Library 5

- Added template
- Matrix & MatrixVec completed

librerie/exercise5/container/container.cpp

@@ -0,0 +1,18 @@
+
+namespace lasd {
+
+template <typename Data>
+void AuxFoldExists(const Data& dat, const void* val, void* exists){
+  if(dat == *((Data*)val)){
+    *((bool*)exists) = true;
+  }
+}
+
+template <typename Data>
+bool FoldableContainer<Data>::Exists(const Data& dat) const noexcept{
+  bool exists = false;
+  FoldPreOrder(&AuxFoldExists<Data>, &dat, &exists);
+  return exists;
+}
+
+}