Lex can be used to extract from source statistics on words' usage.
wstat.lex:
%option main
/* %option stdinit */
%option noyywrap
%{
#include<stdio.h>
%}
white [ \t\r\n\f]+
word [^ \n\t\r\f]+
%%
{white}* ;
"("{white}+[^)]*")" /* comment */ ;
{word} printf("%s\n",yytext);
Usage:
cat files | wstat | sort | uniq -c | sort | less
(ASau.)
