Tutorial Lex/Yacc - capsl

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• Lexical Analysis Lexer/Scanner – process of converting a sequence of characters into a sequence of tokens. foo = 1 - 3**2 2/17/2012 Lexeme Token Type foo Variable = Assignment Operator 1 Number - Subtraction Operator 3 Number ** Power Operator 2 Number CAPSL 4
• Syntactic Analysis Parser – The process of analyzing a sequence of tokens to determine its grammatical structure. – Syntax errors are identified during this stage. Lexeme Token Type foo Variable = Assignment Operator 1 Number - Subtraction Operator 3 Number ** Power Operator 2 Number 2/17/2012 foo = - 1 ** 3 2 CAPSL 5
Page 1 and 2: Flex/Bison Tutorial Aaron Myles Lan
Page 3: Lexer / Scanner Compiler Overview F
Page 7 and 8: Optimizer(s) • Compiler Optimizat
Page 9 and 10: LEX/FLEX AND YACC/BISON OVERVIEW 2/
Page 11 and 12: General Yacc/Bison Information •
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
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Tutorial Lex/Yacc - capsl

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