main-slow_refactor-Identifier
Ensure Range::field member variables are initialised at declaration, then apply 'rule-of-zero' by deleting copy c'tor, move c'tor and copy assignment operator. Default c'tor defaulted. One test added.
Ensure Range::field member variables are initialised at declaration, then apply 'rule-of-zero' by deleting copy c'tor, move c'tor and copy assignment operator. Default c'tor defaulted. One test added.