Question

#include <string>
#include <tr1/regex>

#include "TextProcessing.h"

const std::string URL_PATTERN("((http://)[-a-zA-Z0-9@:%_\\+.~#?&//=]+)");
const std::string REPLACEMENT("<a href=\"$&\"\">$&</a>");

std::string textprocessing::processLinks(const std::string & text)
{

    // essentially the same regex as in the previous example, but using a dynamic regex
    std::tr1::regex url(URL_PATTERN);

    // As in Perl, $& is a reference to the sub-string that matched the regex
    return std::tr1::regex_replace(text, url, REPLACEMENT);
}

我正在使用mingw gcc编译器4.5.0版本。

我收到了以下错误：

%DEV%> mingw32-make all
g++  -Wl,--enable-auto-import -Wall -Wextra -std=c++0x -pedantic -Werror -c  -I./include TextProcessing.cpp
cc1plus.exe: warnings being treated as errors
c:\dev\mingw\bin\../lib/gcc/mingw32/4.5.0/include/c++/tr1_impl/regex:2390:5: error: inline function '_Out_iter std::tr1::regex_replace(_Out_iter, _Bi_iter, _Bi_iter, const std::tr1::basic_regex<_Ch_type, _Rx_traits>&, const std::basic_string<_Ch_type>&, std::tr1::regex_constants::match_flag_type) [with _Out_iter = std::back_insert_iterator<std::basic_string<char> >, _Bi_iter = __gnu_cxx::__normal_iterator<const char*, std::basic_string<char> >, _Rx_traits = std::tr1::regex_traits<char>, _Ch_type = char, std::tr1::regex_constants::match_flag_type = std::bitset<11u>]' used but never defined
mingw32-make: *** [TextProcessing.o] Error 1
Process mingw32-make exited with code 2

Answer 1

是的，在我的g ++ include文件中，我也看到regex_replace已声明且未定义。对我来说，它位于文件/usr/include/c++/4.4.4/tr1_impl/regex中。声明正上方是Doxygen评论部分，其中包括：

/** @todo Implement this function. */

Answer 2

您的标准C ++库没有完整的c ++ 0x（现在是c ++ 1x？）支持。尝试使用Boost的代码。另请参阅this answer。

从<tr1 regex =“”> </tr1>使用regex_replace函数时出错

2 个答案: