Quelle  sample.lex   Sprache: Lex

%{
#define NUMBER 400
#define COMMENT 401
#define TEXT 402
#define COMMAND 403
#define ERROR 999
%}
%%
[ \t]          ;
[0-9]+         |
[0-9]+\.[0-9]* |
\.[0-9]+        {return NUMBER;}
#.*             {return COMMENT;}
\"[^\"\n]*\" {return TEXT;}
[a-zA-Z0-9]+    {return COMMAND;}
\n              {return '\n';}
.