Question

我有一个.sln文件，我需要从中获取一些数据。 .sln文件看起来像that。我需要这个文件的项目名称。如果它看起来正确的话，我还有一个可以使用带字符串的代码。所以我试着做一个正则表达式

“项目（\”{[\ W - ] +} \ “）\ S * = \ S * \”（\ W +）\ “[，\ S] + \”（[\ W \] *。 vcxproj）\ “[，\ S] + \”（{[\ W - ] +}）\ “”

#include <iostream>
#include <string>
#include <vector>
#include <regex>
#include <fstream>

using namespace std;

int main()
{
    ifstream ifstr("C:\\Users\\Andrew\\Documents\\Visual Studio 2015\\Projects\\ConsoleApplication1\\ConsoleApplication1.sln");
    string all;
    //Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "doctor", "dreryk\src\doctor\doctor.vcproj", "{5D031DBA-1903-4067-A2CE-01B104A08D48}"
    regex projParse("Project\(\"\{[\w-]+\}\"\)\s*=\s*\"(\w+)\"[,\s]+\"([\w\\]*\.vcxproj)\"[,\s]+\"(\{[\w-]+\})\"");
    ifstr.seekg(0);
    string pth, sol;
    match_results<string::const_iterator> what;
    while (getline(ifstr, sol))
    {
        string::const_iterator start = sol.begin();
        string::const_iterator end = sol.end();
        if (regex_search(start, end, what, projParse))
        {
            cout << what[0] << endl;
        }
    }
}

当我尝试使用此代码时，它表示存在错误。我不知道如何解决它。

错误是：

ConsoleApplication1.exe中0x775EC42D处的未处理异常：Microsoft C ++异常：内存位置0x0031E890处的std :: regex_error。

Answer 1

所以，我放弃了这一点，我相信我简化了你的正则表达式。这是一些代码：

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

using namespace std;


void show_matches(const std::string& in, const std::string& re)
{
    smatch m;
    regex_search(in, m, std::regex(re));
    if(m.empty()) {
        cout << "input=[" << in << "], regex=[" << re << "]: NO MATCH\n";
    } else {
        cout << "input=[" << in << "], regex=[" << re << "]: ";
        cout << "prefix=[" << m.prefix() << "] ";
        for(size_t n = 0; n < m.size(); ++n)
            cout << " m[" << n << "]=[" << m[n] << "] ";
        cout << "suffix=[" << m.suffix() << "]\n";
    }
}

int main()
{

    show_matches("Project(\"{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}\") = \"doctor\", \"dreryk\\src\\doctor\\doctor.vcproj\\\", \"{5D031DBA-1903-4067-A2CE-01B104A08D48}\"", 
    "Project\\(\"\\{([^\\}]*)\\W+(\\w+)\\W+(.*).vcproj\\W+([^\\}]*)\\W+");
}

正则表达式：

Project\(\"\{([^\}]*)\W+(\w+)\W+(.*).vcproj\W+([^\}]*)\W+

细分：

Project\(\"\{  -- Literally match Project("{
([^\}]*) -- Capture group 1: Capture all characters until }
\W+ -- Eat all non-letter characters until the next capture group
\w+ -- Capture group 2 -- Eat everything until non character (in this case ")
\W+ -- Eat all non-letter characters until we get to our next capture group
(.*).vcproj  -- Capture group 3 eat everything until .vcproj
\W -- Eat everything until our last capture group
([^\}]*) -- Capture group 4 - eat everything until }
\W+ Eat until the end of the string.

输入：

Project(\"{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}\") = \"doctor\", \"dreryk\\src\\doctor\\doctor.vcproj\\\", \"{5D031DBA-1903-4067-A2CE-01B104A08D48}\""

输出：

prefix=[]  m[0]=[Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "doctor", "dreryk\src\doctor\doctor.vcproj\", "{5D031DBA-1903-4067-A2CE-01B104A08D48}"]  m[1]=[8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942]  m[2]=[doctor]  m[3]=[dreryk\src\doctor\doctor]  m[4]=[5D031DBA-1903-4067-A2CE-01B104A08D48] suffix=[]

如果您需要，上面的代码非常适合在C ++中测试正则表达式 - 它来自cppreference.com上的代码（信用在哪里到期）

祝你好运

c ++中的正则表达式不正确

1 个答案: