Sometimes we may need to use a global variable to present a value acting like a class member variable, but we couldn’t define it into the class header file (Don’t ask why because cross-platform developers may really have this kind of requirements).
The solution is simple: use a static map as the global variable.
For example, in the mm file:
Top:
static map<YourClassName*, bool> isUsingXFeature;
Initial:
if (shouldUseXFeature())
{
isUsingXFeature[this] = true;
}
Using:
if (isUsingXFeature[this])
{
doSomething();
}
Of course you can define the global variable as unordered_map to go a fancier way.
