aiubian-edge/Fast-Lexical-Analyzer-Generator-Program aiubian-edge/Fast-Lexical-Analyzer-Generator-Program

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aiubian-edge/Fast-Lexical-Analyzer-Generator-Program
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FLEX (fast lexical analyzer generator) is a tool/computer program for generating lexical analyzers (scanners or lexers) written by Vern Paxson in C around 1987. It is used together with Berkeley Yacc parser generator or GNU Bison parser generator. Flex and Bison both are more flexible than Lex and Yacc and produces faster code. Bison produces parser from the input file provided by the user. The function yylex() is automatically generated by the flex when it is provided with a .l file and this yylex() function is expected by parser to call to retrieve tokens from current/this token stream.

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