Fix #271: better error message

facontidavide · facontidavide · commit edd673194100 · 2023-06-07T10:49:01.000+02:00
diff --git a/include/behaviortree_cpp/blackboard.h b/include/behaviortree_cpp/blackboard.h
@@ -139,6 +139,11 @@ class Blackboard
   {
     if (auto any_ref = getAnyLocked(key))
     {
+      const auto& any = any_ref.get();
+      if(any->empty())
+      {
+        throw RuntimeError("Blackboard::get() error. Entry [", key, "] hasn't been initialized, yet");
+      }
       return any_ref.get()->cast<T>();
     }
     else

Original file line number	Diff line number	Diff line change
`@@ -139,6 +139,11 @@ class Blackboard`
`139`	`139`	`{`
`140`	`140`	`if (auto any_ref = getAnyLocked(key))`
`141`	`141`	`{`
	`142`	`+ const auto& any = any_ref.get();`
	`143`	`+ if(any->empty())`
	`144`	`+ {`
	`145`	`+ throw RuntimeError("Blackboard::get() error. Entry [", key, "] hasn't been initialized, yet");`
	`146`	`+ }`
`142`	`147`	`return any_ref.get()->cast<T>();`
`143`	`148`	`}`
`144`	`149`	`else`