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Root base class for the type hierarchy

Meta types in the type class hierarchy that have no parent class are difficult to handle generically. For example, to write a function that operates on all meta types, you would need a way to iterate over all of them.

To solve this, when constructing meta information, any class without a parent class is assigned adam as its parent. This allows accessing all types through adam.

Usage

Example of iterating over all types:

// Without adam, how would you get all types?
// You'd have to manually collect them:
vector<type> how_to_get_all_meta_types() {
    vector<type> ret;
    ret.push_back(ttype<A>());
    ret.push_back(ttype<B>());
    // ... exhaustively list all types
    return ret;
}
 
// With adam, you can simply iterate:
for(const auto& t : ttype<adam>().getSubs())
    cout << t.getName() << "\n";

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/home/runner/work/byeol/byeol/module/meta/type/adam.hpp