count function

dlang · May 26, 2024 · 4667da0 · 4667da0
1 parent 7034a0f
commit 4667da0
Show file tree

Hide file tree

Showing 3 changed files with 13 additions and 1 deletion.
diff --git a/extras/AssociativeContainers/map.hpp b/extras/AssociativeContainers/map.hpp
@@ -33,4 +33,7 @@ class Map
     size_t max_size() const         { return this->map.max_size(); }
 
     void clear() noexcept           { this->map.clear(); }
+
+    size_t count(K const& key ) const { return this->map.count(key); }
+
 };
diff --git a/source/stdcpp/map.d b/source/stdcpp/map.d
@@ -33,7 +33,7 @@ module stdcpp.map;
 
     ref Value at( ref const Key key);
 
-    ref Value at(const Key key)
+    extern(D) ref Value at(const Key key)
     {
         return this.at(key);
     }
@@ -43,4 +43,11 @@ module stdcpp.map;
     size_t max_size() const;
 
     void clear() nothrow;
+
+    size_t count(ref const Key key) const;
+
+    extern(D) size_t count(const Key key) const
+    {
+        return this.count(key);
+    }
  }
diff --git a/source/stdcpp/test/map.d b/source/stdcpp/test/map.d
@@ -19,7 +19,9 @@ unittest
     assert(mymap.size == 3);
     assert(mymap.empty == 0);
     assert(mymap.at(2) == 'b');
+    assert(mymap.count(1) == 1);
     mymap.clear();
     assert(mymap.size == 0);
     assert(mymap.empty == 1);
+    assert(mymap.count(1) == 0); // container cleared
 }