I have a class: class SymbolIndexer { protected: SymbolIndexer ( ) { } public: static inline SymbolIndexer & GetUniqueInstance ( ) { static SymbolIndexer uniqueinstance_ ; return uniqueinstance_ ; } }; How should I modify it to disable code like: SymbolIndexer symbol_indexer_ = SymbolIndexer::GetUniqueInstance ( ); and only allow code like: SymbolIndexer & ref_symbol_indexer_ = … Read more
What is this idiom and when should it be used? Which problems does it solve? Does the idiom change when C++11 is used? Although it’s been mentioned in many places, we didn’t have any singular “what is it” question and answer, so here it is. Here is a partial list of places where it was … Read more
What does copying an object mean? What are the copy constructor and the copy assignment operator? When do I need to declare them myself? How can I prevent my objects from being copied? 8 Introduction C++ treats variables of user-defined types with value semantics. This means that objects are implicitly copied in various contexts, and … Read more
There are 2 good reasons for using a copy constructor instead of the constructor passing all parameters : when you have a complex object with many attributes it is much simpler to use the copy constructor if you add an attribute to your class, you just change the copy constructor to take this new attribute … Read more
