ceph/src/boost/libs/hana/test/string/c_str.cpp

   1 // Copyright Louis Dionne 2013-2017
   2 // Distributed under the Boost Software License, Version 1.0.
   3 // (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
   4
   5 #include <boost/hana/assert.hpp>
   6 #include <boost/hana/string.hpp>
   7
   8 #include <cstring>
   9 namespace hana = boost::hana;
  10
  11
  12 int main() {
  13     BOOST_HANA_RUNTIME_CHECK(std::strcmp(
  14         BOOST_HANA_STRING("").c_str(),
  15         ""
  16     ) == 0);
  17
  18     BOOST_HANA_RUNTIME_CHECK(std::strcmp(
  19         BOOST_HANA_STRING("a").c_str(),
  20         "a"
  21     ) == 0);
  22
  23     BOOST_HANA_RUNTIME_CHECK(std::strcmp(
  24         BOOST_HANA_STRING("ab").c_str(),
  25         "ab"
  26     ) == 0);
  27
  28     BOOST_HANA_RUNTIME_CHECK(std::strcmp(
  29         BOOST_HANA_STRING("abc").c_str(),
  30         "abc"
  31     ) == 0);
  32
  33     BOOST_HANA_RUNTIME_CHECK(std::strcmp(
  34         BOOST_HANA_STRING("abcd").c_str(),
  35         "abcd"
  36     ) == 0);
  37
  38     // make sure we can turn a non-constexpr hana::string
  39     // into a constexpr char const*
  40     {
  41         auto str = BOOST_HANA_STRING("abcdef");
  42         constexpr char const* c_str = str.c_str();
  43         (void)c_str;
  44     }
  45
  46     // make sure c_str is actually a static member function
  47     {
  48         constexpr char const* c_str = hana::string<'f', 'o', 'o'>::c_str();
  49         (void)c_str;
  50     }
  51 }