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56 lines
1014 B
C++
56 lines
1014 B
C++
// Copyright 2018 The RE2 Authors. All Rights Reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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#ifndef UTIL_POD_ARRAY_H_
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#define UTIL_POD_ARRAY_H_
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#include <memory>
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#include <type_traits>
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namespace re2 {
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template <typename T>
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class PODArray {
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public:
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static_assert(std::is_pod<T>::value,
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"T must be POD");
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PODArray()
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: ptr_() {}
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explicit PODArray(int len)
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: ptr_(std::allocator<T>().allocate(len), Deleter(len)) {}
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T* data() const {
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return ptr_.get();
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}
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int size() const {
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return ptr_.get_deleter().len_;
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}
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T& operator[](int pos) const {
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return ptr_[pos];
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}
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private:
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struct Deleter {
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Deleter()
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: len_(0) {}
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explicit Deleter(int len)
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: len_(len) {}
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void operator()(T* ptr) const {
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std::allocator<T>().deallocate(ptr, len_);
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}
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int len_;
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};
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std::unique_ptr<T[], Deleter> ptr_;
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};
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} // namespace re2
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#endif // UTIL_POD_ARRAY_H_
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