From: Mikko Rasa <tdb@tdb.fi>
Date: Fri, 24 May 2019 16:58:39 +0000 (+0300)
Subject: Add a version of get_item that dynamic_casts the result
X-Git-Url: http://git.tdb.fi/?p=libs%2Fcore.git;a=commitdiff_plain;h=6fe08a456236d5c0f0231df2d50783d2b529b831

Add a version of get_item that dynamic_casts the result
---

diff --git a/source/core/maputils.h b/source/core/maputils.h
index 2495a1e..66b4e3b 100644
--- a/source/core/maputils.h
+++ b/source/core/maputils.h
@@ -74,6 +74,12 @@ const typename T::mapped_type &get_item(const T &map, const typename T::key_type
 	return i->second;
 }
 
+template<typename D, typename T>
+D *get_item(const T &map, const typename T::key_type &key)
+{
+	return dynamic_cast<D *>(get_item(map, key));
+}
+
 template<typename T>
 typename T::iterator insert_unique(T &map, const typename T::key_type &key, const typename T::mapped_type &item)
 {