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What (who) is subtype - definition
subtype
WIKIMEDIA DISAMBIGUATION PAGE
Subtype (disambiguation)
<programming> If S is a subtype of T then an expression of
type S may be used anywhere that one of type T can and an
implicit type conversion will be applied to convert it to
type T.
In object oriented programming, this means that objects of
type S must accept every message that one of type T would.
(1997-07-28)
subtype
WIKIMEDIA DISAMBIGUATION PAGE
Subtype (disambiguation)
¦ noun a secondary or subordinate type.
Subtyping
A FORM OF TYPE POLYMORPHISM
Subtypes; Subtyping (object-oriented programming); Supertype; Subtype and derived type; Interface inheritance; Subtyping of functions; Subtype (computing); Inclusion polymorphism; Subtyping polymorphism; Subtype polymorphism
In programming language theory, subtyping (also subtype polymorphism or inclusion polymorphism) is a form of type polymorphism in which a subtype is a datatype that is related to another datatype (the supertype) by some notion of substitutability, meaning that program elements, typically subroutines or functions, written to operate on elements of the supertype can also operate on elements of the subtype. If S is a subtype of T, the subtyping relation (written as , ,Copestake, Ann.
Examples of use of subtype
1. We have sent 321 samples to Italy to find out about the subtype.
2. The letters H and N in subtype names like H5N1 refer to these proteins –– this flu subtype has an HA 5 (H5) protein and an NA 1 (N1) protein.
3. They have tested positive for an H5 subtype of the virus.
4. "We now know that this one special subtype of tumor is the bad player here.
5. The most virulent are H5 and H7, while the H5N1 subtype is the deadliest.