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// { dg-do compile }

// { dg-options "-O2 -Warray-bounds" }

class String

{

public:

  virtual unsigned long length() const = 0;

  virtual char get(unsigned long index) const = 0;

  virtual void set(unsigned long index, char value) = 0;

  virtual char& operator[] (unsigned long value) = 0;

  virtual ~String() {};

};

template class FixedString : public String

{

private:

  char contents[size];

public:

  virtual unsigned long length() const { return size; }

  virtual char get(unsigned long index) const { return contents[index]; }

  virtual void set(unsigned long index, char value) { contents[index] = value; }

  virtual char& operator[] (unsigned long index) { return contents[index]; }

  FixedString() { contents[0] = '\0'; } // { dg-warning "above array bounds" }

};

void print_length (const String& string);

int main()

{

  const FixedString<0> empty;

  print_length(empty);

  return 0;

}