Add debuglog.

src/log.hpp

@@ -0,0 +1,35 @@
+/*  This file is part of mastodonpp.
+ *  Copyright © 2020 tastytea <tastytea@tastytea.de>
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as published by
+ *  the Free Software Foundation, version 3.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Affero General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Affero General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef MASTODONPP_LOG_HPP
+#define MASTODONPP_LOG_HPP
+
+#include <iostream>
+
+namespace mastodonpp
+{
+
+using std::cerr;
+
+#ifndef NDEBUG
+    #define debuglog cerr << "[" << __FILE__ << ":" << __LINE__ << "] DEBUG: "
+#else
+    #define debuglog false && cerr
+#endif
+
+} // namespace mastodonpp
+
+#endif  // MASTODONPP_LOG_HPP