Checking Yacc-Syntax using Regular Expression / C#

Question

I am working on developing a Parser , I would like to check Yacc Syntax using Regular Expression. But It seems that it doesn't work out

       // Yacc-like grammar specifications

//        Ligne ::= Expr '\n' {printf("%d \n" , $1)}
//        Expr : Exp '+' Terme {$$ = $1 + $3; } | Terme ;
//        Terme : Terme '*' Facteur  {$$ = $1 * $3; } | Facteur ;  
//        Facteur : '(' Expr ')'  {$$ = $2; } | Chiffre ;  


String YaccProdS = @"($$)+ [=] [$]+[0-9][^']([$]+[0-9])*";
Check = Regex.Match(Text,YaccProdS);

Answer 1

If you are just looking to get what is inside of the {} the following will get you that, it will also group the $id and the operator.

String YaccProdS = @"(\$+)\s+=\s+(\$+\d+)(\s*([*+\/])\s*(\$+[0-9]+))?"; 

Always remember to escape your special characters, like $.