Parsing in Practice
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Parser Tables for Non-LR(1) Grammars with Conflict Resolution Joel E
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Elsevier - Publisher Connector Science of Computer Programming 75 (2010) 943–979 Contents lists available at ScienceDirect Science of Computer Programming journal homepage: www.elsevier.com/locate/scico The IELR(1) algorithm for generating minimal LR(1) parser tables for non-LR(1) grammars with conflict resolution Joel E. Denny ∗, Brian A. Malloy School of Computing, Clemson University, Clemson, SC 29634, USA article info a b s t r a c t Article history: There has been a recent effort in the literature to reconsider grammar-dependent software Received 17 July 2008 development from an engineering point of view. As part of that effort, we examine a Received in revised form 31 March 2009 deficiency in the state of the art of practical LR parser table generation. Specifically, LALR Accepted 12 August 2009 sometimes generates parser tables that do not accept the full language that the grammar Available online 10 September 2009 developer expects, but canonical LR is too inefficient to be practical particularly during grammar development. In response, many researchers have attempted to develop minimal Keywords: LR parser table generation algorithms. In this paper, we demonstrate that a well known Grammarware Canonical LR algorithm described by David Pager and implemented in Menhir, the most robust minimal LALR LR(1) implementation we have discovered, does not always achieve the full power of Minimal LR canonical LR(1) when the given grammar is non-LR(1) coupled with a specification for Yacc resolving conflicts. We also detail an original minimal LR(1) algorithm, IELR(1) (Inadequacy Bison Elimination LR(1)), which we have implemented as an extension of GNU Bison and which does not exhibit this deficiency. -
Ethereal Developer's Guide Draft 0.0.2 (15684) for Ethereal 0.10.11
Ethereal Developer's Guide Draft 0.0.2 (15684) for Ethereal 0.10.11 Ulf Lamping, Ethereal Developer's Guide: Draft 0.0.2 (15684) for Ethere- al 0.10.11 by Ulf Lamping Copyright © 2004-2005 Ulf Lamping Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License, Version 2 or any later version published by the Free Software Foundation. All logos and trademarks in this document are property of their respective owner. Table of Contents Preface .............................................................................................................................. vii 1. Foreword ............................................................................................................... vii 2. Who should read this document? ............................................................................... viii 3. Acknowledgements ................................................................................................... ix 4. About this document .................................................................................................. x 5. Where to get the latest copy of this document? ............................................................... xi 6. Providing feedback about this document ...................................................................... xii I. Ethereal Build Environment ................................................................................................14 1. Introduction .............................................................................................................15 -
A Compiler Front-End for the WOOL Parallelization Library
A compiler front-end for the WOOL Parallelization library GEORGIOS VARISTEAS KTH Information and Communication Technology Master of Science Thesis Stockholm, Sweden 2010 TRITA-ICT-EX-2010:291 Royal Institute of Technology A compiler front-end for the WOOL Parallelization library Georgios Varisteas yorgos(@)kth.se 15 October, 2010 A master thesis project conducted at Examiner: Mats Brorsson Supervisor: Karl-Filip Faxén Abstract WOOL is a C parallelization library developed at SICS by Karl-Filip Faxén. It provides the tools for develop- ing fine grained independent task based parallel applications. This library is distinguished from other similar projects by being really fast and light; it manages to spawn and synchronize tasks in under 20 cycles. However, all software development frameworks which expose radically new functionality to a programming language, gain a lot by having a compiler to encapsulate and implement them. WOOL does not differ from this category. This project is about the development of a source-to-source compiler for the WOOL parallelization library, supporting an extension of the C language with new syntax that implements the WOOL API, transform- ing it and eventually outputting GNU C code. Additionally, this compiler is augmented with a wrapper script that performs compilation to machine code by using GCC. This script is configurable and fully automatic. The main advantage gained from this project is to satisfy the need for less overhead in software development with WOOL. The simplified syntax results in faster and more economical code writing while being less error- prone. Moreover, this compiler enables the future addition of many more features not applicable with the current state of WOOL as a library. -
The Design & Implementation of an Abstract Semantic Graph For
Clemson University TigerPrints All Dissertations Dissertations 12-2011 The esiD gn & Implementation of an Abstract Semantic Graph for Statement-Level Dynamic Analysis of C++ Applications Edward Duffy Clemson University, [email protected] Follow this and additional works at: https://tigerprints.clemson.edu/all_dissertations Part of the Computer Sciences Commons Recommended Citation Duffy, Edward, "The eD sign & Implementation of an Abstract Semantic Graph for Statement-Level Dynamic Analysis of C++ Applications" (2011). All Dissertations. 832. https://tigerprints.clemson.edu/all_dissertations/832 This Dissertation is brought to you for free and open access by the Dissertations at TigerPrints. It has been accepted for inclusion in All Dissertations by an authorized administrator of TigerPrints. For more information, please contact [email protected]. THE DESIGN &IMPLEMENTATION OF AN ABSTRACT SEMANTIC GRAPH FOR STATEMENT-LEVEL DYNAMIC ANALYSIS OF C++ APPLICATIONS A Dissertation Presented to the Graduate School of Clemson University In Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy Computer Science by Edward B. Duffy December 2011 Accepted by: Dr. Brian A. Malloy, Committee Chair Dr. James B. von Oehsen Dr. Jason P. Hallstrom Dr. Pradip K. Srimani In this thesis, we describe our system, Hylian, for statement-level analysis, both static and dynamic, of a C++ application. We begin by extending the GNU gcc parser to generate parse trees in XML format for each of the compilation units in a C++ application. We then provide verification that the generated parse trees are structurally equivalent to the code in the original C++ application. We use the generated parse trees, together with an augmented version of the gcc test suite, to recover a grammar for the C++ dialect that we parse. -
LFS-8.4-Fr.Pdf
Linux From Scratch Version 8.4 Créé par Gerard Beekmans Rédacteur en chef : Bruce Dubbs Linux From Scratch: Version 8.4 par Créé par Gerard Beekmans et Rédacteur en chef : Bruce Dubbs Copyright © 1999-2019 Gerard Beekmans Copyright © 1999-2019, Gerard Beekmans Tous droits réservés. Ce livre est distribué sous la Creative Commons License. Les instructions d'ordinateur peuvent être extraites du livre sous la MIT License. Linux® est une marque déposée de Linus Torvalds. Linux From Scratch - Version 8.4 Table des matières Préface ................................................................................................................................................................... viii i. Avant-propos ................................................................................................................................................ viii ii. Public visé ..................................................................................................................................................... ix iii. Architectures cibles de LFS ........................................................................................................................ ix iv. LFS et les standards ...................................................................................................................................... x v. Raison de la présence des paquets dans le livre .......................................................................................... xi vi. Prérequis ................................................................................................................................................... -
Parsing Techniques
Dick Grune, Ceriel J.H. Jacobs Parsing Techniques 2nd edition — Monograph — September 27, 2007 Springer Berlin Heidelberg NewYork Hong Kong London Milan Paris Tokyo Contents Preface to the Second Edition : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : v Preface to the First Edition : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : xi 1 Introduction : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 1 1.1 Parsing as a Craft. 2 1.2 The Approach Used . 2 1.3 Outline of the Contents . 3 1.4 The Annotated Bibliography . 4 2 Grammars as a Generating Device : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 5 2.1 Languages as Infinite Sets . 5 2.1.1 Language . 5 2.1.2 Grammars . 7 2.1.3 Problems with Infinite Sets . 8 2.1.4 Describing a Language through a Finite Recipe . 12 2.2 Formal Grammars . 14 2.2.1 The Formalism of Formal Grammars . 14 2.2.2 Generating Sentences from a Formal Grammar . 15 2.2.3 The Expressive Power of Formal Grammars . 17 2.3 The Chomsky Hierarchy of Grammars and Languages . 19 2.3.1 Type 1 Grammars . 19 2.3.2 Type 2 Grammars . 23 2.3.3 Type 3 Grammars . 30 2.3.4 Type 4 Grammars . 33 2.3.5 Conclusion . 34 2.4 Actually Generating Sentences from a Grammar. 34 2.4.1 The Phrase-Structure Case . 34 2.4.2 The CS Case . 36 2.4.3 The CF Case . 36 2.5 To Shrink or Not To Shrink . 38 xvi Contents 2.6 Grammars that Produce the Empty Language . 41 2.7 The Limitations of CF and FS Grammars . 42 2.7.1 The uvwxy Theorem . 42 2.7.2 The uvw Theorem . -
Licensing Information User Manual Release 9.0 Revision 1.2
Oracle SD-WAN Edge Licensing Information User Manual Release 9.0 Revision 1.2 October 2020 Licensing Information User Manual Oracle SD-WAN Edge 8.2 Oracle SD-WAN Edge Licensing Information ser !an"al# Release 9.0 Copyright Information $o%yrig't ( 2020# Oracle and)or its a*liates. All rig'ts reser+ed. ,'is soft-are and related doc"mentation are %rovided "nder a license agreement containing restrictions on "se and disclosure and are %rotected by intellect"al %ro%ert& la-s. E.ce%t as e.%ressly %ermitted in &o"r license agreement or allo-ed by la-# &o" may not "se# co%&# re%rod"ce# translate# broadcast# modif&# license# transmit# distrib"te# e.'ibit# %erform# %"blish# or display any %art# in any form# or by any means. Re+erse engineering# disassembl&# or decom%ilation of t'is soft-are# "nless re/"ired by la- for intero%erabilit&# is %ro'ibited. ,'e information contained 'erein is sub0ect to change -it'o"t notice and is not -arranted to be error-free. If &o" find any errors, %lease re%ort t'em to "s in -riting. If t'is is soft-are or related documentation t'at is deli+ered to t'e .S. 2o+ernment or an&one licensing it on be'alf of t'e .S. 2o+ernment# t'en t'e follo-ing notice is a%%licable3 .S. 2O4ERN!EN, END SERS3 Oracle %rograms, incl"ding any o%erating s&stem# integrated soft-are# any %rograms installed on t'e 'ard-are# and)or documentation# deli+ered to .S. -
GLR* - an Efficient Noise-Skipping Parsing Algorithm for Context Free· Grammars
GLR* - An Efficient Noise-skipping Parsing Algorithm For Context Free· Grammars Alon Lavie and Masaru Tomita School of Computer Scienc�, Carnegie Mellon University 5000 Forbes- Avenue, Pittsburgh, PA 15213 email: lavie©cs. emu . edu Abstract This paper describes GLR*, a parser that can parse any input sentence by ignoring unrec ognizable parts of the sentence. In case the standard parsing procedure fails to parse an input sentence, the parser nondeterministically skips some word(s) in the sentence, and returns the parse with fewest skipped words. Therefore, the parser will return some parse(s) with any input sentence, unless no part of the sentence can be recognized at all. The problem can be defined in the following way: Given a context-free grammar G and a sentence S, find and parse S' - the largest subset of words of S, such that S' E L(G). The algorithm described in this paper is a modificationof the Generalized LR (Tomita) parsing algorithm [Tomita, 1986]. The parser accommodates the skipping of words by allowing shift operations to be performed from inactive state nodes of the Graph Structured Stack. A heuristic similar to beam search makes the algorithm computationally tractable. There have been several other approaches to the problem of robust parsing, most of which are special purpose algorithms [Carbonell and Hayes, 1984), [Ward, 1991] and others. Because our approach is a modification to a standard context-free parsing algorithm, all the techniques and grammars developed for the standard parser can be applied as they are. Also, in case the input sentence is by itself grammatical, our parser behaves exactly as the standard GLR parser. -
Implementation of C Library for Constructing Packrat Parser with Statically Allocated Memory
Journal of Information Processing Vol.26 335–344 (Mar. 2018) [DOI: 10.2197/ipsjjip.26.335] Regular Paper Implementation of C Library for Constructing Packrat Parser with Statically Allocated Memory Yuta Sugimoto1,a) Atusi Maeda1 Received: July 23, 2017, Accepted: September 28, 2017 Abstract: Packrat parsing is a recursive descent parsing method with backtracking and memoization. Parsers based on this method require no separate lexical analyzers, and backtracking enables those parsers to handle a wide range of complex syntactic constructs. Memoization is used to prevent exponential growth of running time, resulting in linear time complexity at th cost of linear space consumption. In this study, we propose CPEG – a library that can be used to write parsers using Packrat parsing in C language. This library enables programmers to describe syntactic rules in an internal domain-specific language (DSL) which, unlike parser combinators, does not require runtime data structures to represent syntax. Syntax rules are just expressed by plain C macros. The runtime routine does not dynamically allocate memory regions for memoization. Instead, statically allocated arrays are used as memoization cache tables. Therefore, programmers can implement practical parsers with CPEG, which does not depend on any specific memory management features, requiring fixed-sized memory (except for input string). To enhance usability, a translator to CPEG from an external DSL is provided, as well as a tuning mechanism to control memoization parameters. Pars- ing time compared to other systems when parsing JavaScript Object Notation and Java source files are given. The experimental results indicate that the performance of CPEG is competitive with other libraries. -
Qgis-1.0.0-User-Guide-En.Pdf
Quantum GIS User, Installation and Coding Guide Version 1.0.0 ’Kore’ Preamble This document is the original user, installation and coding guide of the described software Quantum GIS. The software and hardware described in this document are in most cases registered trademarks and are therefore subject to the legal requirements. Quantum GIS is subject to the GNU General Public License. Find more information on the Quantum GIS Homepage http://qgis.osgeo.org. The details, data, results etc. in this document have been written and verified to the best of knowledge and responsibility of the authors and editors. Nevertheless, mistakes concerning the content are possible. Therefore, all data are not liable to any duties or guarantees. The authors, editors and publishers do not take any responsibility or liability for failures and their consequences. Your are always welcome to indicate possible mistakes. This document has been typeset with LATEX. It is available as LATEX source code via subversion and online as PDF document via http://qgis.osgeo.org/documentation/manuals.html. Translated versions of this document can be downloaded via the documentation area of the QGIS project as well. For more information about contributing to this document and about translating it, please visit: http://wiki.qgis.org/qgiswiki/DocumentationWritersCorner Links in this Document This document contains internal and external links. Clicking on an internal link moves within the document, while clicking on an external link opens an internet address. In PDF form, internal links are shown in blue, while external links are shown in red and are handled by the system browser. -
A Simple, Possibly Correct LR Parser for C11 Jacques-Henri Jourdan, François Pottier
A Simple, Possibly Correct LR Parser for C11 Jacques-Henri Jourdan, François Pottier To cite this version: Jacques-Henri Jourdan, François Pottier. A Simple, Possibly Correct LR Parser for C11. ACM Transactions on Programming Languages and Systems (TOPLAS), ACM, 2017, 39 (4), pp.1 - 36. 10.1145/3064848. hal-01633123 HAL Id: hal-01633123 https://hal.archives-ouvertes.fr/hal-01633123 Submitted on 11 Nov 2017 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. 14 A simple, possibly correct LR parser for C11 Jacques-Henri Jourdan, Inria Paris, MPI-SWS François Pottier, Inria Paris The syntax of the C programming language is described in the C11 standard by an ambiguous context-free grammar, accompanied with English prose that describes the concept of “scope” and indicates how certain ambiguous code fragments should be interpreted. Based on these elements, the problem of implementing a compliant C11 parser is not entirely trivial. We review the main sources of difficulty and describe a relatively simple solution to the problem. Our solution employs the well-known technique of combining an LALR(1) parser with a “lexical feedback” mechanism. It draws on folklore knowledge and adds several original as- pects, including: a twist on lexical feedback that allows a smooth interaction with lookahead; a simplified and powerful treatment of scopes; and a few amendments in the grammar. -
Latexsample-Thesis
INTEGRAL ESTIMATION IN QUANTUM PHYSICS by Jane Doe A dissertation submitted to the faculty of The University of Utah in partial fulfillment of the requirements for the degree of Doctor of Philosophy Department of Mathematics The University of Utah May 2016 Copyright c Jane Doe 2016 All Rights Reserved The University of Utah Graduate School STATEMENT OF DISSERTATION APPROVAL The dissertation of Jane Doe has been approved by the following supervisory committee members: Cornelius L´anczos , Chair(s) 17 Feb 2016 Date Approved Hans Bethe , Member 17 Feb 2016 Date Approved Niels Bohr , Member 17 Feb 2016 Date Approved Max Born , Member 17 Feb 2016 Date Approved Paul A. M. Dirac , Member 17 Feb 2016 Date Approved by Petrus Marcus Aurelius Featherstone-Hough , Chair/Dean of the Department/College/School of Mathematics and by Alice B. Toklas , Dean of The Graduate School. ABSTRACT Blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah. Blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah. Blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah. Blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah. Blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah. Blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah. Blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah. Blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah.