1// Copyright 2024 Matt Borland
2// Distributed under the Boost Software License, Version 1.0.
3// https://www.boost.org/LICENSE_1_0.txt
4
5#include <boost/charconv.hpp>
6#include <boost/core/lightweight_test.hpp>
7
8template <typename T>
9void overflow_spot_value(const std::string& buffer, boost::charconv::chars_format fmt = boost::charconv::chars_format::general)
10{
11 auto v = static_cast<T>(42.L);
12 auto r = boost::charconv::from_chars(buffer.c_str(), buffer.c_str() + std::strlen(s: buffer.c_str()), v, fmt);
13
14 BOOST_TEST(v == static_cast<T>(42.L)) && BOOST_TEST(r.ec == std::errc::result_out_of_range);
15}
16
17template <typename T>
18void test()
19{
20 const auto format_list = {boost::charconv::chars_format::general, boost::charconv::chars_format::scientific, boost::charconv::chars_format::hex};
21
22 for (const auto format : format_list)
23 {
24 if (format != boost::charconv::chars_format::hex)
25 {
26 overflow_spot_value<T>("1e99999", format);
27 overflow_spot_value<T>("-1e99999", format);
28 overflow_spot_value<T>("1e-99999", format);
29 overflow_spot_value<T>("-1.0e-99999", format);
30 }
31 else
32 {
33 overflow_spot_value<T>("1p99999", format);
34 overflow_spot_value<T>("-1p99999", format);
35 overflow_spot_value<T>("1p-99999", format);
36 overflow_spot_value<T>("-1.0p-99999", format);
37 }
38 }
39}
40
41int main()
42{
43 test<float>();
44 test<double>();
45 test<long double>();
46
47 #ifdef BOOST_CHARCONV_HAS_FLOAT128
48 test<__float128>();
49 #endif
50
51 #ifdef BOOST_CHARCONV_HAS_FLOAT16
52 test<std::float16_t>();
53 #endif
54 #ifdef BOOST_CHARCONV_HAS_FLOAT32
55 test<std::float32_t>();
56 #endif
57 #ifdef BOOST_CHARCONV_HAS_FLOAT64
58 test<std::float64_t>();
59 #endif
60 #if defined(BOOST_CHARCONV_HAS_STDFLOAT128) && defined(BOOST_CHARCONV_HAS_FLOAT128)
61 test<std::float128_t>();
62 #endif
63 #ifdef BOOST_CHARCONV_HAS_BRAINFLOAT16
64 test<std::bfloat16_t>();
65 #endif
66
67 return boost::report_errors();
68}
69

source code of boost/libs/charconv/test/github_issue_110.cpp