From 20a11fb5ecac91e723866e03fead9e17c311c344 Mon Sep 17 00:00:00 2001
From: Alvin Zhang <41vin2h4n9@gmail.com>
Date: Sun, 1 Dec 2024 10:08:23 -0800
Subject: [PATCH] feat: prevent expressions from being copied

---
 include/suboptimal/autodiff/Expression.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/include/suboptimal/autodiff/Expression.h b/include/suboptimal/autodiff/Expression.h
index 862e3a8..a3bc557 100644
--- a/include/suboptimal/autodiff/Expression.h
+++ b/include/suboptimal/autodiff/Expression.h
@@ -61,6 +61,16 @@ struct Expression {
              AdjointValueFunc rhs_adjoint_value_func, AdjointExprFunc lhs_adjoint_expr_func,
              AdjointExprFunc rhs_adjoint_expr_func, ExpressionPtr lhs, ExpressionPtr rhs);
 
+  Expression(const Expression& other) = delete;
+
+  Expression(Expression&& other) = default;
+
+  Expression& operator=(const Expression& other) = delete;
+
+  Expression& operator=(Expression&& other) = default;
+
+  ~Expression() = default;
+
   /**
    * Checks if the value of this expression is independent of any other expressions
    */