本文整理汇总了C++中std::u32string::empty方法的典型用法代码示例。如果您正苦于以下问题：C++ u32string::empty方法的具体用法？C++ u32string::empty怎么用？C++ u32string::empty使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类std::u32string的用法示例。
在下文中一共展示了u32string::empty方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: compare
int string::compare(size_type pos1, size_type n1, const std::u32string& str) const
{
if ( n1 == 0 && !str.empty() )
return -1;
size_type sz = (n1 == npos ? size() - pos1 : n1);
size_type len = str.size();
size_type n = std::min(sz, len);
auto pos = cbegin()+pos1;
auto spos = str.cbegin();
for ( ; n; pos++, spos++ )
{
if ( traits_type::lt(*pos, *spos) )
return -1;
if ( traits_type::lt(*spos, *pos) )
return 1;
}
if ( sz < len )
return -1;
if ( sz > len )
return 1;
return 0;
}示例2: dynamicHint
Text::Text(Mat4f const & transformation, std::string const & fontname, std::u32string const & text) :
dynamicHint(text.empty()), modelMat(transformation),
fontname(fontname), string(text),
vao(nullptr), vbo(nullptr), ibo(nullptr)
{
init();
}示例3: wmain
int wmain(int argc, wchar_t *argv[])
{
try
{
if (argc < 2)
{
std::cout << "No url" << std::endl;
return 1;
}
//Получение страницы посредством get-запроса
const Web::Url l_url(Encoding::utf16to8(reinterpret_cast<char16_t *>(argv[1])));
const std::string l_content(get(l_url));
//Извлечение статьи
std::string l_text;
if (!recognize(l_content, l_text))
{
std::cout << "Couldn't recognize" << std::endl;
return 1;
}
//Формирование путей
const std::u32string l_utf32path(Encoding::utf8to32(l_url.path()));
std::string l_fixedPath;
for (auto j(l_utf32path.begin()); j != l_utf32path.end();)
{
const auto i(*j == '/' ? l_fixedPath += '/', j + 1 : j);
j = std::find(i, l_utf32path.end(), '/');
const size_t l_size = std::min(30, std::distance(i, j));
const std::u32string l_part(i, i + l_size);
l_fixedPath += Encoding::utf32to8(l_part);
}
const std::u32string l_u32fn(Encoding::utf8to32(l_url.file()));
const std::u32string l_base(l_u32fn.substr(0, l_u32fn.find('.')).substr(0, 30));
const std::string l_fixedName(l_base.empty() ? std::string("a.txt") : Encoding::utf32to8(l_base) + ".txt");
//http://boost.2283326.n4.nabble.com/boost-filesystem-path-as-utf-8-tp4320098p4322460.html
boost::filesystem::detail::utf8_codecvt_facet l_utf8;
const boost::filesystem::path l_dirPath(l_url.host() + l_fixedPath, l_utf8);
const boost::filesystem::path l_filePath(l_url.host() + l_fixedPath + '/' + l_fixedName, l_utf8);
//Создание каталогов и сохранения статьи в текстовый файл
boost::filesystem::create_directories(l_dirPath);
boost::filesystem::ofstream l_of(l_filePath, std::ios::binary | std::ios::out);
if (!l_of.is_open())
{
std::cout << "Output file open error" << std::endl;
return -1;
}
l_of.write("\xef\xbb\xbf", 3); //BOM
l_of.write(l_text.data(), l_text.size());
l_of.close();
if (argc > 2)
{
const boost::filesystem::path l_xfp(l_url.host() + l_fixedPath + "/1.html", l_utf8);
boost::filesystem::ofstream l_xof(l_xfp, std::ios::binary | std::ios::out);
if (l_xof.is_open())
{
l_xof.write("\xef\xbb\xbf", 3);
l_xof.write(l_content.data(), l_content.size());
l_xof.close();
}
}
return 0;
}
catch (const std::bad_alloc &)
{
::printf("Mem alloc error");
}
catch (const std::exception &a)
{
std::cout << "Error" << std::endl << a.what() << std::endl;
}
return -1;
}