[PDF] An Introduction to Subtyping
a subtype of INTEGER, one could substitute a value in the type [10 TO 20] and The above two requirements define the correct subtyping rule for procedures
[PDF] CS 6110 S18 Lecture 23 Subtyping 1 Introduction 2 - Cornell CS
In Java, this is the type of null 2 1 Products and Sums The subtyping rules for product and sum types are quite intuitive: σ ≤ σ ′
[PDF] Subtypes chapter
An implementation hack for arrays resulted in a desire for this subtyping rule [ Joy98] Page 14 84 5 Understanding Subtypes The subtyping rules for object types
[PDF] Subtyping - Harvard SEAS - Harvard University
Lecture 15: Subtyping Stephen •A subtyping relation T1
[PDF] Records and subtyping Lecture 16 Thursday, March - Harvard SEAS
25 mar 2010 · We extend the syntax, operational semantics, and typing rules of the We can express the principle of subtyping in a typing rule, often referred
[PDF] Subtyping
what does it mean for a type τ to be a subtype of σ? -wherever a value of The rule of subsumption - explicit subtyping (with cast expression (σ)) Γ ⊢ (σ) e : σ
[PDF] A On Subtyping-Relation Completeness, with an Application to Iso
The common subtyping rules for iso-recursive types—the “Amber rules”—are ing (via a subsumption rule in the type system) terms of some type τ1 to stand in
[PDF] Lecture 14 — Subtyping - Washington
Or just use the subsumption rule multiple times Or both In any case, type- checking is no longer syntax-directed: There may be 0, 1, or many
[PDF] Subtyping and Substitutivity
Subtyping 2 Subtyping and substitutability class Rectangle { private int x,y,w,h; New type-checking rule: If e : T and T
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