1 files changed, 2 insertions, 2 deletions
diff --git a/include/lexer.hpp b/include/lexer.hpp
index e674999..27779ea 100644
--- a/include/lexer.hpp
+++ b/include/lexer.hpp
@@ -33,7 +33,7 @@ enum token_type{
 struct Token{
   token_type type;
   std::string value;
-  Token(token_type type, std::string value) : type(type), value(value){}
+  Token(token_type type, const std::string &value) : type(type), value(value){}
 };
 
 class Lexer{
@@ -42,7 +42,7 @@ private:
   std::string text;
   size_t current_char;
   Token current_token;
-  bool matchFunction(std::string function_name);
+  bool matchFunction(const std::string &function_name);
   std::string createNumber();
 public:
   Lexer(std::string text = {});