Add pybind11 2.5 source

1 files changed, 168 insertions, 0 deletions

diff --git a/3rdparty/pybind11/tests/test_callbacks.cpp b/3rdparty/pybind11/tests/test_callbacks.cpp
new file mode 100644
index 00000000..71b88c44
--- /dev/null
+++ b/3rdparty/pybind11/tests/test_callbacks.cpp
@@ -0,0 +1,168 @@
+/*
+    tests/test_callbacks.cpp -- callbacks
+
+    Copyright (c) 2016 Wenzel Jakob <wenzel.jakob@epfl.ch>
+
+    All rights reserved. Use of this source code is governed by a
+    BSD-style license that can be found in the LICENSE file.
+*/
+
+#include "pybind11_tests.h"
+#include "constructor_stats.h"
+#include <pybind11/functional.h>
+#include <thread>
+
+
+int dummy_function(int i) { return i + 1; }
+
+TEST_SUBMODULE(callbacks, m) {
+    // test_callbacks, test_function_signatures
+    m.def("test_callback1", [](py::object func) { return func(); });
+    m.def("test_callback2", [](py::object func) { return func("Hello", 'x', true, 5); });
+    m.def("test_callback3", [](const std::function<int(int)> &func) {
+        return "func(43) = " + std::to_string(func(43)); });
+    m.def("test_callback4", []() -> std::function<int(int)> { return [](int i) { return i+1; }; });
+    m.def("test_callback5", []() {
+        return py::cpp_function([](int i) { return i+1; }, py::arg("number"));
+    });
+
+    // test_keyword_args_and_generalized_unpacking
+    m.def("test_tuple_unpacking", [](py::function f) {
+        auto t1 = py::make_tuple(2, 3);
+        auto t2 = py::make_tuple(5, 6);
+        return f("positional", 1, *t1, 4, *t2);
+    });
+
+    m.def("test_dict_unpacking", [](py::function f) {
+        auto d1 = py::dict("key"_a="value", "a"_a=1);
+        auto d2 = py::dict();
+        auto d3 = py::dict("b"_a=2);
+        return f("positional", 1, **d1, **d2, **d3);
+    });
+
+    m.def("test_keyword_args", [](py::function f) {
+        return f("x"_a=10, "y"_a=20);
+    });
+
+    m.def("test_unpacking_and_keywords1", [](py::function f) {
+        auto args = py::make_tuple(2);
+        auto kwargs = py::dict("d"_a=4);
+        return f(1, *args, "c"_a=3, **kwargs);
+    });
+
+    m.def("test_unpacking_and_keywords2", [](py::function f) {
+        auto kwargs1 = py::dict("a"_a=1);
+        auto kwargs2 = py::dict("c"_a=3, "d"_a=4);
+        return f("positional", *py::make_tuple(1), 2, *py::make_tuple(3, 4), 5,
+                 "key"_a="value", **kwargs1, "b"_a=2, **kwargs2, "e"_a=5);
+    });
+
+    m.def("test_unpacking_error1", [](py::function f) {
+        auto kwargs = py::dict("x"_a=3);
+        return f("x"_a=1, "y"_a=2, **kwargs); // duplicate ** after keyword
+    });
+
+    m.def("test_unpacking_error2", [](py::function f) {
+        auto kwargs = py::dict("x"_a=3);
+        return f(**kwargs, "x"_a=1); // duplicate keyword after **
+    });
+
+    m.def("test_arg_conversion_error1", [](py::function f) {
+        f(234, UnregisteredType(), "kw"_a=567);
+    });
+
+    m.def("test_arg_conversion_error2", [](py::function f) {
+        f(234, "expected_name"_a=UnregisteredType(), "kw"_a=567);
+    });
+
+    // test_lambda_closure_cleanup
+    struct Payload {
+        Payload() { print_default_created(this); }
+        ~Payload() { print_destroyed(this); }
+        Payload(const Payload &) { print_copy_created(this); }
+        Payload(Payload &&) { print_move_created(this); }
+    };
+    // Export the payload constructor statistics for testing purposes:
+    m.def("payload_cstats", &ConstructorStats::get<Payload>);
+    /* Test cleanup of lambda closure */
+    m.def("test_cleanup", []() -> std::function<void(void)> {
+        Payload p;
+
+        return [p]() {
+            /* p should be cleaned up when the returned function is garbage collected */
+            (void) p;
+        };
+    });
+
+    // test_cpp_function_roundtrip
+    /* Test if passing a function pointer from C++ -> Python -> C++ yields the original pointer */
+    m.def("dummy_function", &dummy_function);
+    m.def("dummy_function2", [](int i, int j) { return i + j; });
+    m.def("roundtrip", [](std::function<int(int)> f, bool expect_none = false) {
+        if (expect_none && f)
+            throw std::runtime_error("Expected None to be converted to empty std::function");
+        return f;
+    }, py::arg("f"), py::arg("expect_none")=false);
+    m.def("test_dummy_function", [](const std::function<int(int)> &f) -> std::string {
+        using fn_type = int (*)(int);
+        auto result = f.target<fn_type>();
+        if (!result) {
+            auto r = f(1);
+            return "can't convert to function pointer: eval(1) = " + std::to_string(r);
+        } else if (*result == dummy_function) {
+            auto r = (*result)(1);
+            return "matches dummy_function: eval(1) = " + std::to_string(r);
+        } else {
+            return "argument does NOT match dummy_function. This should never happen!";
+        }
+    });
+
+    class AbstractBase { public: virtual unsigned int func() = 0; };
+    m.def("func_accepting_func_accepting_base", [](std::function<double(AbstractBase&)>) { });
+
+    struct MovableObject {
+        bool valid = true;
+
+        MovableObject() = default;
+        MovableObject(const MovableObject &) = default;
+        MovableObject &operator=(const MovableObject &) = default;
+        MovableObject(MovableObject &&o) : valid(o.valid) { o.valid = false; }
+        MovableObject &operator=(MovableObject &&o) {
+            valid = o.valid;
+            o.valid = false;
+            return *this;
+        }
+    };
+    py::class_<MovableObject>(m, "MovableObject");
+
+    // test_movable_object
+    m.def("callback_with_movable", [](std::function<void(MovableObject &)> f) {
+        auto x = MovableObject();
+        f(x); // lvalue reference shouldn't move out object
+        return x.valid; // must still return `true`
+    });
+
+    // test_bound_method_callback
+    struct CppBoundMethodTest {};
+    py::class_<CppBoundMethodTest>(m, "CppBoundMethodTest")
+        .def(py::init<>())
+        .def("triple", [](CppBoundMethodTest &, int val) { return 3 * val; });
+
+    // test async Python callbacks
+    using callback_f = std::function<void(int)>;
+    m.def("test_async_callback", [](callback_f f, py::list work) {
+        // make detached thread that calls `f` with piece of work after a little delay
+        auto start_f = [f](int j) {
+            auto invoke_f = [f, j] {
+                std::this_thread::sleep_for(std::chrono::milliseconds(50));
+                f(j);
+            };
+            auto t = std::thread(std::move(invoke_f));
+            t.detach();
+        };
+
+        // spawn worker threads
+        for (auto i : work)
+            start_f(py::cast<int>(i));
+    });
+}