54 lines
1.4 KiB
C++
54 lines
1.4 KiB
C++
|
#include <iostream>
|
||
|
|
#include <sstream>
|
||
|
|
|
||
|
|
template<typename ...Args>
|
||
|
|
void print(const Args&...args){
|
||
|
|
std::stringstream ss;
|
||
|
|
((ss<<args),...);
|
||
|
|
std::cout<<ss.str();
|
||
|
|
}
|
||
|
|
|
||
|
|
template<typename T>
|
||
|
|
class Range{
|
||
|
|
private:
|
||
|
|
T _start,_end,_step;
|
||
|
|
public:
|
||
|
|
constexpr Range()=delete;
|
||
|
|
constexpr Range(const T start,const T end,const T step)noexcept:_start(start),_end(end),_step(step){}
|
||
|
|
constexpr Range(const T start,const T end)noexcept:Range(start,end,1){}
|
||
|
|
constexpr Range(const T end)noexcept:Range(1,end,1){}
|
||
|
|
|
||
|
|
struct Iterator{
|
||
|
|
T current,step;
|
||
|
|
constexpr Iterator()=delete;
|
||
|
|
constexpr Iterator(const T start,const T step)noexcept:current(start),step(step){}
|
||
|
|
constexpr bool operator!=(const Iterator &other)const noexcept{
|
||
|
|
return current<other.current;
|
||
|
|
}
|
||
|
|
constexpr Iterator& operator++()noexcept{
|
||
|
|
current+=step;
|
||
|
|
return *this;
|
||
|
|
}
|
||
|
|
constexpr T operator*()const noexcept{
|
||
|
|
return current;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
constexpr Iterator begin(){
|
||
|
|
return Iterator(_start,_step);
|
||
|
|
}
|
||
|
|
constexpr Iterator end(){
|
||
|
|
return Iterator(_end,_step);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
int main(const int argc,const char* argv[]){
|
||
|
|
for(auto i:Range(1,11,2)){
|
||
|
|
for(auto j:Range(1,11,2)){
|
||
|
|
print("[","i: ",i," ,j: ",j,"] ");
|
||
|
|
}
|
||
|
|
print("\n");
|
||
|
|
}
|
||
|
|
print("\n");
|
||
|
|
}
|