Move dependencies in 'external' directory and pdate git submodules

external/Catch2/tests/ExtraTests/X04-DisabledExceptions-CustomHandler.cpp

@@ -0,0 +1,40 @@
+
+//              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 <catch2/catch_test_macros.hpp>
+
+#include <iostream>
+
+namespace Catch {
+    [[noreturn]]
+    void throw_exception(std::exception const& e) {
+        std::cerr << "====== CUSTOM HANDLER ====== run terminates because an exception was thrown.\n"
+                  << "The message was: " << e.what() << '\n';
+        // Avoid abort and other exceptional exits -- there is no way
+        // to tell CMake that abort is the desired outcome of a test.
+        exit(1);
+    }
+}
+
+TEST_CASE("Tests that run") {
+    // All of these should be run and be reported
+    CHECK(1 == 2);
+    CHECK(1 == 1);
+    CHECK(1 != 3);
+    CHECK(1 == 4);
+}
+
+
+
+TEST_CASE("Tests that abort") {
+    REQUIRE(1 == 1);
+    REQUIRE(1 != 2);
+    REQUIRE(1 == 3);
+    // We should not get here, because the test above aborts
+    REQUIRE(1 != 4);
+}