Flex

Flex (fast lexical analyzer generator) is a tool for generating scanners. A scanner, sometimes called a tokenizer, is a program which recognizes lexical patterns in...

Free
Open Source
Linux

flex (fast lexical analyzer generator) is a tool for generating scanners. a scanner, sometimes called a tokenizer, is a program which recognizes lexical patterns in text. the flex program reads userspecified input files, or its standard input if no file names are given, for a description of a scanner to generate. the description is in the form of pairs of regular expressions and c code, called rules. flex generates a c source file named, "lex.yy.c", which defines the function yylex(). the file "lex.yy.c" can be compiled and linked to produce an executable. when the executable is run, it analyzes its input for occurrences of text matching the regular expressions for each rule. whenever it finds a match, it executes the corresponding c code.

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The Best 3 Flex Alternatives

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ANTLR

ANTLR, ANother Tool for Language Recognition, is a language tool that provides a framework for constructing recognizers, interpreters, compilers, and translators from grammatical descriptions containing actions in a variety of target...

Free Open Source Mac OS X Windows Linux
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Ragel

Ragel is a finite-state machine compiler and a parser generator targeting C, C++ and ASM. It can recognize byte sequences and execute code at arbitrary points in the...

Free Open Source Windows

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Flex

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The Best 3 Flex Alternatives

ANTLR

Ragel

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