From be37a4ed4059ce79321c5e3f2438934866ec7be5 Mon Sep 17 00:00:00 2001
From: Nathan Reiner <nathan@nathanreiner.xyz>
Date: Fri, 19 Jan 2024 20:14:57 +0100
Subject: add function_cache for performence gain

---
 src/math/expression.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'src/math/expression.rs')

diff --git a/src/math/expression.rs b/src/math/expression.rs
index 049886d..14a3eb8 100644
--- a/src/math/expression.rs
+++ b/src/math/expression.rs
@@ -4,6 +4,7 @@ use super::function::FunctionArgument;
 use super::string::{ContainsAndSkipBrackets, SplitMatchingBracket};
 use super::operation::Operation;
 
+#[derive(PartialEq, Eq, Hash, Clone)]
 enum ExpressionType {
     Value(Complex),
     Variable(String),
@@ -17,7 +18,7 @@ impl Default for ExpressionType {
     }
 }
 
-#[derive(Default)]
+#[derive(Default, PartialEq, Eq, Hash, Clone)]
 pub struct Expression {
     expr_type: ExpressionType,
     repr: String,
-- 
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