[feat] common-tools: add trait merge

lib/tools/common-tools/src/lib.rs

@@ -28,4 +28,4 @@
 
 pub mod fns;
 pub mod macros;
-use std::io::Write;
+pub mod traits;

lib/tools/common-tools/src/traits/merge.rs

+//  Copyright (C) 2019  Éloïs SANCHEZ
+//
+// 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, either version 3 of the
+// License, or (at your option) any later version.
+//
+// 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 <https://www.gnu.org/licenses/>.
+
+//! Trait Merge.
+
+/// Merge two instances of same type
+pub trait Merge {
+    /// Merge two instances of same type
+    fn merge(self, other: Self) -> Self;
+}

lib/tools/common-tools/src/traits/mod.rs

+//  Copyright (C) 2019  Éloïs SANCHEZ
+//
+// 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, either version 3 of the
+// License, or (at your option) any later version.
+//
+// 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 <https://www.gnu.org/licenses/>.
+
+//! Common rust traits for DURS project.
+
+pub mod merge;