1 // Boost.Convert test and usage example
2 // Copyright (c) 2009-2016 Vladimir Batov.
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
8 #if defined(BOOST_CONVERT_IS_NOT_SUPPORTED)
main(int,char const * [])9 int main(int, char const* []) { return 0; }
10 #else
11
12 #include <boost/convert.hpp>
13 #include <boost/convert/lexical_cast.hpp>
14 #include <boost/detail/lightweight_test.hpp>
15
16 using std::string;
17 using boost::convert;
18
19 struct boost::cnv::by_default : boost::cnv::lexical_cast {};
20
21 static
22 void
test_invalid()23 test_invalid()
24 {
25 char const* str[] = { "not", "1 2", " 33", "44 ", "0x11", "7 + 5" };
26 int const size = sizeof(str) / sizeof(str[0]);
27
28 for (int k = 0; k < size; ++k)
29 {
30 boost::optional<int> const res = convert<int>(str[k]);
31 bool const failed = !res;
32
33 if (!failed)
34 {
35 printf("test::cnv::invalid() failed for: <%s><%d>\n", str[k], res.value());
36 }
37 BOOST_TEST(failed);
38 }
39 }
40
41 static
42 void
test_dbl_to_str()43 test_dbl_to_str()
44 {
45 // printf("100.00 %s\n", convert<string>( 99.999).value().c_str());
46 // printf( "99.95 %s\n", convert<string>( 99.949).value().c_str());
47 // printf("-99.95 %s\n", convert<string>(-99.949).value().c_str());
48 // printf( "99.9 %s\n", convert<string>( 99.949).value().c_str());
49 // printf( "1.00 %s\n", convert<string>( 0.999).value().c_str());
50 // printf( "-1.00 %s\n", convert<string>( -0.999).value().c_str());
51 // printf( "0.95 %s\n", convert<string>( 0.949).value().c_str());
52 // printf( "-0.95 %s\n", convert<string>( -0.949).value().c_str());
53 // printf( "1.9 %s\n", convert<string>( 1.949).value().c_str());
54 // printf( "-1.9 %s\n", convert<string>( -1.949).value().c_str());
55 }
56
57 int
main(int,char const * [])58 main(int, char const* [])
59 {
60 string const not_int_str = "not an int";
61 string const std_str = "-11";
62 char const* const c_str = "-12";
63 int const v00 = convert<int>(not_int_str).value_or(-1);
64 int const v01 = convert<int>( std_str).value_or(-1);
65 int const v02 = convert<int>( c_str).value_or(-1);
66
67 BOOST_TEST(v00 == -1); // Failed conversion. No throw
68 BOOST_TEST(v01 == -11);
69 BOOST_TEST(v02 == -12);
70
71 test_invalid();
72 test_dbl_to_str();
73
74 return boost::report_errors();
75 }
76
77 #endif
78