websocketpp库中的错误和Windows Visual Studio 2015中的提升[关闭]

Posted 2023-02-16

【中文标题】websocketpp库中的错误和Windows Visual Studio 2015中的提升[关闭]

【英文标题】：Error in websocketpp library and boost in windows Visual Studio 2015 [closed]

【发布时间】：2015-10-06 11:54:05

【问题描述】：

我正在尝试从开发人员 github 编译这个简单的示例 https://github.com/zaphoyd/websocketpp/blob/master/examples/echo_server/echo_server.cpp，但我在代码之外遇到了奇怪的错误。

我也尝试过打开 /Za 选项，如本文所示：VC++ 2012 and Boost incompatibility - `throw()` specifications in library headers 但它会引发不同的错误，说“线程支持不可用：它已被 BOOST_DISABLE_THREADS 明确禁用”

有人知道如何解决这个问题吗？ 谢谢！

错误： 我在 Windows10 x64 中使用 Visual Studio 2015， C:\websocketpp\websocketpp/transport/base/connection.hpp(187): error C2694: 'const char *websocketpp::transport::error::category::name(void) const': overriding virtual function has less restrictive exception specification than base class virtual member function 'const char *std::error_category::name(void) noexcept const' 1> C:\websocketpp\websocketpp/transport/base/connection.hpp(187): note: see declaration of 'websocketpp::transport::error::category::name' 1> C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\system_error(167): note: see declaration of 'std::error_category::name' 1>C:\websocketpp\websocketpp/transport/iostream/base.hpp(89): error C2694: 'const char *websocketpp::transport::iostream::error::category::name(void) const': overriding virtual function has less restrictive exception specification than base class virtual member function 'const char *std::error_category::name(void) noexcept const' 1> C:\websocketpp\websocketpp/transport/iostream/base.hpp(89): note: see declaration of 'websocketpp::transport::iostream::error::category::name' 1> C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\system_error(167): note: see declaration of 'std::error_category::name' 1>C:\websocketpp\websocketpp/error.hpp(151): error C2694: 'const char *websocketpp::error::category::name(void) const': overriding virtual function has less restrictive exception specification than base class virtual member function 'const char *std::error_category::name(void) noexcept const' 1> C:\websocketpp\websocketpp/error.hpp(151): note: see declaration of 'websocketpp::error::category::name' 1> C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\system_error(167): note: see declaration of 'std::error_category::name' 1>C:\websocketpp\websocketpp/frame.hpp(831): warning C4267: '=': conversion from 'size_t' to 'uint32_t', possible loss of data 1>C:\websocketpp\websocketpp/extensions/extension.hpp(65): error C2694: 'const char *websocketpp::extensions::error::category::name(void) const': overriding virtual function has less restrictive exception specification than base class virtual member function 'const char *std::error_category::name(void) noexcept const' 1> C:\websocketpp\websocketpp/extensions/extension.hpp(65): note: see declaration of 'websocketpp::extensions::error::category::name' 1> C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\system_error(167): note: see declaration of 'std::error_category::name' 1>C:\local\boost_1_59_0\boost/asio/detail/config.hpp(227): warning C4005: 'BOOST_ASIO_ERROR_CATEGORY_NOEXCEPT': macro redefinition 1> C:\local\boost_1_59_0\boost/asio/detail/config.hpp(213): note: see previous definition of 'BOOST_ASIO_ERROR_CATEGORY_NOEXCEPT' 1>C:\websocketpp\websocketpp/transport/asio/base.hpp(189): error C2694: 'const char *websocketpp::transport::asio::error::category::name(void) const': overriding virtual function has less restrictive exception specification than base class virtual member function 'const char *std::error_category::name(void) noexcept const' 1> C:\websocketpp\websocketpp/transport/asio/base.hpp(189): note: see declaration of 'websocketpp::transport::asio::error::category::name' 1> C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\system_error(167): note: see declaration of 'std::error_category::name' 1>C:\websocketpp\websocketpp/transport/asio/security/base.hpp(109): error C2694: 'const char *websocketpp::transport::asio::socket::socket_category::name(void) const': overriding virtual function has less restrictive exception specification than base class virtual member function 'const char *std::error_category::name(void) noexcept const' 1> C:\websocketpp\websocketpp/transport/asio/security/base.hpp(109): note: see declaration of 'websocketpp::transport::asio::socket::socket_category::name' 1> C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\system_error(167): note: see declaration of 'std::error_category::name' 1>C:\websocketpp\websocketpp/processors/base.hpp(165): error C2694: 'const char *websocketpp::processor::error::processor_category::name(void) const': overriding virtual function has less restrictive exception specification than base class virtual member function 'const char *std::error_category::name(void) noexcept const' 1> C:\websocketpp\websocketpp/processors/base.hpp(165): note: see declaration of 'websocketpp::processor::error::processor_category::name' 1> C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\system_error(167): note: see declaration of 'std::error_category::name' 1>C:\websocketpp\websocketpp/common/md5.hpp(367): warning C4267: '+=': conversion from 'size_t' to 'websocketpp::md5::md5_word_t', possible loss of data 1>C:\websocketpp\websocketpp/sha1/sha1.hpp(176): warning C4267: '=': conversion from 'size_t' to 'unsigned int', possible loss of data ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

【问题讨论】：

刚刚google了这个，找到了你的帖子，对我来说它看起来像一个错误，它不能解释VS2015有constexpr和noexcept的事实。我在 cpp11.h 中添加了异常，但现在我收到了 boost::milliseconds 和 chrono 持续时间的错误。 boost::asio::basic_waitable_timer<:chrono::steady_clock>,boost::asio::waitable_timer_service>::basic_waitable_timer(const boost::asio: :basic_waitable_timer> &)': 无法将参数 2 从 'boost::chrono::milliseconds' 转换为 'c

【参考方案1】：

定义 _WEBSOCKETPP_NOEXCEPT_ 和 _WEBSOCKETPP_CPP11_CHRONO_ 对我有用 :) https://github.com/zaphoyd/websocketpp/issues/437

【讨论】：

谢谢！这对我行得通。只是为了帮助其他可能有同样问题的人，我不得不添加这个：` #define WEBSOCKETPP_NOEXCEPT 1 #define WEBSOCKETPP_CPP11_CHRONO 1 #include <...>