regex_search在cppreference中抛出错误 [英] regex_search in cppreference throw error

问题描述

我在cppreference网站中执行示例程序，并抛出错误。怎么可能？请帮助

我也尝试在我的4.8.1 GCC编译器，它也抛出错误。

输出：

regex_error'

  what（）：regex_error 
  

  #include< iostream> 
 #include< string> 
 #include< regex> 
 
 int main（）
 {
 std :: string lines [] = {Roses are＃ff0000，
violets are＃0000ff，
我的所有基地都属于你}; 
 
 std :: regex color_regex（＃（[a-f0-9] {2}）
（[a-f0-9] {2}）
（[a-f0-9] {2}））; 
 
 for（const auto& line：lines）{
 std :: cout<线<< ：
<< std :: regex_search（line，color_regex）<< '\\\
'; 
} 
 
 std :: smatch color_match; 
 for（const auto& line：lines）{
 std :: regex_search（line，color_match，color_regex）; 
 std :: cout<< matches for'<<线<< '\\\
; 
 for（size_t i = 0; i< color_match.size（）; ++ i）{
 std :: ssub_match sub_match = color_match [i]; 
 std :: string sub_match_str = sub_match.str（）; 
 std :: cout<< i<< ：<< sub_match_str<< '\\\
'; 
} 
} 
} 
  

解决方案>

在GCC 4.8.1中，完全支持C ++ 11核心语言，但是与Clang不同，GCC不完全支持C ++ 11标准库。
从 libstdc ++实现状态页，std :: regex尚未完全实现。

I ran the sample program in cppreference website and throw an error. How can that be? please help

I also try on my 4.8.1 GCC compiler and it throw error either.

Output:

terminate called after throwing an instance of 'std::regex_error'

  what():  regex_error

#include <iostream>
#include <string>
#include <regex>

int main()
{
    std::string lines[] = {"Roses are #ff0000",
                           "violets are #0000ff",
                           "all of my base are belong to you"};

    std::regex color_regex("#([a-f0-9]{2})"
                            "([a-f0-9]{2})"
                            "([a-f0-9]{2})");

    for (const auto &line : lines) {
        std::cout << line << ": " 
                  << std::regex_search(line, color_regex) << '\n';
    }   

    std::smatch color_match;
    for (const auto &line : lines) {
        std::regex_search(line, color_match, color_regex);
        std::cout << "matches for '" << line << "'\n";
        for (size_t i = 0; i < color_match.size(); ++i) {
            std::ssub_match sub_match = color_match[i];
            std::string sub_match_str = sub_match.str();
            std::cout << i << ": " << sub_match_str << '\n';
        }   
    }   
}

解决方案

In GCC 4.8.1, C++11 core-language is fully supported, but unlike Clang, GCC does not have full support for the C++11 Standard Library. As it can be seen on the libstdc++ Implementation Status page, std::regex are not fully implemented yet.

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