【发布时间】：2021-08-17 20:25:51
【问题描述】：
- TSDuck 版本 3.27.2438
- GCC 版本 8.3.1
- Centos 7.9
我正在尝试针对 TSDuck 编译一些代码（RPM 安装版本 3.27-2438）。我在 UString.h 上收到编译错误。 GCC 似乎对在擦除函数中使用 const_iterator 不满意。据我了解，自 C++11 起就允许这样做，应该在 GCC 8.3.1 中实现。有没有其他人遇到过这个问题？这似乎是一个编译器错误，但我也在 GCC 9.3.1 中尝试过并得到了同样的错误。
错误：
/usr/include/tsduck/tsUString.h:2088:84: error: no matching function for call to ‘ts::UString::erase(std::basic_string<char16_t>::const_iterator&)’
iterator erase(const_iterator position) { return SuperClass::erase(position); }
^
In file included from /opt/rh/devtoolset-8/root/usr/include/c++/8/string:52,
from /opt/rh/devtoolset-8/root/usr/include/c++/8/stdexcept:39,
from /opt/rh/devtoolset-8/root/usr/include/c++/8/array:39,
from /opt/rh/devtoolset-8/root/usr/include/c++/8/tuple:39,
from /opt/rh/devtoolset-8/root/usr/include/c++/8/bits/unique_ptr.h:37,
from /opt/rh/devtoolset-8/root/usr/include/c++/8/memory:80,
from /workspaces/ts_reader/src/ts_reader/ts_reader.cpp:4:
/opt/rh/devtoolset-8/root/usr/include/c++/8/bits/basic_string.h:4632:7: note: candidate: ‘std::basic_string<_CharT, _Traits, _Alloc>& std::basic_string<_CharT, _Traits, _Alloc>::erase(std::basic_string<_CharT, _Traits, _Alloc>::size_type, std::basic_string<_CharT, _Traits, _Alloc>::size_type) [with _CharT = char16_t; _Traits = std::char_traits<char16_t>; _Alloc = std::allocator<char16_t>; std::basic_string<_CharT, _Traits, _Alloc>::size_type = long unsigned int]’
erase(size_type __pos = 0, size_type __n = npos)
^~~~~
/opt/rh/devtoolset-8/root/usr/include/c++/8/bits/basic_string.h:4632:7: note: no known conversion for argument 1 from ‘std::basic_string<char16_t>::const_iterator’ {aka ‘__gnu_cxx::__normal_iterator<const char16_t*, std::basic_string<char16_t> >’} to ‘std::basic_string<char16_t>::size_type’ {aka ‘long unsigned int’}
/opt/rh/devtoolset-8/root/usr/include/c++/8/bits/basic_string.h:4648:7: note: candidate: ‘std::basic_string<_CharT, _Traits, _Alloc>::iterator std::basic_string<_CharT, _Traits, _Alloc>::erase(std::basic_string<_CharT, _Traits, _Alloc>::iterator) [with _CharT = char16_t; _Traits = std::char_traits<char16_t>; _Alloc = std::allocator<char16_t>; std::basic_string<_CharT, _Traits, _Alloc>::iterator = __gnu_cxx::__normal_iterator<char16_t*, std::basic_string<char16_t> >; typename _Alloc::rebind<_CharT>::other::pointer = char16_t*]’
erase(iterator __position)
^~~~~
/opt/rh/devtoolset-8/root/usr/include/c++/8/bits/basic_string.h:4648:7: note: no known conversion for argument 1 from ‘__normal_iterator<const char16_t*,[...]>’ to ‘__normal_iterator<char16_t*,[...]>’
/opt/rh/devtoolset-8/root/usr/include/c++/8/bits/basic_string.h:4668:7: note: candidate: ‘std::basic_string<_CharT, _Traits, _Alloc>::iterator std::basic_string<_CharT, _Traits, _Alloc>::erase(std::basic_string<_CharT, _Traits, _Alloc>::iterator, std::basic_string<_CharT, _Traits, _Alloc>::iterator) [with _CharT = char16_t; _Traits = std::char_traits<char16_t>; _Alloc = std::allocator<char16_t>; std::basic_string<_CharT, _Traits, _Alloc>::iterator = __gnu_cxx::__normal_iterator<char16_t*, std::basic_string<char16_t> >; typename _Alloc::rebind<_CharT>::other::pointer = char16_t*]’
erase(iterator __first, iterator __last);
^~~~~
【问题讨论】：
-
请创建一个minimal reproducible example 并显示用于编译代码的确切命令。 Fwiw，当使用
ts:UString并使用std::basic_string<char16_t>::const_iterator(ts::UString::const_iterator) 调用其erase()成员函数时，我没有收到此编译错误。