54 lines
1.3 KiB
C++
54 lines
1.3 KiB
C++
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//=== llvm/unittest/ADT/DepthFirstIteratorTest.cpp - DFS iterator tests ---===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/DepthFirstIterator.h"
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#include "TestGraph.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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namespace llvm {
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template <typename T> struct CountedSet {
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typedef typename SmallPtrSet<T, 4>::iterator iterator;
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SmallPtrSet<T, 4> S;
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int InsertVisited = 0;
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std::pair<iterator, bool> insert(const T &Item) {
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InsertVisited++;
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return S.insert(Item);
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}
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size_t count(const T &Item) const { return S.count(Item); }
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void completed(T) { }
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};
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template <typename T> class df_iterator_storage<CountedSet<T>, true> {
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public:
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df_iterator_storage(CountedSet<T> &VSet) : Visited(VSet) {}
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CountedSet<T> &Visited;
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};
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TEST(DepthFirstIteratorTest, ActuallyUpdateIterator) {
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typedef CountedSet<Graph<3>::NodeType *> StorageT;
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typedef df_iterator<Graph<3>, StorageT, true> DFIter;
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Graph<3> G;
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G.AddEdge(0, 1);
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G.AddEdge(0, 2);
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StorageT S;
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for (auto N : make_range(DFIter::begin(G, S), DFIter::end(G, S)))
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(void)N;
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EXPECT_EQ(3, S.InsertVisited);
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}
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}
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