order: Convenience methods for Order

Author: bluss

src/order.rs

@@ -20,4 +20,27 @@ impl Order {
 
     /// "A"  is an alias for automatic ordering
     pub const A: Order = Order::Automatic;
+
+    /// Return Order::RowMajor if the input is true, Order::ColumnMajor otherwise
+    #[inline]
+    pub fn use_c(use_c: bool) -> Order {
+        if use_c { Order::C } else { Order::F }
+    }
+
+    /// Return Order::ColumnMajor if the input is true, Order::RowMajor otherwise
+    #[inline]
+    pub fn use_f(use_f: bool) -> Order {
+        Self::use_c(!use_f)
+    }
+
+    /// Return the transpose: row major becomes column major and vice versa.
+    /// Note that automatic stays automatic.
+    #[inline]
+    pub fn transpose(self) -> Order {
+        match self {
+            Order::RowMajor => Order::ColumnMajor,
+            Order::ColumnMajor => Order::RowMajor,
+            Order::Automatic => Order::Automatic,
+        }
+    }
 }