使用提升program_options失败，并出现奇怪的编译错误
Using boost program_options fails with weird compilation error
我正在尝试使用 Boost 的program_options库为库构建一个简单的命令行应用程序，但它失败了，出现一个非常奇怪的错误。这是所有有问题的代码(是的，它非常简单(：
#include <iostream>
#include <stdexcept>
#include <string>
#include <boost/program_options.hpp>
#include "NCDocEngineInterop.h"
#include "NCDocumentEngine.h"
#include "NCConfigurationManager.h"
#include "NCAcquisitions.h"
namespace po = boost::program_options;
using std::cout;
using std::cerr;
using std::endl;
using std::domain_error;
using std::wstring;
void fail_if_empty(const po::variables_map& variables, const char* field) {
if (!(variables.count(field))) {
cerr << field << " is required, you must provide a value for it" << endl;
throw domain_error(field);
}
}
int main(int ac, char* av[])
{
const char* nsdk_path_option = "nsdk-path"; // NC_CONFIGURATION::NC_NSDK_PATH
const char* ocr_path_option = "ocr-path"; // NC_CONFIGURATION::NC_OCR_PATH
const char* parser_path_option = "parser-path-option"; // NC_CONFIGURATION::NC_PARSER_PATH
const char* pdf_path = "pdf-path"; // NC_CONFIGURATION::NC_PDF_PATH
const char* output_directory = "output-directory";
const char* input_file = "input-file";
po::options_description description("Runs the NDSK engine at the provided files");
description.add_options()
("help", "produce help message")
(nsdk_path_option, po::value<wstring>(), "path to the NSDK")
(ocr_path_option, po::value<wstring>(), "path to the OCR")
(parser_path_option, po::value<wstring>(), "path to the parser")
(pdf_path, po::value<wstring>(),"path to the PDF processor")
(output_directory, po::value<wstring>(), "path to the folder where the output will be stored")
(input_file, po::value<wstring>(), "path to the input file")
;
po::variables_map vm;
po::store(po::parse_command_line(ac, av, description), vm);
po::notify(vm);
fail_if_empty(vm, nsdk_path_option);
fail_if_empty(vm, ocr_path_option);
fail_if_empty(vm, parser_path_option);
fail_if_empty(vm, pdf_path);
fail_if_empty(vm, output_directory);
fail_if_empty(vm, input_file);
NCConfigurationManager::ncSetConfiguration(
NC_NSDK_PATH,
vm[nsdk_path_option].as<wstring>() );
NCConfigurationManager::ncSetConfiguration(
NC_OCR_PATH,
vm[ocr_path_option].as<wstring>() );
NCConfigurationManager::ncSetConfiguration(
NC_PARSER_PATH,
vm[parser_path_option].as<wstring>() );
NCConfigurationManager::ncSetConfiguration(
NC_PDF_PATH,
vm[pdf_path].as<wstring>() );
return 0;
}
发生的编译错误是：
错误错误 C2679：二进制"<<"：找不到需要 类型为"const src"的右操作数(或者没有可接受的操作数 转换( c：\work\dev\source\src\framework\thirdparty\boost\boost\lexical_cast.hpp 1281 1 DocumentProcessor
错误 C2228：".fail"的左侧必须具有类/结构/联合 C：\工作\数字BP\项目\发布开发sdk_4_0\dev\源\src\框架\第三方\boost\boost\lexical_cast.hpp 1281 1 文档处理器
您可以在此处查看 lexical_cast.hpp 文件。
而且我不知道这里发生了什么，也不知道为什么这个代码会发生此错误。我正在使用 boost 1.50.0，现在无法升级它。我也在使用Visual Studio 2010来构建它。
下面是"输出"窗口的输出：
1>c:worksrcframeworkthirdpartyboostboostlexical_cast.hpp(1281): error C2679: binary '<<' : no operator found which takes a right-hand operand of type 'const src' (or there is no acceptable conversion)
1> c:program files (x86)microsoft visual studio 10.0vcincludeostream(679): could be 'std::basic_ostream<_Elem,_Traits> &std::operator <<<wchar_t,std::char_traits<wchar_t>>(std::basic_ostream<_Elem,_Traits> &,const char *)' [found using argument-dependent lookup]
1> with
1> [
1> _Elem=wchar_t,
1> _Traits=std::char_traits<wchar_t>
1> ]
1> c:program files (x86)microsoft visual studio 10.0vcincludeostream(726): or 'std::basic_ostream<_Elem,_Traits> &std::operator <<<wchar_t,std::char_traits<wchar_t>>(std::basic_ostream<_Elem,_Traits> &,char)' [found using argument-dependent lookup]
1> with
1> [
1> _Elem=wchar_t,
1> _Traits=std::char_traits<wchar_t>
1> ]
1> c:program files (x86)microsoft visual studio 10.0vcincludeostream(968): or 'std::basic_ostream<_Elem,_Traits> &std::operator <<<wchar_t,std::char_traits<wchar_t>,const InputStreamable>(std::basic_ostream<_Elem,_Traits> &&,_Ty)' [found using argument-dependent lookup]
1> with
1> [
1> _Elem=wchar_t,
1> _Traits=std::char_traits<wchar_t>,
1> InputStreamable=src,
1> _Ty=src
1> ]
1> c:program files (x86)microsoft visual studio 10.0vcincludeostream(1085): or 'std::basic_ostream<_Elem,_Traits> &std::operator <<<wchar_t,std::char_traits<wchar_t>>(std::basic_ostream<_Elem,_Traits> &,const std::error_code &)' [found using argument-dependent lookup]
1> with
1> [
1> _Elem=wchar_t,
1> _Traits=std::char_traits<wchar_t>
1> ]
1> c:program files (x86)microsoft visual studio 10.0vcincludeostream(186): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(std::basic_ostream<_Elem,_Traits> &(__cdecl *)(std::basic_ostream<_Elem,_Traits> &))'
1> with
1> [
1> _Elem=wchar_t,
1> _Traits=std::char_traits<wchar_t>
1> ]
1> c:program files (x86)microsoft visual studio 10.0vcincludeostream(192): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(std::basic_ios<_Elem,_Traits> &(__cdecl *)(std::basic_ios<_Elem,_Traits> &))'
1> with
1> [
1> _Elem=wchar_t,
1> _Traits=std::char_traits<wchar_t>
1> ]
1> c:program files (x86)microsoft visual studio 10.0vcincludeostream(199): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(std::ios_base &(__cdecl *)(std::ios_base &))'
1> with
1> [
1> _Elem=wchar_t,
1> _Traits=std::char_traits<wchar_t>
1> ]
1> c:program files (x86)microsoft visual studio 10.0vcincludeostream(206): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(std::_Bool)'
1> with
1> [
1> _Elem=wchar_t,
1> _Traits=std::char_traits<wchar_t>
1> ]
1> c:program files (x86)microsoft visual studio 10.0vcincludeostream(226): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(short)'
1> with
1> [
1> _Elem=wchar_t,
1> _Traits=std::char_traits<wchar_t>
1> ]
1> c:program files (x86)microsoft visual studio 10.0vcincludeostream(260): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(unsigned short)'
1> with
1> [
1> _Elem=wchar_t,
1> _Traits=std::char_traits<wchar_t>
1> ]
1> c:program files (x86)microsoft visual studio 10.0vcincludeostream(280): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(int)'
1> with
1> [
1> _Elem=wchar_t,
1> _Traits=std::char_traits<wchar_t>
1> ]
1> c:program files (x86)microsoft visual studio 10.0vcincludeostream(305): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(unsigned int)'
1> with
1> [
1> _Elem=wchar_t,
1> _Traits=std::char_traits<wchar_t>
1> ]
1> c:program files (x86)microsoft visual studio 10.0vcincludeostream(325): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(long)'
1> with
1> [
1> _Elem=wchar_t,
1> _Traits=std::char_traits<wchar_t>
1> ]
1> c:program files (x86)microsoft visual studio 10.0vcincludeostream(345): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(unsigned long)'
1> with
1> [
1> _Elem=wchar_t,
1> _Traits=std::char_traits<wchar_t>
1> ]
1> c:program files (x86)microsoft visual studio 10.0vcincludeostream(366): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(__int64)'
1> with
1> [
1> _Elem=wchar_t,
1> _Traits=std::char_traits<wchar_t>
1> ]
1> c:program files (x86)microsoft visual studio 10.0vcincludeostream(386): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(unsigned __int64)'
1> with
1> [
1> _Elem=wchar_t,
1> _Traits=std::char_traits<wchar_t>
1> ]
1> c:program files (x86)microsoft visual studio 10.0vcincludeostream(407): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(float)'
1> with
1> [
1> _Elem=wchar_t,
1> _Traits=std::char_traits<wchar_t>
1> ]
1> c:program files (x86)microsoft visual studio 10.0vcincludeostream(427): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(double)'
1> with
1> [
1> _Elem=wchar_t,
1> _Traits=std::char_traits<wchar_t>
1> ]
1> c:program files (x86)microsoft visual studio 10.0vcincludeostream(447): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(long double)'
1> with
1> [
1> _Elem=wchar_t,
1> _Traits=std::char_traits<wchar_t>
1> ]
1> c:program files (x86)microsoft visual studio 10.0vcincludeostream(467): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(const void *)'
1> with
1> [
1> _Elem=wchar_t,
1> _Traits=std::char_traits<wchar_t>
1> ]
1> c:program files (x86)microsoft visual studio 10.0vcincludeostream(487): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(std::basic_streambuf<_Elem,_Traits> *)'
1> with
1> [
1> _Elem=wchar_t,
1> _Traits=std::char_traits<wchar_t>
1> ]
1> while trying to match the argument list '(std::basic_ostringstream<_Elem,_Traits,_Alloc>, const src)'
1> with
1> [
1> _Elem=wchar_t,
1> _Traits=std::char_traits<wchar_t>,
1> _Alloc=std::allocator<wchar_t>
1> ]
1> c:worksrcframeworkthirdpartyboostboostlexical_cast.hpp(1499) : see reference to function template instantiation 'bool boost::detail::lexical_stream_limited_src<CharT,Traits,RequiresStringbuffer>::shl_input_streamable<const InStreamable>(InputStreamable &)' being compiled
1> with
1> [
1> CharT=char_type,
1> Traits=traits,
1> RequiresStringbuffer=true,
1> InStreamable=src,
1> InputStreamable=src
1> ]
1> c:worksrcframeworkthirdpartyboostboostlexical_cast.hpp(1974) : see reference to function template instantiation 'bool boost::detail::lexical_stream_limited_src<CharT,Traits,RequiresStringbuffer>::operator <<<Source>(const InStreamable &)' being compiled
1> with
1> [
1> CharT=char_type,
1> Traits=traits,
1> RequiresStringbuffer=true,
1> Source=src,
1> InStreamable=src
1> ]
1> c:worksrcframeworkthirdpartyboostboostlexical_cast.hpp(1921) : while compiling class template member function 'std::wstring boost::detail::lexical_cast_do_cast<Target,Source>::lexical_cast_impl(const Source &)'
1> with
1> [
1> Target=std::wstring,
1> Source=src
1> ]
1> c:worksrcframeworkthirdpartyboostboostlexical_cast.hpp(2133) : see reference to class template instantiation 'boost::detail::lexical_cast_do_cast<Target,Source>' being compiled
1> with
1> [
1> Target=std::wstring,
1> Source=src
1> ]
1> c:worksrcframeworkthirdpartyboostboostprogram_optionsdetailvalue_semantic.hpp(89) : see reference to function template instantiation 'Target boost::lexical_cast<T,std::basic_string<_Elem,_Traits,_Ax>>(const Source &)' being compiled
1> with
1> [
1> Target=std::wstring,
1> T=std::wstring,
1> _Elem=char,
1> _Traits=std::char_traits<char>,
1> _Ax=std::allocator<char>,
1> Source=std::basic_string<char,std::char_traits<char>,std::allocator<char>>
1> ]
1> c:worksrcframeworkthirdpartyboostboostprogram_optionsdetailvalue_semantic.hpp(170) : see reference to function template instantiation 'void boost::program_options::validate<T,char>(boost::any &,const std::vector<_Ty> &,T *,long)' being compiled
1> with
1> [
1> T=std::wstring,
1> _Ty=std::string
1> ]
1> c:worksrcframeworkthirdpartyboostboostprogram_optionsdetailvalue_semantic.hpp(163) : while compiling class template member function 'void boost::program_options::typed_value<T,charT>::xparse(boost::any &,const std::vector<_Ty> &) const'
1> with
1> [
1> T=std::wstring,
1> charT=char,
1> _Ty=std::string
1> ]
1> c:worksrcsamplescppdocumentprocessordocumentprocessormain.cpp(37) : see reference to class template instantiation 'boost::program_options::typed_value<T,charT>' being compiled
1> with
1> [
1> T=std::wstring,
1> charT=char
1> ]
1>c:worksrcframeworkthirdpartyboostboostlexical_cast.hpp(1281): error C2228: left of '.fail' must have class/struct/union
========== Rebuild All: 0 succeeded, 1 failed, 0 skipped ==========
问题实际上就在这里：
po::store(po::parse_command_line(ac, av, description), vm);
parse_command_line 实例化了一个basic_command_line_parser<charT>，其中 charT 当然是char，而不是wchar_t，因为av是 char** 类型。这意味着options_description中的所有字符串必然是basic_string<char>的，即 std::string而不是std::wstring.
如果您考虑一下，这实际上是有意义的，因为命令行选项总是作为普通的旧"c"字符串到达。即使它们是 mbcs 编码的，您也有责任使用正确的区域设置执行转换。不幸的是，这是必要的，因为 MBCS 的解释是特定于区域设置的。
我看了一下是否可以创建options_description的wchar_t版本(如果您想从wmain()使用它，但事实并非如此。 options_description包含硬编码std::string。
多字节字符串引用
相关文章：
- 用MacOS Mojave编译C++:致命错误:mpi.h:没有这样的文件或目录
- std::is_base_of表示ctor编译错误
- 我的项目不会像"undefined reference to `grpc::g_core_codegen_interface'"那样使用未定义的引用错误进行编译
- 在没有定义返回类型的函数中返回布尔值，并将结果保存在无错误的char编译中-为什么
- Qt5:使用QCommandLineParser类时出现奇怪的编译错误
- Qt Cmake 错误编译"GuiSupportQt not found"
- Opengl 精度转换错误编译错误 E0415
- 库将ARM架构错误编译为架构X64
- RT 音频 Mac 错误 g++ 编译错误
- 错误编译Boost.log
- 错误编译QT创建者 / QT窗口小部件示例
- 错误编译MIPS32
- Visual Studio 2013 中的错误(编译和运行代码）
- 链接错误编译qt项目在visual 2010
- 无法用模板错误编译nsgmls
- 奇怪的错误.编译失败
- 如果有人调用c++中的方法，则强制错误(编译时)
- 来自autoconf测试的错误编译命令
- 时间限制超出错误C++编译
- SFML 2.3 和 CodeBlocks 错误编译
