正则表达式:匹配单词的第一次出现

Question

这个问题在这里已经有了答案:





My regex is matching too much. How do I make it stop? [duplicate]

(5 个回答)


2年前关闭。




出什么问题了 :

/(?<={).+(?=public)/s

全文

class WeightConvertor {

private:
    double gram;
    double Kilogram;
    double Tonnes;
    void SetGram(double);
    void SetKiloGram(double);
    void SetTonnes(double);
matching end

public:
    WeightConvertor();
    WeightConvertor(double, double, double);
    ~WeightConvertor();
    void SetWeight(double, double, double);
    void GetWeight(double&, double& ,double&);
    void PrintWeight();
    double TotalWeightInGram();

public:

};

我怎么能只匹配这个文本:

private:
    double gram;
    double Kilogram;
    double Tonnes;
    void SetGram(double);
    void SetKiloGram(double);
    void SetTonnes(double);
matching end

Answer 1

你想要一个懒惰的匹配:

/(?<={).+?(?=public)/s

另见: What is the difference between .*? and .* regular expressions?
(我也回答了，好像)