cpp-lazy-stream/include/stream/to.h

//
//  to.h
//  stream
//
//  Created by Sam Jaffe on 3/29/23.
//

#pragma once

#include <map>
#include <set>
#include <vector>

#include <stream/common_view.h>
#include <stream/forward.h>

#define FWD(x) std::forward<decltype(x)>(x)

namespace stream::ranges {
template <typename C> class store {
private:
  C & to_;

public:
  store(C & to) : to_(to) {}

  template <typename Stream>
  friend void operator|(Stream && stream, store && store) {
    store.to_.emplace(store.to_.end(), stream.begin(), stream.end());
  }
};

template <template <typename...> class C> struct to_range {
  template <typename Stream> friend auto operator|(Stream && stream, to_range) {
    if constexpr (traits::is_sentinal_v<Stream>) {
      common_view common(FWD(stream));
      return C(common.begin(), common.end());
    } else {
      return C(stream.begin(), stream.end());
    }
  }
};

template <template <typename...> class C> auto to() { return to_range<C>(); }
inline auto to_vector() { return to<std::vector>(); }
inline auto to_map() { return to<std::map>(); }
inline auto to_set() { return to<std::set>(); }
}

#undef FWD