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Semi-Parallel Deep Pushdown Automata
Ševčík, Miroslav ; Zámečníková, Eva (referee) ; Meduna, Alexandr (advisor)
This work introduces semi-parallel deep pushdown automata as an extension of sequential deep pushdown automata. Unlike the sequential automaton, a semi-parallel one is able to make expansions of n nonterminal symbols on the pushdown top simultaneously. These automata, same as sequential deep pushdown automata, define the family of languages generated by n-limited state grammars. The advantage of semi-parallel deep pushdown automata lies in higher speed. This work also describes the implementation of an aplication that simulates operation of these automata.
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Parsing Based on State Grammars
Paulík, Miroslav ; Solár, Peter (referee) ; Meduna, Alexandr (advisor)
This work describes the characteristics of state grammars and n-limited state grammars with a focus on non-determinism in a parsing proccess based on such grammars. In particular, it focuses on the problems caused by enabling erasing productions or by possible occur of recursion. This work also describes possible solutions to non-deterministic problems, which are used in the design of a parallel parsing method. This method is significantly faster than sequence analysis based on backtracking.
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Deep Pushdown Automata of Finite Index
Poncová, Vendula ; Horáček, Petr (referee) ; Meduna, Alexandr (advisor)
This thesis introduces several modifications of deep pushdown automata considering the reduced number of states or non-input symbols. It is shown that the power of deep pushdown automata of finite index is not affected by a limitation of non-input symbols to one, thus these automata characterize an infinite hierarchy of language families resulting from programmed grammars of finite index. Based on a principle of these automata, it is established the normal form of deep pushdown automata. Finally, I introduce generalized deep pushdown automata. They expand the topmost possible non-input symbol in the pushdown. These automata and their reduced forms are equivalent to state grammars.
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Parsing Based on State Grammars
Svatý, Lukáš ; Vrábel, Lukáš (referee) ; Solár, Peter (advisor)
Syntax-directed translation based on state grammars is introduced in this bachelor's thesis. Theoretical section of this thesis is focused on the introduction of theoretical models that are necessary for understanding syntax analysis based on state grammars. The most important theoretical formal models in this thesis include deep pushdown transducer and translation grammar based on state grammar, which can be used in syntax analysis. Practical section of this thesis is focused on bottom-up syntax analysis using state grammar and its implementation.
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Parsing Based on Modified Pushdown Automata
Pluháček, David ; Lukáš, Roman (referee) ; Meduna, Alexandr (advisor)
The thesis introduces new models for formal languages, the m-limited state grammar and the deep pushdown automaton. Their basic definitions are presented, so is their mutual equivalence and the characteristics of the language family they describe. Following, a parsing method based on these models is presented. The method is an extension of a similar method used for context-free languages, the table driven parsing. The final part of the thesis describes the implementation of a parser based on the method.
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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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