4.7.5 Efficient Construction of LALR Parsing Tables There are several modifications we can make to Algorithm 4.59 to avoid constructing the full collection of sets of LR(1) items in the process of creating an LALR(1) parsing table. First, we can repr…

4.7.4 Constructing LALR Parsing Tables We now introduce our last parser construction method, the LALR (lookahead-LR) technique. This method is often used in practice, because the tables obtained by it are considerably smaller than the canonical LR ta…

4.7.3 Canonical LR(1) Parsing Tables We now give the rules for constructing the LR(1) ACTION and GOTO functions from the sets of LR(1) items. These functions are represented by a table, as before. The only difference is in the values of the entries.…

4.7.6 Compaction of LR Parsing Tables A typical programming language grammar with 50 to 100 terminals and 100 productions may have an LALR parsing table with several hundred states. The action function may easily have 20,000 entries, each requiring a…

4.4 Top-Down Parsing Top-down parsing can be viewed as the problem of constructing a parse tree for the input string, starting from the root and creating the nodes of the parse tree in preorder (depth-first, as discussed in Section 2.3.4). Equivalent…

基于虎书实现LALR(1)分析并生成GLSL编译器前端代码(C#) 为了完美解析GLSL源码,获取其中的信息(都有哪些in/out/uniform等),我决定做个GLSL编译器的前端(以后简称编译器或FrontEndParser). 以前我做过一个CGCompiler,可以自动生成LL(1)文法的编译器代码(C#语言的).于是我从<The OpenGL ® Shading Language>(以下简称"PDF")找到一个GLSL的文法,就开始试图将他改写为LL(1)文法.等…

转载自:http://magicpanda.net/2010/10/lua%E6%9E%B6%E6%9E%84%E6%96%87%E6%A1%A3/ Lua架构文档(翻译) 十 102010 前段时间翻译了lua官方关于lua5架构设计的一份文档,现在分享给大家. 注意:所有版权都归lua官方所有,本人仅将其翻译为中文,以方便中文阅读者.翻译中出现任何错误导致的结果,本人不负任何责任. 如果有任何翻译错误,以及意见与建议,请email本人.邮件地址:ice_ok@163.com. 转载请注明原作…

4.9 Parser Generators This section shows how a parser generator can be used to facilitate the construction of the front end of a compiler. We shall use the LALR parser generator Yacc as the basis of our discussion, since it implements many of the con…

http://www.lingcc.com/2012/05/16/12048/ a list of compiler books — 汗牛充栋的编译器参考资料 Posted on 2012年5月16日 by Lingcc | 14 Replies 前不久,有位<编译点滴>网友询问编译器方向的参考资料.其实之前讨论过一些编译器相关的在线资料–<有写编译器的冲动?这些资料很重要>.这篇博文就来总结总结编译技术相关的各类图书资料,供各位参考.这个书列是结合本人所了解的内容整理出来的,限于…

1 compress & mr hive默认的execution engine是mr hive> set hive.execution.engine;hive.execution.engine=mr 所以针对mr的优化就是hive的优化,比如压缩和临时目录 mapred-site.xml <property> <name>mapreduce.map.output.compress</name> <value>true</value>…

原文链接:https://www.cs.uic.edu/~spopuri/cparser.html Satya Kiran PopuriGraduate StudentUniversity of Illinois at ChicagoChicago, IL 60607spopur2 [at] uic [dot] eduWed Sep 13 12:24:25 CDT 2006 Table of Contents Introduction Prerequisites The LR Parser An…

http://dev.mysql.com/doc/refman/5.7/en/create-table.html You can use the TEMPORARY keyword when creating a table. A TEMPORARY table is visible only to the current session, and is dropped automatically when the session is closed. This means that two d…

原文地址:http://dev.mysql.com/doc/refman/5.7/en/memory-storage-engine.html The MEMORY storage engine (formerly known as HEAP) creates special-purpose tables with contents that are stored in memory. Because the data is vulnerable to crashes, hardware issu…

Chapter 12 Lexer and parser generators (ocamllex, ocamlyacc) This chapter describes two program generators: ocamllex, that produces a lexical analyzer from a set of regular expressions with associated semantic actions, and ocamlyacc, that produces a…

14.6 InnoDB Table Management 14.6.1 Creating InnoDB Tables 14.6.2 Moving or Copying InnoDB Tables to Another Machine 14.6.3 Grouping DML Operations with Transactions 14.6.4 Converting Tables from MyISAM to InnoDB 14.6.5 AUTO_INCREMENT Handling in Inn…

转载.节选于https://dev.mysql.com/doc/refman/8.0/en/innodb-tables.html 1.InnoDB Architecture The following diagram shows in-memory and on-disk structures that comprise the InnoDB storage engine architecture. This section covers topics related to InnoDB tab…

Hive动态分区和分桶 1.Hive动态分区 1.hive的动态分区介绍 ​ hive的静态分区需要用户在插入数据的时候必须手动指定hive的分区字段值,但是这样的话会导致用户的操作复杂度提高,而且在使用的时候会导致数据只能插入到某一个指定分区,无法让数据散列分布,因此更好的方式是当数据在进行插入的时候,根据数据的某一个字段或某几个字段值动态的将数据插入到不同的目录中,此时,引入动态分区. 2.hive的动态分区配置 --hive设置hive动态分区开启 set hive.exec.dynami…

文章标题 One SQL to Rule Them All – an Efficient and Syntactically Idiomatic Approach to Management of Streams and Tables 用SQL统一所有:一种有效的.语法惯用的流和表管理方法 syntactically 句法上;语法上;句法;句法性地;句法特征 idiomatic [ˌɪdiəˈmætɪk] 惯用的;合乎语言习惯的;习语的 approach [əˈproʊtʃ] v.(在距离或时间…

sun的原文,原文地址是http://developers.sun.com/mobility/midp/articles/parsingxml/. by Jonathan KnudsenMarch 7, 2002Download: [source code]  [MIDlet suite JAD]  [MIDlet suite JAR] Note: This article contains essentially the same information as JavaOne session…

Browser Work: 1.输入网址.  2.浏览器查找域名的IP地址.  3. 浏览器给web服务器发送一个HTTP请求  4. 网站服务的永久重定向响应  5. 浏览器跟踪重定向地址 现在,浏览器知道了要访问的正确地址,所以它会发送另一个获取请求.  6. 服务器“处理”请求,服务器接收到获取请求,然后处理并返回一个响应.  7. 服务器发回一个HTML响应  8. 浏览器开始显示HTML  9. 浏览器发送请求,以获取嵌入在HTML中的对象.在浏览器显示HTML时,它会注意到需要获取其…

[转] 一:LR(0),SLR(1),规范LR(1),LALR(1)的关系     首先LL(1)分析法是自上而下的分析法.LR(0),LR(1),SLR(1),LALR(1)是自下而上的分析法.            自上而下:从开始符号出发,根据产生式规则推导给定的句子.用的是推导            自下而上:从给定的句子规约到文法的开始符号.用的是归约      1: SLR(1)与LR(0)的关系:            SLR(1)与LR(0):简单的LR语法分析技术(即SLR(1…

Error Parsing: C:\android-sdk_r24.2-windows\android-sdk-windows\system-images\android-22\android-wear\armeabi-v7a cvc-complex-type.2.4.d: Invalid content was found starting with element 'd:skin'. No child element is expected at this point. The soluti…

Lukas Neuman--[ICDAR2015]Efficient Scene Text Localization and Recognition with Local Character Refinement 算法介绍 Fig. 2. Overview of the method. Initial text hypotheses efficiently generatedby a MSER detector are further refined using a local text mod…

手机客户端向服务器提交Http请求时,Tomcat抛出错误: 十二月 31, 2014 2:32:45 下午 org.apache.coyote.http11.AbstractHttp11Processor process信息: Error parsing HTTP request header Note: further occurrences of HTTP header parsing errors will be logged at DEBUG level. 经过调试后发现是Tomcat…

准确来讲,应该是maven项目使用Bootstrap时,出现 "Failed to decode downloaded font"和"OTS parsing error: Failed to convert WOFF 2.0 font to SFNT" 导致图标出不来的问题. 解决方案: 设置filter,font文件不需要filter,见下面示例: <build> <finalName>bootstrap in maven</fina…

Construction of Primitives in Open Cascade eryar@163.com 一.创建基本图元 Making Primitives 将用到如下的类创建基本图元,包括长方体(Box).楔形体(Wedge).旋转体(Revol)等.这些类提供Shell和Solid函数来返回实体(solid)和壳(shell). 使用方法都是调用这些类的构造函数,输入相应的参数,直接构造出基本图元.构造函数的参数不同,创建的基本几何实体的形状也会不同. 注:所有旋转体的角度值都是弧…

Tree Construction Problem's Link ---------------------------------------------------------------------------- Mean: 给定n个数,按照构造Binary Search Tree的方式来构造BST树,按顺序输出每一个非root结点的父节点的值. analyse: 构造BST树最坏情况下时间复杂度为O(n),肯定会超时. 注意到只需要输出结点的父节点的值,不需要真的构造BST树. 插到第i…

<?php error_reporting(E_ALL); /* Data can be send to coroutines using `$coroutine->send($data)`. The sent data will then * be the result of the `yield` expression. Thus it can be received using a code like * `$data = yield;`. */ /* What we're buildi…

遇到问题:parsing XML document from class path resource [spring/resources] 解决方法:项目properties— source—remove掉报错的—添加一个对的source重启即可.…

Notes on Efficient Graph-Based Image Segmentation 算法的目标 按照一种确定的标准, 将图片分割成细粒度的语义区域, 即Super pixel. 算法步骤 预处理. 将图片转换为undirected graph: \(G(V, E)\): 每一个像素都是一个顶点. 只有相邻像素间才存在边 边的权重为它连接的两个顶点间的像素距离作者的代码使用了欧氏距离 Steps: 将\(E\)按权重递增排序: \(\pi = (e_1, e_2, \dots, e…