在32位编译器中使用/ Wp64警告。但没有64位编译器警告（配置） [英] Warning with /Wp64 in 32 bit compiler. But no warnings with 64bit compiler(config)

问题描述

HI，

对于以下代码，我在启用/ Wp64的32位编译器中收到警告。使用VS2013版本。

但在64位编译器中没有警告。为什么？

  &NBSP; &NBSP; &NBSP; &NBSP;的std ::矢量<短>我的列表;  

  &NBSP; &NBSP; &NBSP;   std :: ostringstream logMsg;

  &NBSP; &NBSP; &NBSP;   logMsg<< "显示" <<   mylist.size（）<< "结果。";

  &NBSP; &NBSP; &NBSP;   m_logger-> logMsg（logMsg.str（））;

发出警告

"警告C4267：'参数'：转换自'size_t'到'unsigned int'，可能丢失数据"

解决方案

&NBSP; &NBSP; &NBSP; &NBSP; &NBSP;

您好，

   

我正在将c ++应用程序从32位移植到64位。 vs2013。我必须为两个配置维护相同的代码。

对于下面的代码，我在启用/ Wp64的32位编译器中收到警告。但64位编译器没有警告。为什么？

  &NBSP; &NBSP; &NBSP; &NBSP;的std ::矢量<短>我的列表;  

  &NBSP; &NBSP; &NBSP; &NBSP; ... // mylist可能包含大量元素，可能大于int size

  &NBSP; &NBSP; &NBSP;   std :: ostringstream logMsg;

  &NBSP; &NBSP; &NBSP;   logMsg<< "显示" <<   mylist.size（）<< "结果。";

  &NBSP; &NBSP; &NBSP;   m_logger-> logMsg（logMsg.str（））;

发出警告

"警告C4267：'参数'：转换自'size_t'到'unsigned int'，可能丢失数据"

请帮我解决这个警告（mylist可以使用大量的元素，大于int大小）。似乎是ostringstream运算符<<不接受size_t（64位配置时为64位）

谢谢，Uralsib

HI ,

For the below code, i am getting warning , in 32 bit compiler with /Wp64 enabled. Using VS2013 version.

But no warning in 64 bit compiler. Why?

         std::vector<short> mylist;  

         std::ostringstream logMsg;
         logMsg << "showing " <<  mylist.size() << " results.";
         m_logger->logMsg(logMsg.str());

Giving warning

"warning C4267: 'argument' : conversion from 'size_t' to 'unsigned int', possible loss of data"

解决方案

         

Hi,

   

I am porting c++ application from 32 to 64 bit. vs2013 . I have to maintain same code for both configuratios.

For the below code, i am getting warning , in 32 bit compiler with /Wp64 enabled. But no warning in 64 bit compiler. Why?

         std::vector<short> mylist;  

          ...// mylist may pouplate with large number of elments , may be larger than int size

         std::ostringstream logMsg;
         logMsg << "showing " <<  mylist.size() << " results.";
         m_logger->logMsg(logMsg.str());

Giving warning

"warning C4267: 'argument' : conversion from 'size_t' to 'unsigned int', possible loss of data"

Please help me to solve this warnings (mylist can pouplate with large number of elments , larger than int size). It seems ostringstream operator << not accepting size_t( which is 64 bit in case of 64bit configuration)

Thanks,Uralsib

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