Boost :: Xpressive在MinGW下的编译难题

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问题描述

第一次切换到GCC，我对编译器在这里告诉我有点困惑。基本上，它的行为像boost :: xpressive :: wsregex没有定义（我相信）。

Switching to GCC for the first time, and I'm getting a bit confused by what the compiler is telling me here. Essentially, it's behaving like boost::xpressive::wsregex is not defined (I believe).

这里是相关的代码：

#include "criterion.h"
#include <string>
#include <boost/xpressive/xpressive.hpp>

//More lines of code omitted here

class perlRegex : public regexClass
{
private:
    std::wstring regexString;
    boost::xpressive::wsregex regex;   // This is the line complained about
public:
    unsigned __int32 getPriorityClass() const;
    BOOL include(fileData &file) const;
    unsigned int directoryCheck(const std::wstring& /*directory*/) const;
    std::wstring debugTree() const;
    perlRegex(const std::wstring& inRegex);
};

这里是错误：

regex.h:46: error: using-declaration for non-member at class scope
regex.h:46: error: expected `;' before "regex"

我在这里感到困惑的是，我宣布一个成员，但它抱怨说，我使用

What I'm confused about here is that I'm declaring a member, yet it complains that I'm using a member somewhere else.

我忘记了 #include 什么？

提前感谢，
Billy3

Thanks in advance,Billy3

推荐答案

cygwin和mingw不支持宽字符xpressive也不能。从xpressive_fwd.hpp中查看以下内容：

cygwin and mingw do not support wide characters, so xpressive can't either. See the following from xpressive_fwd.hpp:

#if defined(BOOST_NO_CWCHAR) | \
    defined(BOOST_NO_CWCTYPE) | \
    defined(BOOST_NO_STD_WSTRING)
# ifndef BOOST_XPRESSIVE_NO_WREGEX
#  define BOOST_XPRESSIVE_NO_WREGEX
# endif
#endif

宏BOOST_NO_CWCHAR，BOOST_NO_CWCTYPE和BOOST_NO_STD_WSTRING由platcorm / compiler / std-library的boost的config.hpp标头自动定义。

The macros BOOST_NO_CWCHAR, BOOST_NO_CWCTYPE and BOOST_NO_STD_WSTRING are defined automatically by boost's config.hpp header for your platcorm/compiler/std-library. Sorry.

以后，您会得到更好的结果，将提升问题发布到boost用户列表中。

In the future, you'll get better results posting boost questions to the boost users' list.

-
Eric Niebler
BoostPro Computing
www.boostpro.com

--Eric NieblerBoostPro Computingwww.boostpro.com

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