Lexical analyzer generator (lex)

In this article, we discuss the lex, a tool used to generate a lexical analyzer used in the lexical analysis phase of a compiler.

Table of contents:Introduction.Structure of lex programs.Declarations.Translation rules.Auxilliary functions.yyvariables.yyin.yytext.yyleng.yyfunctions.yylex.yywrap.A token simulator.Conflict resolution in lex.Pattern matching using lex.Constructing a DFA from a regular expression.The lookahead operator.Conclusion.References.Introduction.

A lex i...