blob: f1b0e7c726bb1df025d752e03ebbb57c184dff75 (
plain)
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
|
// (C) Copyright Matt Borland 2021.
// Use, modification and distribution are subject to the
// Boost Software License, Version 1.0. (See accompanying file
// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_MATH_CCMATH_ISINF
#define BOOST_MATH_CCMATH_ISINF
#include <boost/math/special_functions/fpclassify.hpp>
#include <boost/math/ccmath/detail/config.hpp>
#ifdef BOOST_MATH_NO_CCMATH
#error "The header <boost/math/isinf.hpp> can only be used in C++17 and later."
#endif
namespace boost::math::ccmath {
template <typename T>
constexpr bool isinf BOOST_MATH_PREVENT_MACRO_SUBSTITUTION(T x) noexcept
{
if(BOOST_MATH_IS_CONSTANT_EVALUATED(x))
{
if constexpr (std::numeric_limits<T>::is_signed)
{
#if defined(__clang_major__) && __clang_major__ >= 6
# pragma clang diagnostic push
# pragma clang diagnostic ignored "-Wtautological-constant-compare"
# if defined(__has_warning)
# if __has_warning("-Wnan-infinity-disabled")
# pragma clang diagnostic ignored "-Wnan-infinity-disabled"
# endif
# endif
#endif
return x == std::numeric_limits<T>::infinity() || -x == std::numeric_limits<T>::infinity();
#if defined(__clang_major__) && __clang_major__ >= 6
#pragma clang diagnostic pop
#endif
}
else
{
return x == std::numeric_limits<T>::infinity();
}
}
else
{
using boost::math::isinf;
if constexpr (!std::is_integral_v<T>)
{
return (isinf)(x);
}
else
{
return (isinf)(static_cast<double>(x));
}
}
}
}
#endif // BOOST_MATH_CCMATH_ISINF
|
