Ｃ＋＋语法游戏
游戏而已，，可以用来锻炼脑筋。。~~//using.h#pragma once//for IUnknown#include "atlbase.h"#define USING_SCOPE_ASSERT(x) ATLASSERT(x);#define USING_SCOPE_INLINE inline#define Using(expression) if(UsingScope UsingScope_LocalVar=(expression))class UsingScope{ class Container { public: virtual ~Container() { } }; Container* pc;public: USING_SCOPE_INLINE operator bool () { return true; } USING_SCOPE_INLINE ~UsingScope() { delete pc; } template class SimplePointerContainer:public Container { T* p; public: SimplePointerContainer(T* p) { USING_SCOPE_ASSERT(p!=NULL); this->p=p; } virtual ~SimplePointerContainer() { delete p; } }; template USING_SCOPE_INLINE UsingScope(T* p) { pc=new SimplePointerContainer(p); } class IUnknownContainer:public Container { IUnknown* punk; public: IUnknownContainer(IUnknown* punk) { USING_SCOPE_ASSERT(punk!=NULL); this->punk=punk; } virtual ~IUnknownContainer() { punk->Release(); } }; USING_SCOPE_INLINE UsingScope(IUnknown* punk) { pc=new IUnknownContainer(punk); } class BSTRContainer:public Container { BSTR bstr; public: BSTRContainer(BSTR bstr) { USING_SCOPE_ASSERT(bstr!=NULL); this->bstr=bstr; } virtual ~BSTRContainer() { SysFreeString(bstr); } }; USING_SCOPE_INLINE UsingScope(BSTR bstr) { pc=new BSTRContainer(bstr); } //vc7 m 可以为System::IDisposable* 添加 .Dispose() 的调用 //以支持所有的dotnet System::IDisposable的实现者};//usingT.h#include "Using.h"#define UsingT(type,varname,expression) if(UsingScopeT varname=(expression))templateclass UsingScopeT{ template class Container { public: T* p; Container(T* p) { USING_SCOPE_ASSERT(p!=NULL); this->p=p; } virtual ~Container(){} }; Container* pc;public: USING_SCOPE_INLINE operator bool () { return true; } USING_SCOPE_INLINE T* operator -> () { return (pc->p); } USING_SCOPE_INLINE operator T*() const { return (T*)(pc->p); } USING_SCOPE_INLINE T& operator*() const { return *(pc->p); } USING_SCOPE_INLINE T** operator&() { return &(pc->p); } USING_SCOPE_INLINE bool operator==(T* pT) const { return (pc->p) == pT; } USING_SCOPE_INLINE ~UsingScopeT() { delete pc; } template class SimplePointerContainer:public Container { public: SimplePointerContainer(T* p):Container(p) { } virtual ~SimplePointerContainer() { delete p; } }; template USING_SCOPE_INLINE UsingScopeT(T* p) { pc=new SimplePointerContainer(p); } class IUnknownContainer:public Container { public: IUnknownContainer(IUnknown* punk):Container(punk) { } virtual ~IUnknownContainer() { p->Release(); } }; USING_SCOPE_INLINE UsingScopeT(IUnknown* punk) { pc=new IUnknownContainer(punk); } class BSTRContainer:public Container { public: BSTRContainer(BSTR bstr):Container(bstr) { } virtual ~BSTRContainer() { SysFreeString(p); } }; USING_SCOPE_INLINE UsingScopeT(BSTR bstr) { pc=new BSTRContainer(bstr); } //vc7 m 可以为System::IDisposable* 添加 .Dispose() 的调用 //以支持所有的dotnet System::IDisposable的实现者};//Using.Cpp// Using.cpp : Defines the entry point for the console application.//#include "stdafx.h"#include "atlbase.h"#include "Using.h"#include "UsingT.h"class ClassA{public: ClassA() { _tprintf(_T("ClassA()\n")); } virtual ~ClassA() { _tprintf(_T("~ClassA()\n")); } virtual void Write() { _tprintf(_T("ClassA::Write\n")); }};class ClassB:public ClassA{public: virtual void Write() { _tprintf(_T("ClassB::Write\n")); }};ClassA* CreateClassA(){ return new ClassB();}IUnknown* ReturnUnknown(){ HRESULT hres; IUnknown* p; CLSID cid; hres=CLSIDFromProgID(L"JScript",&cid); hres=CoGetClassObject(cid,CLSCTX_INPROC_SERVER,NULL,IID_IClassFactory,(void**)&p); return p;}void DoIt(){ CoInitialize(NULL); IUnknown* punk; Using(punk=ReturnUnknown()) { ClassA* pa; Using(pa=CreateClassA()) { _tprintf(_T("DoWork\n")); pa->Write(); } } UsingT(ClassB,pb,new ClassB()) { pb->Write(); ClassA* pa=pb; if(pa==pb) pa->Write(); } UsingT(IUnknown,p,ReturnUnknown()) { //p->.. } CoUninitialize();}int main(int argc, char* argv[]){ DoIt(); return 0;} 相关文章：
<SCRIPT language=javascript src=\"js/textadd.js\">
</script>
==================
重新排版(野比)
//using.h
#pragma once
//for IUnknown
#include \"atlbase.h\"
#define USING_SCOPE_ASSERT(x) ATLASSERT(x);
#define USING_SCOPE_INLINE inline
#define Using(expression) if(UsingScope UsingScope_LocalVar=(expression))
class UsingScope{
class Container {
public:
virtual ~Container() { }
};
Container* pc;
public:
USING_SCOPE_INLINE operator bool () {
return true;
}
USING_SCOPE_INLINE ~UsingScope() {
delete pc;
}
template class SimplePointerContainer:public Container {
T* p;
public:
SimplePointerContainer(T* p) {
USING_SCOPE_ASSERT(p!=NULL);
this->p=p;
}
virtual ~SimplePointerContainer() {
delete p;
}
};
template USING_SCOPE_INLINE UsingScope(T* p) {
pc=new SimplePointerContainer(p);
}
class IUnknownContainer:public Container {
IUnknown* punk;
public:
IUnknownContainer(IUnknown* punk) {
USING_SCOPE_ASSERT(punk!=NULL);
this->punk=punk;
}
virtual ~IUnknownContainer() {
punk->Release();
}
};
USING_SCOPE_INLINE UsingScope(IUnknown* punk) {
pc=new IUnknownContainer(punk);
}
class BSTRContainer:public Container {
BSTR bstr;
public:
BSTRContainer(BSTR bstr) {
USING_SCOPE_ASSERT(bstr!=NULL);
this->bstr=bstr;
}
virtual ~BSTRContainer() {
SysFreeString(bstr);
}
};
USING_SCOPE_INLINE UsingScope(BSTR bstr) {
pc=new BSTRContainer(bstr);
}
//vc7 m 可以为System::IDisposable* 添加 .Dispose() 的调用
//以支持所有的dotnet System::IDisposable的实现者};
//usingT.h
#include \"Using.h\"
#define UsingT(type,varname,expression) if(UsingScopeT varname=(expression))
template class UsingScopeT{
template class Container {
public:
T* p;
Container(T* p) {
USING_SCOPE_ASSERT(p!=NULL);
this->p=p;
}
virtual ~Container(){} };
Container* pc;
public:
USING_SCOPE_INLINE operator bool () {
return true;
}
USING_SCOPE_INLINE T* operator -> () {
return (pc->p);
}
USING_SCOPE_INLINE operator T*() const {
return (T*)(pc->p);
}
USING_SCOPE_INLINE T& operator*() const {
return *(pc->p);
}
USING_SCOPE_INLINE T** operator&() {
return &(pc->p);
}
USING_SCOPE_INLINE bool operator==(T* pT) const {
return (pc->p) == pT;
}
USING_SCOPE_INLINE ~UsingScopeT() {
delete pc;
}
template class SimplePointerContainer:public Container {
public:
SimplePointerContainer(T* p):Container(p) { }
virtual ~SimplePointerContainer() {
delete p;
}
};
template USING_SCOPE_INLINE UsingScopeT(T* p) {
pc=new SimplePointerContainer(p);
}
class IUnknownContainer:public Container {
public:
IUnknownContainer(IUnknown* punk):Container(punk) { }
virtual ~IUnknownContainer() {
p->Release();
}
};
USING_SCOPE_INLINE UsingScopeT(IUnknown* punk) {
pc=new IUnknownContainer(punk);
}
class BSTRContainer:public Container {
public:
BSTRContainer(BSTR bstr):Container(bstr) { }
virtual ~BSTRContainer() {
SysFreeString(p);
}
};
USING_SCOPE_INLINE UsingScopeT(BSTR bstr) {
pc=new BSTRContainer(bstr);
}
//vc7 m 可以为System::IDisposable* 添加 .Dispose() 的调用
//以支持所有的dotnet System::IDisposable的实现者};
//Using.Cpp
// Using.cpp : Defines the entry point for the console application.
#include \"stdafx.h\"
#include \"atlbase.h\"
#include \"Using.h\"
#include \"UsingT.h\"
class ClassA{
public:
ClassA() {
_tprintf(_T(\"ClassA()\n\"));
}
virtual ~ClassA() {
_tprintf(_T(\"~ClassA()\n\"));
}
virtual void Write() {
_tprintf(_T(\"ClassA::Write\n\"));
}
};
class ClassB:public ClassA{
public:
virtual void Write() {
_tprintf(_T(\"ClassB::Write\n\"));
}
};
ClassA* CreateClassA(){
return new ClassB();
}
IUnknown* ReturnUnknown(){
HRESULT hres;
IUnknown* p;
CLSID cid;
hres=CLSIDFromProgID(L\"JScript\",&cid);
hres=CoGetClassObject(cid,CLSCTX_INPROC_SERVER,NULL,IID_IClassFactory,(void**)&p);
return p;
}
void DoIt(){
CoInitialize(NULL);
IUnknown* punk;
Using(punk=ReturnUnknown()) {
ClassA* pa;
Using(pa=CreateClassA()) {
_tprintf(_T(\"DoWork\n\"));
pa->Write();
}
}
UsingT(ClassB,pb,new ClassB()) {
pb->Write();
ClassA* pa=pb;
if(pa==pb)
pa->Write();
}
UsingT(IUnknown,p,ReturnUnknown()) {
//p->.. } CoUninitialize();}int main(int argc, char* argv[]){ DoIt(); return 0;}
排出来我也不知道是啥
[此贴子已经被野比于2007-10-10 19:43:43编辑过]
