QuestionsAndAnswers
If you have a question, not answered here, please add it with a new empty section with your question used as section title.
Here is an example:
== What is your question? ==
Why does cppcheck complain about my assignment operators?
There is a message assignment operator operatorEq: foo::operator=' should return 'foo &. It indicates that your assignment operator may have unexpected behaviour. Three patterns can be found frequently, differing by the return type to be void, a const reference or a non-const reference. Depending on this signature the properties are quite different, as the example code shows:
class Foo_void { public: void operator = (const Foo_void &rhs) { /*do some assignment of members here*/ return; } // member declarations here }; class Foo_constref { public: const Foo_constref & operator = (const Foo_constref &rhs) { /*do some assignment of members here */ return *this; } // member declarations here }; class Foo_ref { public: Foo_ref & operator = (const Foo_ref &rhs) { /*do some assignment of members here */ return *this; } // member declarations here }; void test() { Foo_void foo_void1, foo_void2, foo_void3; (foo_void1=foo_void2)=foo_void3; // <-- does not compile Foo_constref foo_constref1, foo_constref2, foo_constref3; (foo_constref1=foo_constref2)=foo_constref3; // <-- does not compile Foo_ref foo_ref1, foo_ref2, foo_ref3; (foo_ref1=foo_ref2)=foo_ref3; // <-- that does compile }
The last implementation (non-const reference) is the most versatile and there recommend by Scott Meyers in his Effective C++ books.
What keywords are defined for tickets in the tracker?
For usage and some prominent examples read KeywordsForTickets. If you are searching for the meaning of a specific keyword, ask by adding it to the definition list.
