From 150ea379c8b7802f3fd4de5d84f05caee98cc1bd Mon Sep 17 00:00:00 2001
From: Bo Chen <bo@enway.ai>
Date: Tue, 13 Feb 2024 13:11:12 +0100
Subject: [PATCH] Add support to concat strings and numbers in scripting.
 Solves #766

---
 include/behaviortree_cpp/scripting/operators.hpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/behaviortree_cpp/scripting/operators.hpp b/include/behaviortree_cpp/scripting/operators.hpp
index 3b1f323f7..2aed0fb06 100644
--- a/include/behaviortree_cpp/scripting/operators.hpp
+++ b/include/behaviortree_cpp/scripting/operators.hpp
@@ -252,7 +252,9 @@ struct ExprBinaryArithmetic : ExprBase
         }
       }
     }
-    else if (rhs_v.isString() && lhs_v.isString() && op == plus)
+    else if (op == plus && ((rhs_v.isString() && lhs_v.isString()) ||
+                            (rhs_v.isString() && lhs_v.isNumber()) ||
+                            (rhs_v.isNumber() && lhs_v.isString())))
     {
       return Any(lhs_v.cast<std::string>() + rhs_v.cast<std::string>());
     }