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7c673cae FG |
1 | // Use, modification and distribution are subject to the |
2 | // Boost Software License, Version 1.0. (See accompanying file | |
3 | // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
4 | ||
5 | #include <boost/config.hpp> | |
6 | ||
7 | int test_fallthrough(int n) | |
8 | { | |
9 | switch (n) | |
10 | { | |
11 | case 0: | |
12 | n++; | |
13 | BOOST_FALLTHROUGH; | |
14 | case 1: | |
15 | n++; | |
16 | break; | |
17 | } | |
18 | return n; | |
19 | } | |
20 | ||
21 | int test_unreachable(int i) | |
22 | { | |
23 | if(BOOST_LIKELY(i)) return i; | |
24 | ||
25 | throw i; | |
26 | BOOST_UNREACHABLE_RETURN(0); | |
27 | } | |
28 | ||
29 | BOOST_FORCEINLINE int always_inline(int i){ return ++i; } | |
30 | BOOST_NOINLINE int never_inline(int i){ return ++i; } | |
31 | ||
32 | BOOST_NORETURN void always_throw() | |
33 | { | |
34 | throw 0; | |
35 | } | |
36 | ||
37 | ||
38 | #define test_fallthrough(x) foobar(x) | |
39 | ||
40 | ||
41 | int main() | |
42 | { | |
43 | typedef int unused_type BOOST_ATTRIBUTE_UNUSED; | |
44 | try | |
45 | { | |
46 | int result = test_fallthrough BOOST_PREVENT_MACRO_SUBSTITUTION(0); | |
47 | BOOST_STATIC_CONSTANT(bool, value = 0); | |
48 | result += test_unreachable(1); | |
49 | result += always_inline(2); | |
50 | result += never_inline(3); | |
51 | if(BOOST_UNLIKELY(!result)) | |
52 | always_throw(); | |
53 | } | |
54 | catch(int) | |
55 | { | |
56 | return 1; | |
57 | } | |
58 | return 0; | |
59 | } | |
60 |