test_constants_and_functions.cpp revision 12391:ceeca8b41e4b 
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()           { return "test_function()"; }
27py::str test_function4(char *)     { return "test_function(char *)"; }
28py::str test_function4(int, float) { return "test_function(int, float)"; }
29py::str test_function4(float, int) { return "test_function(float, int)"; }
30
31py::bytes return_bytes() {
32    const char *data = "\x01\x00\x02\x00";
33    return std::string(data, 4);
34}
35
36std::string print_bytes(py::bytes bytes) {
37    std::string ret = "bytes[";
38    const auto value = static_cast<std::string>(bytes);
39    for (size_t i = 0; i < value.length(); ++i) {
40        ret += std::to_string(static_cast<int>(value[i])) + " ";
41    }
42    ret.back() = ']';
43    return ret;
44}
45
46// Test that we properly handle C++17 exception specifiers (which are part of the function signature
47// in C++17).  These should all still work before C++17, but don't affect the function signature.
48namespace test_exc_sp {
49int f1(int x) noexcept { return x+1; }
50int f2(int x) noexcept(true) { return x+2; }
51int f3(int x) noexcept(false) { return x+3; }
52int f4(int x) throw() { return x+4; } // Deprecated equivalent to noexcept(true)
53struct C {
54    int m1(int x) noexcept { return x-1; }
55    int m2(int x) const noexcept { return x-2; }
56    int m3(int x) noexcept(true) { return x-3; }
57    int m4(int x) const noexcept(true) { return x-4; }
58    int m5(int x) noexcept(false) { return x-5; }
59    int m6(int x) const noexcept(false) { return x-6; }
60    int m7(int x) throw() { return x-7; }
61    int m8(int x) const throw() { return x-8; }
62};
63}
64
65
66TEST_SUBMODULE(constants_and_functions, m) {
67    // test_constants
68    m.attr("some_constant") = py::int_(14);
69
70    // test_function_overloading
71    m.def("test_function", &test_function1);
72    m.def("test_function", &test_function2);
73    m.def("test_function", &test_function3);
74
75#if defined(PYBIND11_OVERLOAD_CAST)
76    m.def("test_function", py::overload_cast<>(&test_function4));
77    m.def("test_function", py::overload_cast<char *>(&test_function4));
78    m.def("test_function", py::overload_cast<int, float>(&test_function4));
79    m.def("test_function", py::overload_cast<float, int>(&test_function4));
80#else
81    m.def("test_function", static_cast<py::str (*)()>(&test_function4));
82    m.def("test_function", static_cast<py::str (*)(char *)>(&test_function4));
83    m.def("test_function", static_cast<py::str (*)(int, float)>(&test_function4));
84    m.def("test_function", static_cast<py::str (*)(float, int)>(&test_function4));
85#endif
86
87    py::enum_<MyEnum>(m, "MyEnum")
88        .value("EFirstEntry", EFirstEntry)
89        .value("ESecondEntry", ESecondEntry)
90        .export_values();
91
92    // test_bytes
93    m.def("return_bytes", &return_bytes);
94    m.def("print_bytes", &print_bytes);
95
96    // test_exception_specifiers
97    using namespace test_exc_sp;
98    py::class_<C>(m, "C")
99        .def(py::init<>())
100        .def("m1", &C::m1)
101        .def("m2", &C::m2)
102        .def("m3", &C::m3)
103        .def("m4", &C::m4)
104        .def("m5", &C::m5)
105        .def("m6", &C::m6)
106        .def("m7", &C::m7)
107        .def("m8", &C::m8)
108        ;
109    m.def("f1", f1);
110    m.def("f2", f2);
111    m.def("f3", f3);
112    m.def("f4", f4);
113}
114