首页 \ 问答 \ 命名空间'std'中的错误'underlying_type_t'没有在project-OSRM中的example.cpp中命名模板类型(error ‘underlying_type_t’ in namespace ‘std’ does not name a template type in example.cpp from project-OSRM)

命名空间'std'中的错误'underlying_type_t'没有在project-OSRM中的example.cpp中命名模板类型(error ‘underlying_type_t’ in namespace ‘std’ does not name a template type in example.cpp from project-OSRM)

 我尝试执行Project-OSRM的examle.cpp文件。 我做了以下步骤：  
 
  如此处所述，从源代码构建OSRM  
  在新终端：cd osrm-backend / example  
  在终端：cmake ..  
  在终端：cmake --build。  
  在终端：sudo cmake --build。 --target install  
  将地图承包商 ， 引擎 ， 提取器 ， 分区 ， 存储 ， util从/ usr / local / include / osrm移动到/ usr / local / include （否则错误映射不在/ usr / local / include中）  
  在终端中：g ++ -std = c ++ 11 example.cpp -o example  
 
 但是我得到了错误  
‘underlying_type_t’ in namespace ‘std’ does not name a template type
     static_cast<std::underlying_type_t<RouteParameters::AnnotationsType>>
 
 有谁知道我做错了什么或出了什么问题以及如何解决这个问题？  
 错误信息  
In file included from /usr/local/include/engine/api/match_parameters.hpp:31:0,
                 from /usr/local/include/osrm/match_parameters.hpp:31,
                 from example.cpp:1:
/usr/local/include/engine/api/route_parameters.hpp: In function ‘bool osrm::engine::api::operator&(osrm::engine::api::RouteParameters::AnnotationsType, osrm::engine::api::RouteParameters::AnnotationsType)’:
/usr/local/include/engine/api/route_parameters.hpp:144:26: error: ‘underlying_type_t’ in namespace ‘std’ does not name a template type
         static_cast<std::underlying_type_t<RouteParameters::AnnotationsType>>(l
                          ^
/usr/local/include/engine/api/route_parameters.hpp:144:43: error: expected ‘>’ before ‘<’ token
         static_cast<std::underlying_type_t<RouteParameters::AnnotationsType>>(l
                                           ^
/usr/local/include/engine/api/route_parameters.hpp:144:43: error: expected ‘(’ before ‘<’ token
/usr/local/include/engine/api/route_parameters.hpp:144:43: error: expected primary-expression before ‘<’ token
/usr/local/include/engine/api/route_parameters.hpp:144:76: error: expected primary-expression before ‘>>’ token
    static_cast<std::underlying_type_t<RouteParameters::AnnotationsType>>(lhs) &
                                                                       ^
/usr/local/include/engine/api/route_parameters.hpp:145:26: error: ‘underlying_type_t’ in namespace ‘std’ does not name a template type
         static_cast<std::underlying_type_t<RouteParameters::AnnotationsType>>(r
                          ^
/usr/local/include/engine/api/route_parameters.hpp:145:43: error: expected ‘>’ before ‘<’ token
         static_cast<std::underlying_type_t<RouteParameters::AnnotationsType>>(r
                                           ^
/usr/local/include/engine/api/route_parameters.hpp:145:43: error: expected ‘(’ before ‘<’ token
/usr/local/include/engine/api/route_parameters.hpp:145:43: error: expected primary-expression before ‘<’ token
/usr/local/include/engine/api/route_parameters.hpp:145:76: error: expected primary-expression before ‘>>’ token
    static_cast<std::underlying_type_t<RouteParameters::AnnotationsType>>(rhs));
                                                                       ^
/usr/local/include/engine/api/route_parameters.hpp:145:84: error: expected ‘)’ before ‘;’ token
    static_cast<std::underlying_type_t<RouteParameters::AnnotationsType>>(rhs));
                                                                               ^
/usr/local/include/engine/api/route_parameters.hpp:145:84: error: expected ‘)’ before ‘;’ token
/usr/local/include/engine/api/route_parameters.hpp: In function ‘osrm::engine::api::RouteParameters::AnnotationsType osrm::engine::api::operator|(osrm::engine::api::RouteParameters::AnnotationsType, osrm::engine::api::RouteParameters::AnnotationsType)’:
/usr/local/include/engine/api/route_parameters.hpp:152:26: error: ‘underlying_type_t’ in namespace ‘std’ does not name a template type
         static_cast<std::underlying_type_t<RouteParameters::AnnotationsType>>(l
                          ^
/usr/local/include/engine/api/route_parameters.hpp:152:43: error: expected ‘>’ before ‘<’ token
         static_cast<std::underlying_type_t<RouteParameters::AnnotationsType>>(l
                                           ^
/usr/local/include/engine/api/route_parameters.hpp:152:43: error: expected ‘(’ before ‘<’ token
/usr/local/include/engine/api/route_parameters.hpp:152:43: error: expected primary-expression before ‘<’ token
/usr/local/include/engine/api/route_parameters.hpp:152:76: error: expected primary-expression before ‘>>’ token
    static_cast<std::underlying_type_t<RouteParameters::AnnotationsType>>(lhs) |
                                                                       ^
/usr/local/include/engine/api/route_parameters.hpp:153:26: error: ‘underlying_type_t’ in namespace ‘std’ does not name a template type
         static_cast<std::underlying_type_t<RouteParameters::AnnotationsType>>(r
                          ^
/usr/local/include/engine/api/route_parameters.hpp:153:43: error: expected ‘>’ before ‘<’ token
         static_cast<std::underlying_type_t<RouteParameters::AnnotationsType>>(r
                                           ^
/usr/local/include/engine/api/route_parameters.hpp:153:43: error: expected ‘(’ before ‘<’ token
/usr/local/include/engine/api/route_parameters.hpp:153:43: error: expected primary-expression before ‘<’ token
/usr/local/include/engine/api/route_parameters.hpp:153:76: error: expected primary-expression before ‘>>’ token
    static_cast<std::underlying_type_t<RouteParameters::AnnotationsType>>(rhs));
                                                                       ^
/usr/local/include/engine/api/route_parameters.hpp:153:84: error: expected ‘)’ before ‘;’ token
    static_cast<std::underlying_type_t<RouteParameters::AnnotationsType>>(rhs));
                                                                               ^
/usr/local/include/engine/api/route_parameters.hpp:153:84: error: expected ‘)’ before ‘;’ token

I try to execute the examle.cpp file of Project-OSRM. I did the following steps: 
 
 build OSRM from source as described here 
 in new terminal: cd osrm-backend/example 
 in the terminal: cmake .. 
 in the terminal: cmake --build . 
 in the terminal: sudo cmake --build . --target install 
 move the maps contractor, engine, extractor, partition, storage, util from /usr/local/include/osrm to /usr/local/include (else error maps are not in /usr/local/include) 
 in the terminal: g++ -std=c++11 example.cpp -o example 
 
But I get the error 
‘underlying_type_t’ in namespace ‘std’ does not name a template type
     static_cast<std::underlying_type_t<RouteParameters::AnnotationsType>>
 
Does anyone have a idea what I'm doing wrong or what is going wrong and how to solve this? 
Error message 
In file included from /usr/local/include/engine/api/match_parameters.hpp:31:0,
                 from /usr/local/include/osrm/match_parameters.hpp:31,
                 from example.cpp:1:
/usr/local/include/engine/api/route_parameters.hpp: In function ‘bool osrm::engine::api::operator&(osrm::engine::api::RouteParameters::AnnotationsType, osrm::engine::api::RouteParameters::AnnotationsType)’:
/usr/local/include/engine/api/route_parameters.hpp:144:26: error: ‘underlying_type_t’ in namespace ‘std’ does not name a template type
         static_cast<std::underlying_type_t<RouteParameters::AnnotationsType>>(l
                          ^
/usr/local/include/engine/api/route_parameters.hpp:144:43: error: expected ‘>’ before ‘<’ token
         static_cast<std::underlying_type_t<RouteParameters::AnnotationsType>>(l
                                           ^
/usr/local/include/engine/api/route_parameters.hpp:144:43: error: expected ‘(’ before ‘<’ token
/usr/local/include/engine/api/route_parameters.hpp:144:43: error: expected primary-expression before ‘<’ token
/usr/local/include/engine/api/route_parameters.hpp:144:76: error: expected primary-expression before ‘>>’ token
    static_cast<std::underlying_type_t<RouteParameters::AnnotationsType>>(lhs) &
                                                                       ^
/usr/local/include/engine/api/route_parameters.hpp:145:26: error: ‘underlying_type_t’ in namespace ‘std’ does not name a template type
         static_cast<std::underlying_type_t<RouteParameters::AnnotationsType>>(r
                          ^
/usr/local/include/engine/api/route_parameters.hpp:145:43: error: expected ‘>’ before ‘<’ token
         static_cast<std::underlying_type_t<RouteParameters::AnnotationsType>>(r
                                           ^
/usr/local/include/engine/api/route_parameters.hpp:145:43: error: expected ‘(’ before ‘<’ token
/usr/local/include/engine/api/route_parameters.hpp:145:43: error: expected primary-expression before ‘<’ token
/usr/local/include/engine/api/route_parameters.hpp:145:76: error: expected primary-expression before ‘>>’ token
    static_cast<std::underlying_type_t<RouteParameters::AnnotationsType>>(rhs));
                                                                       ^
/usr/local/include/engine/api/route_parameters.hpp:145:84: error: expected ‘)’ before ‘;’ token
    static_cast<std::underlying_type_t<RouteParameters::AnnotationsType>>(rhs));
                                                                               ^
/usr/local/include/engine/api/route_parameters.hpp:145:84: error: expected ‘)’ before ‘;’ token
/usr/local/include/engine/api/route_parameters.hpp: In function ‘osrm::engine::api::RouteParameters::AnnotationsType osrm::engine::api::operator|(osrm::engine::api::RouteParameters::AnnotationsType, osrm::engine::api::RouteParameters::AnnotationsType)’:
/usr/local/include/engine/api/route_parameters.hpp:152:26: error: ‘underlying_type_t’ in namespace ‘std’ does not name a template type
         static_cast<std::underlying_type_t<RouteParameters::AnnotationsType>>(l
                          ^
/usr/local/include/engine/api/route_parameters.hpp:152:43: error: expected ‘>’ before ‘<’ token
         static_cast<std::underlying_type_t<RouteParameters::AnnotationsType>>(l
                                           ^
/usr/local/include/engine/api/route_parameters.hpp:152:43: error: expected ‘(’ before ‘<’ token
/usr/local/include/engine/api/route_parameters.hpp:152:43: error: expected primary-expression before ‘<’ token
/usr/local/include/engine/api/route_parameters.hpp:152:76: error: expected primary-expression before ‘>>’ token
    static_cast<std::underlying_type_t<RouteParameters::AnnotationsType>>(lhs) |
                                                                       ^
/usr/local/include/engine/api/route_parameters.hpp:153:26: error: ‘underlying_type_t’ in namespace ‘std’ does not name a template type
         static_cast<std::underlying_type_t<RouteParameters::AnnotationsType>>(r
                          ^
/usr/local/include/engine/api/route_parameters.hpp:153:43: error: expected ‘>’ before ‘<’ token
         static_cast<std::underlying_type_t<RouteParameters::AnnotationsType>>(r
                                           ^
/usr/local/include/engine/api/route_parameters.hpp:153:43: error: expected ‘(’ before ‘<’ token
/usr/local/include/engine/api/route_parameters.hpp:153:43: error: expected primary-expression before ‘<’ token
/usr/local/include/engine/api/route_parameters.hpp:153:76: error: expected primary-expression before ‘>>’ token
    static_cast<std::underlying_type_t<RouteParameters::AnnotationsType>>(rhs));
                                                                       ^
/usr/local/include/engine/api/route_parameters.hpp:153:84: error: expected ‘)’ before ‘;’ token
    static_cast<std::underlying_type_t<RouteParameters::AnnotationsType>>(rhs));
                                                                               ^
/usr/local/include/engine/api/route_parameters.hpp:153:84: error: expected ‘)’ before ‘;’ token

原文：https://stackoverflow.com/questions/44197178

更新时间：2023-06-22 14:06

最满意答案

 是的，这不行。 桌面会话中的每个唯一窗口都必须具有唯一的Windows“类名”，该字符串传递给RegisterClassEx（）winapi函数并在CreateWindowEx（）中使用。 Winforms自动生成这些名称，因此它有责任确保它生成的名称不会与其他进程和appdomains中的窗口名称冲突。 这就是为什么你看到这些奇怪的名字，最重要的部分是你的例子中的最后一点39cfeeb，AppDomain.GetHashCode（）返回的值。 您无法从外部进程检索该哈希代码。  
 您需要一种根本不同的方法，而不依赖于易于获得的类名。 查看Managed Spy代码 ，它支持在外部Winforms进程上使用Reflection。 隔离它使用的DLL注入代码技术，这样你就可以在自己的代码中自己使用它来完成一些工作。  
 这也是你从过程中获得.NET类名的唯一方法，在使用UI自动化时你从未真正关心过这个问题。 

Yes, this can't work. Every unique window in a desktop session must have a unique Windows "class name", the string passed to the RegisterClassEx() winapi function and used in CreateWindowEx(). Winforms auto-generates those names so it has the burden to ensure that the names it generates don't collide with names of windows in other processes and appdomains. Which is why you see these bizarro names, the most important part is the last bit, 39cfeeb in your example, the value returned by AppDomain.GetHashCode(). You cannot retrieve that hash code from an external process. 
You'll need a fundamentally different approach that doesn't rely on the easily obtainable class name. Look at the Managed Spy code, it supports using Reflection on an external Winforms process. Isolating the DLL injection code technique it uses so you can use this yourself in your own code takes some work. 
Also the only way you'll ever get the .NET class name out of the process, something you otherwise never really care about when using UI automation.

命名空间'std'中的错误'underlying_type_t'没有在project-OSRM中的example.cpp中命名模板类型(error ‘underlying_type_t’ in namespace ‘std’ does not name a template type in example.cpp from project-OSRM)

最满意答案

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