1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
///////////////////////////////////////////////////////////////
// Copyright Christopher Kormanyos 2002 - 2011.
// Copyright 2011 John Maddock. Distributed under the Boost
// Software License, Version 1.0. (See accompanying file
// LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
//
// This work is based on an earlier work:
// "Algorithm 910: A Portable C++ Multiple-Precision System for Special-Function Calculations",
// in ACM TOMS, {VOL 37, ISSUE 4, (February 2011)} (C) ACM, 2011. http://doi.acm.org/10.1145/1916461.1916469
#ifdef _MSC_VER
#define _SCL_SECURE_NO_WARNINGS
#endif
#include <boost/detail/lightweight_test.hpp>
#include "test.hpp"
#include <boost/multiprecision/gmp.hpp>
template <class T>
T make_rvalue_copy(const T a)
{
return a;
}
int main()
{
using namespace boost::multiprecision;
//
// Test change of default precision:
//
mpf_float::default_precision(100);
mpf_float a("0.1");
BOOST_CHECK_GE(a.precision(), 100);
mpf_float::default_precision(20);
{
// test assignment from lvalue:
mpf_float b(2);
BOOST_CHECK_GE(b.precision(), 20);
b = a;
BOOST_CHECK_EQUAL(b.precision(), a.precision());
}
{
// test assignment from rvalue:
mpf_float b(2);
BOOST_CHECK_GE(b.precision(), 20);
b = make_rvalue_copy(a);
BOOST_CHECK_EQUAL(b.precision(), a.precision());
}
mpf_float::default_precision(20);
{
// test construct from lvalue:
mpf_float b(a);
BOOST_CHECK_EQUAL(b.precision(), a.precision());
}
{
// test construct from rvalue:
mpf_float b(make_rvalue_copy(a));
BOOST_CHECK_EQUAL(b.precision(), a.precision());
}
{
mpf_float f150(2, 150);
BOOST_CHECK_GE(f150.precision(), 150);
}
{
mpf_float f150("1.2", 150);
BOOST_CHECK_GE(f150.precision(), 150);
}
//
// From https://github.com/boostorg/multiprecision/issues/65
//
{
mpf_float a(2);
a.precision(100);
BOOST_CHECK_EQUAL(a, 2);
BOOST_CHECK_GE(a.precision(), 100);
}
//
// string_view with explicit precision:
//
#ifndef BOOST_NO_CXX17_HDR_STRING_VIEW
{
std::string s("222");
std::string_view v(s.c_str(), 1);
mpf_float f(v, 100);
BOOST_CHECK_EQUAL(f, 2);
BOOST_CHECK_GE(f.precision(), 100);
}
#endif
// Swap:
{
mpf_float x(2, 100); // 100 digits precision.
mpf_float y(3, 50); // 50 digits precision.
swap(x, y);
BOOST_CHECK_EQUAL(x, 3);
BOOST_CHECK_EQUAL(y, 2);
BOOST_CHECK_GE(x.precision(), 50);
BOOST_CHECK_GE(y.precision(), 100);
x.swap(y);
BOOST_CHECK_EQUAL(x, 2);
BOOST_CHECK_EQUAL(y, 3);
BOOST_CHECK_GE(x.precision(), 100);
BOOST_CHECK_GE(y.precision(), 50);
x = std::move(mpf_float(y));
BOOST_CHECK_EQUAL(x, y);
BOOST_CHECK_EQUAL(x.precision(), y.precision());
}
{
mpf_float c(4), d(8), e(9), f;
f = (c + d) * d / e;
mpf_float g((c + d) * d / e);
}
{
mpf_float::default_precision(100);
mpf_float f1;
f1 = 3;
BOOST_CHECK_GE(f1.precision(), 100);
f1 = 3.5;
BOOST_CHECK_GE(f1.precision(), 100);
mpf_float f2(3.5);
BOOST_CHECK_GE(f2.precision(), 100);
mpf_float f3("5.1");
BOOST_CHECK_GE(f3.precision(), 100);
mpf_float::default_precision(50);
mpf_float f4(f3, 50);
BOOST_CHECK_GE(f4.precision(), 50);
f4.assign(f1, f4.precision());
BOOST_CHECK_GE(f4.precision(), 50);
}
return boost::report_errors();
}
|
