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3f589379ec
This commit rewrites the examples that look for constructor/destructor calls to do so via static variable tracking rather than output parsing. The added ConstructorStats class provides methods to keep track of constructors and destructors, number of default/copy/move constructors, and number of copy/move assignments. It also provides a mechanism for storing values (e.g. for value construction), and then allows all of this to be checked at the end of a test by getting the statistics for a C++ (or python mapping) class. By not relying on the precise pattern of constructions/destructions, but rather simply ensuring that every construction is matched with a destruction on the same object, we ensure that everything that gets created also gets destroyed as expected. This replaces all of the various "std::cout << whatever" code in constructors/destructors with `print_created(this)`/`print_destroyed(this)`/etc. functions which provide similar output, but now has a unified format across the different examples, including a new ### prefix that makes mixed example output and lifecycle events easier to distinguish. With this change, relaxed mode is no longer needed, which enables testing for proper destruction under MSVC, and under any other compiler that generates code calling extra constructors, or optimizes away any constructors. GCC/clang are used as the baseline for move constructors; the tests are adapted to allow more move constructors to be evoked (but other types are constructors much have matching counts). This commit also disables output buffering of tests, as the buffering sometimes results in C++ output ending up in the middle of python output (or vice versa), depending on the OS/python version.
83 lines
2.7 KiB
C++
83 lines
2.7 KiB
C++
/*
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example/example.cpp -- pybind example plugin
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Copyright (c) 2016 Wenzel Jakob <wenzel.jakob@epfl.ch>
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All rights reserved. Use of this source code is governed by a
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BSD-style license that can be found in the LICENSE file.
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*/
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#include "example.h"
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#include "constructor-stats.h"
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void init_ex_methods_and_attributes(py::module &);
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void init_ex_python_types(py::module &);
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void init_ex_operator_overloading(py::module &);
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void init_ex_constants_and_functions(py::module &);
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void init_ex_callbacks(py::module &);
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void init_ex_sequences_and_iterators(py::module &);
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void init_ex_buffers(py::module &);
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void init_ex_smart_ptr(py::module &);
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void init_ex_modules(py::module &);
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void init_ex_numpy_vectorize(py::module &);
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void init_ex_arg_keywords_and_defaults(py::module &);
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void init_ex_virtual_functions(py::module &);
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void init_ex_keep_alive(py::module &);
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void init_ex_opaque_types(py::module &);
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void init_ex_pickling(py::module &);
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void init_ex_inheritance(py::module &);
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void init_ex_stl_binder_vector(py::module &);
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void init_ex_eval(py::module &);
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void init_ex_custom_exceptions(py::module &);
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void init_issues(py::module &);
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#if defined(PYBIND11_TEST_EIGEN)
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void init_eigen(py::module &);
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#endif
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void bind_ConstructorStats(py::module &m) {
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py::class_<ConstructorStats>(m, "ConstructorStats")
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.def("alive", &ConstructorStats::alive)
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.def("values", &ConstructorStats::values)
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.def_readwrite("default_constructions", &ConstructorStats::default_constructions)
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.def_readwrite("copy_assignments", &ConstructorStats::copy_assignments)
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.def_readwrite("move_assignments", &ConstructorStats::move_assignments)
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.def_readwrite("copy_constructions", &ConstructorStats::copy_constructions)
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.def_readwrite("move_constructions", &ConstructorStats::move_constructions)
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.def_static("get", (ConstructorStats &(*)(py::object)) &ConstructorStats::get, py::return_value_policy::reference_internal)
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;
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}
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PYBIND11_PLUGIN(example) {
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py::module m("example", "pybind example plugin");
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bind_ConstructorStats(m);
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init_ex_methods_and_attributes(m);
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init_ex_python_types(m);
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init_ex_operator_overloading(m);
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init_ex_constants_and_functions(m);
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init_ex_callbacks(m);
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init_ex_sequences_and_iterators(m);
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init_ex_buffers(m);
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init_ex_smart_ptr(m);
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init_ex_modules(m);
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init_ex_numpy_vectorize(m);
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init_ex_arg_keywords_and_defaults(m);
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init_ex_virtual_functions(m);
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init_ex_keep_alive(m);
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init_ex_opaque_types(m);
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init_ex_pickling(m);
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init_ex_inheritance(m);
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init_ex_stl_binder_vector(m);
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init_ex_eval(m);
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init_ex_custom_exceptions(m);
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init_issues(m);
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#if defined(PYBIND11_TEST_EIGEN)
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init_eigen(m);
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#endif
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return m.ptr();
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}
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