C++ enum assignment operator
For the built-in operator, lhs may have any non-const scalar type and rhs must be implicitly convertible to the type of lhs. The direct assignment operator expects a modifiable lvalue as its left operand and an rvalue expression or a braced-init-list (since C++11) as its right operand, and returns an lvalue identifying the left operand after modification. The debugger is showing that returnVar has the same value before and after the AND assignment operator has executed (be that PatientRecord.NoRecord (0) or PatientRecord.SameScreeningDate (2)). why is this, and are there any solutions neater than: returnVar = returnVar & PatientRecord.SameEnrollmentDate; Thanks. enum are just ints, that's why they will always have assignment operator. By the standard by default, the first element of an enum always has 0 as value, and all other elements, after the first one, are previous_value + 1. You can change the value of the first element, of course. Actually, you can give values for each member of the enum. Thanks to @Konrad Rudolph for the comment. C language enum enumeration syntax, C++ enumeration classes and examples. The YoLinux portal covers topics from desktop to servers and from developers to users If you accept the fact that you must keep the definition of one of the two enum coherent to the other, so that each gridBlock takes a value from tetroType then you can override operator== to use them seamlessly in comparisons and override a different operator (eg =) to mimic assignment between different types. enum-key - one of enum, enum class (since C++11), or enum struct (since C++11): attr (C++11): optional sequence of any number of attributes: enum-name - the name of the enumeration that's being declared. If present, and if this declaration is a re-declaration, it may be preceded by nested-name-specifier (since C++11): sequence of names and scope-resolution operators ::, ending with scope. Teams. Q&A for Work. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. In C programming, an enumeration type (also called enum) is a data type that consists of integral constants. To define enums, the enum keyword is used. enum flag const1, const2., constN ; By default, const1 is 0, const2 is 1 and so on. You can change default values of enum elements during declaration (if necessary). Assignment Operators Overloading in C++ - You can overload the assignment operator (=) just as you can other operators and it can be used to create an object just like the copy constructor.
