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7c673cae | 1 | // Boost.Convert test and usage example |
20effc67 | 2 | // Copyright (c) 2009-2020 Vladimir Batov. |
7c673cae FG |
3 | // Use, modification and distribution are subject to the Boost Software License, |
4 | // Version 1.0. See http://www.boost.org/LICENSE_1_0.txt. | |
5 | ||
6 | #include "./test.hpp" | |
7 | ||
b32b8144 | 8 | #if defined(BOOST_CONVERT_IS_NOT_SUPPORTED) |
7c673cae FG |
9 | int main(int, char const* []) { return 0; } |
10 | #else | |
11 | ||
12 | #include <boost/convert.hpp> | |
13 | #include <boost/convert/lexical_cast.hpp> | |
7c673cae FG |
14 | |
15 | using std::string; | |
16 | using boost::convert; | |
17 | ||
b32b8144 | 18 | struct boost::cnv::by_default : boost::cnv::lexical_cast {}; |
7c673cae FG |
19 | |
20 | static | |
21 | void | |
22 | test_invalid() | |
23 | { | |
24 | char const* str[] = { "not", "1 2", " 33", "44 ", "0x11", "7 + 5" }; | |
25 | int const size = sizeof(str) / sizeof(str[0]); | |
26 | ||
27 | for (int k = 0; k < size; ++k) | |
28 | { | |
29 | boost::optional<int> const res = convert<int>(str[k]); | |
30 | bool const failed = !res; | |
31 | ||
32 | if (!failed) | |
33 | { | |
34 | printf("test::cnv::invalid() failed for: <%s><%d>\n", str[k], res.value()); | |
35 | } | |
36 | BOOST_TEST(failed); | |
37 | } | |
38 | } | |
39 | ||
40 | static | |
41 | void | |
42 | test_dbl_to_str() | |
43 | { | |
44 | // printf("100.00 %s\n", convert<string>( 99.999).value().c_str()); | |
45 | // printf( "99.95 %s\n", convert<string>( 99.949).value().c_str()); | |
46 | // printf("-99.95 %s\n", convert<string>(-99.949).value().c_str()); | |
47 | // printf( "99.9 %s\n", convert<string>( 99.949).value().c_str()); | |
48 | // printf( "1.00 %s\n", convert<string>( 0.999).value().c_str()); | |
49 | // printf( "-1.00 %s\n", convert<string>( -0.999).value().c_str()); | |
50 | // printf( "0.95 %s\n", convert<string>( 0.949).value().c_str()); | |
51 | // printf( "-0.95 %s\n", convert<string>( -0.949).value().c_str()); | |
52 | // printf( "1.9 %s\n", convert<string>( 1.949).value().c_str()); | |
53 | // printf( "-1.9 %s\n", convert<string>( -1.949).value().c_str()); | |
54 | } | |
55 | ||
56 | int | |
57 | main(int, char const* []) | |
58 | { | |
59 | string const not_int_str = "not an int"; | |
60 | string const std_str = "-11"; | |
61 | char const* const c_str = "-12"; | |
62 | int const v00 = convert<int>(not_int_str).value_or(-1); | |
63 | int const v01 = convert<int>( std_str).value_or(-1); | |
64 | int const v02 = convert<int>( c_str).value_or(-1); | |
65 | ||
66 | BOOST_TEST(v00 == -1); // Failed conversion. No throw | |
67 | BOOST_TEST(v01 == -11); | |
68 | BOOST_TEST(v02 == -12); | |
69 | ||
70 | test_invalid(); | |
71 | test_dbl_to_str(); | |
72 | ||
73 | return boost::report_errors(); | |
74 | } | |
75 | ||
76 | #endif |