Tutorial Lex/Yacc - capsl

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General <strong>Lex</strong>/Flex Information • lex – is a tool to generator lexical analyzers. – It was written by Mike Lesk and Eric Schmidt (the Google guy). – It isn’t used anymore. • flex (fast lexical analyzer generator) – Free and open source alternative. – You’ll be using this. 2/17/2012 CAPSL 10
General <strong>Yacc</strong>/Bison Information • yacc – Is a tool to generate parsers (syntactic analyzers). – Generated parsers require a lexical analyzer. – It isn’t used anymore. • bison – Free and open source alternative. – You’ll be using this. 2/17/2012 CAPSL 11
Page 1 and 2: Flex/Bison Tutorial Aaron Myles Lan
Page 3 and 4: Lexer / Scanner Compiler Overview F
Page 5 and 6: • Syntactic Analysis Parser - The
Page 7 and 8: Optimizer(s) • Compiler Optimizat
Page 9: LEX/FLEX AND YACC/BISON OVERVIEW 2/
Page 13 and 14: FLEX IN DETAIL 2/17/2012 CAPSL 13
Page 15 and 16: Flex .l specification file /*** Def
Page 17 and 18: Flex Regex Matching Rules • Flex
Page 19 and 20: [0-9]+ { } [A-Za-z]+ { } Flex Examp
Page 25 and 26: Match any single character [0-9]+ {
Page 27 and 28: BISON IN DETAIL 2/17/2012 CAPSL 27
Page 29 and 30: • A grammar What is a Grammar? -
Page 31 and 32: Simple Example Grammar E � E + E
Page 33 and 34: Simple Example Grammar E � E + E
Page 35 and 36: Lexeme Token Type 2 Number Simple E
Page 41 and 42: Bison .y specification file /*** De
Page 43 and 44: Bison: definition Section Example /
Page 45 and 46: Bison: definition Section Example /
Page 47 and 48: Bison: rules Section Example /*** R
Page 55 and 56: What you need to do • You are giv
Page 57: • Wikipedia Credit - Most of the

Tutorial Lex/Yacc - capsl

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