了解Scheme宏的来源:define-syntax和syntax-rules。 Scheme是一种编程语言,它的宏系统是基于define-syntax和syntax-rules的。在Scheme中,宏是一种特殊的语法形式,它允许用户扩展语言的语法。宏可以用来定义新的语法形式,或者用来修改已有的语法形式。 define-syntax是定义宏的基本方法,它接受两个参数:宏的名称和...
scheme目前其实有至少三套宏系统: 完全hygiene的syntax-rules(define-syntax) 可以hygiene也可以dirty的syntax-case(define-syntax) 逐步被淘汰的lisp传统宏系统define-macro(有些实现里叫defmacro) syntax-rules的能力是受限的,不能引入新的syntax-object,只能写一些简单的宏.但是用syntax-rules写出来的宏肯定比用syntax...
Ruby RulesLanguage Rust Sas Scala Scheme Scilab Scss Shell Smali SmallTalk Sml Sqf Sql Stan Stata Step21 Stylus Subunit Swift TaggerScript Tap Tcl Tex Thrift Tp Twig TypesSript VBNet VBScript Html Vala VbScript Verilog Vhdl Vim XQuery Xl Xml Yaml Zephir x86asm...
scheme nounstudies of the rules for forming admissible sentences Related Words linguistics grammar generative grammar Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.Want to thank TFD for its existence? Tell a friend about us, add a link to this ...
谈到Scheme 的独特之处,除了它那极简语法的s-expression外,就是与众不同但又威力强大的宏,或者说是语法拓展(syntactic-extension)了。本文除了作为我对 syntax-rules 的学习总结之外,其实更多的是对宏这一机制的理解与思考。 我目前学过 C、scheme、python,对 perl 和 javascrpit 有所了解,以我浅薄的编程学习经...
的这一部分。 syntax-case 的发明者是 chez-scheme 的作者 Kent,据他所说,syntax-case 的功能比 syntax-rules要强很多。强大自然也要有相应的代价,那就是很难写。参考资料【10】是这样说的: syntax-case 非常强大,既可以支持高级宏,也可以支持过程宏,并且可以处理卫生和不卫生。 但是的代价是这个宏...
4. Define Syntax Rules Create rules for each language element you want to highlight. For example: Keywords: if, else, function, return Operators: +, -, *, /, = Strings: Enclosed in " " or ' ' Comments: Single-line (// or #) and multi-line (/* */) ...
9 RegisterLog in Sign up with one click: Facebook Twitter Google Share on Facebook syntax directed translation A technique where the structure of a language processor (e.g. a compiler) is based on the structure of the language'sabstract syntax. There might be one procedure in the translator...
Generally, once you come up with a scheme that you like, you can set it up in your .vimrc file, and it will load automatically.Troubleshooting Syntax HighlightingOccasionally there will be minor problems with syntax highlighting. I come across three of them the most often....
beginforms containing zero or more definitions,let-syntaxandletrec-syntaxforms expanding into zero or more definitions, and derived definitions. Derived definitions aresyntactic extensions that expand into some form of definition. A transformer expression is asyntax-rulesform or some other expression that...