diff --git a/src/Assert.hpp b/src/Assert.hpp
index 503b353..c8a3c76 100644
--- a/src/Assert.hpp
+++ b/src/Assert.hpp
@@ -12,12 +12,12 @@
         ss << #expr << "\"";                                                                                           \
         throw std::logic_error(ss.str());                                                                              \
     }
+#define AssertForEach(iterator, assertion) { for (auto item: iterator) Assert(assertion)}
 #else
 // Assert is empty if NO_ASSERT is defined.
 #define Assert(expr) ;
+#define AssertForEach(iterator, assertion) ;
 #endif
 
 #define AssertNotNull(value) Assert(value != nullptr)
-#define UnpackWeakPtr(weakPtr, sharedPtr)                                                                              \
-    Assert(!weakPtr.expired());                                                                                        \
-    auto sharedPtr = weakPtr.lock();
+#define AssertAllNotNull(iterator) AssertForEach(iterator, item != nullptr)
diff --git a/tests/AssertTests.cpp b/tests/AssertTests.cpp
index dc79505..7d627ab 100644
--- a/tests/AssertTests.cpp
+++ b/tests/AssertTests.cpp
@@ -19,3 +19,8 @@ TEST_CASE("Multiple asserts", "[Utilities]") {
 }
 
 TEST_CASE("AssertNotNull throws if nullptr", "[Utilities]") { REQUIRE_THROWS(TestWrapperNotNull(nullptr)); }
+
+TEST_CASE("Assert for each", "[Utilities]") {
+    auto i = {10, 500, 2300, 454};
+    AssertForEach(i, item > 0)
+}