DLL导出STL模板类和成员变量

// -------------------------------------------
// MYHEADER.H
//disable warnings on 255 char debug symbols
#pragma warning (disable : 4786)
//disable warnings on extern before template instantiation
#pragma warning (disable : 4231)

#include <vector>

// Provide the storage class specifier (extern for an .exe file, null
// for DLL) and the __declspec specifier (dllimport for .an .exe file,
// dllexport for DLL).
// You must define EXP_STL when compiling the DLL.
// You can now use this header file in both the .exe file and DLL - a
// much safer means of using common declarations than two different
// header files.
#ifdef EXP_STL
#    define DECLSPECIFIER __declspec(dllexport)
#    define EXPIMP_TEMPLATE
#else
#    define DECLSPECIFIER __declspec(dllimport)
#    define EXPIMP_TEMPLATE extern
#endif

// Instantiate classes vector<int> and vector<char>
// This does not create an object. It only forces the generation of all
// of the members of classes vector<int> and vector<char>. It exports
// them from the DLL and imports them into the .exe file.
EXPIMP_TEMPLATE template class DECLSPECIFIER std::vector<int>;
EXPIMP_TEMPLATE template class DECLSPECIFIER std::vector<char>;

// Declare/Define a class that contains both a static and non-static
// data member of an STL object.
// Note that the two template instantiations above are required for
// the data members to be accessible. If the instantiations above are
// omitted, you may experience an access violation.
// Note that since you are exporting a vector of MyClass, you must
// provide implementations for the operator < and the operator ==.
class DECLSPECIFIER MyClass
{
public:
std::vector<int> VectorOfInts;
static std::vector<char> StaticVectorOfChars;

public:
bool operator < (const MyClass > c) const
{
return VectorOfInts < c. VectorOfInts;
}
bool operator == (const MyClass > c) const
{
return VectorOfInts == c. VectorOfInts;
}
};

// Instantiate the class vector<MyClass>
// This does not create an object. It only forces the generation of
// all of the members of the class vector<MyClass>. It exports them
// from the DLL and imports them into the .exe file.
EXPIMP_TEMPLATE template class DECLSPECIFIER std::vector<MyClass>;

// -------------------------------------------
// Compile options needed: /GX /LDd /MDd /D"EXP_STL"
//                     or: /GX /LD  /MD  /D"EXP_STL"
// DLL.CPP

#include "MyHeader.h"
std::vector<char> MyClass::StaticVectorOfChars;

// -------------------------------------------
// Compile options needed: /GX /MDd
//                     or: /GX /MD
// EXE.CPP

#include <iostream>
#include "MyHeader.h"

int main ()
{
MyClass x;

for (int i=0; i<5; i++) x.VectorOfInts.push_back(i);
for (char j=0; j<5; j++) x.StaticVectorOfChars.push_back('a' + j);

std::vector<int>::iterator vii = x.VectorOfInts.begin();
while (vii != x.VectorOfInts.end())
{
std::cout << *vii;
std::cout << " displayed from x.VectorOfInts" << std::endl;
vii++;
}
std::vector<char>::iterator vci = x.StaticVectorOfChars.begin();
while (vci != x.StaticVectorOfChars.end())
{
std::cout << *vci;
std::cout << " displayed from MyClass::StaticVectorOfChars";
std::cout << std::endl;
vci++;
}

std::vector<MyClass> vy;
for (i=0; i=5; i++) vy.push_back(MyClass());

return 1;
}