75 lines
1.4 KiB
C++
75 lines
1.4 KiB
C++
#ifndef DIGRAPH_H_
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#define DIGRAPH_H_
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#include "graph.h"
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#include "algorithm/breadth_first_search.h"
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#include <ranges>
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namespace graph {
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template<typename T>
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class Digraph : public Graph<T> {
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public:
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Digraph() = default;
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Digraph(std::map<T, std::set<T>> G);
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// Return true if there is a path from u to v
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bool contains(const T& u, const T& v);
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// Add edge e(u,v)
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void insert(const T& u, const T& v);
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// Remove edge e(u,v)
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void remove(const T& u, const T& v);
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// Reverse graph directions
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auto reverse();
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// Return vertices
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auto vertices();
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};
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template<typename T>
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Digraph<T>::Digraph(std::map<T, std::set<T>> G) {
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this->adjMatrix = G;
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}
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template<typename T>
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bool Digraph<T>::contains(const T& u, const T& v) {
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return algo::BreadthFirstSearch<T>(this->adjMatrix).query(u, v);
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}
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template<typename T>
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void Digraph<T>::insert(const T& u, const T& v) {
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this->adjMatrix[u].insert(v);
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this->adjMatrix[v];
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}
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template<typename T>
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void Digraph<T>::remove(const T& u, const T& v) {
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this->adjMatrix[u].erase(v);
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}
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template<typename T>
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auto Digraph<T>::reverse() {
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std::map<T, std::set<T>> revMatrix;
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for (const auto& u : vertices()) {
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for (const auto& v : this->adjMatrix[u]) {
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revMatrix[v].insert(u);
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}
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}
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return revMatrix;
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}
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template<typename T>
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auto Digraph<T>::vertices() {
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return std::views::keys(this->adjMatrix);
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}
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} // namespace graph
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#endif |