C ++令牌字符串 [英] C++ Tokenize String

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本文介绍了C ++令牌字符串的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述



例如,如果用户输入forty_five,那么我们将使用一个简单的方法来对字符串输入进行标记化,而不使用Boost等非默认库。

解决方案

要将一个字符串转换为一个令牌的向量线程安全):

  std :: vector< std :: string& inline StringSplit(const std :: string& source,const char * delimiter =,bool keepEmpty = false)
{
std :: vector< std :: string&结果;

size_t prev = 0;
size_t next = 0;

while((next = source.find_first_of(delimiter,prev))!= std :: string :: npos)
{
if(keepEmpty || != 0))
{
results.push_back(source.substr(prev,next - prev));
}
prev = next + 1;
}

if(prev< source.size())
{
results.push_back(source.substr(prev));
}

返回结果;
}


I'm looking for a simple way to tokenize string input without using non default libraries such as Boost, etc.

For example, if the user enters forty_five, I would like to seperate forty and five using the _ as the delimiter.

解决方案

To convert a string to a vector of tokens (thread safe):

std::vector<std::string> inline StringSplit(const std::string &source, const char *delimiter = " ", bool keepEmpty = false)
{
    std::vector<std::string> results;

    size_t prev = 0;
    size_t next = 0;

    while ((next = source.find_first_of(delimiter, prev)) != std::string::npos)
    {
        if (keepEmpty || (next - prev != 0))
        {
            results.push_back(source.substr(prev, next - prev));
        }
        prev = next + 1;
    }

    if (prev < source.size())
    {
        results.push_back(source.substr(prev));
    }

    return results;
}

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