If I have a class such as class Foo{ public: Foo(){...} Foo(Foo && rhs){...} operator=(Foo rhs){ swap(*this, rhs);}
Consider: if开发者_高级运维 (a=5) { /* do something */ } How does the assignment work as a condition?
So here is the deal, I think I need to go another route regarding the pattern I am using but I thought I would get some expert opinions first.
The question: Can I define an assignment operator and not the copy constructor? For an internal class (not exposed in the API), is this still a bad design practice?
In C开发者_运维知识库++ what is the idiomatic way to define operator= on a class that should be immutable. For example all its member variables are const.
Can someone justify the need of privatizing the assignment operato开发者_如何转开发r in a Singleton class implementation?
I am puzzled because I cannot figure where my bug/problem is. I have a class Instruction, which uses two custom operators, one assignment and one comparison operator.
I need to assign one of two variables to a third variable, using the value of the second variable if the first is (bool)false or undefined.
While there is quite a few questions about copy constructors/assignment operators on SO already, I did not find an answer that fit my problem.
Are both these PHP statements doing the same thing?: $o =& $thing; $o = &a开发者_运维百科mp;$thing;
加载中,请稍侯......