format-strings-size_t.c revision 90a7820de7685cec75fcd47e98f0f9623c0f0477 
1// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -fsyntax-only -verify %s
2
3int printf(char const *, ...);
4
5void test(void) {
6  // size_t
7  printf("%zu", (double)42); // expected-warning {{format specifies type 'size_t' (aka 'unsigned long') but the argument has type 'double'}}
8
9  // intmax_t / uintmax_t
10  printf("%jd", (double)42); // expected-warning {{format specifies type 'intmax_t' (aka 'long') but the argument has type 'double'}}
11  printf("%ju", (double)42); // expected-warning {{format specifies type 'uintmax_t' (aka 'unsigned long') but the argument has type 'double'}}
12
13  // ptrdiff_t
14  printf("%td", (double)42); // expected-warning {{format specifies type 'ptrdiff_t' (aka 'long') but the argument has type 'double'}}
15}
16
17void test_writeback(void) {
18  printf("%jn", (long*)0); // no-warning
19  printf("%jn", (unsigned long*)0); // no-warning
20  printf("%jn", (int*)0); // expected-warning{{format specifies type 'intmax_t *' (aka 'long *') but the argument has type 'int *'}}
21
22  printf("%zn", (long*)0); // no-warning
23  // FIXME: Warn about %zn with non-ssize_t argument.
24
25  printf("%tn", (long*)0); // no-warning
26  printf("%tn", (unsigned long*)0); // no-warning
27  printf("%tn", (int*)0); // expected-warning{{format specifies type 'ptrdiff_t *' (aka 'long *') but the argument has type 'int *'}}
28}
29