Move dependencies in 'external' directory and pdate git submodules

external/Catch2/tests/SelfTest/UsageTests/Decomposition.tests.cpp

@@ -0,0 +1,41 @@
+
+//              Copyright Catch2 Authors
+// Distributed under the Boost Software License, Version 1.0.
+//   (See accompanying file LICENSE.txt or copy at
+//        https://www.boost.org/LICENSE_1_0.txt)
+
+// SPDX-License-Identifier: BSL-1.0
+
+#include <iostream>
+#include <cstdio>
+
+namespace {
+
+struct truthy {
+    truthy(bool b):m_value(b){}
+    operator bool() const {
+        return false;
+    }
+    bool m_value;
+};
+
+std::ostream& operator<<(std::ostream& o, truthy) {
+    o << "Hey, its truthy!";
+    return o;
+}
+
+} // end anonymous namespace
+
+#include <catch2/catch_test_macros.hpp>
+
+TEST_CASE( "Reconstruction should be based on stringification: #914" , "[Decomposition][failing][.]") {
+    CHECK(truthy(false));
+}
+
+TEST_CASE("#1005: Comparing pointer to int and long (NULL can be either on various systems)", "[Decomposition][approvals]") {
+    FILE* fptr = nullptr;
+    REQUIRE( fptr == 0 );
+    REQUIRE_FALSE( fptr != 0 );
+    REQUIRE( fptr == 0l );
+    REQUIRE_FALSE( fptr != 0l );
+}