A Sound Type System for Typing Runtime Errors

• Item type: Trans(1)
• 公開日: 2012-03-30
• タイトル: A Sound Type System for Typing Runtime Errors
• タイトル / 言語: en
• タイトル: A Sound Type System for Typing Runtime Errors
• 言語: eng
• キーワード / 主題Scheme: Other
• キーワード / 主題: 通常論文
• 資源タイプ / 資源タイプ識別子: http://purl.org/coar/resource_type/c_6501
• 資源タイプ: journal article
• 著者所属: Graduate School of Information Science, Nagoya University
• 著者所属: Graduate School of Information Science, Nagoya University
• 著者所属: Graduate School of Information Science, Nagoya University
• 著者所属: Graduate School of Information Science, Nagoya University
• 著者所属: Graduate School of Information Science, Nagoya University
• 著者所属(英): en
• 著者所属(英): Graduate School of Information Science, Nagoya University
• 著者所属(英): en
• 著者所属(英): Graduate School of Information Science, Nagoya University
• 著者所属(英): en
• 著者所属(英): Graduate School of Information Science, Nagoya University
• 著者所属(英): en
• 著者所属(英): Graduate School of Information Science, Nagoya University
• 著者所属(英): en
• 著者所属(英): Graduate School of Information Science, Nagoya University
• 著者名: Akihisa, Yamada; Keiichirou, Kusakari; Toshiki, Sakabe; Masahiko, Sakai; Naoki, Nishida
• 著者名(英): Akihisa, Yamada; Keiichirou, Kusakari; Toshiki, Sakabe; Masahiko, Sakai; Naoki, Nishida
• 論文抄録 / 内容記述タイプ: Other
• 論文抄録 / 内容記述: Dynamically typed languages such as Scheme are widely adopted because of their rich expressiveness. However, there is the drawback that dynamic typing cannot detect runtime errors at compile time. In this paper, we propose a type system which enables static detection of runtime errors. The key idea of our approach is to introduce a special type, called the error type, for expressions that cause runtime errors. The proposed type system brings out the benefit of the error type with set-theoretic union, intersection and complement types, recursive types, parametric polymorphism and subtyping. While existing type systems usually ensure that evaluation never causes runtime errors for typed expressions, our system ensures that evaluation always causes runtime errors for expressions typed with the error type. Likewise, our system also ensures that evaluation never causes errors for expressions typed with any type that does not contain the error type. Under the usual definition of subtyping, it is difficult to syntactically prove the soundness of our type system. We redefine subtyping by introducing the notion of intransitive subtyping, and syntactically prove the soundness under the new definition.
• 論文抄録(英) / 内容記述タイプ: Other
• 論文抄録(英) / 内容記述: Dynamically typed languages such as Scheme are widely adopted because of their rich expressiveness. However, there is the drawback that dynamic typing cannot detect runtime errors at compile time. In this paper, we propose a type system which enables static detection of runtime errors. The key idea of our approach is to introduce a special type, called the error type, for expressions that cause runtime errors. The proposed type system brings out the benefit of the error type with set-theoretic union, intersection and complement types, recursive types, parametric polymorphism and subtyping. While existing type systems usually ensure that evaluation never causes runtime errors for typed expressions, our system ensures that evaluation always causes runtime errors for expressions typed with the error type. Likewise, our system also ensures that evaluation never causes errors for expressions typed with any type that does not contain the error type. Under the usual definition of subtyping, it is difficult to syntactically prove the soundness of our type system. We redefine subtyping by introducing the notion of intransitive subtyping, and syntactically prove the soundness under the new definition.
• 書誌レコードID / 収録物識別子タイプ: NCID
• 書誌レコードID / 収録物識別子: AA11464814
• 書誌情報: 情報処理学会論文誌プログラミング（PRO）; 巻 5, 号 2, p. 16-24, 発行日 2012-03-30
• ISSN / 収録物識別子タイプ: ISSN
• ISSN / 収録物識別子: 1882-7802
• 出版者 / 言語: ja
• 出版者: 情報処理学会