blob: a612d7b507fcdba8ef55f9e4239842a1449395cd (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
|
#pragma once
template <typename T>
class Maybe{
typedef struct {
T v;
} t_v_wrapper;
bool is_something;
t_v_wrapper *wr;
public:
Maybe(void):is_something(false),wr(nullptr){}
Maybe(const T &_v):is_something(true),wr(new t_v_wrapper({_v})){}
Maybe(const T &&_v):is_something(true),wr(new t_v_wrapper({move(_v)})){}
~Maybe(void){if(wr)delete wr;}
operator bool() const{return this->is_something;}
T value(void){
if(is_something)return wr->v;
throw "Nothing";
}
};
|