libcxx/test/std/input.output/iostream.format/ext.manip/put_time.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 // REQUIRES: locale.en_US.UTF-8
  10
  11 // <iomanip>
  12
  13 // template <class charT> T10 put_time(const struct tm* tmb, const charT* fmt);
  14
  15 #include <iomanip>
  16 #include <ostream>
  17 #include <cassert>
  18
  19 #include "test_macros.h"
  20 #include "platform_support.h" // locale name macros
  21
  22 template <class CharT>
  23 class testbuf
  24     : public std::basic_streambuf<CharT>
  25 {
  26     typedef std::basic_streambuf<CharT> base;
  27     std::basic_string<CharT> str_;
  28 public:
  29     testbuf()
  30     {
  31     }
  32
  33     std::basic_string<CharT> str() const
  34         {return std::basic_string<CharT>(base::pbase(), base::pptr());}
  35
  36 protected:
  37
  38     virtual typename base::int_type
  39         overflow(typename base::int_type ch = base::traits_type::eof())
  40         {
  41             if (ch != base::traits_type::eof())
  42             {
  43                 int n = static_cast<int>(str_.size());
  44                 str_.push_back(static_cast<CharT>(ch));
  45                 str_.resize(str_.capacity());
  46                 base::setp(const_cast<CharT*>(str_.data()),
  47                            const_cast<CharT*>(str_.data() + str_.size()));
  48                 base::pbump(n+1);
  49             }
  50             return ch;
  51         }
  52 };
  53
  54 int main(int, char**)
  55 {
  56     {
  57         testbuf<char> sb;
  58         std::ostream os(&sb);
  59         os.imbue(std::locale(LOCALE_en_US_UTF_8));
  60         std::tm t = {};
  61         t.tm_sec = 59;
  62         t.tm_min = 55;
  63         t.tm_hour = 23;
  64         t.tm_mday = 31;
  65         t.tm_mon = 11;
  66         t.tm_year = 161;
  67         t.tm_wday = 6;
  68         t.tm_isdst = 0;
  69         os << std::put_time(&t, "%a %b %d %H:%M:%S %Y");
  70         assert(sb.str() == "Sat Dec 31 23:55:59 2061");
  71     }
  72 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
  73     {
  74         testbuf<wchar_t> sb;
  75         std::wostream os(&sb);
  76         os.imbue(std::locale(LOCALE_en_US_UTF_8));
  77         std::tm t = {};
  78         t.tm_sec = 59;
  79         t.tm_min = 55;
  80         t.tm_hour = 23;
  81         t.tm_mday = 31;
  82         t.tm_mon = 11;
  83         t.tm_year = 161;
  84         t.tm_wday = 6;
  85         os << std::put_time(&t, L"%a %b %d %H:%M:%S %Y");
  86         assert(sb.str() == L"Sat Dec 31 23:55:59 2061");
  87     }
  88 #endif
  89
  90   return 0;
  91 }