Guess I should put this under version control LOL

styles/src/stretch/mod.rs

@@ -0,0 +1,35 @@
+pub mod geometry;
+pub mod node;
+pub mod number;
+pub mod result;
+
+mod algo;
+mod id;
+
+pub use crate::node::Stretch;
+
+use core::any::Any;
+
+#[derive(Debug)]
+pub enum Error {
+    InvalidNode(node::Node),
+    Measure(Box<Any>),
+}
+
+impl std::fmt::Display for Error {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        match *self {
+            Error::InvalidNode(ref node) => write!(f, "Invalid node {:?}", node),
+            Error::Measure(_) => write!(f, "Error during measurement"),
+        }
+    }
+}
+
+impl std::error::Error for Error {
+    fn description(&self) -> &str {
+        match *self {
+            Error::InvalidNode(_) => "The node is not part of the stretch instance",
+            Error::Measure(_) => "Error occurred inside a measurement function",
+        }
+    }
+}