2 * This file is part of flex.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * Neither the name of the University nor the names of its contributors
15 * may be used to endorse or promote products derived from this software
16 * without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
25 /* A template scanner file to build "scanner.c".
27 test-lineno-trailing # report flex's yylineno
28 test-lineno-trailing 1 # report count_newlines(stdin)
37 %option 8bit outfile="scanner.c" prefix="test"
38 %option nounput nomain noyywrap yylineno
44 /* The goal here is to test the yylineno in the context of trailing-contexts.
45 Using rules that have newlines in look-ahead.
47 "Fixed_trailing:"/[\n]"test"[\n] {}
48 "Var_trailing:"{WORD}/[\n] {}
49 "Var_prefix_and_trailing:"{WORD}":"/(\n{WORD})* {}
52 <<EOF>> { printf("%d\n", yylineno);
58 /* returns number of '\n' characters in input, plus one.
59 This is what flex does, essentially. */
62 count_newlines (FILE* in)
65 while ((c=fgetc(in)) != EOF)
71 int main ( int, char**);
79 printf("%d\n", count_newlines(stdin));