包括STL头文件中的问题 [英] Problem in including STL header files
问题描述
我在MFC(VS 2008)中创建了基于Dialog的应用程序。当我在Dlg.cpp中执行#include时,显示以下错误。
I have created Dialog Based application in MFC (VS 2008).When I do "#include" in Dlg.cpp it showing following error.
在VS 2008安装中缺少
Is Some Component is missing in the VS 2008 Installation
c:\program files (x86)\microsoft visual studio 9.0\vc\include\xmemory(43) :
error C2665: 'operator new' : none of the 5 overloads could convert all the argument types
1> c:\program files (x86)\microsoft visual studio 9.0\vc\include\new.h(85): could be 'void *operator new(size_t,const std::nothrow_t &) throw()'
1> c:\program files (x86)\microsoft visual studio 9.0\vc\include\new.h(93): or 'void *operator new(size_t,void *)'
1> while trying to match the argument list '(const char [70], int)'
1> c:\program files (x86)\microsoft visual studio 9.0\vc\include\xmemory(145) : see reference to function template instantiation '_Ty *std::_Allocate<char>(size_t,_Ty *)' being compiled
1> with
1> [
1> _Ty=char
1> ]
1> c:\program files (x86)\microsoft visual studio 9.0\vc\include\xmemory(144) : while compiling class template member function 'char *std::allocator<_Ty>::allocate(std::allocator<_Ty>::size_type)'
1> with
1> [
1> _Ty=char
1> ]
1> c:\program files (x86)\microsoft visual studio 9.0\vc\include\xstring(2216) : see reference to class template instantiation 'std::allocator<_Ty>' being compiled
1> with
1> [
1> _Ty=char
1> ]
1>Build log was saved at "file://c:\Users\Public\Documents\Proj\STL1\STL1\Debug\BuildLog.htm"
1>STL1 - 1 error(s), 0 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
推荐答案
STL包括在您的MFC项目中应该包括在DEBUG_NEW的定义之前。这是一个过去的问题(不再似乎是,因为我不能在VS 2010中重现它)。
Any STL includes in your MFC project should be included prior to the definition of DEBUG_NEW. This was a problem in the past (no longer seems to be, as I cannot reproduce it in VS 2010).
// myfile.cpp
#ifdef _DEBUG
#define new DEBUG_NEW
#endif
// This will cause the error
#include <vector>
鉴于
// myfile.cpp
// will work OK
#include <vector>
#ifdef _DEBUG
#define new DEBUG_NEW
#endif
$ b b
DEBUG_NEW
是一个微软专用扩展,有助于在应用程序的调试版本中查找内存泄漏。
DEBUG_NEW
is a microsoft specific extension that helps to find memory leaks in debug versions of the application. It can be very useful in certain cases.
在afx.h中定义为:
It's defined in afx.h as:
void* AFX_CDECL operator new(size_t nSize, LPCSTR lpszFileName, int nLine);
#define DEBUG_NEW new(THIS_FILE, __LINE__)`
这有助于追踪记忆分配,并且当检测到泄漏时将给您分配发生的文件和行号。
It's helps to provide tracking of memory allocated and when a leak is detected will give you the file and line number where the allocation took place.
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