3 files changed, 136 insertions, 0 deletions

diff --git a/graphs/cpp/bimap/bimap.hh b/graphs/cpp/bimap/bimap.hh
new file mode 100644
index 0000000..25f459d
--- /dev/null
+++ b/graphs/cpp/bimap/bimap.hh
@@ -0,0 +1,36 @@
+#pragma once
+
+#include <map>
+
+    template <typename Lhs, typename Rhs>
+    class Bimap
+{
+    static_assert(!std::is_same_v<Lhs, Rhs>,
+                  "Lhs and Rhs must be different types");
+    using mapLhs = std::map<Lhs, Rhs>;
+    using mapRhs = std::map<Rhs, Lhs>;
+    using iteratorLhs = typename mapLhs::const_iterator;
+    using iteratorRhs = typename mapRhs::const_iterator;
+
+public:
+    bool insert(const Lhs& vl, const Rhs& vr);
+    bool insert(const Rhs& vr, const Lhs& vl);
+
+    std::size_t erase(const Lhs& vl);
+    std::size_t erase(const Rhs& vr);
+
+    iteratorLhs find(const Lhs& vl) const;
+    iteratorRhs find(const Rhs& vr) const;
+
+    std::size_t size() const;
+    void clear();
+
+    const mapLhs& get_lhs() const;
+    const mapRhs& get_rhs() const;
+
+private:
+    mapLhs lhs_;
+    mapRhs rhs_;
+};
+
+#include "bimap.hxx"
diff --git a/graphs/cpp/bimap/bimap.hxx b/graphs/cpp/bimap/bimap.hxx
new file mode 100644
index 0000000..9b1eb1f
--- /dev/null
+++ b/graphs/cpp/bimap/bimap.hxx
@@ -0,0 +1,74 @@
+#pragma once
+#include "bimap.hh"
+
+template <typename Lhs, typename Rhs>
+bool Bimap<Lhs, Rhs>::insert(const Lhs& vl, const Rhs& vr)
+{
+    if (lhs_.contains(vl) || rhs_.contains(vr))
+        return false;
+    if (lhs_.contains(vl) || !lhs_.insert({ vl, vr }).second)
+        return false;
+    if (rhs_.contains(vr) || !rhs_.insert({ vr, vl }).second)
+        return false;
+    return true;
+}
+template <typename Lhs, typename Rhs>
+bool Bimap<Lhs, Rhs>::insert(const Rhs& vr, const Lhs& vl)
+{
+    return insert(vl, vr);
+}
+template <typename Lhs, typename Rhs>
+std::size_t Bimap<Lhs, Rhs>::erase(const Lhs& vl)
+{
+    if (lhs_.size() <= 0)
+        return 0;
+    auto range = lhs_.find(vl);
+    if (range == lhs_.end())
+        return 0;
+    rhs_.erase(range->second);
+    size_t n = lhs_.erase(range->first);
+    return n;
+}
+template <typename Lhs, typename Rhs>
+std::size_t Bimap<Lhs, Rhs>::erase(const Rhs& vr)
+{
+    if (lhs_.size() <= 0)
+        return 0;
+    auto range = rhs_.find(vr);
+    if (range == rhs_.end())
+        return 0;
+    lhs_.erase(range->second);
+    size_t n = rhs_.erase(range->first);
+    return n;
+}
+template <typename Lhs, typename Rhs>
+typename Bimap<Lhs, Rhs>::iteratorLhs Bimap<Lhs, Rhs>::find(const Lhs& vl) const
+{
+    return lhs_.find(vl);
+}
+template <typename Lhs, typename Rhs>
+typename Bimap<Lhs, Rhs>::iteratorRhs Bimap<Lhs, Rhs>::find(const Rhs& vr) const
+{
+    return rhs_.find(vr);
+}
+template <typename Lhs, typename Rhs>
+std::size_t Bimap<Lhs, Rhs>::size() const
+{
+    return lhs_.size();
+}
+template <typename Lhs, typename Rhs>
+void Bimap<Lhs, Rhs>::clear()
+{
+    lhs_ = {};
+    rhs_ = {};
+}
+template <typename Lhs, typename Rhs>
+const typename Bimap<Lhs, Rhs>::mapLhs& Bimap<Lhs, Rhs>::get_lhs() const
+{
+    return lhs_;
+}
+template <typename Lhs, typename Rhs>
+const typename Bimap<Lhs, Rhs>::mapRhs& Bimap<Lhs, Rhs>::get_rhs() const
+{
+    return rhs_;
+}
\ No newline at end of file
diff --git a/graphs/cpp/bimap/bimap_example.cc b/graphs/cpp/bimap/bimap_example.cc
new file mode 100644
index 0000000..771a2b0
--- /dev/null
+++ b/graphs/cpp/bimap/bimap_example.cc
@@ -0,0 +1,26 @@
+#include <iostream>
+#include <string>
+
+#include "bimap.hh"
+
+int main()
+{
+    Bimap<int, std::string> bm;
+
+    bm.insert(16, "Test.");
+    bm.insert("Prologin", 29);
+
+    std::cout << "The bimap contains: " << bm.size() << " elements\n";
+
+    auto it1 = bm.find("Test.");
+    auto it2 = bm.find(29);
+
+    std::cout << it1->first << ' ' << it1->second << '\n';
+    std::cout << it2->first << ' ' << it2->second << '\n';
+
+    bm.erase(16);
+    bm.erase("Prologin");
+
+    bm.clear();
+    return 0;
+}