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							93 lines
						
					
					
						
							3.0 KiB
						
					
					
				
								/*
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								    tests/test_kwargs_and_defaults.cpp -- keyword arguments and default values
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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 "pybind11_tests.h"
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								#include <pybind11/stl.h>
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								std::string kw_func(int x, int y) { return "x=" + std::to_string(x) + ", y=" + std::to_string(y); }
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								std::string kw_func4(const std::vector<int> &entries) {
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								    std::string ret = "{";
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								    for (int i : entries)
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								        ret += std::to_string(i) + " ";
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								    ret.back() = '}';
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								    return ret;
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								}
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								py::tuple args_function(py::args args) {
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								    return args;
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								}
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								py::tuple args_kwargs_function(py::args args, py::kwargs kwargs) {
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								    return py::make_tuple(args, kwargs);
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								}
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								py::tuple mixed_plus_args(int i, double j, py::args args) {
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								    return py::make_tuple(i, j, args);
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								}
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								py::tuple mixed_plus_kwargs(int i, double j, py::kwargs kwargs) {
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								    return py::make_tuple(i, j, kwargs);
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								}
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								py::tuple mixed_plus_args_kwargs(int i, double j, py::args args, py::kwargs kwargs) {
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								    return py::make_tuple(i, j, args, kwargs);
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								}
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								// pybind11 won't allow these to be bound: args and kwargs, if present, must be at the end.
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								void bad_args1(py::args, int) {}
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								void bad_args2(py::kwargs, int) {}
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								void bad_args3(py::kwargs, py::args) {}
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								void bad_args4(py::args, int, py::kwargs) {}
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								void bad_args5(py::args, py::kwargs, int) {}
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								void bad_args6(py::args, py::args) {}
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								void bad_args7(py::kwargs, py::kwargs) {}
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								struct KWClass {
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								    void foo(int, float) {}
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								};
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								test_initializer arg_keywords_and_defaults([](py::module &m) {
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								    m.def("kw_func0", &kw_func);
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								    m.def("kw_func1", &kw_func, py::arg("x"), py::arg("y"));
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								    m.def("kw_func2", &kw_func, py::arg("x") = 100, py::arg("y") = 200);
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								    m.def("kw_func3", [](const char *) { }, py::arg("data") = std::string("Hello world!"));
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								    /* A fancier default argument */
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								    std::vector<int> list;
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								    list.push_back(13);
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								    list.push_back(17);
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								    m.def("kw_func4", &kw_func4, py::arg("myList") = list);
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								    m.def("args_function", &args_function);
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								    m.def("args_kwargs_function", &args_kwargs_function);
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								    m.def("kw_func_udl", &kw_func, "x"_a, "y"_a=300);
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								    m.def("kw_func_udl_z", &kw_func, "x"_a, "y"_a=0);
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								    py::class_<KWClass>(m, "KWClass")
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								        .def("foo0", &KWClass::foo)
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								        .def("foo1", &KWClass::foo, "x"_a, "y"_a);
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								    m.def("mixed_plus_args", &mixed_plus_args);
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								    m.def("mixed_plus_kwargs", &mixed_plus_kwargs);
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								    m.def("mixed_plus_args_kwargs", &mixed_plus_args_kwargs);
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								    m.def("mixed_plus_args_kwargs_defaults", &mixed_plus_args_kwargs,
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								            py::arg("i") = 1, py::arg("j") = 3.14159);
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								    // Uncomment these to test that the static_assert is indeed working:
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								//    m.def("bad_args1", &bad_args1);
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								//    m.def("bad_args2", &bad_args2);
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								//    m.def("bad_args3", &bad_args3);
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								//    m.def("bad_args4", &bad_args4);
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								//    m.def("bad_args5", &bad_args5);
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								//    m.def("bad_args6", &bad_args6);
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								//    m.def("bad_args7", &bad_args7);
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								});
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