Base class for old-style parent objects

CLASS HIERARCHY:

SageObject
Parent
ParentWithBase
ParentWithGens

This came up in some subtle bug once.

sage: gp(2) + gap(3)
5
class sage.structure.parent_old.Parent

Bases: sage.structure.parent.Parent

Parents are the SAGE/mathematical analogues of container objects in computer science.

coerce_map_from_c(S)
has_coerce_map_from_c(S)

Return True if there is a natural map from S to self.

Otherwise, return False.