minus_Tensor1.hpp

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/* Declares a wrapper class for the unary minus (-) operator. */
 
#pragma once
 
namespace FTensor
{
  template <class A, class T, int Dim, char i> class minus_Tensor1
  {
    Tensor1_Expr<A, T, Dim, i> iterA;
 
  public:
    T operator()(const int N) const { return -iterA(N); }
 
    minus_Tensor1(const Tensor1_Expr<A, T, Dim, i> &a) : iterA(a) {}
  };
 
  template <class A, class T, int Dim, char i>
  Tensor1_Expr<minus_Tensor1<A, T, Dim, i>, T, Dim, i>
  operator-(const Tensor1_Expr<A, T, Dim, i> &a)
  {
    using TensorExpr = minus_Tensor1<A, T, Dim, i>;
    return Tensor1_Expr<TensorExpr, T, Dim, i>(TensorExpr(a));
  }
}