test_constants_and_functions.cpp revision 12037:d28054ac6ec9 
1/*
2    tests/test_constants_and_functions.cpp -- global constants and functions, enumerations, raw byte strings
3
4    Copyright (c) 2016 Wenzel Jakob <wenzel.jakob@epfl.ch>
5
6    All rights reserved. Use of this source code is governed by a
7    BSD-style license that can be found in the LICENSE file.
8*/
9
10#include "pybind11_tests.h"
11
12enum MyEnum { EFirstEntry = 1, ESecondEntry };
13
14std::string test_function1() {
15    return "test_function()";
16}
17
18std::string test_function2(MyEnum k) {
19    return "test_function(enum=" + std::to_string(k) + ")";
20}
21
22std::string test_function3(int i) {
23    return "test_function(" + std::to_string(i) + ")";
24}
25
26py::str test_function4(int, float) { return "test_function(int, float)"; }
27py::str test_function4(float, int) { return "test_function(float, int)"; }
28
29py::bytes return_bytes() {
30    const char *data = "\x01\x00\x02\x00";
31    return std::string(data, 4);
32}
33
34std::string print_bytes(py::bytes bytes) {
35    std::string ret = "bytes[";
36    const auto value = static_cast<std::string>(bytes);
37    for (size_t i = 0; i < value.length(); ++i) {
38        ret += std::to_string(static_cast<int>(value[i])) + " ";
39    }
40    ret.back() = ']';
41    return ret;
42}
43
44// Test that we properly handle C++17 exception specifiers (which are part of the function signature
45// in C++17).  These should all still work before C++17, but don't affect the function signature.
46namespace test_exc_sp {
47int f1(int x) noexcept { return x+1; }
48int f2(int x) noexcept(true) { return x+2; }
49int f3(int x) noexcept(false) { return x+3; }
50int f4(int x) throw() { return x+4; } // Deprecated equivalent to noexcept(true)
51struct C {
52    int m1(int x) noexcept { return x-1; }
53    int m2(int x) const noexcept { return x-2; }
54    int m3(int x) noexcept(true) { return x-3; }
55    int m4(int x) const noexcept(true) { return x-4; }
56    int m5(int x) noexcept(false) { return x-5; }
57    int m6(int x) const noexcept(false) { return x-6; }
58    int m7(int x) throw() { return x-7; }
59    int m8(int x) const throw() { return x-8; }
60};
61}
62
63
64test_initializer constants_and_functions([](py::module &m) {
65    m.attr("some_constant") = py::int_(14);
66
67    m.def("test_function", &test_function1);
68    m.def("test_function", &test_function2);
69    m.def("test_function", &test_function3);
70
71#if defined(PYBIND11_OVERLOAD_CAST)
72    m.def("test_function", py::overload_cast<int, float>(&test_function4));
73    m.def("test_function", py::overload_cast<float, int>(&test_function4));
74#else
75    m.def("test_function", static_cast<py::str (*)(int, float)>(&test_function4));
76    m.def("test_function", static_cast<py::str (*)(float, int)>(&test_function4));
77#endif
78
79    py::enum_<MyEnum>(m, "MyEnum")
80        .value("EFirstEntry", EFirstEntry)
81        .value("ESecondEntry", ESecondEntry)
82        .export_values();
83
84    m.def("return_bytes", &return_bytes);
85    m.def("print_bytes", &print_bytes);
86
87    using namespace test_exc_sp;
88    py::module m2 = m.def_submodule("exc_sp");
89    py::class_<C>(m2, "C")
90        .def(py::init<>())
91        .def("m1", &C::m1)
92        .def("m2", &C::m2)
93        .def("m3", &C::m3)
94        .def("m4", &C::m4)
95        .def("m5", &C::m5)
96        .def("m6", &C::m6)
97        .def("m7", &C::m7)
98        .def("m8", &C::m8)
99        ;
100    m2.def("f1", f1);
101    m2.def("f2", f2);
102    m2.def("f3", f3);
103    m2.def("f4", f4);
104});
105