| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * 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. |
| */ |
| |
| #ifndef LIBTEXTCLASSIFIER_COMMON_VECTOR_SPAN_H_ |
| #define LIBTEXTCLASSIFIER_COMMON_VECTOR_SPAN_H_ |
| |
| #include <vector> |
| |
| namespace libtextclassifier { |
| |
| // StringPiece analogue for std::vector<T>. |
| template <class T> |
| class VectorSpan { |
| public: |
| VectorSpan() : begin_(), end_() {} |
| VectorSpan(const std::vector<T>& v) // NOLINT(runtime/explicit) |
| : begin_(v.begin()), end_(v.end()) {} |
| VectorSpan(typename std::vector<T>::const_iterator begin, |
| typename std::vector<T>::const_iterator end) |
| : begin_(begin), end_(end) {} |
| |
| const T& operator[](typename std::vector<T>::size_type i) const { |
| return *(begin_ + i); |
| } |
| |
| int size() const { return end_ - begin_; } |
| typename std::vector<T>::const_iterator begin() const { return begin_; } |
| typename std::vector<T>::const_iterator end() const { return end_; } |
| |
| private: |
| typename std::vector<T>::const_iterator begin_; |
| typename std::vector<T>::const_iterator end_; |
| }; |
| |
| } // namespace libtextclassifier |
| |
| #endif // LIBTEXTCLASSIFIER_COMMON_VECTOR_SPAN_H_ |