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c36510c21e
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68 lines
1.8 KiB
C++
68 lines
1.8 KiB
C++
// Copyright 2016 Google Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.!
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#ifndef ABSL_FLAGS_FLAG_H_
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#define ABSL_FLAGS_FLAG_H_
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#include <functional>
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#include <memory>
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#include <string>
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#include <vector>
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namespace absl {
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namespace internal {
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struct FlagFunc;
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void RegisterFlag(const std::string &name, std::shared_ptr<FlagFunc> func);
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} // namespace internal
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template <typename T>
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class Flag {
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public:
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Flag(const char *name, const char *type, const char *help,
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const T &defautl_value);
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virtual ~Flag();
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const T &value() const;
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void set_value(const T &value);
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void set_value_as_str(const std::string &value_as_str);
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private:
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T value_;
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std::shared_ptr<internal::FlagFunc> func_;
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};
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template <typename T>
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const T &GetFlag(const Flag<T> &flag) {
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return flag.value();
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}
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template <typename T, typename V>
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void SetFlag(Flag<T> *flag, const V &v) {
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const T value(v);
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flag->set_value(value);
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}
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#define HAS_ABSL_CLEANUP_FLAGS
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void CleanupFlags();
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} // namespace absl
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#define ABSL_FLAG(Type, name, defautl_value, help) \
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absl::Flag<Type> FLAGS_##name(#name, #Type, help, defautl_value);
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#define ABSL_DECLARE_FLAG(Type, name) extern absl::Flag<Type> FLAGS_##name;
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#endif // ABSL_FLAGS_FLAG_H_
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