src/boost_ci.cpp
88.9% Lines (16/0/18)
75.0% List of functions (3/0/4)
Functions (4)
| Line | TLA | Hits | Source Code |
|---|---|---|---|
| 1 | // | ||
| 2 | // Copyright (c) 2022-2026 Alexander Grund | ||
| 3 | // | ||
| 4 | // Use, modification and distribution is subject to the Boost Software License, | ||
| 5 | // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at | ||
| 6 | // http://www.boost.org/LICENSE_1_0.txt) | ||
| 7 | |||
| 8 | #define BOOST_BOOST_CI_SOURCE | ||
| 9 | |||
| 10 | #include <boost/boost-ci/boost_ci.hpp> | ||
| 11 | // Just some dependency on another Boost library | ||
| 12 | #include <boost/atomic/atomic.hpp> | ||
| 13 | |||
| 14 | #if !(defined(BOOST_NO_CXX11_HDR_FUNCTIONAL) || defined(BOOST_NO_CXX11_RVALUE_REFERENCES) || defined(BOOST_NO_CXX11_AUTO_DECLARATIONS)) | ||
| 15 | #define BOOST_BOOST_CI_TEST_BIND_ISSUE | ||
| 16 | #include <functional> | ||
| 17 | #include <map> | ||
| 18 | #endif | ||
| 19 | #include <utility> | ||
| 20 | |||
| 21 | // Some simple struct big enough so that the atomic is forced to use a lock | ||
| 22 | // forcing it to call into the library | ||
| 23 | struct X | ||
| 24 | { | ||
| 25 | double x, y, z; | ||
| 26 | 5x | explicit X(int value = 0): x(value), y(value), z(value) {} | |
| 27 | }; | ||
| 28 | |||
| 29 | namespace boost | ||
| 30 | { | ||
| 31 | namespace boost_ci | ||
| 32 | { | ||
| 33 | void reproducer(); | ||
| 34 | // Some function to test | ||
| 35 | 3x | int get_answer(const int isMsvc) | |
| 36 | { | ||
| 37 | 3x | reproducer(); | |
| 38 | 3x | boost::atomic<X> answer; | |
| 39 | // Specifically crafted condition to check for coverage from MSVC and non MSVC builds | ||
| 40 | 3x | if(isMsvc == 1) | |
| 41 | ✗ | answer = X(21); | |
| 42 | 3x | else if(isMsvc == 0) | |
| 43 | 4x | answer = X(42); | |
| 44 | else | ||
| 45 | 1x | throw example_error(); | |
| 46 | #ifdef BOOST_NO_CXX11_SMART_PTR | ||
| 47 | return answer.load().x; | ||
| 48 | #else | ||
| 49 | // Just use some stdlib feature combined with a Boost.Config feature as demonstration | ||
| 50 | 4x | auto ptr = std::unique_ptr<int>(new int(answer.load().x)); | |
| 51 | 4x | return *ptr; | |
| 52 | #endif | ||
| 53 | 2x | } | |
| 54 | |||
| 55 | #ifdef BOOST_BOOST_CI_TEST_BIND_ISSUE | ||
| 56 | // Reproducer for a bug observed in Clang 16 with libstdc++ | ||
| 57 | ✗ | void f(const std::pair<int, float>&) {} | |
| 58 | |||
| 59 | 3x | void reproducer() { | |
| 60 | 6x | std::map<int, float> m{{0, 0.f}, {1, 1.f}}; | |
| 61 | |||
| 62 | // Bind a map element (value_type is pair<const int, float>). | ||
| 63 | 3x | auto bound = std::bind(f, *m.begin()); | |
| 64 | |||
| 65 | // The libstdc++ failure happens during instantiation of the defaulted move constructor of std::_Bind, | ||
| 66 | // when it checks whether std::pair can be constructed from the internal tuple-like storage. | ||
| 67 | 3x | auto bound2 = std::move(bound); | |
| 68 | (void)bound2; | ||
| 69 | 3x | } | |
| 70 | #else | ||
| 71 | void reproducer() {} | ||
| 72 | #endif | ||
| 73 | } | ||
| 74 | } | ||
| 75 |