3
我试图从字符串中提取不同类型的数据。使用字符串流将字符串转换为__uint128_t
void readHeader(char buf[BUFFSIZE])
{
std::istringstream hdr(buf);
__uint128_t id_client;
hdr >> id_client; // doesn't compile
}
我得到这个错误,当我做到这一点hdr >> id_client
:
Unix/UnixSocket.cpp:158:10: error: ambiguous overload for ‘operator>>’ in ‘hdr >> id_client’ Unix/UnixSocket.cpp:158:10: note: candidates are: In file included from /usr/include/c++/4.7/sstream:39:0,
from Unix/UnixSocket.cpp:11: /usr/include/c++/4.7/istream:118:7: note: std::basic_istream<_CharT,
_Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(std::basic_istream<_CharT, _Traits>::__istream_type& (*)(std::basic_istream<_CharT, _Traits>::__istream_type&)) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT,
_Traits>::__istream_type = std::basic_istream<char>] <near match> /usr/include/c++/4.7/istream:118:7: note: no known conversion for argument 1 from ‘__int128 unsigned’ to ‘std::basic_istream<char>::__istream_type& (*)(std::basic_istream<char>::__istream_type&) {aka std::basic_istream<char>& (*)(std::basic_istream<char>&)}’ /usr/include/c++/4.7/istream:122:7: note: std::basic_istream<_CharT,
_Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(std::basic_istream<_CharT, _Traits>::__ios_type& (*)(std::basic_istream<_CharT, _Traits>::__ios_type&)) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT,
_Traits>::__istream_type = std::basic_istream<char>; std::basic_istream<_CharT, _Traits>::__ios_type = std::basic_ios<char>] <near match> /usr/include/c++/4.7/istream:122:7:
有什么办法妥善我id_client
存储在这个__uint128_t
变量?
由于类型不是标准类型,因此标准库不支持它。你必须手动解析和转换数字。 – 2014-11-02 15:03:34
如果编译器支持它,也许你可以使用'uint128_t'。 – justanothercoder 2014-11-02 15:05:04
@JoachimPileborg我很确定他正在寻找来自clang/gcc团队的标准库的补充,因为他们已经将类型添加到他们的编译器中。如果能找到它,这是一个有趣的问题。 – 2015-01-22 09:51:28