// SPDX-FileCopyrightText: 2026 Filip Leonarski, Paul Scherrer Institute <filip.leonarski@psi.ch>
// SPDX-License-Identifier: GPL-3.0-only

#pragma once

#include <utility>
#include <vector>

// Sort pairs of finite doubles ascending, first by .first then by .second, on the GPU. Two pairs that
// compare equal are the same two numbers, so this is the sequence std::sort leaves, to the bit. Only
// built with CUDA; a device without room for about 40 bytes a pair throws (run on the CPU then: rugnux --no-gpu).
void SortPairsGPU(std::vector<std::pair<double, double>> &v);