How to define strong ID types in C++11?
c++, c++11, types
Solution
If youre using boost, try BOOST_STRONG_TYPEDEF
Example from the documentation:
BOOST_STRONG_TYPEDEF(int, a)
void f(int x); // (1) function to handle simple integers
void f(a x); // (2) special function to handle integers of type a
int main(){
int x = 1;
a y;
y = x; // other operations permitted as a is converted as necessary
f(x); // chooses (1)
f(y); // chooses (2)
}
Problem
How to define strong ID types in C++11? It's posible to done alias of integer types but getting warnings from compiler when you mix types? E.g: ``` using monsterID = int; using weaponID = int; auto dragon = monsterID{1}; auto sword = weaponID{1}; dragon = sword; // I want a compiler warning here!! if( dragon == sword ){ // also I want a compiler warning here!! // you should not mix weapons with monsters!!! } ```