bloaty/third_party/re2/util/pod_array.h

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