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