Reveal the truth about the regular expression lxfregex [Source]

Regular Expressions are widely used and often used for search and replacement.Programming LanguageAll of them support a variety of places, such as JS, Java, C # all have their own implementation classes, so it is very convenient to use.
I really want to figure out how he did it in every language, so before getting the source code, I first started to use the C # language to create a class that supports regular expressions, currently, the implementation function is very simple and supports the implementation of ismatch and relace to process basic characters,
CodeThere are many shortcomings. I hope you will forgive me.

Sample Code:

Lxfregex lxf =   New Lxfregex (txtregex. Text );


Stringbuilder sb =   New Stringbuilder ();
SB. appendline ( " Brackets " );

Foreach (Matchunit mu In Lxf. Matches (txtsrc. Text ))
{
SB. appendline ( " Match "   + IND ++ );
Int I =   0 ;
For ( Int J =   0 ; J < Mu. Groups. Count; j ++ )
{
SB. appendline ( " Group "   + J + Mu. Groups [J]. value );

Foreach (Captureunit t In Mu. Groups [J]. captures)
{
SB. append ( " Capture "   + I );
SB. append ( " Index: "   + T. Index +   " Length: "   + T. Length );
SB. append ( " = "   + T. value );
SB. appendline ();
I ++ ;
}
}
}
This . Txtmatch. Text = SB. tostring ();

Demo location:
Http://www.iyuyan.com/regexlove Language
Download source code:

Source code