typedef BOOL (CObject::Connection)();

Question

typedef BOOL (CObject::*Connection)();typedef struct _tagCObjDbConnector
{
char *pszName;
Connection pConnector;
}DATASOURCEINFO;
DATASOURCEINFO CObjDbConnector::tagDbInfo[]=
{
{"ORACLE数据库",(Connection)&CObjDbConnector::OracleCreator},
{"SYBASE数据库",(Connection)&CObjDbConnector::SybaseCreator},
{"SQL Server数据库",(Connection)&CObjDbConnector::SQLServerCreator},
{"Microsoft ACCESS数据库",(Connection)&CObjDbConnector::AccessCreator},
{"Microsoft Excel文件",(Connection)&CObjDbConnector::ExcelCreator},
{"Microsoft Foxpro数据表",(Connection)&CObjDbConnector::DbfCreator},
{"其他...",(Connection)&CObjDbConnector::GeneralCreator},
{NULL,NULL}
}; 上述代码的设计思想？

Answer 1

用于实现 builder pattern ?那个 tagDbInfo 看上去类似于 MFC 的 Message Map

Answer 2

typedef BOOL (CObject::*Connection)();
这个定义是如何理解？

Answer 3

定义Connection为指向BOOL CObject::Func()的指针。
只有CObject派生的类的BOOL CDerived::Func1()可以转换。