Works with arbitrary containers, std::vector<T> by default
Implemnted Expressions:
- Select
- Take
- GroupBy
- OrderBy
- Flatten
- Where
- Recurrent expression
"First 5 numbers in Fibonacci sequence divisible by 3, squared if even" example:
struct FibState {
int current;
int prev;
} starting {1, 0};
for(auto v: RecurrentContainer< FibState >([](const FibState st){
return FibState{st.current+st.prev, st.current};
}, starting)
.Select<int>([](const FibState st){ return st.current; })
.Where([](const int x){ return x%3 == 0; })
.Select<int>([](const int x) {
return x%2 == 0 ? x*x : x;
})
.Take(5))
{
std::cout << v << std::endl;
}
A bit ugly? Probably, but this is what a proof of concept for.
Moved from private study repository