Use make_*_ptr to construct pointers

src/query/frontend/logical/operator.hpp

@@ -89,7 +89,7 @@ class ScanAll : public LogicalOperator {
 
  public:
   std::unique_ptr<Cursor> MakeCursor(GraphDbAccessor db) override {
-    return std::unique_ptr<Cursor>(new ScanAllCursor(*this, db));
+    return std::make_unique<ScanAllCursor>(*this, db);
   }
 
  private:
@@ -111,7 +111,7 @@ class Produce : public LogicalOperator {
   }
 
   std::unique_ptr<Cursor> MakeCursor(GraphDbAccessor db) override {
-    return std::unique_ptr<Cursor>(new ProduceCursor(*this, db));
+    return std::make_unique<ProduceCursor>(*this, db);
   }
 
   std::vector<Symbol> OutputSymbols(SymbolTable& symbol_table) override {

src/query/frontend/logical/planner.hpp

@@ -22,7 +22,7 @@ std::shared_ptr<LogicalOperator> GenMatch(
     throw std::runtime_error("Not implemented");
   }
   auto& node_part = pattern->node_parts_[0];
-  return std::shared_ptr<LogicalOperator>(new ScanAll(node_part));
+  return std::make_shared<ScanAll>(node_part);
 }
 
 std::shared_ptr<LogicalOperator> GenReturn(
@@ -31,7 +31,7 @@ std::shared_ptr<LogicalOperator> GenReturn(
   if (!current_op) {
     throw std::runtime_error("Not implemented");
   }
-  return std::shared_ptr<LogicalOperator>(new Produce(current_op, ret.exprs_));
+  return std::make_shared<Produce>(current_op, ret.exprs_);
 }
 
 std::shared_ptr<LogicalOperator> Apply(Query& query)