# Flex

Flex (Fast Lexical Analyzer Generator) is a tool for generating programs that recognize patterns in text. It allows for the versatility to specify the rules for pattern-finding, eradicating the need to develop a specialized program.

## Description

Flex is a free software alternative to the classic lex tool. It generates C source code for scanners that can recognize regular expressions. The generated scanners are highly efficient and suitable for use in a wide variety of applications, from simple text processing to complex lexical analysis in compilers.

## Features

- Fast lexical analyzer generation
- Compatible with original lex specifications
- Generates efficient C code
- Supports extended regular expressions
- Cross-platform compatibility
- Active development and maintenance

## Installed Programs

- **flex**: The main lexical analyzer generator
- **flex++**: A symbolic link to flex for C++ code generation
- **lex**: A symbolic link to flex for lex compatibility mode

## Installed Libraries

- **libfl.so**: The flex library containing support functions

## Documentation

Comprehensive documentation is installed in `/usr/share/doc/flex-2.6.4/` including:

- Manual pages
- Examples
- Technical documentation
- FAQ

## Compatibility

Flex maintains compatibility with the original lex tool while providing many enhancements and improvements. Programs that expect lex can use the provided lex symbolic link.