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JLex Lecture 4 Mon, Jan 24, 2005 JLex JLex is a lexical analyzer generator in Java. It is based on the well-known lex, which is a lexical analyzer generator in C.
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Lexical Analysis Textbook:Modern Compiler Design ... JLex Spec File Jlex linecount Outline Basic Compiler Phases Example Tokens Example Non Tokens Example ...
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FLEX examples. Writing and transforming ... 2nd HW Flex for Decaf. 3rd HW ... Using JLex and JBison instead Flex and Bison. MIPS or x86 or ...
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Languages and Compilers (SProg og Overs ttere) Lecture 4 Bent Thomsen Department of Computer Science Aalborg University With acknowledgement to Norm Hutchinson whose ...
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Title: PowerPoint Presentation Last modified by: AD Created Date: 1/1/1601 12:00:00 AM Document presentation format: On-screen Show Other titles: Times New Roman ...
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Syntactic analysis. Prepare the grammar. Grammar transformations. Left-factoring ... if spelling matches a keyword change my kind. automatically ...
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Title: Compiler Design Author: Preferred Customer Last modified by: Robb Koether Created Date: 6/27/2003 7:45:09 PM Document presentation format: On-screen Show
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Title: CSCE 330 Programming Language Structures Author: Marco Valtorta Last modified by: Dr. Marco G. Valtorta Created Date: 8/19/2004 1:30:12 AM Document ...
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Input: printable Ascii characters. Output: tokens. Discard: whitespace, comments ... number (sequence of decimal numbers eventually starting with the (minus) sign ...
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Lexical Analysis
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... if still unsatisfied GOTO line 3; 5 cook; 6 inject ... beefToBeStewed into cubes; chop onion ... Ingredient Fruit Chicken Beef Pork ...
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Title: JDuck: Building a Software Engineering Tool as a CS2 Project Author: Mike Godfrey Last modified by: Michael W. Godfrey Created Date: 3/8/1999 8:30:00 PM
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Lexical analysis in perspective. LEXICAL ANALYZER. Scan Input. Remove ... (price gst rebate = 10.00) gift : ... rebate. identifier. Less than or equal to ...
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doB () doA () doCommon () if (condition2) doD () doC () doMore () Challenges ... doB () doA () doCommon () if (condition2) doD () doC () skip = 0. length = 2 ...
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Title: A Skill Is Born: The Emergence of Web Site Design Skills (1994-1998) Last modified by: hearst Created Date: 7/19/2001 7:37:29 AM Document presentation format
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Roles of lexical analysis. What is a token. Regular expressions and ... Identify language keywords and standard identifiers. Handle include files and macros ...
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Parse trees and abstract syntax. Ambiguous grammars ... In example grammar, left-most and right-most derivations produced identical parse trees ...
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5 cook; 6 inject food; Design Principles. Syntax: - Close to recipe convention |- Less ambiguous ... How to limit the scope and complexity of your project. Why ...
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Source code is typically a high level programming language (Java, C , etc) but ... High level description of a circuit - machine instructions to fabricate circuit ...
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Is the first step in the translation/compilation process. input language ==== output language ... throws java.io.IOException { for (;;) switch (next_char) ...
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Identifying Candidates (1/2) T q = new T() T.field = p or p = T.field ... against Jikes RVM on how many candidates found/replaced and how long it takes ...
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A simple traditional modern compiler/interpreter (1.2) Subjects Covered ... Lisp, Scheme, ML, Miranda, Hope, Haskel. Logic Programming. Prolog. Other Languages ...
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Incrementalized Pointer and Escape Analysis
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Jakarta Tool Suite (JTS) ... Jakarta Tool Suite (JTS) JTS to make programming languages extensible ... Bernie Lofaso (Jakarta Team Member) Parser. Java_Cup ...
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Languages and Compilers (SProg og Overs ttere) Bent Thomsen Department of Computer Science Aalborg University
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The class constructor Symbol pairs together a terminal token with an optional ... if a terminal is specified with a class (a subtype of Object) then an object of ...
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... underpinnings of its emerging Web-based development ... Programming Language designers can waste a lot of time discussing unimportant details of syntax ...
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Add precedence and associativity. left means, that a b c is parsed as (a b) c ... Without precedence JavaCUP will tell us: Shift/Reduce conflict found ...
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Kinds of Parsers. Top-Down (Predictive Parsing) LL. Construct parse tree in a top-down matter ... Identify potential bugs. Prove the absence of runtime errors ...
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Prof. Necula CS 164 Lecture 3. 3. Outline. Informal sketch ... noun, verb, adjective, ... In a programming language: Identifier, Integer, Keyword, Whitespace, ...
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Agent-based solutions, monitoring the health and performance of systems (servers, ... Became Apache's SOAP. Too early to tell on wide-spread adoption. Wrapping ...
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Lexical analysis converts a character stream to a token stream of pairs token type, value ... Prior lexical analysis phase obtains tokens consisting of a type ...
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A rule has a left-hand side (LHS) and a right-hand side (RHS), and consists of ... Input program read top-to-bottom, left-to-right, with no backtracking ...
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Use Academic Computer Center (Amadeus) Can work on your personal computers ... Evaluating repeated expressions only once. Replace expressions by simpler ...
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Lexical Analysis Compiler Baojian Hua bjhua@ustc.edu.cn Compiler Front and Back Ends Front End Lexical Analyzer The lexical analyzer translates the source program ...
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100% Java. In memory database. Query engine for alternative ... Telegraph & Java. 9. Tuples ... Java Introspection Helps. Applet-based Front End ...
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Title: Defining Program Syntax Subject: Textbook, Chapter 02 Last modified by: PEHLIVAN Created Date: 1/8/1999 8:00:12 AM Document presentation format
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this is some text without spaces and ... Wie arbeitet ein Lexer. Erkennt Token Klassen ... Basierend auf dem aktuellen Input-Symbol oder Token (vom Lexer) ...
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How to... Produce lexers and parsers? Produce transform program? Where does GenVoca fit in? ... specify syntax of DSL or language extension using annotated, ...
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School of Computer Science. University of Windsor. 11/16/09. 2 ... The only valid excuse for missing an exam is a documented medical emergency. 11/16/09 ...
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