flex++

fast lexical analyzer generator

Install

All systems
curl cmd.cat/flex++.sh
Debian Debian
apt-get install flex
Ubuntu
apt-get install flex
Alpine
apk add flex
Arch Arch Linux
pacman -S flex
image/svg+xml Kali Linux
apt-get install flex
CentOS
yum install flex
Fedora
dnf install flex
Windows (WSL2)
sudo apt-get update sudo apt-get install flex
OS X
brew install flex
Raspbian
apt-get install flex
Dockerfile
dockerfile.run/flex++
Docker
docker run cmd.cat/flex++ flex++ powered by Commando

flex

fast lexical analyzer generator

Flex is a tool for generating scanners: programs which recognized lexical patterns in text. It reads the given input files 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.

flex-old

Old version of the fast lexical analyzer generator

flex is a tool for generating scanners: programs which recognize lexical patterns in text. This is the old 2.5.4a version, which is no longer being developed. You should normally choose flex, unless you have legacy lexer files that do not work with a modern flex. This product includes software developed by the University of California, Berkeley and its contributors. The upstream source code can be found at http://flex.sourceforge.net/