vim yank all matches of regex group into register

Question

I know that I can yank all matched lines into register A like this: ``` :g/regex/y/A ``` But I can't seem to figure out how to yank match regex groups into register A: ``` :g/$regex$/\1y A (E10: \ should be followed by /, ? or &) ```

Accepted Answer

You can do this with a substitute command.

```
:%s/regex/\=setreg('A', submatch(0))/n
```

This will append register a to whatever the regex matched. The `n` flag will run the command in a sandbox so nothing will actually get replaced but the side effects of the statement will happen.

You probably want to empty the register first with

```
:let @a=''
```

vim yank all matches of regex group into register

Solution

Problem