From c8e25987b87eeb8a00a5a8fdc72775bf2b35cded Mon Sep 17 00:00:00 2001
From: Mislav Bradac <mislav.bradac@memgraph.io>
Date: Tue, 13 Jun 2017 12:41:56 +0200
Subject: [PATCH] Add asserts to placeholder

Reviewers: buda

Reviewed By: buda

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D463
---
 src/utils/placeholder.hpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/utils/placeholder.hpp b/src/utils/placeholder.hpp
index 1eb09c8a9..e7942dfe4 100644
--- a/src/utils/placeholder.hpp
+++ b/src/utils/placeholder.hpp
@@ -56,6 +56,7 @@ class Placeholder {
    * @param T& item reference to the item initialized in allocated memory
    */
   void set(const T &item) {
+    debug_assert(!initialized, "Placeholder object already initialized");
     new (data._M_addr()) T(item);
     initialized = true;
   }
@@ -66,6 +67,7 @@ class Placeholder {
    * @param T&& rvalue reference to the item which is moved to allocated memory
    */
   void set(T &&item) {
+    debug_assert(!initialized, "Placeholder object already initialized");
     new (data._M_addr()) T(std::move(item));
     initialized = true;
   }
@@ -79,6 +81,7 @@ class Placeholder {
    */
   template <class... Args>
   void emplace(Args &&... args) {
+    debug_assert(!initialized, "Placeholder object already initialized");
     new (data._M_addr()) T(args...);
     initialized = true;
   }