C++ Tutorial/Operator Overloading/enum operator
Overloading operators for enumerations
<source lang="cpp">#include <string>
- include <iostream>
- include <ostream>
- include <cstdlib>
enum Week { Monday=0, Tuesday=1, Wednesday=2, Friday=4 }; // Explicitly cast to int, to avoid infinite recursion. inline Week operator|(Week a, Week b) {
return Week(int(a) | int(b));
} inline Week& operator|=(Week& a, Week b) {
a = a | b; return a;
} inline Week operator&(Week a, Week b) {
return Week(int(a) & int(b));
} inline Week& operator&=(Week& a, Week b) {
a = a & b; return a;
} inline Week operator^(Week a, Week b) {
return Week(int(a) ^ int(b));
} inline Week& operator^=(Week& a, Week b) {
a = a ^ b; return a;
} inline Week operator~(Week a) {
return Week(~int(a));
} bool error() {
return std::rand() 2 != 0;
} int main() {
Week a = Monday; std::cout << a << std::endl; a |= Tuesday; std::cout << a;
}</source>
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