Test: workaround for gcc 4.8 std::string problem

Author: biojppm

test/test_lib/test_engine.cpp

@@ -45,7 +45,7 @@ void test_expected_error_testsuite_from_yaml(ExpectedErrorType errtype, TestCase
 {
     (void)tcflags;
     ExpectError::check_error(errtype, [&]{
-        std::string copy = parsed_yaml;
+        std::vector<char> copy(parsed_yaml.begin(), parsed_yaml.end()); // g++ 4.8 fails with std::string
         extra::EventHandlerTestSuite::EventSink sink;
         extra::EventHandlerTestSuite handler(&sink);
         handler.reset();
@@ -58,7 +58,7 @@ void test_expected_error_ints_from_yaml(ExpectedErrorType errtype, TestCaseFlags
 {
     (void)tcflags;
     ExpectError::check_error(errtype, [&]{
-        std::string copy = parsed_yaml;
+        std::vector<char> copy(parsed_yaml.begin(), parsed_yaml.end()); // g++ 4.8 fails with std::string
         extra::EventHandlerInts handler{};
         handler.reset(to_csubstr(copy), substr{}, nullptr, 0);
         ParseEngine<extra::EventHandlerInts> parser(&handler);
@@ -74,7 +74,7 @@ void test_expected_error_tree_from_yaml(ExpectedErrorType errtype, TestCaseFlags
     {
         Tree tree = {};
         ExpectError::check_error(errtype, &tree, [&]{
-            std::string copy = parsed_yaml;
+            std::vector<char> copy(parsed_yaml.begin(), parsed_yaml.end()); // g++ 4.8 fails with std::string
             EventHandlerTree handler(&tree, tree.root_id());
             ASSERT_EQ(&tree, handler.m_tree);
             ParseEngine<EventHandlerTree> parser(&handler);
@@ -93,7 +93,7 @@ void test_engine_testsuite_from_yaml(EngineEvtTestCase const& test_case, std::st
     extra::EventHandlerTestSuite handler(&sink);
     handler.reset();
     ParseEngine<extra::EventHandlerTestSuite> parser(&handler, test_case.opts);
-    std::string copy = parsed_yaml;
+    std::vector<char> copy(parsed_yaml.begin(), parsed_yaml.end()); // g++ 4.8 fails with std::string
     parser.parse_in_place_ev("(testyaml)", to_substr(copy));
     csubstr result = sink;
     _c4dbgpf("~~~\n{}~~~\n", result);
@@ -180,7 +180,7 @@ void test_engine_tree_from_yaml(EngineEvtTestCase const& test_case, std::string
     ParseEngine<EventHandlerTree> parser(&handler, test_case.opts);
     ASSERT_EQ(&handler, parser.m_evt_handler);
     ASSERT_EQ(&tree, parser.m_evt_handler->m_tree);
-    std::string copy = yaml;
+    std::vector<char> copy(yaml.begin(), yaml.end()); // g++ 4.8 fails with std::string
     parser.parse_in_place_ev("(testyaml)", to_substr(copy));
     #ifdef RYML_DBG
     print_tree("parsed_tree", tree);