FFaTensor1.H

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// SPDX-FileCopyrightText: 2023 SAP SE
//
// SPDX-License-Identifier: Apache-2.0
//
// This file is part of FEDEM - https://openfedem.org
 
#ifndef FFA_TENSOR1_H
#define FFA_TENSOR1_H
 
#include <iostream>
 
class FFaTensor2;
class FFaTensor3;
 
 
class FFaTensor1
{
  double myT;
 
public:
 
  // Constructors
 
  FFaTensor1(double d = 0.0)      { myT = d; }
  FFaTensor1(const FFaTensor1& t) { myT = t.myT; }
  FFaTensor1(const FFaTensor2& t);
  FFaTensor1(const FFaTensor3& t);
 
  void fill(double d) { myT = d; }
 
  // Local operators
 
  FFaTensor1& operator= (const FFaTensor1& t);
  FFaTensor1& operator= (const FFaTensor2& t);
  FFaTensor1& operator= (const FFaTensor3& t);
 
  FFaTensor1& operator+= (const FFaTensor1& t)
  {
    myT += t.myT;
    return *this;
  }
 
  FFaTensor1& operator-= (const FFaTensor1& t)
  {
    myT -= t.myT;
    return *this;
  }
 
  FFaTensor1& operator*= (double d)
  {
    myT *= d;
    return *this;
  }
 
  FFaTensor1& operator/= (double d)
  {
    myT /= d;
    return *this;
  }
 
  operator double() const { return myT; }
 
  // Global operators
 
  friend FFaTensor1 operator- (const FFaTensor1&);
  friend FFaTensor1 operator+ (const FFaTensor1&, const FFaTensor1&);
  friend FFaTensor1 operator- (const FFaTensor1&, const FFaTensor1&);
  // Scaling by scalar
  friend FFaTensor1 operator* (const FFaTensor1&, double);
  friend FFaTensor1 operator* (double, const FFaTensor1&);
  friend FFaTensor1 operator/ (const FFaTensor1&, double);
  // Equality
  friend bool operator==      (const FFaTensor1&, const FFaTensor1&);
  friend bool operator!=      (const FFaTensor1&, const FFaTensor1&);
  // Writing and reading
  friend std::ostream& operator<< (std::ostream&, const FFaTensor1&);
  friend std::istream& operator>> (std::istream&, FFaTensor1&);
};
 
#endif