add notes for the Copy requirement

README.md

@@ -12,7 +12,13 @@
 This crate provides [`DiscreteRangeMap`] and [`DiscreteRangeSet`], Data
 Structures for storing non-overlapping intervals based of [`BTreeMap`].
 
-## Example using [`Range`]s
+## You must implement `Copy`
+
+Due to implementation complications with non-`Copy` types the
+datastructures currently require both the range type and the points
+the ranges are over to be `Copy`.
+
+## Example using an Inclusive-Exclusive range
 
 ```rust
 use range_bounds_map::test_ranges::ie;

rustfmt.toml

@@ -1,4 +1,4 @@
-# todo put back to normal
+# todo this file put back to normal
 # - rename DiscreteRange{Set,Map} to DiscreteRange{Set,Map}
 # - rename crate too
 # - add link to previous crate on readme

src/lib.rs

@@ -20,7 +20,13 @@ along with range_bounds_map. If not, see <https://www.gnu.org/licenses/>.
 //! This crate provides [`DiscreteRangeMap`] and [`DiscreteRangeSet`], Data
 //! Structures for storing non-overlapping intervals based of [`BTreeMap`].
 //!
-//! ## Example using [`Range`]s
+//! ## You must implement `Copy`
+//!
+//! Due to implementation complications with non-`Copy` types the
+//! datastructures currently require both the range type and the points
+//! the ranges are over to be `Copy`.
+//!
+//! ## Example using an Inclusive-Exclusive range
 //!
 //! ```rust
 //! use range_bounds_map::test_ranges::ie;