如何使用升压定期EX pression替代方法？ [英] how to use Boost regular expression replace method?

问题描述

我有这些变量：

boost::regex re //regular expression to use
std::string stringToChange //replace this string
std::string newValue //new value that is going to replace the stringToChange depending on the regex.

我只想只替换了它的第一次出现。

I only want to replace the first occurrence of it only.

感谢小伙子们。

编辑：我发现这一点：

boost::regex_replace(stringToChange, re, boost::format_first_only);

但它说，该函数不存在，我猜的参数是此刻不正确。

but it says the function does not exists, I'm guessing the parameters are incorrect at the moment.

推荐答案

下面是基本用法的例子：

Here is an example of basic usage:

#include <iostream>
#include <string>
#include <boost/regex.hpp>

int main(){
  std::string str = "hellooooooooo";
  std::string newtext = "o Bob";
  boost::regex re("ooooooooo");
  std::cout << str << std::endl;

  std::string result = boost::regex_replace(str, re, newtext);
  std::cout << result << std::endl;
}

输出

hellooooooooo

hellooooooooo

您好鲍勃

请确保您包括＆LT;升压/ regex.hpp方式＆gt; ，并已链接到boost_regex库

Make sure you are including <boost/regex.hpp> and have linked to the boost_regex library.

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