1//===----------------------------------------------------------------------===//
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is dual licensed under the MIT and the University of Illinois Open
6// Source Licenses. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9// Adaptation to Boost of the libcxx
10// Copyright 2010 Vicente J. Botet Escriba
11// Distributed under the Boost Software License, Version 1.0.
12// See http://www.boost.org/LICENSE_1_0.txt
13
14// test ratio_subtract
15
16#include <boost/ratio/ratio.hpp>
17
18#define STATIC_ASSERT(...) static_assert(__VA_ARGS__, #__VA_ARGS__)
19
20void test()
21{
22
23 {
24 typedef boost::ratio<0> R1;
25 typedef boost::ratio<0> R2;
26 typedef boost::ratio_subtract<R1, R2> R;
27 STATIC_ASSERT(R::num == 0 && R::den == 1);
28 }
29 {
30 typedef boost::ratio<1, 1> R1;
31 typedef boost::ratio<1, 1> R2;
32 typedef boost::ratio_subtract<R1, R2> R;
33 STATIC_ASSERT(R::num == 0 && R::den == 1);
34 }
35 {
36 typedef boost::ratio<1, 2> R1;
37 typedef boost::ratio<1, 1> R2;
38 typedef boost::ratio_subtract<R1, R2> R;
39 STATIC_ASSERT(R::num == -1 && R::den == 2);
40 }
41 {
42 typedef boost::ratio<-1, 2> R1;
43 typedef boost::ratio<1, 1> R2;
44 typedef boost::ratio_subtract<R1, R2> R;
45 STATIC_ASSERT(R::num == -3 && R::den == 2);
46 }
47 {
48 typedef boost::ratio<1, -2> R1;
49 typedef boost::ratio<1, 1> R2;
50 typedef boost::ratio_subtract<R1, R2> R;
51 STATIC_ASSERT(R::num == -3 && R::den == 2);
52 }
53 {
54 typedef boost::ratio<1, 2> R1;
55 typedef boost::ratio<-1, 1> R2;
56 typedef boost::ratio_subtract<R1, R2> R;
57 STATIC_ASSERT(R::num == 3 && R::den == 2);
58 }
59 {
60 typedef boost::ratio<1, 2> R1;
61 typedef boost::ratio<1, -1> R2;
62 typedef boost::ratio_subtract<R1, R2> R;
63 STATIC_ASSERT(R::num == 3 && R::den == 2);
64 }
65 {
66 typedef boost::ratio<56987354, 467584654> R1;
67 typedef boost::ratio<544668, 22145> R2;
68 typedef boost::ratio_subtract<R1, R2> R;
69 STATIC_ASSERT(R::num == -126708206685271LL && R::den == 5177331081415LL);
70 }
71}
72

source code of boost/libs/ratio/test/ratio_arithmetic/ratio_subtract_pass.cpp