martinzink commented on code in PR #1612:
URL: https://github.com/apache/nifi-minifi-cpp/pull/1612#discussion_r1270534444
##########
libminifi/include/utils/FlatMap.h:
##########
@@ -138,7 +134,9 @@ class FlatMap{
return data_.size();
}
- V& operator[](const K& key) {
+ template<typename T>
+ requires std::constructible_from<K, T> && std::equality_comparable_with<K, T>
Review Comment:
operator[] insert a default constructred value at the specified key if its
not already there. for that we need to create the actual keytype thats why we
need the constraint
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