Foundations of Object-Oriented Languages: Types and Semantics

最新推荐文章于 2024-10-14 15:27:33 发布

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最新推荐文章于 2024-10-14 15:27:33 发布

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分类专栏： Object Oriented 文章标签： types features system lambda 出版 java

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本文探讨了面向对象语言的形式基础，帮助读者理解这些语言的基本概念及其设计决策。通过分析现有面向对象语言的特点，特别是类型系统及表达性的障碍，并介绍子类型与子类两个关键特性。

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In recent years, object-oriented programming has emerged as the dominant computer programming style, and object-oriented languages such as C++ and Java enjoy wide use in academia and industry. This text explores the formal underpinnings of object-oriented languages to help the reader understand the fundamental concepts of these languages and the design decisions behind them. The text begins by analyzing existing object-oriented languages, paying special attention to their type systems and impediments to expressiveness. It then examines two key features: subtypes and subclasses. After a brief introduction to the lambda calculus, it presents a prototypical object-oriented language, SOOL, with a simple type system similar to those of class-based object-oriented languages in common use. The text offers proof that the type system is sound by showing that the semantics preserves typing information. It concludes with a discussion of desirable features, such as parametric polymorphism and a MyType construct, that are not yet included in most statically typed object-oriented languages.
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