boost :: priority_queue中的警告 [英] Warnings in boost::priority_queue

问题描述

当我尝试构建"priority_queue_example.cpp"时，会在声明我的priority_queue的行上收到指向"priority_queue_example.h"的警告(以及类似的错误).警告是

When I try to build "priority_queue_example.cpp" it get these warnings(and so errors) pointing to "priority_queue_example.h" on the line where my priority_queue is declared. The warnings are,

1>  priority_queue_example.cpp
1>c:\Projects\lib\boost\boost\heap\detail\stable_heap.hpp(102): error C2220: warning treated as error - no 'object' file generated
1>c:\Projects\lib\boost\boost\heap\detail\stable_heap.hpp(102): warning 
C4100: 'rhs' : unreferenced formal parameter
1>          c:\Projects\lib\boost\boost\heap\detail\stable_heap.hpp(102) : while compiling class template member function 'boost::heap::detail::size_holder<false,size_t>::size_holder(const boost::heap::detail::size_holder<false,size_t> &)'
1>          c:\Projects\lib\boost\boost\heap\detail\stable_heap.hpp(189) : see reference to function template instantiation 'boost::heap::detail::size_holder<false,size_t>::size_holder(const boost::heap::detail::size_holder<false,size_t> &)' being compiled
1>          c:\Projects\lib\boost\boost\heap\detail\stable_heap.hpp(151) : see reference to class template instantiation 'boost::heap::detail::size_holder<false,size_t>' being compiled
1>          c:\Projects\lib\boost\boost\heap\priority_queue.hpp(65) : see reference to class template instantiation 'boost::heap::detail::heap_base<T,myObjectPtrCompare,false,unsigned __int64,false>' being compiled
1>          with
1>          [
1>              T=myObject *
1>          ]
1>          c:\Projects\priority_queue_example.h(193) : see reference to class template instantiation 'boost::heap::priority_queue<myObject *,boost::heap::compare<myObjectPtrCompare>,boost::parameter::void_,boost::parameter::void_,boost::parameter::void_>' being compiledcompare<ObjectPtrCompare>,boost::parameter::void_,boost::parameter::void

我的priority_queue被声明为

My priority_queue is declared as,

mutable boost::heap::priority_queue<myObject*, boost::heap::compare<myObjectPtrCompare> > hp;

我不确定这是什么意思.我可以解决这个问题吗?

I'm not sure what this means. Can I fix this?

这是我定义的比较类，

struct myObjectPtrCompare
{   
    bool operator()(const myObject* lhs, const myObject* rhs) const
    {
        return (lhs->getProp() < rhs->getProp());
    }
};

推荐答案

在/W4中，Boost并非没有警告.这意味着即使您的代码是corect，也可能会有虚假的警告.

Boost is not warning-free with /W4. That means that there could be spurious warnings, even if your code is corect.

您可以按照本文中的说明禁用特定的警告:

You can disable specific warnings as specified in this article: https://docs.microsoft.com/en-us/visualstudio/ide/how-to-suppress-compiler-warnings

1. 在解决方案资源管理器中，选择要在其中禁止显示警告的项目或源文件.

1. In Solution Explorer, choose the project or source file in which you want to suppress warnings.

在菜单栏上，选择视图"，属性页".

On the menu bar, choose View, Property Pages.

选择配置属性"类别，选择"C/C ++"类别，然后选择高级"页面.

Choose the Configuration Properties category, choose the C/C++ category, and then choose the Advanced page.

执行以下步骤之一:

• 在禁用特定警告"框中，指定要禁止显示的警告的错误代码，以分号分隔.

• In the Disable Specific Warnings box, specify the error codes of the warnings that you want to suppress, separated by a semicolon.

在禁用特定警告"框中，选择编辑"以显示更多选项.

In the Disable Specific Warnings box, choose Edit to display more options.

选择确定"按钮，然后重新构建解决方案.

Choose the OK button, and then rebuild the solution.

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