Clang3.6版本的Checker
一，Clang源码如下：
template <typename CHECK1, typename CHECK2=check::_VoidCheck,
typename CHECK3=check::_VoidCheck, typename CHECK4=check::_VoidCheck,
typename CHECK5=check::_VoidCheck, typename CHECK6=check::_VoidCheck,
typename CHECK7=check::_VoidCheck, typename CHECK8=check::_VoidCheck,
typename CHECK9=check::_VoidCheck, typename CHECK10=check::_VoidCheck,
typename CHECK11=check::_VoidCheck,typename CHECK12=check::_VoidCheck,
typename CHECK13=check::_VoidCheck,typename CHECK14=check::_VoidCheck,
typename CHECK15=check::_VoidCheck,typename CHECK16=check::_VoidCheck,
typename CHECK17=check::_VoidCheck,typename CHECK18=check::_VoidCheck,
typename CHECK19=check::_VoidCheck,typename CHECK20=check::_VoidCheck,
typename CHECK21=check::_VoidCheck,typename CHECK22=check::_VoidCheck,
typename CHECK23=check::_VoidCheck,typename CHECK24=check::_VoidCheck>
class Checker;
template <>
class Checker<check::_VoidCheck>
: public CheckerBase
{
virtual void anchor();
public:
static void _register(void *checker, CheckerManager &mgr) { }
};
template <typename CHECK1, typename CHECK2, typename CHECK3, typename CHECK4,
typename CHECK5, typename CHECK6, typename CHECK7, typename CHECK8,
typename CHECK9, typename CHECK10,typename CHECK11,typename CHECK12,
typename CHECK13,typename CHECK14,typename CHECK15,typename CHECK16,
typename CHECK17,typename CHECK18,typename CHECK19,typename CHECK20,
typename CHECK21,typename CHECK22,typename CHECK23,typename CHECK24>
class Checker
: public CHECK1,
public Checker<CHECK2, CHECK3, CHECK4, CHECK5, CHECK6, CHECK7,
CHECK8, CHECK9, CHECK10,CHECK11,CHECK12,CHECK13,
CHECK14,CHECK15,CHECK16,CHECK17,CHECK18,CHECK19,
CHECK20,CHECK21,CHECK22,CHECK23,CHECK24> {
public:
template <typename CHECKER>
static void _register(CHECKER *checker, CheckerManager &mgr) {
CHECK1::_register(checker, mgr);
Checker<CHECK2, CHECK3, CHECK4, CHECK5, CHECK6, CHECK7,
CHECK8, CHECK9, CHECK10,CHECK11,CHECK12,CHECK13,
CHECK14,CHECK15,CHECK16,CHECK17,CHECK18,CHECK19,
CHECK20,CHECK21,CHECK22,CHECK23,CHECK24>::_register(checker, mgr);
}
};
二，模拟实现Checker
头文件
/********************************
*
* Author : szyu
*
* Date : 2016.12.27
*
********************************/
#ifndef __SZYU_CLANG__
#define __SZYU_CLANG__
#include <iostream>
class DefaultClass
{
public:
static void
_register()
{
std::cout << "In DefaultClass::_register()" << std::endl;
}
};
class FunctionClass1
{
public:
static void
_register()
{
std::cout << "In FunctionClass1::_register()" << std::endl;
}
};
class FunctionClass2
{
public:
static void
_register()
{
std::cout << "In FunctionClass2::_register()" << std::endl;
}
};
class FunctionClass3
{
public:
static void
_register()
{
std::cout << "In FunctionClass3::_register()" << std::endl;
}
};
template <typename T1, typename T2 = DefaultClass, typename T3 = DefaultClass>
class Checker;
template <>
class Checker<DefaultClass>
{
public:
static void
_register()
{
std::cout << "In Checker<DefaultClass>::_register()" << std::endl;
DefaultClass::_register();
}
};
template <typename T1, typename T2, typename T3>
class Checker : public T1, public Checker<T2, T3>
{
public:
static void
_register()
{
std::cout << "In Checker<T1, T2, T3>::_register()" << std::endl;
T1::_register();
Checker<T2, T3>::_register();
}
};
#endif
测试用例
/********************************
*
* Author : szyu
*
* Date : 2016.12.27
*
********************************/
#include "register.h"
void
test1()
{
typedef Checker<DefaultClass> Checker1;
Checker1::_register();
std::cout << "=====================" << std::endl;
typedef Checker<FunctionClass1> Checker2;
Checker2::_register();
std::cout << "=====================" << std::endl;
typedef Checker<FunctionClass1, FunctionClass2> Checker3;
Checker3::_register();
std::cout << "=====================" << std::endl;
typedef Checker<FunctionClass1, FunctionClass2, FunctionClass3> Checker4;
Checker4::_register();
std::cout << "=====================" << std::endl;
}
int
main( int argc, char *argv[] )
{
test1();
return 0;
}
执行结果
时间： 2024-08-06 11:57:24