complex.hpp

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/*
  mptensor - Parallel Library for Tensor Network Methods
 
  Copyright 2016 Satoshi Morita
 
  mptensor is free software: you can redistribute it and/or modify it
  under the terms of the GNU Lesser General Public License as
  published by the Free Software Foundation, either version 3 of the
  License, or (at your option) any later version.
 
  mptensor is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  Lesser General Public License for more details.
 
  You should have received a copy of the GNU Lesser General Public
  License along with mptensor.  If not, see
  <https://www.gnu.org/licenses/>.
*/
 
#ifndef _COMPLEX_HPP_
#define _COMPLEX_HPP_
 
#include <complex>
 
namespace mptensor {
 
typedef std::complex<double> complex;
 
template <typename C>
constexpr size_t value_type_tag();
template <>
constexpr size_t value_type_tag<double>() {
  return 0;
};
template <>
constexpr size_t value_type_tag<complex>() {
  return 1;
};
 
template <typename C>
constexpr char* value_type_name();
template <>
constexpr char* value_type_name<double>() {
  return (char*)"double";
};
template <>
constexpr char* value_type_name<complex>() {
  return (char*)"complex";
};
 
}  // namespace mptensor
 
#endif  // _COMPLEX_HPP_