ceph/src/boost/libs/convert/test/lcast_converter.cpp

   1 // Boost.Convert test and usage example
   2 // Copyright (c) 2009-2020 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)
   9 int main(int, char const* []) { return 0; }
  10 #else
  11
  12 #include <boost/convert.hpp>
  13 #include <boost/convert/lexical_cast.hpp>
  14
  15 using std::string;
  16 using boost::convert;
  17
  18 struct boost::cnv::by_default : boost::cnv::lexical_cast {};
  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