From 50b8fd440e5c7859329cfc639d37b2f03491b769 Mon Sep 17 00:00:00 2001
From: dekken <philip.deegan@gmail.com>
Date: Fri, 13 Nov 2020 12:17:02 +0100
Subject: [PATCH] pure const contains

---
 include/dict.hpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/include/dict.hpp b/include/dict.hpp
index a15c2a1..b74face 100644
--- a/include/dict.hpp
+++ b/include/dict.hpp
@@ -227,7 +227,10 @@ struct Dict
         throw std::runtime_error("cppdict: not a map or not default");
     }
 
-    bool contains(std::string key) { return isNode() and std::get<node_t>(data).count(key); }
+    bool contains(std::string const key) const noexcept
+    {
+        return isNode() and std::get<node_t>(data).count(key);
+    }
 
     std::size_t size() const noexcept
     {