Nano STL Allocator

#ifndef NANOSTL_ALLOCATOR_H_
#define NANOSTL_ALLOCATOR_H_

#ifdef NANOSTL_DEBUG
#include <iostream>
#endif

namespace nanostl {

typedef unsigned long long size_type;

#ifdef __clang__
#pragma clang diagnostic push
#if __has_warning("-Wzero-as-null-pointer-constant")
#pragma clang diagnostic ignored "-Wzero-as-null-pointer-constant"
#endif
#endif

///
/// allocator class implementaion without libc function
///
template <typename T>
class allocator {
 public:
  typedef T value_type;
  typedef T* pointer;
  typedef const T* const_pointer;
  typedef T& reference;
  typedef const T& const_reference;

  allocator() {}

  T* allocate(size_type n, const void* hint = 0) {
    (void)hint;  // Ignore `hint' for a while.
    if (n < 1) {
      return 0;
    }

#ifdef NANOSTL_DEBUG
    std::cerr << "allocator::allocate: n " << n << std::endl;
#endif

    return new T[n];
  }

  void deallocate(T* p, size_type n) {
    (void)n;
    delete[] p;
  }

 private:
};

#ifdef __clang__
#pragma clang diagnostic pop
#endif

}  // namespace nanostl

#endif  // NANOSTL_ALLOCATOR_H_