Reads an identified object whose cookie is neither 3 (constant) nor 0 (node).
Reads an identified object whose cookie is neither 3 (constant) nor 0 (node).
By default this throws an exception. Sub-classes may use a cookie greater
than 3 for other constant types.
The default implementation reads a type Int as operator id Int
which will be resolved using readOpExtension.
The default implementation reads a type Int as operator id Int
which will be resolved using readOpExtension.