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https://github.com/triqs/dft_tools
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22 lines
638 B
C++
22 lines
638 B
C++
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#include <triqs/arrays.hpp>
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using triqs::arrays::array;
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using triqs::arrays::ellipsis;
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// a generic function that sum array, array_view or in fact anything
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// with the right concept on its first dimension
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template <typename ArrayType> array<typename ArrayType::value_type, ArrayType::rank - 1> sum0(ArrayType const& A) {
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array<typename ArrayType::value_type, ArrayType::rank - 1> res = A(0, ellipsis());
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for (size_t u = 1; u < first_dim(A); ++u) res += A(u, ellipsis());
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return res;
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}
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// test
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int main() {
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array<double, 2> A(5, 2);
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A() = 2;
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array<double, 3> B(5, 2, 3);
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B() = 1;
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std::cout << sum0(A) << sum0(B) << std::endl;
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}
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