WhenN.h

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/*
 * Copyright 2014-present Facebook, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#pragma once

#include <iterator>
#include <memory>
#include <type_traits>
#include <utility>
#include <vector>

#include <folly/functional/Invoke.h>

namespace folly {
namespace fibers {

template <class InputIterator>
typename std::vector<
    typename std::enable_if<
        !std::is_same<
            invoke_result_t<
                typename std::iterator_traits<InputIterator>::value_type>,
            void>::value,
        typename std::pair<
            size_t,
            invoke_result_t<
                typename std::iterator_traits<InputIterator>::value_type>>>::
        type> inline collectN(InputIterator first, InputIterator last, size_t n);

template <class InputIterator>
typename std::enable_if<
    std::is_same<
        invoke_result_t<
            typename std::iterator_traits<InputIterator>::value_type>,
        void>::value,
    std::vector<size_t>>::
    type inline collectN(InputIterator first, InputIterator last, size_t n);

template <class InputIterator>
typename std::vector<
    typename std::enable_if<
        !std::is_same<
            invoke_result_t<
                typename std::iterator_traits<InputIterator>::value_type>,
            void>::value,
        invoke_result_t<
            typename std::iterator_traits<InputIterator>::value_type>>::
        type> inline collectAll(InputIterator first, InputIterator last);

template <class InputIterator>
typename std::enable_if<
    std::is_same<
        invoke_result_t<
            typename std::iterator_traits<InputIterator>::value_type>,
        void>::value,
    void>::type inline collectAll(InputIterator first, InputIterator last);

template <class InputIterator>
typename std::enable_if<
    !std::is_same<
        invoke_result_t<
            typename std::iterator_traits<InputIterator>::value_type>,
        void>::value,
    typename std::pair<
        size_t,
        invoke_result_t<
            typename std::iterator_traits<InputIterator>::value_type>>>::
    type inline collectAny(InputIterator first, InputIterator last);

template <class InputIterator>
typename std::enable_if<
    std::is_same<
        invoke_result_t<
            typename std::iterator_traits<InputIterator>::value_type>,
        void>::value,
    size_t>::type inline collectAny(InputIterator first, InputIterator last);
} // namespace fibers
} // namespace folly

#include <folly/fibers/WhenN-inl.h>