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picture1_Programming Pdf 183819 | 04 Grammars


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File: Programming Pdf 183819 | 04 Grammars
concepts of programming languages lecture 4 grammars patrick donnelly montanastate university spring 2014 patrick donnelly montana state university concepts of programming languages spring 2014 1 42 administrivia assignments programming 1 ...

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                       Concepts of Programming Languages
                                                Lecture 4 - Grammars
                                                     Patrick Donnelly
                                                   MontanaState University
                                                         Spring 2014
 Patrick Donnelly (Montana State University)     Concepts of Programming Languages                            Spring 2014      1/ 42
    Administrivia
     Assignments:
                                          Programming #1 : due 02.10
     Reading:
                                                           Chapter 3
 Patrick Donnelly (Montana State University)     Concepts of Programming Languages                            Spring 2014      2/ 42
        Alanguagethat is simple to parse for the compiler is also simple to
                                      parse for the human programmer.
                                                                                                      N. Wirth (1974)
 Patrick Donnelly (Montana State University)     Concepts of Programming Languages                            Spring 2014      3/ 42
    Terminology
     Definition
     Asentence is a string of characters over some alphabet.
     Definition
     Alanguage is a set of sentences.
     Definition
     Alexeme is the lowest level syntactic unit of a language (e.g.,                                                  ,
                                                                                                                    *
     sum, begin).
     Definition
     Atokenisacategoryoflexemes(e.g., identifier).
 Patrick Donnelly (Montana State University)     Concepts of Programming Languages                            Spring 2014      4/ 42
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...Concepts of programming languages lecture grammars patrick donnelly montanastate university spring montana state administrivia assignments due reading chapter alanguagethat is simple to parse for the compiler also human programmer n wirth terminology denition asentence a string characters over some alphabet alanguage set sentences alexeme lowest level syntactic unit language e g sum begin atokenisacategoryoflexemes identier...

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