方案环境:动态变量

ACM SIGPLAN Lisp Pointers Pub Date : 1987-08-01 DOI:10.1145/1317203.1317208

William D. Clinger

{"title":"方案环境:动态变量","authors":"William D. Clinger","doi":"10.1145/1317203.1317208","DOIUrl":null,"url":null,"abstract":"Scheme variables have static scope and indefinite extent. That is, the visibility (or scope) of a Scheme variable can be determined statically by looking at the lexical structure of a program, and the lifetime (or extent) of the variable is unbounded. The reason variables have indefinite extent in Scheme is that they may be remembered by procedures created as the result of evaluating a lambda expression.","PeriodicalId":262740,"journal":{"name":"ACM SIGPLAN Lisp Pointers","volume":"62 3","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1987-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"The scheme environment: dynamic variables\",\"authors\":\"William D. Clinger\",\"doi\":\"10.1145/1317203.1317208\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Scheme variables have static scope and indefinite extent. That is, the visibility (or scope) of a Scheme variable can be determined statically by looking at the lexical structure of a program, and the lifetime (or extent) of the variable is unbounded. The reason variables have indefinite extent in Scheme is that they may be remembered by procedures created as the result of evaluating a lambda expression.\",\"PeriodicalId\":262740,\"journal\":{\"name\":\"ACM SIGPLAN Lisp Pointers\",\"volume\":\"62 3\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1987-08-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"ACM SIGPLAN Lisp Pointers\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1145/1317203.1317208\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACM SIGPLAN Lisp Pointers","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1145/1317203.1317208","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 1

摘要

方案变量具有静态范围和无限范围。也就是说，Scheme变量的可见性(或范围)可以通过查看程序的词法结构来静态地确定，并且变量的生存期(或范围)是无限的。在Scheme中，变量具有不确定范围的原因是，作为lambda表达式求值的结果而创建的过程可能会记住它们。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

The scheme environment: dynamic variables

Scheme variables have static scope and indefinite extent. That is, the visibility (or scope) of a Scheme variable can be determined statically by looking at the lexical structure of a program, and the lifetime (or extent) of the variable is unbounded. The reason variables have indefinite extent in Scheme is that they may be remembered by procedures created as the result of evaluating a lambda expression.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

ACM SIGPLAN Lisp Pointers

自引率

0.00%

发文量