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Note: This software, like all software in H:\Contrib, is user-contributed and is unsupported by CTC staff. The contributor may be willing to provide some assistance with this software.

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flex is a tool for generating scanners: programs which recognized lexical patterns in text. flex reads the given 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 as output a C source file, `lex.yy.c', which defines a routine `yylex()'. This file is compiled and linked with the `-lfl' library to produce an executable. When the executable is run, it analyzes its input for occurrences of the regular expressions. Whenever it finds one, it executes the corresponding C code.

 

At CTC, this tool is installed at H:\Contrib\flex.

 

Full documentation on the use of flex can be found at http://gnu.org/software/flex .

 

This tool was tested by Slava Zaloj.