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2026-07-13 12:40:42 +08:00

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// Copyright (c) 2023 CINN Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "paddle/cinn/common/topo_walker.h"
#include <glog/logging.h>
#include <gtest/gtest.h>
namespace cinn {
namespace common {
TEST(TopoWalker, simple) {
std::vector<std::pair<int, int>> edges{
{0, 3}, {1, 2}, {1, 3}, {2, 3}, {3, 4}};
TopoWalker<int> visitor(
[&](int node, const std::function<void(int)>& NodeHandler) {
for (const auto& pair : edges) {
if (pair.second == node) {
NodeHandler(pair.first);
}
}
},
[&](int node, const std::function<void(int)>& NodeHandler) {
for (const auto& pair : edges) {
if (pair.first == node) {
NodeHandler(pair.second);
}
}
});
std::vector<int> sources{0, 1};
std::vector<int> outputs;
visitor(sources.begin(), sources.end(), [&](int node) {
outputs.push_back(node);
});
std::vector<int> expected{0, 1, 2, 3, 4};
EXPECT_TRUE((outputs == expected));
}
} // namespace common
} // namespace cinn