lcast_converter.cpp 2.3 KB

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