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/* --c-mode-- */
%{
#include <stdio.h>
%}
%Start DEF CCOMMENT CPPCOMMENT STRING CHAR PREPROC
IDCHAR [_a-zA-Z0-9]
NIDCHAR [^_a-zA-Z0-9]
%%
BEGIN DEF;
<DEF>^#ifn?def |
<DEF>^#if |
<DEF>^#define |
<DEF>^#undef ;
<DEF>^#. { BEGIN CPPCOMMENT; }
<DEF>"/*" { BEGIN CCOMMENT; }
<CCOMMENT>"*/" { BEGIN DEF; }
<CCOMMENT>\n |
<CCOMMENT>. ;
<DEF>"//" { BEGIN CPPCOMMENT; }
<CPPCOMMENT>\n { BEGIN DEF; }
<CPPCOMMENT>. ;
<DEF>"\"" { BEGIN STRING; }
<STRING>"\"" { BEGIN DEF; }
<STRING>. |
<STRING>\n ;
<DEF>"'" { BEGIN CHAR; }
<CHAR>"'" { BEGIN DEF; }
<CHAR>\n |
<CHAR>. ;
<DEF>auto{NIDCHAR} |
<DEF>break{NIDCHAR} |
<DEF>case{NIDCHAR} |
<DEF>char{NIDCHAR} |
<DEF>const{NIDCHAR} |
<DEF>continue{NIDCHAR} |
<DEF>default{NIDCHAR} |
<DEF>do{NIDCHAR} |
<DEF>double{NIDCHAR} |
<DEF>else{NIDCHAR} |
<DEF>enum{NIDCHAR} |
<DEF>extern{NIDCHAR} |
<DEF>float{NIDCHAR} |
<DEF>for{NIDCHAR} |
<DEF>goto{NIDCHAR} |
<DEF>if{NIDCHAR} |
<DEF>int{NIDCHAR} |
<DEF>long{NIDCHAR} |
<DEF>register{NIDCHAR} |
<DEF>return{NIDCHAR} |
<DEF>short{NIDCHAR} |
<DEF>signed{NIDCHAR} |
<DEF>sizeof{NIDCHAR} |
<DEF>static{NIDCHAR} |
<DEF>struct{NIDCHAR} |
<DEF>switch{NIDCHAR} |
<DEF>typedef{NIDCHAR} |
<DEF>union{NIDCHAR} |
<DEF>unsigned{NIDCHAR} |
<DEF>void{NIDCHAR} |
<DEF>volatile{NIDCHAR} |
<DEF>while{NIDCHAR} { yyless(yyleng-1); }
<DEF>[a-zA-Z_][a-zA-Z_0-9]{3,} { printf("%s\n", yytext); }
<DEF>"\n" |
<DEF>. ;
%%
int main(int argc, char *argv[]) {
yylex();
}
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