yildizozan/flex-lexer

Simple Lexer Flex Example

flex-lexer

Simple Lexer Flex Example

Need to install Flex

sudo apt-get update
sudo apt-get install flex

Write rules a file

flex rules.lex

Flex compiler generate lex.yy.c file, Now, we can compile with gcc or cc

cc -o lexer lex.yy.c -ll

Now, we can check syntax with your rules!

./lexer source.g++

Done!