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author | heretic <heretic@yandex-team.ru> | 2022-02-10 16:45:43 +0300 |
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committer | Daniil Cherednik <dcherednik@yandex-team.ru> | 2022-02-10 16:45:43 +0300 |
commit | 397cbe258b9e064f49c4ca575279f02f39fef76e (patch) | |
tree | a0b0eb3cca6a14e4e8ea715393637672fa651284 /contrib/restricted/abseil-cpp-tstring/y_absl/strings/internal/string_constant.h | |
parent | 43f5a35593ebc9f6bcea619bb170394ea7ae468e (diff) | |
download | ydb-397cbe258b9e064f49c4ca575279f02f39fef76e.tar.gz |
Restoring authorship annotation for <heretic@yandex-team.ru>. Commit 1 of 2.
Diffstat (limited to 'contrib/restricted/abseil-cpp-tstring/y_absl/strings/internal/string_constant.h')
-rw-r--r-- | contrib/restricted/abseil-cpp-tstring/y_absl/strings/internal/string_constant.h | 128 |
1 files changed, 64 insertions, 64 deletions
diff --git a/contrib/restricted/abseil-cpp-tstring/y_absl/strings/internal/string_constant.h b/contrib/restricted/abseil-cpp-tstring/y_absl/strings/internal/string_constant.h index b18e821b49..df4fc0357e 100644 --- a/contrib/restricted/abseil-cpp-tstring/y_absl/strings/internal/string_constant.h +++ b/contrib/restricted/abseil-cpp-tstring/y_absl/strings/internal/string_constant.h @@ -1,64 +1,64 @@ -// Copyright 2020 The Abseil Authors. -// -// 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 -// -// https://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. - -#ifndef ABSL_STRINGS_INTERNAL_STRING_CONSTANT_H_ -#define ABSL_STRINGS_INTERNAL_STRING_CONSTANT_H_ - -#include "y_absl/meta/type_traits.h" -#include "y_absl/strings/string_view.h" - -namespace y_absl { -ABSL_NAMESPACE_BEGIN -namespace strings_internal { - -// StringConstant<T> represents a compile time string constant. -// It can be accessed via its `y_absl::string_view value` static member. -// It is guaranteed that the `string_view` returned has constant `.data()`, -// constant `.size()` and constant `value[i]` for all `0 <= i < .size()` -// -// The `T` is an opaque type. It is guaranteed that different string constants -// will have different values of `T`. This allows users to associate the string -// constant with other static state at compile time. -// -// Instances should be made using the `MakeStringConstant()` factory function -// below. -template <typename T> -struct StringConstant { - static constexpr y_absl::string_view value = T{}(); - constexpr y_absl::string_view operator()() const { return value; } - - // Check to be sure `view` points to constant data. - // Otherwise, it can't be constant evaluated. - static_assert(value.empty() || 2 * value[0] != 1, - "The input string_view must point to constant data."); -}; - -template <typename T> -constexpr y_absl::string_view StringConstant<T>::value; // NOLINT - -// Factory function for `StringConstant` instances. -// It supports callables that have a constexpr default constructor and a -// constexpr operator(). -// It must return an `y_absl::string_view` or `const char*` pointing to constant -// data. This is validated at compile time. -template <typename T> -constexpr StringConstant<T> MakeStringConstant(T) { - return {}; -} - -} // namespace strings_internal -ABSL_NAMESPACE_END -} // namespace y_absl - -#endif // ABSL_STRINGS_INTERNAL_STRING_CONSTANT_H_ +// Copyright 2020 The Abseil Authors. +// +// 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 +// +// https://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. + +#ifndef ABSL_STRINGS_INTERNAL_STRING_CONSTANT_H_ +#define ABSL_STRINGS_INTERNAL_STRING_CONSTANT_H_ + +#include "y_absl/meta/type_traits.h" +#include "y_absl/strings/string_view.h" + +namespace y_absl { +ABSL_NAMESPACE_BEGIN +namespace strings_internal { + +// StringConstant<T> represents a compile time string constant. +// It can be accessed via its `y_absl::string_view value` static member. +// It is guaranteed that the `string_view` returned has constant `.data()`, +// constant `.size()` and constant `value[i]` for all `0 <= i < .size()` +// +// The `T` is an opaque type. It is guaranteed that different string constants +// will have different values of `T`. This allows users to associate the string +// constant with other static state at compile time. +// +// Instances should be made using the `MakeStringConstant()` factory function +// below. +template <typename T> +struct StringConstant { + static constexpr y_absl::string_view value = T{}(); + constexpr y_absl::string_view operator()() const { return value; } + + // Check to be sure `view` points to constant data. + // Otherwise, it can't be constant evaluated. + static_assert(value.empty() || 2 * value[0] != 1, + "The input string_view must point to constant data."); +}; + +template <typename T> +constexpr y_absl::string_view StringConstant<T>::value; // NOLINT + +// Factory function for `StringConstant` instances. +// It supports callables that have a constexpr default constructor and a +// constexpr operator(). +// It must return an `y_absl::string_view` or `const char*` pointing to constant +// data. This is validated at compile time. +template <typename T> +constexpr StringConstant<T> MakeStringConstant(T) { + return {}; +} + +} // namespace strings_internal +ABSL_NAMESPACE_END +} // namespace y_absl + +#endif // ABSL_STRINGS_INTERNAL_STRING_CONSTANT_H_ |