ceph/src/boost/libs/dll/test/template_method_linux_test.cpp

   1 // Copyright 2019 Ramil Gauss.
   2 // Copyright 2019 Antony Polukhin.
   3 //
   4 // Distributed under the Boost Software License, Version 1.0.
   5 // (See accompanying file LICENSE_1_0.txt
   6 // or copy at http://www.boost.org/LICENSE_1_0.txt)
   7
   8 #include <boost/predef.h>
   9 #if (__cplusplus >= 201402L) || (BOOST_COMP_MSVC >= BOOST_VERSION_NUMBER(14,0,0))
  10
  11 #include <boost/dll/smart_library.hpp>
  12 #include <boost/dll/import_mangled.hpp>
  13 #include <boost/dll/import_class.hpp>
  14
  15 #include <iostream>
  16 #include <string>
  17
  18 #include "../example/b2_workarounds.hpp"
  19 #include <boost/core/lightweight_test.hpp>
  20
  21
  22 namespace space {
  23   class BOOST_SYMBOL_EXPORT my_plugin {
  24   public:
  25     template <typename Arg>
  26     BOOST_SYMBOL_EXPORT int Func(); // defined in cpp_test_library.cpp
  27   };
  28 }
  29
  30 int main(int argc, char** argv) {
  31   unsigned matches_found = 0;
  32   boost::dll::fs::path lib_path = b2_workarounds::first_lib_from_argv(argc, argv);
  33   boost::dll::experimental::smart_library lib(lib_path);
  34
  35   auto storage = lib.symbol_storage().get_storage();
  36   for (auto& s : storage) {
  37     auto& demangled = s.demangled;
  38     BOOST_TEST(demangled.data());
  39
  40     auto beginFound = demangled.find("Func<");
  41     if (beginFound == std::string::npos)
  42       continue;
  43
  44     auto endFound = demangled.find("(");
  45     if (endFound == std::string::npos)
  46       continue;
  47
  48     // Usually "Func<space::my_plugin>" on Linux, "Func<class space::my_plugin>" on Windows.
  49     auto funcName = demangled.substr(beginFound, endFound - beginFound);
  50     std::cout << "Function name: " << funcName.data() << std::endl;
  51     auto typeIndexFunc = boost::dll::experimental::import_mangled<space::my_plugin, int()>(lib, funcName);
  52
  53     space::my_plugin cl;
  54     BOOST_TEST_EQ(typeIndexFunc(&cl), 42);
  55
  56     ++matches_found;
  57     break;
  58   }
  59   BOOST_TEST_EQ(matches_found, 1);
  60
  61   return boost::report_errors();
  62 }
  63
  64
  65 #else
  66 int main() {}
  67 #endif