dft_tools/test/triqs/arrays/make_immutables.cpp

/*******************************************************************************
 *
 * TRIQS: a Toolbox for Research in Interacting Quantum Systems
 *
 * Copyright (C) 2011 by O. Parcollet
 *
 * TRIQS is free software: you can redistribute it and/or modify it under the
 * terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later
 * version.
 *
 * TRIQS 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 General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with
 * TRIQS. If not, see <http://www.gnu.org/licenses/>.
 *
 ******************************************************************************/
#include "./common.hpp"
#include <triqs/arrays/array.hpp>
#include <triqs/arrays/make_immutable_array.hpp>
#include <iostream>

namespace tqa = triqs::arrays;
namespace tql = triqs::clef;
using tqa::range;

int main(int argc, char **argv) {
 
 
 tql::placeholder<0> i_; tql::placeholder<1> j_;
 
 TEST( make_immutable_array( i_ + j_, i_= range(0,2), j_=range(0,2)));
 
 TEST( (tqa::array<int,2>(tqa::make_immutable_array( i_ + j_, i_= range(0,2), j_=range(0,2)))));

 // or if you prefer using a lambda...
 auto b = make_immutable_array ( [](int i, int j) { return i-j;}, range (0,2), range(0,2));

 std::cerr << "b = " << b                  << std::endl;
 std::cerr << "b = " << tqa::array<double,2>(b) << std::endl;

 return 0;
}