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Syntax-Direxted Translation Based on Deep Pushdown Automata
Solár, Peter ; Lukáš, Roman (referee) ; Meduna, Alexandr (advisor)
This thesis introduces syntax-directed translation based on deep pushdown automata. Necessary theoretical models are introduced in the theoretical part. The most important model, introduced in this thesis, is a deep pushdown transducer. The transducer should be used in syntax analysis, significant part of translation. Practical part consists of an implementation of simple-language interpret based on these models.
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Conversions between CF Grammars and Pushdown Automata
Makovský, Benjamin ; Goldefus, Filip (referee) ; Masopust, Tomáš (advisor)
This work suggests and solves the implementation of the transformation of context-free grammars and the conversions between context-free grammars and pushdown automata. It makes acquainted with the models used in modern theory of formal languages. In the work are indicated all algorithms necessary for transformations and mutual conversions between context-free grammars and pushdown automata. Proposed is an object representing the grammar and the automaton in the programme. Described is the assigning of definitions of grammar and of the automaton, the solution of drawing the automaton on the screen and the creation of graphical user interface of the application. The resulting programme is developed as Jawa applet which is available on public internet pages www.convertcfg.php5.cz.
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Parallel Syntax Analysis
Otáhal, Jiří ; Koutný, Jiří (referee) ; Čermák, Martin (advisor)
This thesis focuses on modern methods of language description. It introduces several controlled grammars, describing in detail the tree controlled grammar. The thesis is based on relatively new technique of syntax analysis using tree controlled grammars. The process of this analysis is described in detail, followed by a design of parallel-processing of this analysis. We managed to succesfully implement this design, speed up the syntax analysis and therefore achieve the main goal of the thesis.
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Graphdrawer and Mathemathic Equation Evaluator of Expressions
Skalický, Ivo ; Rychnovský, Lukáš (referee) ; Lukáš, Roman (advisor)
This work deals with utilization of precedence syntax analysis for conversion of mathematical expression into dynamic object model in order of evaluate and go on processing expressions. Objective was to create a program, which connects function of scientific calculator and graph drawer. Program can evaluate mathematical expressions in scope of real numbers, calculate fractional expressions, numerically integrate and analytically derive in accordance with a given parameter. Besides it provides function for depiction of any given curve explicitly, implicitly or parametricly into 2D graph. Graphic output can be exported in selectable resolution into several basic raster and vector formats. On account of portability Java was chosen as a language of implementation.
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Lexical Analyzer for Multiprocesor Computers
Otáhal, Jiří ; Goldefus, Filip (referee) ; Čermák, Martin (advisor)
Aim of this thesis is to invent method, which should accelerate speed of the analysis of source texts with multiprocessor computers. For this purpose application runs multiple process in Unix system. Each undergoing process analyzes exact partition in source file and then closes itself. Outcome of this process are internal structures, which presents exact partition. Inter-code is sequentially built from the structures which are subsequently interpreted. This kind of parallel analysis achieves acceleration of speed on the contrary of typical sequential analysis.
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Parsing Based on Multigeneration
Kyjovská, Linda ; Přikryl, Zdeněk (referee) ; Lukáš, Roman (advisor)
This work deals with syntax analysis problems based on multi-generation. The basic idea is to create computer program, which transforms one input string to n -1 output strings. An Input of this program is some plain text file created by user, which contains n grammar rules. Just one grammar from the input file is marked as an input grammar and others n -1 grammars are output grammars. This program creates list of used input grammar rules for an input string and uses corresponding output grammar rules for the creation of n -1 output strings. The program is written in C++ and Bison
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Advanced Error Recovery during Top-Down Parsing
Obluková, Alena ; Kolář, Dušan (referee) ; Meduna, Alexandr (advisor)
Parser is one of the most important parts in compiler since Syntax-Directed Translation is often used. This approach means that parser controls semantic actions and generation of syntax tree. When the input contains an error, parser cannot continue and the whole compiler has to stop. Therefore, it is important to have parser with error recovery, so when error occurs parser is able to continue. There are several error-recovery strategies and methods. In this paper is described Acceptable-sets derived from continuations specifically continuation in LL parsers. However it is not so well known method it is easy to explain and to implement. It can be used in the lesson to demonstrate error recovery in top-down parser.
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A New Approach to LL and LR Parsing
Martiček, Štefan ; Burgetová, Ivana (referee) ; Meduna, Alexandr (advisor)
Cílem této práce je vytvořit nový efektivní způsob syntaktické analýzy propojením LL a LR přístupů. Pro demonstrační účely je zhotoven nový programovací jazyk podle vzoru programovacího jazyka PHP. Tento jazyk je rozdělen na části, kde pro každou část je použita ta nejvhodnejší ze zmíněných metod. Jednotlivé metody jsou zde podrobněji popsané v kontextu dvou typů přístupů. Jedním z nich je syntaktická analýza shora dolů a tím druhým opačná verze, syntaktická analýza zdola nahoru. Pro každou separovanou část je vytvořen samostatný syntaktický analyzátor. Táto práce poskytuje kompletní teoretický základ k sestrojení všech zde použitých syntaktických analyzátorů a rozkladových tabulek. Nakonec jsou sestrojené analyzátory společne propojeny, což je úspěšné zakončení praktické demonstrace naší metody. V závěru jsou diskutovány dosažené výsledky práce jako efektivnejší druh syntaktické analýzy, modularita přístupu a podobně. Je zde také diskutovaná použitelnost navržené metody za účelem zefektivnení vývoje a rychlosti překladu. Jako poslední jsou uvedeny náměty pro další výzkum v této oblasti.
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Deep Syntax-Directed Translation
Senko, Jozef ; Kučera, Jiří (referee) ; Meduna, Alexandr (advisor)
This thesis is a continuation of my bachelor thesis, which is dedicated to syntax analysis based on deep pushdown automata. In theorical part of this thesis is defined everything fundamental for this work, for example deep syntax-directed translation, pushdown automata, deep pushdown automata, finite transducer and deep pushdown transducer. The second part of this thesis is dedicated to the educational program for students of IFJ. In this part is defined strucure of this program and its parts. All part of program are analyzed from a theoretical and practical point of view.
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Using structural method for objects recognition
Valsa, Vít ; Heriban, Pavel (referee) ; Šťastný, Jiří (advisor)
This diploma thesis deals with posibilities of using structural methods for recognition objects in a picture. The first part of this thesis describes methods for preparing the picture before processing. The core of the whole thesis is in chapter 3, where is analyzed in details the problem of the formation of deformation grammars for parsing and their using. In the next part is space for syntactic parser describing the deformation grammar. The conclusion is focused on testing the suggested methods and their results.
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