Convert the attribute value to a double (n encoding).
Synopsis:
#include <qpps/variant.h>
int toDouble( bool *ok = 0 ) const;
Arguments:
- ok
- A reference to a bool for storing the conversion status.
When the reference is non-NULL, the status is set to false if a conversion error occurs; otherwise, it's set to true.
Description:
Convert the attribute value to a double (n encoding).
Returns:
A double containing the attribute's value.