正则表达式：匹配多个平衡组

Question

I'm searching for a regex to match all C# methods in a text and the body of each found method (refrenced as "Content") should be accessible via a group.

The C# Regex above only gives the desired result if there exists exactly ONE method in the text.

Source text:

void method1(){

if(a){ exec2(); }   
else {  exec3(); }  

}

void method2(){

if(a){ exec4(); }   
else {  exec5(); }  

}

The regex:

string pattern = "(?:[^{}]|(?<Open>{)|(?<Content-Open>}))+(?(Open)(?!))";
MatchCollection methods  = Regex.Matches(source,pattern,RegexOptions.Multiline);
 foreach (Match c in methods)
 {
    string body = c.Groups["Content"].Value; // = if(a){ exec2(); }else {  exec3();}
    //Edit: get the method name
    Match mDef= Regex.Match(c.Value,"void ([\\w]+)");
    string name = mDef.Groups[1].Captures[0].Value;
 }

If only the method1 is contained in source, it works perfectly, but with additional method2 there is only one Match, and you cannot extract the individual method-body pairs any more.

How to modify the regex to match multiple methods ?

Answer 1

Assuming you only want to match basic code like those samples in your question, you can use

(?<method_name>\w+)\s*\((?s:.*?)\)\s*(?<method_body>\{(?>[^{}]+|\{(?<n>)|}(?<-n>))*(?(n)(?!))})

See demo

To access the values you need, use .Groups["method_name"].Value and .Groups["method_body"].Value .