2 files changed, 24 insertions, 1 deletions
diff --git a/libs/kstd/include/kstd/flat_map b/libs/kstd/include/kstd/flat_map
index 6ffbbcf..3b13754 100644
--- a/libs/kstd/include/kstd/flat_map
+++ b/libs/kstd/include/kstd/flat_map
@@ -205,6 +205,24 @@ namespace kstd
       return const_reverse_iterator{cbegin()};
     }
 
+    //! Check whether this flat map is empty or not
+    [[nodiscard]] auto empty() const noexcept -> bool
+    {
+      return m_containers.keys.empty();
+    }
+
+    //! Get the number of elements in this flat map.
+    [[nodiscard]] auto size() const noexcept -> size_type
+    {
+      return m_containers.keys.size();
+    }
+
+    //! Get the maximum number of elements possible in this flat map
+    [[nodiscard]] auto max_size() const noexcept -> size_type
+    {
+      return std::min(m_containers.keys.max_size(), m_containers.values.max_size());
+    }
+
     //! Try to insert a new key-value pair into the map.
     //!
     //! @param args Arguments to use for constructing the key-value pair.
diff --git a/libs/kstd/include/kstd/units b/libs/kstd/include/kstd/units
index f6dcdb1..bc7e1b9 100644
--- a/libs/kstd/include/kstd/units
+++ b/libs/kstd/include/kstd/units
@@ -14,6 +14,11 @@ namespace kstd
   {
     using value_type = ValueType;
 
+    constexpr basic_unit() noexcept
+      : value{}
+    {
+    }
+
     explicit constexpr basic_unit(value_type value) noexcept
         : value{value}
     {}
@@ -142,4 +147,4 @@ namespace kstd
 
 }  // namespace kstd
 
-#endif
-\ No newline at end of file
+#endif