Basix 0.4.0

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indexing.h
1 // Copyright (c) 2020 Chris Richardson
2 // FEniCS Project
3 // SPDX-License-Identifier: MIT
4 
5 #pragma once
6 
8 namespace basix::indexing
9 {
13 constexpr int idx(int p) { return p; }
14 
22 constexpr int idx(int p, int q) { return (p + q + 1) * (p + q) / 2 + q; }
23 
29 constexpr int idx(int p, int q, int r)
30 {
31  return (p + q + r) * (p + q + r + 1) * (p + q + r + 2) / 6
32  + (q + r) * (q + r + 1) / 2 + r;
33 }
34 } // namespace basix::indexing
basix::indexing::idx
constexpr int idx(int p)
Definition: indexing.h:13
basix::indexing
Indexing.
Definition: indexing.h:8