1 ///////////////////////////////////////////////////////////////
2 // Copyright Christopher Kormanyos 2002 - 2011.
3 // Copyright 2011 John Maddock. Distributed under the Boost
4 // Software License, Version 1.0. (See accompanying file
5 // LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
7 // This work is based on an earlier work:
8 // "Algorithm 910: A Portable C++ Multiple-Precision System for Special-Function Calculations",
9 // in ACM TOMS, {VOL 37, ISSUE 4, (February 2011)} (C) ACM, 2011. http://doi.acm.org/10.1145/1916461.1916469
12 #define _SCL_SECURE_NO_WARNINGS
15 #include <boost/detail/lightweight_test.hpp>
18 #include <boost/multiprecision/gmp.hpp>
21 T make_rvalue_copy(const T a)
28 using namespace boost::multiprecision;
30 // Test change of default precision:
32 mpf_float::default_precision(100);
34 BOOST_CHECK_GE(a.precision(), 100);
35 mpf_float::default_precision(20);
37 // test assignment from lvalue:
39 BOOST_CHECK_GE(b.precision(), 20);
41 BOOST_CHECK_EQUAL(b.precision(), a.precision());
43 #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
45 // test assignment from rvalue:
47 BOOST_CHECK_GE(b.precision(), 20);
48 b = make_rvalue_copy(a);
49 BOOST_CHECK_EQUAL(b.precision(), a.precision());
52 mpf_float::default_precision(20);
54 // test construct from lvalue:
56 BOOST_CHECK_EQUAL(b.precision(), a.precision());
58 #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
60 // test construct from rvalue:
61 mpf_float b(make_rvalue_copy(a));
62 BOOST_CHECK_EQUAL(b.precision(), a.precision());
66 mpf_float f150(2, 150);
67 BOOST_CHECK_GE(f150.precision(), 150);
70 mpf_float f150("1.2", 150);
71 BOOST_CHECK_GE(f150.precision(), 150);
74 // From https://github.com/boostorg/multiprecision/issues/65
79 BOOST_CHECK_EQUAL(a, 2);
80 BOOST_CHECK_GE(a.precision(), 100);
84 // string_view with explicit precision:
86 #ifndef BOOST_NO_CXX17_HDR_STRING_VIEW
89 std::string_view v(s.c_str(), 1);
91 BOOST_CHECK_EQUAL(f, 2);
92 BOOST_CHECK_GE(f.precision(), 100);
97 mpf_float x(2, 100); // 100 digits precision.
98 mpf_float y(3, 50); // 50 digits precision.
100 BOOST_CHECK_EQUAL(x, 3);
101 BOOST_CHECK_EQUAL(y, 2);
102 BOOST_CHECK_GE(x.precision(), 50);
103 BOOST_CHECK_GE(y.precision(), 100);
105 BOOST_CHECK_EQUAL(x, 2);
106 BOOST_CHECK_EQUAL(y, 3);
107 BOOST_CHECK_GE(x.precision(), 100);
108 BOOST_CHECK_GE(y.precision(), 50);
109 #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
110 x = std::move(mpf_float(y));
111 BOOST_CHECK_EQUAL(x, y);
112 BOOST_CHECK_EQUAL(x.precision(), y.precision());
116 mpf_float c(4), d(8), e(9), f;
118 mpf_float g((c + d) * d / e);
121 mpf_float::default_precision(100);
124 BOOST_CHECK_GE(f1.precision(), 100);
126 BOOST_CHECK_GE(f1.precision(), 100);
128 BOOST_CHECK_GE(f2.precision(), 100);
130 BOOST_CHECK_GE(f3.precision(), 100);
132 mpf_float::default_precision(50);
133 mpf_float f4(f3, 50);
134 BOOST_CHECK_GE(f4.precision(), 50);
135 f4.assign(f1, f4.precision());
136 BOOST_CHECK_GE(f4.precision(), 50);
139 return boost::report_errors();