and dead code) static variable in the PYBIND11_OVERRIDE_OVERRIDE macro
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template <typename ret_type> using override_caster_t = conditional_t<
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cast_is_temporary_value_reference<ret_type>::value, make_caster<ret_type>, override_unused>;
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// Trampoline use: for reference/pointer types to value-converted values, we do a value cast, then
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// store the result in the given variable. For other types, this is a no-op.
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template <typename T> enable_if_t<cast_is_temporary_value_reference<T>::value, T> cast_ref(object &&o, make_caster<T> &caster) {
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return cast_op<T>(load_type(caster, o));
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}
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template <typename T> enable_if_t<!cast_is_temporary_value_reference<T>::value, T> cast_ref(object &&, overload_unused &) {
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template <typename T> enable_if_t<!cast_is_temporary_value_reference<T>::value, T> cast_ref(object &&, override_unused &) {
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pybind11_fail("Internal error: cast_ref fallback invoked"); }
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// Trampoline use: Having a pybind11::cast with an invalid reference type is going to static_assert, even
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@ -2222,7 +2222,7 @@ type type::of() {
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}}
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/// Lets you pass a type containing a `,` through a macro parameter without needing a separate
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/// typedef, e.g.: `PYBIND11_OVERLOAD(PYBIND11_TYPE(ReturnType<A, B>), PYBIND11_TYPE(Parent<C, D>), f, arg)`
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/// typedef, e.g.: `PYBIND11_OVERRIDE(PYBIND11_TYPE(ReturnType<A, B>), PYBIND11_TYPE(Parent<C, D>), f, arg)`
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#define PYBIND11_TYPE(...) __VA_ARGS__
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PYBIND11_NAMESPACE_END(PYBIND11_NAMESPACE)
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@ -82,7 +82,7 @@ struct type_equal_to {
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template <typename value_type>
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using type_map = std::unordered_map<std::type_index, value_type, type_hash, type_equal_to>;
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struct overload_hash {
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struct override_hash {
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inline size_t operator()(const std::pair<const PyObject *, const char *>& v) const {
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size_t value = std::hash<const void *>()(v.first);
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value ^= std::hash<const void *>()(v.second) + 0x9e3779b9 + (value<<6) + (value>>2);
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@ -97,7 +97,7 @@ struct internals {
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type_map<type_info *> registered_types_cpp; // std::type_index -> pybind11's type information
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std::unordered_map<PyTypeObject *, std::vector<type_info *>> registered_types_py; // PyTypeObject* -> base type_info(s)
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std::unordered_multimap<const void *, instance*> registered_instances; // void * -> instance*
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std::unordered_set<std::pair<const PyObject *, const char *>, overload_hash> inactive_overload_cache;
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std::unordered_set<std::pair<const PyObject *, const char *>, override_hash> inactive_override_cache;
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type_map<std::vector<bool (*)(PyObject *, void *&)>> direct_conversions;
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std::unordered_map<const PyObject *, std::vector<PyObject *>> patients;
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std::forward_list<void (*) (std::exception_ptr)> registered_exception_translators;
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@ -2110,21 +2110,22 @@ error_already_set::~error_already_set() {
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}
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}
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inline function get_type_overload(const void *this_ptr, const detail::type_info *this_type, const char *name) {
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handle self = detail::get_object_handle(this_ptr, this_type);
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PYBIND11_NAMESPACE_BEGIN(detail)
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inline function get_type_override(const void *this_ptr, const type_info *this_type, const char *name) {
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handle self = get_object_handle(this_ptr, this_type);
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if (!self)
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return function();
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handle type = self.get_type();
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auto key = std::make_pair(type.ptr(), name);
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/* Cache functions that aren't overloaded in Python to avoid
|
||||
/* Cache functions that aren't overridden in Python to avoid
|
||||
many costly Python dictionary lookups below */
|
||||
auto &cache = detail::get_internals().inactive_overload_cache;
|
||||
auto &cache = get_internals().inactive_override_cache;
|
||||
if (cache.find(key) != cache.end())
|
||||
return function();
|
||||
|
||||
function overload = getattr(self, name, function());
|
||||
if (overload.is_cpp_function()) {
|
||||
function override = getattr(self, name, function());
|
||||
if (override.is_cpp_function()) {
|
||||
cache.insert(key);
|
||||
return function();
|
||||
}
|
||||
@ -2164,34 +2165,36 @@ inline function get_type_overload(const void *this_ptr, const detail::type_info
|
||||
Py_DECREF(result);
|
||||
#endif
|
||||
|
||||
return overload;
|
||||
return override;
|
||||
}
|
||||
PYBIND11_NAMESPACE_END(detail)
|
||||
|
||||
/** \rst
|
||||
Try to retrieve a python method by the provided name from the instance pointed to by the this_ptr.
|
||||
|
||||
:this_ptr: The pointer to the object the overload should be retrieved for. This should be the first
|
||||
non-trampoline class encountered in the inheritance chain.
|
||||
:name: The name of the overloaded Python method to retrieve.
|
||||
:this_ptr: The pointer to the object the overriden method should be retrieved for. This should be
|
||||
the first non-trampoline class encountered in the inheritance chain.
|
||||
:name: The name of the overridden Python method to retrieve.
|
||||
:return: The Python method by this name from the object or an empty function wrapper.
|
||||
\endrst */
|
||||
template <class T> function get_overload(const T *this_ptr, const char *name) {
|
||||
template <class T> function get_override(const T *this_ptr, const char *name) {
|
||||
auto tinfo = detail::get_type_info(typeid(T));
|
||||
return tinfo ? get_type_overload(this_ptr, tinfo, name) : function();
|
||||
return tinfo ? detail::get_type_override(this_ptr, tinfo, name) : function();
|
||||
}
|
||||
|
||||
#define PYBIND11_OVERLOAD_INT(ret_type, cname, name, ...) { \
|
||||
#define PYBIND11_OVERRIDE_IMPL(ret_type, cname, name, ...) \
|
||||
do { \
|
||||
pybind11::gil_scoped_acquire gil; \
|
||||
pybind11::function overload = pybind11::get_overload(static_cast<const cname *>(this), name); \
|
||||
if (overload) { \
|
||||
auto o = overload(__VA_ARGS__); \
|
||||
pybind11::function override = pybind11::get_override(static_cast<const cname *>(this), name); \
|
||||
if (override) { \
|
||||
auto o = override(__VA_ARGS__); \
|
||||
if (pybind11::detail::cast_is_temporary_value_reference<ret_type>::value) { \
|
||||
static pybind11::detail::overload_caster_t<ret_type> caster; \
|
||||
static pybind11::detail::override_caster_t<ret_type> caster; \
|
||||
return pybind11::detail::cast_ref<ret_type>(std::move(o), caster); \
|
||||
} \
|
||||
else return pybind11::detail::cast_safe<ret_type>(std::move(o)); \
|
||||
} \
|
||||
}
|
||||
} while (false)
|
||||
|
||||
/** \rst
|
||||
Macro to populate the virtual method in the trampoline class. This macro tries to look up a method named 'fn'
|
||||
@ -2202,7 +2205,7 @@ template <class T> function get_overload(const T *this_ptr, const char *name) {
|
||||
.. code-block:: cpp
|
||||
|
||||
std::string toString() override {
|
||||
PYBIND11_OVERLOAD_NAME(
|
||||
PYBIND11_OVERRIDE_NAME(
|
||||
std::string, // Return type (ret_type)
|
||||
Animal, // Parent class (cname)
|
||||
"__str__", // Name of method in Python (name)
|
||||
@ -2210,17 +2213,21 @@ template <class T> function get_overload(const T *this_ptr, const char *name) {
|
||||
);
|
||||
}
|
||||
\endrst */
|
||||
#define PYBIND11_OVERLOAD_NAME(ret_type, cname, name, fn, ...) \
|
||||
PYBIND11_OVERLOAD_INT(PYBIND11_TYPE(ret_type), PYBIND11_TYPE(cname), name, __VA_ARGS__) \
|
||||
return cname::fn(__VA_ARGS__)
|
||||
#define PYBIND11_OVERRIDE_NAME(ret_type, cname, name, fn, ...) \
|
||||
do { \
|
||||
PYBIND11_OVERRIDE_IMPL(PYBIND11_TYPE(ret_type), PYBIND11_TYPE(cname), name, __VA_ARGS__); \
|
||||
return cname::fn(__VA_ARGS__); \
|
||||
} while (false)
|
||||
|
||||
/** \rst
|
||||
Macro for pure virtual functions, this function is identical to :c:macro:`PYBIND11_OVERLOAD_NAME`, except that it
|
||||
throws if no overload can be found.
|
||||
Macro for pure virtual functions, this function is identical to :c:macro:`PYBIND11_OVERRIDE_NAME`, except that it
|
||||
throws if no override can be found.
|
||||
\endrst */
|
||||
#define PYBIND11_OVERLOAD_PURE_NAME(ret_type, cname, name, fn, ...) \
|
||||
PYBIND11_OVERLOAD_INT(PYBIND11_TYPE(ret_type), PYBIND11_TYPE(cname), name, __VA_ARGS__) \
|
||||
pybind11::pybind11_fail("Tried to call pure virtual function \"" PYBIND11_STRINGIFY(cname) "::" name "\"");
|
||||
#define PYBIND11_OVERRIDE_PURE_NAME(ret_type, cname, name, fn, ...) \
|
||||
do { \
|
||||
PYBIND11_OVERRIDE_IMPL(PYBIND11_TYPE(ret_type), PYBIND11_TYPE(cname), name, __VA_ARGS__); \
|
||||
pybind11::pybind11_fail("Tried to call pure virtual function \"" PYBIND11_STRINGIFY(cname) "::" name "\""); \
|
||||
} while (false)
|
||||
|
||||
/** \rst
|
||||
Macro to populate the virtual method in the trampoline class. This macro tries to look up the method
|
||||
@ -2237,7 +2244,7 @@ template <class T> function get_overload(const T *this_ptr, const char *name) {
|
||||
|
||||
// Trampoline (need one for each virtual function)
|
||||
std::string go(int n_times) override {
|
||||
PYBIND11_OVERLOAD_PURE(
|
||||
PYBIND11_OVERRIDE_PURE(
|
||||
std::string, // Return type (ret_type)
|
||||
Animal, // Parent class (cname)
|
||||
go, // Name of function in C++ (must match Python name) (fn)
|
||||
@ -2246,15 +2253,39 @@ template <class T> function get_overload(const T *this_ptr, const char *name) {
|
||||
}
|
||||
};
|
||||
\endrst */
|
||||
#define PYBIND11_OVERLOAD(ret_type, cname, fn, ...) \
|
||||
PYBIND11_OVERLOAD_NAME(PYBIND11_TYPE(ret_type), PYBIND11_TYPE(cname), #fn, fn, __VA_ARGS__)
|
||||
#define PYBIND11_OVERRIDE(ret_type, cname, fn, ...) \
|
||||
PYBIND11_OVERRIDE_NAME(PYBIND11_TYPE(ret_type), PYBIND11_TYPE(cname), #fn, fn, __VA_ARGS__)
|
||||
|
||||
/** \rst
|
||||
Macro for pure virtual functions, this function is identical to :c:macro:`PYBIND11_OVERLOAD`, except that it throws
|
||||
if no overload can be found.
|
||||
Macro for pure virtual functions, this function is identical to :c:macro:`PYBIND11_OVERRIDE`, except that it throws
|
||||
if no override can be found.
|
||||
\endrst */
|
||||
#define PYBIND11_OVERRIDE_PURE(ret_type, cname, fn, ...) \
|
||||
PYBIND11_OVERRIDE_PURE_NAME(PYBIND11_TYPE(ret_type), PYBIND11_TYPE(cname), #fn, fn, __VA_ARGS__)
|
||||
|
||||
|
||||
// Deprecated versions
|
||||
|
||||
PYBIND11_DEPRECATED("get_type_overload has been deprecated")
|
||||
inline function get_type_overload(const void *this_ptr, const detail::type_info *this_type, const char *name) {
|
||||
return detail::get_type_override(this_ptr, this_type, name);
|
||||
}
|
||||
|
||||
template <class T>
|
||||
inline function get_overload(const T *this_ptr, const char *name) {
|
||||
return get_override(this_ptr, name);
|
||||
}
|
||||
|
||||
#define PYBIND11_OVERLOAD_INT(ret_type, cname, name, ...) \
|
||||
PYBIND11_OVERRIDE_IMPL(PYBIND11_TYPE(ret_type), PYBIND11_TYPE(cname), name, __VA_ARGS__)
|
||||
#define PYBIND11_OVERLOAD_NAME(ret_type, cname, name, fn, ...) \
|
||||
PYBIND11_OVERRIDE_NAME(PYBIND11_TYPE(ret_type), PYBIND11_TYPE(cname), name, fn, __VA_ARGS__)
|
||||
#define PYBIND11_OVERLOAD_PURE_NAME(ret_type, cname, name, fn, ...) \
|
||||
PYBIND11_OVERRIDE_PURE_NAME(PYBIND11_TYPE(ret_type), PYBIND11_TYPE(cname), name, fn, __VA_ARGS__);
|
||||
#define PYBIND11_OVERLOAD(ret_type, cname, fn, ...) \
|
||||
PYBIND11_OVERRIDE(PYBIND11_TYPE(ret_type), PYBIND11_TYPE(cname), fn, __VA_ARGS__)
|
||||
#define PYBIND11_OVERLOAD_PURE(ret_type, cname, fn, ...) \
|
||||
PYBIND11_OVERLOAD_PURE_NAME(PYBIND11_TYPE(ret_type), PYBIND11_TYPE(cname), #fn, fn, __VA_ARGS__)
|
||||
PYBIND11_OVERRIDE_PURE(PYBIND11_TYPE(ret_type), PYBIND11_TYPE(cname), fn, __VA_ARGS__);
|
||||
|
||||
PYBIND11_NAMESPACE_END(PYBIND11_NAMESPACE)
|
||||
|
||||
|
||||
@ -317,7 +317,7 @@ TEST_SUBMODULE(class_, m) {
|
||||
|
||||
class TrampolineB : public ProtectedB {
|
||||
public:
|
||||
int foo() const override { PYBIND11_OVERLOAD(int, ProtectedB, foo, ); }
|
||||
int foo() const override { PYBIND11_OVERRIDE(int, ProtectedB, foo, ); }
|
||||
};
|
||||
|
||||
class PublicistB : public ProtectedB {
|
||||
|
||||
@ -30,7 +30,7 @@ private:
|
||||
class PyWidget final : public Widget {
|
||||
using Widget::Widget;
|
||||
|
||||
int the_answer() const override { PYBIND11_OVERLOAD_PURE(int, Widget, the_answer); }
|
||||
int the_answer() const override { PYBIND11_OVERRIDE_PURE(int, Widget, the_answer); }
|
||||
};
|
||||
|
||||
PYBIND11_EMBEDDED_MODULE(widget_module, m) {
|
||||
|
||||
@ -89,7 +89,7 @@ public:
|
||||
PyTF6(const PyTF6 &f) : TestFactory6(f) { print_copy_created(this); }
|
||||
PyTF6(std::string s) : TestFactory6((int) s.size()) { alias = true; print_created(this, s); }
|
||||
virtual ~PyTF6() { print_destroyed(this); }
|
||||
int get() override { PYBIND11_OVERLOAD(int, TestFactory6, get, /*no args*/); }
|
||||
int get() override { PYBIND11_OVERRIDE(int, TestFactory6, get, /*no args*/); }
|
||||
};
|
||||
|
||||
class TestFactory7 {
|
||||
@ -110,7 +110,7 @@ public:
|
||||
PyTF7(PyTF7 &&f) : TestFactory7(std::move(f)) { print_move_created(this); }
|
||||
PyTF7(const PyTF7 &f) : TestFactory7(f) { print_copy_created(this); }
|
||||
virtual ~PyTF7() { print_destroyed(this); }
|
||||
int get() override { PYBIND11_OVERLOAD(int, TestFactory7, get, /*no args*/); }
|
||||
int get() override { PYBIND11_OVERRIDE(int, TestFactory7, get, /*no args*/); }
|
||||
};
|
||||
|
||||
|
||||
|
||||
@ -22,10 +22,10 @@ public:
|
||||
|
||||
class PyVirtClass : public VirtClass {
|
||||
void virtual_func() override {
|
||||
PYBIND11_OVERLOAD(void, VirtClass, virtual_func,);
|
||||
PYBIND11_OVERRIDE(void, VirtClass, virtual_func,);
|
||||
}
|
||||
void pure_virtual_func() override {
|
||||
PYBIND11_OVERLOAD_PURE(void, VirtClass, pure_virtual_func,);
|
||||
PYBIND11_OVERRIDE_PURE(void, VirtClass, pure_virtual_func,);
|
||||
}
|
||||
};
|
||||
|
||||
|
||||
@ -47,7 +47,7 @@ public:
|
||||
|
||||
int run(int value) override {
|
||||
/* Generate wrapping code that enables native function overloading */
|
||||
PYBIND11_OVERLOAD(
|
||||
PYBIND11_OVERRIDE(
|
||||
int, /* Return type */
|
||||
ExampleVirt, /* Parent class */
|
||||
run, /* Name of function */
|
||||
@ -56,7 +56,7 @@ public:
|
||||
}
|
||||
|
||||
bool run_bool() override {
|
||||
PYBIND11_OVERLOAD_PURE(
|
||||
PYBIND11_OVERRIDE_PURE(
|
||||
bool, /* Return type */
|
||||
ExampleVirt, /* Parent class */
|
||||
run_bool, /* Name of function */
|
||||
@ -66,7 +66,7 @@ public:
|
||||
}
|
||||
|
||||
void pure_virtual() override {
|
||||
PYBIND11_OVERLOAD_PURE(
|
||||
PYBIND11_OVERRIDE_PURE(
|
||||
void, /* Return type */
|
||||
ExampleVirt, /* Parent class */
|
||||
pure_virtual, /* Name of function */
|
||||
@ -78,7 +78,7 @@ public:
|
||||
// We can return reference types for compatibility with C++ virtual interfaces that do so, but
|
||||
// note they have some significant limitations (see the documentation).
|
||||
const std::string &get_string1() override {
|
||||
PYBIND11_OVERLOAD(
|
||||
PYBIND11_OVERRIDE(
|
||||
const std::string &, /* Return type */
|
||||
ExampleVirt, /* Parent class */
|
||||
get_string1, /* Name of function */
|
||||
@ -87,7 +87,7 @@ public:
|
||||
}
|
||||
|
||||
const std::string *get_string2() override {
|
||||
PYBIND11_OVERLOAD(
|
||||
PYBIND11_OVERRIDE(
|
||||
const std::string *, /* Return type */
|
||||
ExampleVirt, /* Parent class */
|
||||
get_string2, /* Name of function */
|
||||
@ -141,11 +141,11 @@ public:
|
||||
class NCVirtTrampoline : public NCVirt {
|
||||
#if !defined(__INTEL_COMPILER) && !defined(__CUDACC__) && !defined(__PGIC__)
|
||||
NonCopyable get_noncopyable(int a, int b) override {
|
||||
PYBIND11_OVERLOAD(NonCopyable, NCVirt, get_noncopyable, a, b);
|
||||
PYBIND11_OVERRIDE(NonCopyable, NCVirt, get_noncopyable, a, b);
|
||||
}
|
||||
#endif
|
||||
Movable get_movable(int a, int b) override {
|
||||
PYBIND11_OVERLOAD_PURE(Movable, NCVirt, get_movable, a, b);
|
||||
PYBIND11_OVERRIDE_PURE(Movable, NCVirt, get_movable, a, b);
|
||||
}
|
||||
};
|
||||
|
||||
@ -159,7 +159,7 @@ struct Base {
|
||||
|
||||
struct DispatchIssue : Base {
|
||||
virtual std::string dispatch() const {
|
||||
PYBIND11_OVERLOAD_PURE(std::string, Base, dispatch, /* no arguments */);
|
||||
PYBIND11_OVERRIDE_PURE(std::string, Base, dispatch, /* no arguments */);
|
||||
}
|
||||
};
|
||||
|
||||
@ -240,7 +240,7 @@ TEST_SUBMODULE(virtual_functions, m) {
|
||||
py::print("PyA.f()");
|
||||
// This convolution just gives a `void`, but tests that PYBIND11_TYPE() works to protect
|
||||
// a type containing a ,
|
||||
PYBIND11_OVERLOAD(PYBIND11_TYPE(typename std::enable_if<true, void>::type), A, f);
|
||||
PYBIND11_OVERRIDE(PYBIND11_TYPE(typename std::enable_if<true, void>::type), A, f);
|
||||
}
|
||||
};
|
||||
|
||||
@ -265,7 +265,7 @@ TEST_SUBMODULE(virtual_functions, m) {
|
||||
~PyA2() { py::print("PyA2.~PyA2()"); }
|
||||
void f() override {
|
||||
py::print("PyA2.f()");
|
||||
PYBIND11_OVERLOAD(void, A2, f);
|
||||
PYBIND11_OVERRIDE(void, A2, f);
|
||||
}
|
||||
};
|
||||
|
||||
@ -304,19 +304,19 @@ TEST_SUBMODULE(virtual_functions, m) {
|
||||
class PyOverrideTest : public OverrideTest {
|
||||
public:
|
||||
using OverrideTest::OverrideTest;
|
||||
std::string str_value() override { PYBIND11_OVERLOAD(std::string, OverrideTest, str_value); }
|
||||
std::string str_value() override { PYBIND11_OVERRIDE(std::string, OverrideTest, str_value); }
|
||||
// Not allowed (uncommenting should hit a static_assert failure): we can't get a reference
|
||||
// to a python numeric value, since we only copy values in the numeric type caster:
|
||||
// std::string &str_ref() override { PYBIND11_OVERLOAD(std::string &, OverrideTest, str_ref); }
|
||||
// std::string &str_ref() override { PYBIND11_OVERRIDE(std::string &, OverrideTest, str_ref); }
|
||||
// But we can work around it like this:
|
||||
private:
|
||||
std::string _tmp;
|
||||
std::string str_ref_helper() { PYBIND11_OVERLOAD(std::string, OverrideTest, str_ref); }
|
||||
std::string str_ref_helper() { PYBIND11_OVERRIDE(std::string, OverrideTest, str_ref); }
|
||||
public:
|
||||
std::string &str_ref() override { return _tmp = str_ref_helper(); }
|
||||
|
||||
A A_value() override { PYBIND11_OVERLOAD(A, OverrideTest, A_value); }
|
||||
A &A_ref() override { PYBIND11_OVERLOAD(A &, OverrideTest, A_ref); }
|
||||
A A_value() override { PYBIND11_OVERRIDE(A, OverrideTest, A_value); }
|
||||
A &A_ref() override { PYBIND11_OVERRIDE(A &, OverrideTest, A_ref); }
|
||||
};
|
||||
|
||||
py::class_<OverrideTest::A>(m, "OverrideTest_A")
|
||||
@ -393,29 +393,29 @@ class D_Tpl : public C_Tpl { D_METHODS };
|
||||
class PyA_Repeat : public A_Repeat {
|
||||
public:
|
||||
using A_Repeat::A_Repeat;
|
||||
int unlucky_number() override { PYBIND11_OVERLOAD_PURE(int, A_Repeat, unlucky_number, ); }
|
||||
std::string say_something(unsigned times) override { PYBIND11_OVERLOAD(std::string, A_Repeat, say_something, times); }
|
||||
int unlucky_number() override { PYBIND11_OVERRIDE_PURE(int, A_Repeat, unlucky_number, ); }
|
||||
std::string say_something(unsigned times) override { PYBIND11_OVERRIDE(std::string, A_Repeat, say_something, times); }
|
||||
};
|
||||
class PyB_Repeat : public B_Repeat {
|
||||
public:
|
||||
using B_Repeat::B_Repeat;
|
||||
int unlucky_number() override { PYBIND11_OVERLOAD(int, B_Repeat, unlucky_number, ); }
|
||||
std::string say_something(unsigned times) override { PYBIND11_OVERLOAD(std::string, B_Repeat, say_something, times); }
|
||||
double lucky_number() override { PYBIND11_OVERLOAD(double, B_Repeat, lucky_number, ); }
|
||||
int unlucky_number() override { PYBIND11_OVERRIDE(int, B_Repeat, unlucky_number, ); }
|
||||
std::string say_something(unsigned times) override { PYBIND11_OVERRIDE(std::string, B_Repeat, say_something, times); }
|
||||
double lucky_number() override { PYBIND11_OVERRIDE(double, B_Repeat, lucky_number, ); }
|
||||
};
|
||||
class PyC_Repeat : public C_Repeat {
|
||||
public:
|
||||
using C_Repeat::C_Repeat;
|
||||
int unlucky_number() override { PYBIND11_OVERLOAD(int, C_Repeat, unlucky_number, ); }
|
||||
std::string say_something(unsigned times) override { PYBIND11_OVERLOAD(std::string, C_Repeat, say_something, times); }
|
||||
double lucky_number() override { PYBIND11_OVERLOAD(double, C_Repeat, lucky_number, ); }
|
||||
int unlucky_number() override { PYBIND11_OVERRIDE(int, C_Repeat, unlucky_number, ); }
|
||||
std::string say_something(unsigned times) override { PYBIND11_OVERRIDE(std::string, C_Repeat, say_something, times); }
|
||||
double lucky_number() override { PYBIND11_OVERRIDE(double, C_Repeat, lucky_number, ); }
|
||||
};
|
||||
class PyD_Repeat : public D_Repeat {
|
||||
public:
|
||||
using D_Repeat::D_Repeat;
|
||||
int unlucky_number() override { PYBIND11_OVERLOAD(int, D_Repeat, unlucky_number, ); }
|
||||
std::string say_something(unsigned times) override { PYBIND11_OVERLOAD(std::string, D_Repeat, say_something, times); }
|
||||
double lucky_number() override { PYBIND11_OVERLOAD(double, D_Repeat, lucky_number, ); }
|
||||
int unlucky_number() override { PYBIND11_OVERRIDE(int, D_Repeat, unlucky_number, ); }
|
||||
std::string say_something(unsigned times) override { PYBIND11_OVERRIDE(std::string, D_Repeat, say_something, times); }
|
||||
double lucky_number() override { PYBIND11_OVERRIDE(double, D_Repeat, lucky_number, ); }
|
||||
};
|
||||
|
||||
// Inheritance approach 2: templated trampoline classes.
|
||||
@ -436,15 +436,15 @@ template <class Base = A_Tpl>
|
||||
class PyA_Tpl : public Base {
|
||||
public:
|
||||
using Base::Base; // Inherit constructors
|
||||
int unlucky_number() override { PYBIND11_OVERLOAD_PURE(int, Base, unlucky_number, ); }
|
||||
std::string say_something(unsigned times) override { PYBIND11_OVERLOAD(std::string, Base, say_something, times); }
|
||||
int unlucky_number() override { PYBIND11_OVERRIDE_PURE(int, Base, unlucky_number, ); }
|
||||
std::string say_something(unsigned times) override { PYBIND11_OVERRIDE(std::string, Base, say_something, times); }
|
||||
};
|
||||
template <class Base = B_Tpl>
|
||||
class PyB_Tpl : public PyA_Tpl<Base> {
|
||||
public:
|
||||
using PyA_Tpl<Base>::PyA_Tpl; // Inherit constructors (via PyA_Tpl's inherited constructors)
|
||||
int unlucky_number() override { PYBIND11_OVERLOAD(int, Base, unlucky_number, ); }
|
||||
double lucky_number() override { PYBIND11_OVERLOAD(double, Base, lucky_number, ); }
|
||||
int unlucky_number() override { PYBIND11_OVERRIDE(int, Base, unlucky_number, ); }
|
||||
double lucky_number() override { PYBIND11_OVERRIDE(double, Base, lucky_number, ); }
|
||||
};
|
||||
// Since C_Tpl and D_Tpl don't declare any new virtual methods, we don't actually need these (we can
|
||||
// use PyB_Tpl<C_Tpl> and PyB_Tpl<D_Tpl> for the trampoline classes instead):
|
||||
|
||||
Loading…
Reference in New Issue
Block a user