delete undesired default members instead of making them inaccessible

unittest/force-styles/test_config.h

@@ -15,8 +15,8 @@
 #define TEST_CONFIG_H
 
 #include <set>
-#include <string>
 #include <sstream>
+#include <string>
 #include <utility>
 #include <vector>
 
@@ -96,7 +96,8 @@ public:
         restart_vel.clear();
         global_vector.clear();
     }
-    virtual ~TestConfig(){};
+    TestConfig(const TestConfig &) = delete;
+    TestConfig &operator=(const TestConfig &) = delete;
 
     std::string tags_line() const
     {
@@ -110,9 +111,6 @@ public:
         }
         return "generated";
     }
-
-private:
-    TestConfig(const TestConfig &){};
 };
 
 #endif

unittest/force-styles/test_config_reader.h

@@ -22,6 +22,8 @@ class TestConfigReader : public YamlReader<TestConfigReader> {
 
 public:
     TestConfigReader(TestConfig &config);
+    TestConfigReader() = delete;
+    const TestConfigReader & operator=(TestConfig &) = delete;
 
     void skip_tests(const yaml_event_t &event);
     void prerequisites(const yaml_event_t &event);

unittest/force-styles/yaml_writer.h

@@ -22,6 +22,9 @@ class YamlWriter {
 public:
     YamlWriter(const char *outfile);
     virtual ~YamlWriter();
+    YamlWriter() = delete;
+    YamlWriter(const YamlWriter &) = delete;
+    const YamlWriter & operator=(const YamlWriter &) = delete;
 
     // emitters
     void emit(const std::string &key, const double value);
@@ -34,10 +37,6 @@ private:
     FILE *fp;
     yaml_emitter_t emitter;
     yaml_event_t event;
-
-private:
-    YamlWriter(){};
-    YamlWriter(const YamlWriter &){};
 };
 
 #endif