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4.1 ? ?

Lexical Analysis the process by which the compiler groups certain strings of characters into individual tokens. Lexical Analyzer ? Scanner ? Lexer. 4.1 ? ?. Token ????? ?? ?? ?? ?? Token - a single syntactic entity(terminal symbol).

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466 views • 31 slides

Introduction to Yacc & Lex

Introduction to Yacc & Lex. Compilation Sequence. What is Lex?. The main job of a lexical analyzer (scanner) is to break up an input stream into more usable elements ( tokens ) a = b + c * d; ID ASSIGN ID PLUS ID MULT ID SEMI (<ID> = <ID> + <ID> * <ID> ; )

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340 views • 11 slides

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4.1 ? ?

Introduction to Yacc &amp; Lex

Introduction to Yacc & Lex