Merge pull request #4 from Daniel599/master

fixed range iterators constructor

Author: nlohmann

src/fifo_map.hpp

@@ -131,7 +131,7 @@ template <
     /// constructor for a range of elements
     template<class InputIterator>
     fifo_map(InputIterator first, InputIterator last)
-        : m_keys(), m_compare(m_keys), m_map(m_compare)
+        : m_keys(), m_compare(&m_keys), m_map(m_compare)
     {
         for (auto it = first; it != last; ++it)
         {

test/unit.cpp

@@ -808,3 +808,16 @@ TEST_CASE("regression tests")
         }
     }
 }
+
+TEST_CASE("constructors")
+{
+    SECTION("range iterators constructor")
+    {
+        std::map<std::string, int> inputs = {{"A", 1}, {"B", 2}};
+        nlohmann::fifo_map<std::string, int> m(inputs.begin(), inputs.end());
+        CHECK(m.size() == 2);
+        CHECK(m["A"] == 1);
+        CHECK(m["B"] == 2);
+
+    }
+}