https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61075
--- Comment #8 from Denes Matetelki <denes.matetelki at gmail dot com> ---
Just an observation:
The contained type also need to declare and define ctor(int).
Which can be tricky, if it is a template class and:
template <typename T>
class Custom
{
public:
Custom(T t) : m_t(t) {}
Custom(int i) : m_t() {}
explicit operator int() const { return convertToInt(m_t); }
private:
T m_t;
};
Custom<int> c; // ambigous ctor(int)
