Question

I have several classes that I need to format. I need to place the using directives inside the namespace. In other words I have to change:

// some comment about system
using System;
using System.Collections.Generics; // needed to create lists

namespace MyNamespace
{
     ... code

into:

namespace MyNamespace
{

     // some comment about system
     using System;
     using System.Collections.Generics; // needed to create lists

     ... code

So in short I will like to be able to match:

// some comment about system
using System;
using System.Collections.Generics; // needed to create lists

---

what I have worked so far is this regex: (?s)(//.*?(?=\r))(\r\n|^)*using .*?;

the first group (//.*?(?=\r))(\r\n|^) matches a comment. so if the using has a comment I will like to take that comment also. Note that I placed a * at the end of the group in order to have 0 or more comments. for some reason the second using is not matched why?

Answer 1

IF you where to have something like:

// comment goes here
using System.Text.RegularExpressions; // for regexes
using System.Text; /* comment */
using System.Collections.Generic; // som comment
   /* this is a long comment
       that spans multiple lines
       in order to explain this using */
using System.Foo;




namespace EncloseCodeInRegion
{

the regex:

(((//.*?\r\n)|( */\*[\s\S]*?\*/))?(\r\n)? *using .+?;(( *//.*(?=\r))|( */\*[\s\S]*?\*/))?)(?=[\s\S]*?namespace)

would match the all the using statements.