mirror of
https://github.com/triqs/dft_tools
synced 2024-12-26 14:23:38 +01:00
edd1ff4529
A first general restructuration of the doc according to the pattern [tour|tutorial|reference]. In the reference part, objects are documented per topic. In each topic, [definition|c++|python|hdf5] (not yet implemented)
27 lines
715 B
C++
27 lines
715 B
C++
#include "triqs/clef.hpp"
|
|
#include <iostream>
|
|
using namespace triqs::clef;
|
|
|
|
int main() {
|
|
int N = 5;
|
|
double pi = std::acos(-1);
|
|
|
|
// automatic assignment of vector
|
|
placeholder<0> k_;
|
|
std::vector<double> V(N);
|
|
make_expr(V)[k_] << cos((2 * pi * k_) / N);
|
|
|
|
// chaining them ...
|
|
placeholder<1> i_;
|
|
std::vector<std::vector<double>> W(3, std::vector<double>(N));
|
|
make_expr(W)[i_][k_] << i_ + cos((2 * pi * k_) / N);
|
|
|
|
// check result...
|
|
for (size_t u = 0; u < V.size(); ++u)
|
|
if (std::abs(V[u] - cos((2 * pi * u) / N)) > 1.e-10) throw "error!";
|
|
for (size_t w = 0; w < W.size(); ++w)
|
|
for (size_t u = 0; u < W[w].size(); ++u)
|
|
if (std::abs(W[w][u] - (w + cos((2 * pi * u) / N))) > 1.e-10) throw "error!";
|
|
}
|
|
|