2  * Copyright (c) 2021-2022 Huawei Device Co., Ltd.
66 template <typename C>
67 auto LazyFetch(C &c)  in LazyFetch()  argument
69 …return [end = c.end(), it = c.begin()]() mutable -> std::optional<std::decay_t<decltype(*(c.begin(…  in LazyFetch()
77 template <typename C>
78 auto LazyFetch(const C &c)  in LazyFetch()  argument
80 …return [end = c.end(), it = c.begin()]() mutable -> std::optional<std::decay_t<decltype(*(c.begin(…  in LazyFetch()
88 template <typename C>
89 auto ConstLazyFetch(const C &c)  in ConstLazyFetch()  argument
91 …return [cend = c.cend(), it = c.cbegin()]() mutable -> std::optional<std::decay_t<decltype(*(c.cbe…  in ConstLazyFetch()
99 template <typename C>
100 auto RefLazyFetch(C &c)  in RefLazyFetch()  argument
102 …return [end = c.end(), it = c.begin()]() mutable -> std::optional<decltype(std::ref(*(c.begin())))…  in RefLazyFetch()
110 template <typename C>
111 auto RefConstLazyFetch(const C &c)  in RefConstLazyFetch()  argument
113 …return [cend = c.cend(), it = c.cbegin()]() mutable -> std::optional<decltype(std::cref(*(c.cbegin…  in RefConstLazyFetch()
151 template <typename C>
152 auto IndicesOf(const C &c)  in IndicesOf()  argument
155     size_t to = c.size();  in IndicesOf()
262 template <typename C, typename S>
263 C ContainerOf(S stream, typename std::decay<decltype(
264                             (*static_cast<C *>(nullptr))
269     C c;  variable
271         c.push_back(*val);
273     return c;
276 template <typename C, typename S>
277 C ContainerOf(
280         (*static_cast<C *>(nullptr))
285     C c;  variable
287         c.insert(*val);
289     return c;