In this example (extracted from
https://digitalmars.com/articles/b68.html), this works:
```
class C {
int a;
int foo(int i) { return i + a; }
}
auto mfp = (C self, int i)=>self.foo(i);
void main(){
auto c = new C;
assert( c.mfp(20)==20);
}
```
but this fails
```
class C {
int a;
int foo(int i) { return i + a; }
}
void main(){
auto mfp = (C self, int i)=>self.foo(i);
auto c = new C;
assert( c.mfp(20)==20);
}
```
onlineapp.d(9): Error: no property `mfp` for type `onlineapp.C`
I supossed that ```mfp(c,20)``` and ```c.mfp(20)``` should be
equivalent because UFCS in second example, but it is not... why?
