redef meth is_valid do return _bound != null and _bound.is_valid
# The name of the type
- readable attr _name: Symbol
+ readable attr _name: Symbol
# The type refered
- meth bound: MMType
- do
- assert is_valid
- return _bound
- end
- attr _bound: MMType
+ meth bound: MMType do return _bound.as(not null)
+ attr _bound: nullable MMType
- redef meth <(t) do return t != null and (t == self or t.is_supertype(_bound))
+ redef meth <(t) do return t == self or t.is_supertype(bound)
redef meth is_supertype(t) do return _bound.is_supertype(t)
redef meth is_nullable do return _bound.is_nullable
redef meth direct_type do return _bound.direct_type
redef meth to_s do return _name.to_s
- protected init(name: Symbol, bound: MMType)
+ protected init(name: Symbol, bound: nullable MMType)
do
_name = name
_bound = bound