Preliminary state

src/interpreters/eval.rs

@@ -0,0 +1,24 @@
+use crate::{
+    core::{Primitive, Value},
+    interpreters::Interpreter,
+};
+
+struct EvalInterpreter {}
+
+impl Interpreter for EvalInterpreter {
+    fn process_primitive(&mut self, primitive: Primitive) -> Box<dyn Value> {
+        use Primitive::*;
+        Box::new(match primitive {
+            Neg(x) => -x,
+            Reciprocal(x) => 1. / x,
+            Add(x, y) => x + y,
+            Mul(x, y) => x * y,
+            Sq(x) => x * x,
+            Sqrt(x) => x.sqrt(),
+            Ln(x) => x.ln(),
+            Exp(x) => x.exp(),
+            Dot(A, B) => A.dot(&B),
+            ReLU(x) => x.max(0.),
+        })
+    }
+}