Eval location

src/twopass.rs

@@ -293,8 +293,15 @@ impl Eval for ast::Constant {
 impl Eval for Location {
 	fn eval(&self, ctx: &RunContext) -> types::Value {
 		match self {
-			Location::Variable { id } => todo!(),
-			Location::Field { table, index } => todo!(),
+			Location::Variable { id } => ctx.var(*id).get(),
+			Location::Field { table, index } => {
+				let table = table.eval(ctx).expect("attempt to index a nil value");
+				let index = index.eval(ctx).expect("attempt to index with a nil value");
+				let types::ValueInner::Table(table) = table else {
+					panic!("attempt to index a non-table");
+				};
+				table.get(index)
+			}
 		}
 	}
 }