subtyping การใช้

• Functional programming languages often allow the subtyping of system F.
• Subtyping enables a given type to be substituted for another type or abstraction.
• The subtyping relationship is preserved between the types automatically.
• In such cases, resected tumors should be classified by comprehensive histological subtyping.
• Subtyping between lifetimes is determined by the " outlives " relation.
• The type-theoretic foundations of polymorphism are closely related to those of subtyping.
• Subtyping is therefore a form of type polymorphism.
• The concept of subtyping is related to the linguistic notions of hyponymy and holonymy.
• Sound structural subtyping rules for types other than object types are also well known.
• But these DNA banding-based subtyping methods do not provide meaningful evolutionary analyses.
• The main idea is that consistency and subtyping are orthogonal ideas that compose nicely.
• Also other forms of subtyping ( besides inheriting subclasses ) were introduced in Simula derivatives.
• Due to the subtyping relation, a term may belong to more than one type.
• Inheritance should not be confused with subtyping.
• The subtyping of mutable references is similar to the treatment of function arguments and return values.
• This is referred to as subtyping.
• Some systems also support subtyping of labeled disjoint union types ( such as algebraic data types ).
• The relationship can be expressed explicitly via inheritance in languages that support inheritance as a subtyping mechanism.
• Robert Meersman extended the approach by adding subtyping, and introducing the first truly conceptual query language.
• Liskov's principle imposes some standard requirements on nominal vs . structural subtyping for the distinction ):