Regular Expression pattern

[Vannela]

I want to match a array pattern in the string specified

Specified string may be any one of this

public function fu_santhu(int a,int b[],string s)

public function ggggg(string sss[],float f,decimal
d,double dd)

public function rrrttt(decimal dd[], int a,int b,string sd)

So want to match the pattern where this "[] " pattern
exists in a function declaration.

Can anyone say me how to specify the pattern?

Thank you.