查询词典 parser

In this article, I will show how the Interpreter pattern can be used to develop a full-featured algebraic expression parser.

在这篇文章中，我将展示如何解释器模式可以用于开发一种功能齐全的代数表达式解析器。

Lexical Analyser - In my first year university programming project one of my missions is to write a parser.

在我大学第一年中，我的一个编程项目是编写一个分析器。

It begins by instantiating an HTML parser object and downloading the APOD page for the new

它首先通过实例化一个HTML解析器对象和下载网页的青苹果，新

An operator precedence parser, capable of common arithmetic expression statements for analysis.

详细说明：一个算符优先分析器，能对常见的算术表达式语句进行分析。

Not detailed in Figure 1 are the parts of the compiler that are not verified yet: upstream, a parser, type-checker and simplifier that generates Clight abstract syntax from C source files and is based on the CIL library21; downstream, a printer for PPC abstract syntax trees in concrete assembly syntax, followed by generation of executable binary using the system's assembler and linker.

图1中没有详细标出的是该编译器中未验证的部分：前面的部分是基于CIL库[21]的语法解析器、类型检查器和语法树化简器，完成从C源代码文件到Clight抽象语法树的生成工作。后面的部分，则是由PPC抽象语法树到具体汇编语法的输出，随后的可执行二进制文件生成部分则采用系统自带的汇编器和链接器。

The Comment Parser generator template comment_p is helper for generating a correct Confix Parser from auxiliary parameters, which is able to parse comment constructs as follows

注释分析器生成器模板 comment_p 是一个用于从附加的参数生成正确的片段分析器的辅助生成器，它可以正确分析类似下面结构的注释

The actor attached to the expr parser has to be re-attached to the (expr - close) parser construct, which will make the resulting confix parser 'do the right thing'.

挂接于 expr 分析器之上的动作器必须重挂接到(expr - close)分析器上，才能使得所产生的片段分析器"行为得当"。

This user routine reads the input stream, recognizing the lower level structures, and communicates these tokens to the parser.

这个用户程序读取输入流，识别更低层的结构，将识别出的token送给parser。

Given a skip-parser type SkipT, skip_parser_iteration_policy creates a scanner iteration policy that skips over portions that are recognized by the skip-parser. This may then be used to create a scanner. The scanner_policies class wraps all scanner related policies including the iteration policies.

给与一个类型为 SkipT 的跳读分析器，则 skip_parser_iteration_policy 将创建一个会跳过被跳读分析器所匹配的内容的扫描器迭代策略。scanner_policies 类封装了包括迭代策略在内的所有与扫描器相关的策略。

Semicolon problem comes out from Ecmascript standard inner tube actually, the context that inserted semicolon principle automatically in Es standard to break grammar has nothing to do quality, so implementation rises very troublesome have 3 kinds of means of settlements: 1, completely handwritten Parser2, modification grammar (in regarding terminative Fu Fang as to enter generation type line feed accord with), this kind of method is the most troublesome 3, modification ParserGenerator produces a mistake to restore code, whether is be being judged when encountering solecism caused in the absense of semicolon, whether to if be,satisfy in judgement insert semicolon principle (if encounter right big bracket or line feed) it is the most convenient that implementation of the 3rd kind of method rises, but the Parser support mistake that needs ParserGenerator generation restores.

分号问题其实是从Ecmascript标准里带出来的，es标准中的自动插入分号原则打破了语法的上下文无关性，所以实现起来很麻烦有三种解决方法：1，完全手写Parser2，修改语法（把换行符作为终结符放入产生式中），这种办法最麻烦3，修改ParserGenerator产生错误恢复代码，在遇到语法错误时判断是否是由于缺少分号引起的，如果是在判断是否满足插入分号原则（如遇到右大括号或者换行）第三种办法实现起来是最方便的，但是需要ParserGenerator产生的Parser支持错误恢复。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失