Initial commit.

src/message.rs

@@ -0,0 +1,22 @@
+use crate::{Gaussian, N_INF};
+
+#[derive(Debug)]
+pub struct DiffMessages {
+    pub prior: Gaussian,
+    pub likelihood: Gaussian,
+}
+
+impl DiffMessages {
+    pub fn p(&self) -> Gaussian {
+        self.prior * self.likelihood
+    }
+}
+
+impl Default for DiffMessages {
+    fn default() -> Self {
+        Self {
+            prior: N_INF,
+            likelihood: N_INF,
+        }
+    }
+}