协议按名字分文件打印-c++ typeid RTTI运行时识别

可以根据基类的指针，打印出运行时实际所指向子类的名字。

关于 Demangling 参考
http://gcc.gnu.org/onlinedocs/libstdc++/manual/ext_demangling.html

#include <cxxabi.h>
#include <iostream>
using namespace std;

class CProtoNameBase
{
public:
virtual void Print(){cout<<"Base"<<endl;};
};

class CProtoNameA:public CProtoNameBase
{

void Print() { cout<<"NameA"<<endl;};
};

class CProtoNameB:public CProtoNameBase
{
void Print(){cout<<"NameB"<<endl;}
};

void print_proto_name( CProtoNameBase *proto)
{
const std::type_info &ti = typeid( *proto);
int status = 0;

char *szProtoName = abi::__cxa_demangle( ti.name(),0,0,&status);

cout<<"ti.name:"<<ti.name()<<" after demangle:"<< szProtoName<<endl;

free(szProtoName);
}
void rtti_test()
{
CProtoNameBase *proto1 = new CProtoNameA();
CProtoNameBase *proto2 = new CProtoNameB();

print_proto_name( proto1);
print_proto_name( proto2);
}

int main()
{
rtti_test();
return 0;
}

运行结果
ti.name:11CProtoNameA after demangle:CProtoNameA

ti.name:11CProtoNameB after demangle:CProtoNameB