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
|
// Copyright 2025 Matt Borland
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
//
// See: https://github.com/boostorg/charconv/issues/282
#include <boost/charconv.hpp>
#include <boost/core/lightweight_test.hpp>
template <std::size_t size>
void test_no_format()
{
char buffer[size];
const auto r = boost::charconv::to_chars(buffer, buffer + size, 0.1);
if (BOOST_TEST(r))
{
*r.ptr = '\0';
BOOST_TEST_CSTR_EQ(buffer, "0.1");
}
}
template <std::size_t size>
void test_with_format()
{
char buffer[size];
const auto r = boost::charconv::to_chars(buffer, buffer + size, 0.1, boost::charconv::chars_format::general);
if (BOOST_TEST(r))
{
*r.ptr = '\0';
BOOST_TEST_CSTR_EQ(buffer, "0.1");
}
}
template <std::size_t size>
void test_smaller(const double value, const char* res)
{
char buffer[size];
const auto r = boost::charconv::to_chars(buffer, buffer + size, value, boost::charconv::chars_format::general);
if (BOOST_TEST(r))
{
*r.ptr = '\0';
BOOST_TEST_CSTR_EQ(buffer, res);
}
}
int main()
{
test_no_format<20>();
test_no_format<100>();
test_no_format<boost::charconv::limits<double>::max_chars10>();
test_with_format<20>();
test_with_format<100>();
test_with_format<boost::charconv::limits<double>::max_chars10>();
// The following match the behavior of GCC 15.2
// 0.01 vs 1e-02
test_smaller<20>(0.01, "0.01");
test_smaller<100>(0.01, "0.01");
test_smaller<boost::charconv::limits<double>::max_chars10>(0.01, "0.01");
// 0.001 vs 1e-03
test_smaller<20>(0.001, "0.001");
test_smaller<100>(0.001, "0.001");
test_smaller<boost::charconv::limits<double>::max_chars10>(0.001, "0.001");
// 0.0001 vs 1e-04
test_smaller<20>(0.0001, "0.0001");
test_smaller<100>(0.0001, "0.0001");
test_smaller<boost::charconv::limits<double>::max_chars10>(0.0001, "0.0001");
// 0.00001 vs 1e-05
test_smaller<20>(0.00001, "1e-05");
test_smaller<100>(0.00001, "1e-05");
test_smaller<boost::charconv::limits<double>::max_chars10>(0.00001, "1e-05");
return boost::report_errors();
}
|
