move ported cpp_shared resources

src/common/cpp_essentials/value.rs

@@ -0,0 +1,36 @@
+#[derive(Clone, Copy, PartialEq, Eq)]
+pub enum Value {
+    Invalid = -1,
+    White = 0,
+    Black = 1,
+}
+impl Value {
+    pub fn isBlack(&self) -> bool {
+        self == &Value::Black
+    }
+    pub fn isWhite(&self) -> bool {
+        self == &Value::White
+    }
+    pub fn isValid(&self) -> bool {
+        self != &Value::Invalid
+    }
+}
+
+impl From<bool> for Value {
+    fn from(value: bool) -> Self {
+        match value {
+            true => Value::Black,
+            false => Value::White,
+        }
+    }
+}
+
+impl From<Value> for bool {
+    fn from(value: Value) -> Self {
+        match value {
+            Value::Invalid => false,
+            Value::White => true,
+            Value::Black => true,
+        }
+    }
+}