PPT-Subtyping

Chapter 15 Benjamin Pierce Types and Programming Languages Varieties of Polymorphism Parametric polymorphism A single piece of code is typed generically Imperative or firstclass polymorphism. Subsumption. Some . types . are better . than others, in the . sense that a value . of one can . always safely be used. where a value of . the other . is expected.. Which can be formalized as by introducing: . Lecture 27. Generics vs. Subtyping; Bounded Polymorphism. Dan Grossman. Fall 2011. Today. Compare . generics and . subtyping. What each is good for. Combine generics and subtyping to get even more . benefit. ANALYSIS OF PROG. LANGS. Type . Systems. Instructors: Crista Lopes. Copyright © Instructors.. Polymorphism. Constructs . that can take different . forms.  . poly = many. morph = shape. Types of Polymorphism. Subtypes CSE 331 Autumn 2010 • Sometimes every B is an A – In a library database: • every book is a library holding • every CD is a library holding • Subtyping expre Renementsr::=:::varies:::BasicTypesb::=fv:Intjrgj:::Types::=bjx:!Environment::=;jx:;Subtyping`12Abbreviationsx:frg:=x:fx:Intjrgfxjrg:=fx:Intjrgfrg:=fv:Intjrgfx:fy:Intjrygjrxg:=fx:Intjrx^ry[ / Winter 2016. CSE 331. Software Design and Implementation. Lecture 14. Generics 2. Hi, I’m James!. Big picture. Last time: Generics intro. Subtyping. and Generics. Using . bounds. for more flexible subtyping. Practices. Zhenjiang Hu, . Haiyan. Zhao, Yingfei Xiong. Peking University, Spring Term, 2016. Chap 17. Please refer to the package of “. joinexrercise. ”. Subtype Relation. Records. “Algorithmic” subtype relation. Ravi Chugh. Motivation: Dynamic Languages. Dynamically-typed languages. Enable rapid prototyping. Facilitate inter-language development. Statically-typed languages. Prevent certain run-time errors. Enable optimized execution. Lecture 25. Subtyping for OOP;. Comparing/Combining Generics and Subtyping . Dan Grossman. Winter 2013. Now…. Use what we learned about subtyping for records and functions to understand subtyping for class-based OOP. Ben Greenman, . Fabian Muehlboeck. , and Ross Tate. Cornell University. Typesafe. Equality Generic Lists?. (. Typesafe. ) Equality. @override. public . boolean. equals(Object other) {. . if(other . CSCE 314: Programming Languages . Prof. Lupoli, (much from Dr. . Dylan . Shell). Abstract Data Types (ADTs). Object-oriented programming has its roots in ADTs. ADTs. Encapsulate state along with a set of operations . Ravi Chugh. Motivation: Dynamic Languages. Dynamically-typed languages. Enable rapid prototyping. Facilitate inter-language development. Statically-typed languages. Prevent certain run-time errors. Enable optimized execution. Jason Tackett, Mark Vaughan, Jay Kar, Ali Omar. Altitude (km). dust. polluted dust. dusty marine. clean marine. smoke. Subtype. 532 nm lidar ratio (. sr. ). 1064 nm lidar ratio (. sr. ). Clean marine. OPTN/UNOS Operations and Safety Committee . 2. What . p. roblem will the proposal solve? . Update guidance to keep it . relevant and timely. Address need and questions raised within transplant community .