2  * Copyright (c) 2021 Huawei Device Co., Ltd.
67 template <typename C>
68 auto LazyFetch(C &c)  in LazyFetch()  argument
70 …return [end = c.end(), it = c.begin()]() mutable -> std::optional<std::decay_t<decltype(*(c.begin(…  in LazyFetch()
78 template <typename C>
79 auto LazyFetch(const C &c)  in LazyFetch()  argument
81 …return [end = c.end(), it = c.begin()]() mutable -> std::optional<std::decay_t<decltype(*(c.begin(…  in LazyFetch()
89 template <typename C>
90 auto ConstLazyFetch(const C &c)  in ConstLazyFetch()  argument
92 …return [cend = c.cend(), it = c.cbegin()]() mutable -> std::optional<std::decay_t<decltype(*(c.cbe…  in ConstLazyFetch()
100 template <typename C>
101 auto RefLazyFetch(C &c)  in RefLazyFetch()  argument
103 …return [end = c.end(), it = c.begin()]() mutable -> std::optional<decltype(std::ref(*(c.begin())))…  in RefLazyFetch()
111 template <typename C>
112 auto RefConstLazyFetch(const C &c)  in RefConstLazyFetch()  argument
114 …return [cend = c.cend(), it = c.cbegin()]() mutable -> std::optional<decltype(std::cref(*(c.cbegin…  in RefConstLazyFetch()
152 template <typename C>
153 auto IndicesOf(const C &c)  in IndicesOf()  argument
156     size_t to = c.size();  in IndicesOf()
269 template <typename C, typename S>
270 C ContainerOf(S stream, typename std::decay<decltype(
271                             (*static_cast<C *>(nullptr))
276     C c;  variable
278         c.push_back(*val);
280     return c;
283 template <typename C, typename S>
284 C ContainerOf(
287         (*static_cast<C *>(nullptr))
292     C c;  variable
294         c.insert(*val);
296     return c;