RFE: select block by columns

[Trucoto]

Some editors have a very useful feature: to make a selection based on a series of columns. For example, say you're using C++ and you have some class:

class A
{
    int Field1;
    int Field2;
    int Field3;
    int Field4;
};

and now you want to copy some of those fields, and some not:

A a, b;

a.Field1 = b.Field1;
a.Field2 = b.Field2;
a.Field3 = b.Field3;

So, what I would like to do would be to select the field names from the class using columns, highlighting from "Field1" to "Field3", which I will simulate here using brackets:

class A
{
    int [Field1];
    int [Field2];
    int [Field3];
    int Field4;
};

then copy that to the clipboard, and then I would write:

a. = b.;

and duplicate that line three times:

a. = b.;
a. = b.;
a. = b.;

and then paste twice, once after the "a." in the first line, and the second time after "b." in the first line:

a.Field1 = b.Field1;
a.Field2 = b.Field2;
a.Field3 = b.Field3;

Naturally, if field names are not of the same length, you have to manually correct here and there, but it's minimum.
Such a feature is available in several editors like brief, SemWare e32, Visual Studio, Notepad++, Vim, etc. and has a lot of useful cases, like erasing unwanted spaces in tables, duplicating partial blocks, etc. See: http://stackoverflow.com/questions/1802616/how-to-column-selection-in-editors-and-ides-notepad-kate-vim-sublime