only provide reference to edge weight

Author: Smona

dasp_graph/src/node/mod.rs

@@ -93,7 +93,7 @@ pub trait Node<W = ()> {
 pub struct Input<W = ()> {
     buffers_ptr: *const Buffer,
     buffers_len: usize,
-    pub edge_weight: W,
+    edge_weight: W,
 }
 
 impl<W> Input<W> {
@@ -115,6 +115,11 @@ impl<W> Input<W> {
         // alive.
         unsafe { std::slice::from_raw_parts(self.buffers_ptr, self.buffers_len) }
     }
+
+    /// A reference to the input's edge weight.
+    pub fn edge_weight(&self) -> &W {
+        &self.edge_weight
+    }
 }
 
 // Inputs can only be created by the `dasp_graph::process` implementation and only ever live as