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#ifndef INCLUDED_RECURSIVE_
#define INCLUDED_RECURSIVE_
#include "../../promisebase/promisebase.h"
class Recursive
{
class State: public PromiseBase<Recursive, State>
{
using Handle = std::coroutine_handle<State>;
size_t d_level;
size_t d_value;
public:
State(size_t level);
static std::suspend_always initial_suspend();
std::suspend_always yield_value(size_t value);
size_t value() const;
size_t level() const;
};
public:
using Handle = std::coroutine_handle<State>;
private:
Handle d_handle;
public:
using promise_type = State;
//iter
class Iterator
{
friend bool operator==(Iterator const &lhs, Iterator const &rhs);
friend class Recursive;
Handle d_handle;
public:
Iterator &operator++();
size_t operator*() const;
private:
Iterator(Handle handle);
};
//=
explicit Recursive(std::coroutine_handle<State> handle);
~Recursive();
bool next(size_t *value);
void resume();
Iterator begin();
Iterator end();
};
inline bool operator==(Recursive::Iterator const &lhs,
Recursive::Iterator const &rhs)
{
return lhs.d_handle.address() == rhs.d_handle.address();
}
inline Recursive::Recursive(std::coroutine_handle<State> handle)
:
d_handle(handle)
{}
#endif
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